ПОЛУЧЕНИЕ АЗОТНО-ФОСФОРНО-КАЛИЙНЫХ ИЛИ АЗОТНО-ФОСФОРНЫХ МАТЕРИАЛОВ, СОДЕРЖАЩИХ ПОЛИФОСФАТЫ

... 1. Азотно-фосфорно-калийный (NPK) или азотно-фосфорный (NP) материал из нитрофосфатного процесса, отличающийся тем, что содержит по меньшей мере 5 мас.% конденсированных фосфатов (полифосфатов), предпочтительно по меньшей мере 8% и более предпочтительно по меньшей мере 10 мас.% фосфатов в виде конденсированных фосфатов (полифосфатов), и что общее количество фосфор-содержащих соединений в NPK или NP материале включает 50-95 мас.% водорастворимых фосфатов. ! 2. Материал по п.1, отличающийся тем, что NPK или NP материал содержит 60-95 мас.% водорастворимых фосфатов. ! 3. Материал по п.1, отличающийся тем, что общее количество фосфор-содержащих соединений в NPK или NP материале включает 5-40 мас.% конденсированных фосфатов (полифосфатов). ! 4. Материал по п.1, отличающийся тем, что общее количество фосфор-содержащих соединений в NPK или NP материале включает 8-35 мас.% фосфатов в виде конденсированных фосфатов (полифосфатов). ! 5. Материал по п.1, отличающийся тем, что общее количество фосфор-содержащих ...

Установка для получения фосфатов аммония

Изобретение относится к технике получения минеральных удобрений и может быть использовано в химической промышленности. Цель изобретения - снижение энергозатрат и упрощение установки получения фосфатов аммония. Установка для получения фосфатов аммония содержит нейтрализатор 1, соединенный с барабанным гранулятором-сушилкой (БГС) 3, загрузочная камера 4 которого соединена с топкой 6 и вентилятором 14 для разбавления топочных газов воздухом, а разгрузочная камера 5 соединена через грохот 7 с аппаратом 8 фонтанирующего слоя. Аппарат 8 фонтанирующего слоя используется для охлаждения материала и разделен на две зоны: охлаждения и доохлаждения, при этом газоход 10 зоны охлаждения соединен с вентилятором 14 для разбавления топочных газов, а зона доохлаждения - с вентилятором 15 для выброса отработанного охлаждающего газа. 2 ил.

Способ получения триполифосфата аммония

Изобретение относитс  к технологии получени  полифосфатов, в частности триполифосфата аммони , который может быть использовано в качестве концентрированного удобрени , добавки к удобрени м дл  выравнивани  состава, добавки к синтетическим моющим средствам, как катализатор крекинга нефтепродуктов, активный компонент огнетушащих средств, исходный продукт синтеза полифосфатов. Цель изобретени  - упрощение и ускорение процесса. Сущность изобретени  заключаетс  в том, что осаждение провод т из раствора триполифосфата кали  насыщенным раствором уксуснокислого аммони  при 15 - 25°С и мольном соотношении 1:(66 - 154), 1:(17,6 - 35,4), 1:(26,4 - 35,2) дл  0,2, 1 и 2М растворов триполифосфата кали  соответственно. Полученные кристаллы через сутки отдел ют от раствора, промывают этанолом и высушивают. 1 з.п. ф-лы, 3 табл. The invention relates to the technology of polyphosphate production, in particular ammonium tripolyphosphate, which can be used as a concentrated fertilizer, fertilizer additive for leveling the composition, additives to synthetic detergents, as a catalyst for cracking oil products, the active component of fire extinguishing agents, the original product of the synthesis of polyphosphates. The purpose of the invention is to simplify and speed up the process. The essence of the invention is that the precipitation is carried out from a solution of potassium tripolyphosphate with a saturated solution of ammonium acetate at 15 - 25 ° C and a molar ratio of 1: (66 - 154), 1: (17.6 - 35.4), 1 :( 26.4 - 35.2) for 0.2, 1 and 2M solutions of potassium tripolyphosphate, respectively. The obtained crystals are separated from the solution in a day, washed with ethanol and dried. 1 hp f-ly, 3 tab.

Verfahren zur Herstellung von Ammoniumpolyphosphat

VERFAHREN ZUR HERSTELLUNG VON KRISTALLINEN AMMONIUMPOLYPHOSPHATEN

Verfahren zur Durchfuehrung der Umsetzung zwischen Kaliumphosphaten und aequivalenten Mengen Ammoncarbonat in waessrig-ammoniakalischer Loesung

VERFAHREN ZUR HERSTELLUNG VON AMMONIUMPOLYPHOSPHAT

PRODUCTION OF NITROGEN AND PHOSPHORUS-CONTAINING COMPOUNDS

... 1402542 Compounds containing nitrogen and phosphorus ALBRIGHT & WILSON Ltd 28 July 1972 [27 May 1971] 17505/71 Headings C1A and C1B Compounds containing both N and P and having an N : P ratio of greater than 2À4 : 1, e.g. 2À46 : 1 to 2À69 : 1 are prepared by forming a dispersion of P 2 O 5 in excess liquid NH 3 with agitation under conditions such that local temperatures do not exceed 100‹ C. and then maintaining the reaction mixture containing liquid ammonia at a temperature in the range 30‹ to 100‹ C. for sufficient time to produce compounds having an N : P ratio of greater than 2À4 : 1. Preferably the liquid NH 3 used in the first stage has a bulk temperature of less than 0‹ C., the most preferred temperature being - 33‹ C. The second stage is preferably carried out above 50‹ C., most preferably at 70-80‹ C. The weight ratio of ammonia to P 2 O 5 may be 3 : 1, preferably 5 : 1 and the reaction may take place in the presence of up to 30% H 2 O. Condensed materials useful as flame retardants ...

Non-hygroscopic ammonium phosphate

This Specification relates to a modification of the non-hydroscopic ammonium phosphate claimed in claim 1 of Specification 997,933, wherein in the ammonium phosphate there is a weight ratio of nitrogen to phosphorus (expressed as P2O5) of from 0.14:1 up to, but not including, 0.25:1. The ammonium phosphate is prepared from wet process phosphoric acid, which is heated to expel water and volatile impurities, concentrated, preferably by heating, until its calculated mole ratio of water to P2O5 is 2.0 to 3.5, the resulting anhydrous acid being neutralized with a quantity of ammonia sufficient to form solid ammonium phosphate having the desired nitrogen to phosphorus weight ratio. Ammoniation techniques are as detailed in the parent application. Additional ammoniation techniques at lower temperatures involve dissolving or dispersing the anhydrous acid in an organic reaction medium, e.g. a low boiling hydrocarbon, introducing ammonia to neutralize the acid and separating the solid ammonium phosphate ...

PROCESS FOR MANUFACTURING AMMONIUM POLYPHOSPHATE AND APPARATUS FOR CARRYING OUT THIS PROCESS

... 1315258 Ammonium polyphosphates COMPAGNIE FRANCAISE DE L'AZOTE 18 Nov 1971 [18 Nov 1970] 53667/71 Heading C1A Ammonium polyphosphate is prepared by in a first stage reacting ammonia with phosphoric acid to produce a melt having a molar ratio of N 2 /P 2 O 5 of 0À5-0À72, and then in a second stage concentrating the melt to a P 2 O 5 + NH 3 content of 65-75% by wt., and then in a third stage reacting the concentrate with additional ammonia without the introduction of external heat to give a P 2 O 5 +NH 3 content of not more than 77% by wt. In the first stage, wet process phosphoric acid having a P 2 O 5 content of 28-54% by wt. is pumped from reservoir 1 through a heat exchanger 4 to raise the temp. of the acid to near its b.p. and the hot acid is passed in counterflow with NH 3 in column 7 heated to a temp. of 180‹ C. In the second stage the ammoniated phosphoric acid, passed via pipe 16, is concentrated in the heat exchanger 17. In the third stage the concentrated solution, passed via pipe ...

A process and apparatus for preparation of ammonium phosphates

A process of continuous preparation of a melt of condensed ammonium phosphates by the reaction of phosphoric acid or a solution of ammonium phosphates in phosphoric acid with gaseous ammonia which is dosed into the reaction medium in excess and comprising neutralizing-dehydrating reaction between liquid phase and gaseous ammonia, takes place by continuous contact of phases in a film layer which is formed in the reaction medium by gradual pouring of the liquid phase under gravity and also by its dispersion with gaseous phase formed by a mixture of gradually warmed-up gaseous ammonia and gradually warmed-up steam. The apparatus comprises a standup through-flow film reactor (1) having one supporting bottom (2) with organized and/or non-organized filling (3), a supply of liquid phase containing phosphoric acid (4) and a supply of gaseous ammonia (5). The film reactor can also contain distribution partitions (6), directing the flow of reaction mixture in the filling, building-in (7) and/or static ...

A PROCESS AND APPARATUS FOR PREPARATION OF AMMONIUM PHOSPHATES

Process of producing hydrogen and ammonium phosphates

Ammonium phosphate and hydrogen are made by reacting liquid water, phosphorus, and ammonia under pressure and at temperatures above 100 DEG C. in the presence of a metal of the iron group or a salt thereof. A high temperature, e.g. about 350 DEG C. at a pressure of about 250 atmospheres, gives good results. In the presence of an excess of ammonia and water, the catalyst is unattacked, so that the reaction vessel may consist wholly or to a large extent of said catalyst, e.g. steel. The reagents may be introduced separately, or two in admixture, thus molten phosphorus and ammonia solution, or an emulsion of phosphorus in water and ammonia gas may be separately added, or an emulsion of phosphorus in ammoniacal water may be used. The reaction products are used to preheat the reacting substances. The hydrogen evolved is washed with water to recover its ammonia content for re-use, and after additional purification, if necessary, may be used for the synthesis of ammonia which can be employed in ...

Process for the manufacture of mono-alkali metal phosphates

Mono-alkali metal- or mono-ammonium-phosphates may be prepared by heating, to not above 180 DEG C., H3PO4 with an alkali metal- or ammonium-chloride in a molar ratio of 2:1 respectively, in the presence of vapours of an inert organic solvent having a boiling point at the pressure of the reaction above that of the azeotrope of HCl and H2O at that pressure, and withdrawing a mixture of solvent vapour and HCl from the reaction mixture. The solvent which may be kerosene, white spirit, n-octane, di-n-butyl-, di-sec-butyl-, or di-iso-amyl-ether, or tetrachloroethylene, may be added to the reaction mixture as a liquid, sufficient for the entire reaction or in small quantities throughout the reaction, and evaporated by external heat, or it may be heated separately and contacted as the vapour, in which case the process may be continuous. After removal of the solvent, the crystalline reaction mixture, which in the case of Na or K comprises NaH2PO4.H3PO4 or KH2PO4.H3PO4, can be decomposed by extractive ...

PROCESS FOR THE SEPARATION OF MIXTURES OF PHOSPHORIC AND NITRIC ACID AND PRODUCTS OBTAINED THEREBY

... 1,216,480. Ammonium phosphate and nitrate. ENTREPRISE MINIERE ET CHIMIQUE EX OFFICE NATIONAL INDUSTRIEL DE L'AZOTE. 28 Dec., 1967 [26 Jan., 1967; 17 Aug., 1967], No. 58927/67. Heading C1A. An aqueous mixture of H 3 PO 4 and HNO 3 , obtained e.g. by treatment of phosphate ore with HNO 3 followed by separation of the Ca salt, is extracted with an alcohol containing 4-8 carbon atoms, the water concentration of the alcoholic extract is adjusted if necessary to 8À5-12% by wt., and ammonia is then added to the extract to precipitate ammonium phosphate. NH 4 H 2 P0 4 , (NH 4 ) 2 HP0 4 , or a mixture, is obtained if NH 3 is added until the pH is 3À0-5À5, 7À5-8À5, or 5À5-7À5 resp. The alcohol may be 2-ethyl 1-butyl alcohol, isobutanol, isoamyl alcohol, or C5 oxo synthesis alcohols (n-amyl, active amyl and isoamyl alcohols). 3 phases are obtained: a ppt. of ammonium phosphate, an aqueous solution containing a little NH ; phosphate and part of the NH 4 NO 3 , and an alcoholic solution containing the ...

Biammonic manufactoring process of phosphate to the phosphoric departure of acid of wet process.

Process and apparatus to carry out a chemical reaction utilizing a gas phase.

VERFAHREN ZUR HERSTELLUNG VON SCHNELL LOESLICHEN WENIG HYGROSKOPISCHEN AMMONIUMPOLYPHOSPHAT- MASSEN

PROCEDURE AND PLANT FOR THE PRODUCTION OF AMMONIUM POLYPHOSPHATE.

PROCEDURE FOR THE PRODUCTION OF HYDROLYSIS-STABLE POWDERED ONE AMMONIUM POLYPHOSPHATES.

AMMONIUM POLYPHOSPHATE WITH A HIGH NON-ORTHO P2O5 CONTENT

SOLID AMMONIUM POLYPHOSPHATE COMPOSITIONS AND METHOD FOR THE MANUFACTURE THEREOF

PROCESS FOR THE PREPARATION OF CRYSTALLINE PRECIPITATES BY REACTION OF SOLUTIONS

Verfahren zur technischen Herstellung von Diammoniumphosphat.

Verfahren zur Herstellung einer zur Komplexsalzbildung mit Metallionen geeigneten Stickstoffphosphorsäureverbindung.

Verfahren zur Herstellung von Salzen und Säuren

Verfahren zur Herstellung eines in Wasser viskose Lösungen ergebenden Ammoniumsalzes einer hochpolymeren Metaphosphorsäure.

Procédé de fabrication de phosphate biammonique au départ d'acide phosphorique de voie humide

Verfahren zur Herstellung von Monoammonphosphat.

Verfahren zur technischen Herstellung von Dikalziumphosphat.

Verfahren zur Herstellung von Phosphaten

Procédé de séparation des mélanges d'acides phosphorique et nitrique ou chlorhydrique

Verfahren zur Herstellung von Ammoniumpolyphosphaten

VERFAHREN ZUR GEWINNUNG VON CALCIUMFLUORID UND LOESLICHEM PHOSPHAT AUS CALCIUMPHOSPAT UND FLUOR ENTHALTENDEN MINERALIEN.

Verfahren zur Herstellung von kettenförmigem Ammoniumpolyphosphat

Procédé pour faire réagir un réactif gazeux avec un réactif liquide et application de ce procédé

Process for the production of diammonium phosphate solid

Fluid mixing reactor - with helical reaction channel suitable for prodn ammonium phosphates

Process of dehydration of solutions containing of divalent ammonium phosphate

Production of ammonium polyphosphate solutions

Simultaneous manufactoring process of hydrogen and ammonia phosphate

Improvements relative to a process of obtaining phosphoric anhydride and ammonia complexes

METHOD OF PREPARING CALCIUM FLUORIDE AND SOLUBLE PHOSPHATE FROM FLUORINE CONTAINING PHOSPHATE ROCK

A method for simultaneously manufacturing ammonia phosphate and hydrogen

Automated mono:ammonium phosphate prodn. - by reacting ammonia and phosphoric acid in closed reactor, then discharging soln. to low pressure zone

Mfr of polyphosphates - direct from orthophosphoric acid

In a process for obtaining ammonium polyphosphate by the direct treatment of phosphoric acid with ammonia; the orthophosphates thus obtd. are then polymsd., using their own heat of formation in the process. To avoid the formation of foam and spillage in the heating tank encountered with certain grades of orthophosphoric acid; a higher degree of polymsn. is attained and this leads to better storage possibilities and to increased sequestration props. Hot orthophosphoric acid meets a current of ammonia in a 'T' reactor and is neutralised to an orthophosphate; heat produced in this reaction raises the temp. of the mixt. to 200 degrees C, and this cause the polymsn. of the orthophosphate to a polyphosphate.

PROCESS FOR THE MANUFACTURE OF AMMONIUM POLYPHOSPHATE

Heat control of fast demical exotherim - reactions

Reactions e.g. the ammoniation of phosphoric acid and phosphoric acid with polyphosphoric acid constituents are carried out by mixing the required reagents and water, when at least part of the reagents fully reacts with a mixture of reagents within a certain period, with the prodn. of steam, and cooling the mixture of reaction products. Specifically, cooling is by counter-flow air and the reaction period is from 0.1 sec-3.0 min. the reagents specifically are phosphoric acid, ammonia and water and the temp. of the reactive mixture is maintained constant at 65-176 degrees C.

Method for manufacturing phosphate initially wet process phosphoric acid

MANUFACTURE OF SOLID MATERIALS IN A MOVING BED REACTOR

Process for the production of ammonium phosphate

Phosphoric acid ammoniation apparatus with water quench

An apparatus for reacting phosphoric acid and ammonia to form a molten reaction mixture, to which water can be added to produce an ammonium polyphosphate product, comprises: (A) fluid reactor means having a plurality of inlet means suitable for administration of reactants and positioned to provide for rapid ammoniation of the phosphoric acid with evolution of heat and aperatures to the other end providing exit means for the reaction mixture, said reactor means being adapted to the expulsion of the reaction mixture by steam generated in situ; (B) means for separating the steam from the liquid product solution and removal of said steam from the apparatus; and (C) columnar vessel means having outlet means at one end and enclosing at the other end the exit means of said fluid reactor means and a plurality of barrier means partially blocking said columnar vessel means in spaced-apart relationship and having aperatures therein for passage of reaction product therethrough and inlet means suitable ...

Method for producing strong base phosphates

The inventive method for producing strong base phosphates consists in forming a pulp consisting of an aqueous phase which contains a water-soluble calcium phosphate and a solid impurity-containing phase, in separating said phases, transferring calcium ions to a liquid phase by a strong base ions associated with forming the aqueous solution of the pure phosphate(s) of said strong base and in precipitating a pure water-insoluble calcium phosphate. Said method also consists in mixing phosphoric ores and acid in such a way that a pasty triple superphosphate composition is obtained and in adding water thereto in order to produce said pulp.

Process and installation for the preparation of ammonium polyphosphate

To produce essentially water-insoluble, chain-form ammonium polyphosphate from equimolar amounts of diammonium phosphate and phosphorus pentoxide in the presence of ammonia at temperatures of 170 to 350 DEG C with continuous mixing, kneading and comminution, diammonium phosphate and phosphorus pentoxide are at least partly replaced by partially ammoniated polyphosphoric acid. <??>An installation for carrying out this process can be composed of a sealed reactor (1), which is provided with metering devices (2,3) and feed tubes (4,5) for phosphorus pentoxide and diammonium orthophosphate, an ammonia feed tube (8), an ammonium polyphosphate discharge tube (9) and also with a pipe for waste gas. In the interior of the reactor (1), rotatable mixing, kneading and comminution tools are mounted. Furthermore, a heatable stirrer container (11), into which polyphosphoric acid can be passed via a feed pipe (13), is provided, with the aid of which steam and ammonia can be eliminated from the waste gas flowing to the reactor (1) via the pipe (20) and from which partially ammoniated polyphosphoric acid may be introduced into the reactor (1) via an outlet pipe (17). <IMAGE>

Способ получения устойчивого к гидролизу полифосфата аммония

Изобретение относится к технологии получения устойчивого к гидроэилу полифосфата аммония общей формулы H(, Зш-л где п 20-800, , и может быть использовано в области получения добавок для придания огнестойкости полиуретанам, пенополиуретанам , а также материалам, со- ;держащим целлюлозу, различным сортам бумаги, картону и т. п. Цель изобретения- повышение устойчивости к гидролизу при 60 С. Способ получения устойчивого к гидролизу полифосфата аммония заключается в его обработке меламинофор- мальдегидной смолой в среде метанола при 80-180 0 в течение 0,25-4,00 ч в замкнутом объеме с последующими охлаждением реакционной смеси, отделением метанола и сушкой продукта. Обработку ведут при массовом соотношении полифосфата аммония, метанола и меламиноформальдегидной смолы соответственно 1 : 1 ,5:0, 1 . 2 табл. СО 00 со со ГО N3 00 ...

Verfahren zur Herstellung kettenfoermig kondensierter Ammoniumphosphate

Verfahren zur Herstellung von Ammoniumsalzen der Phosphorsaeure,insbesondere von Diammoniumphosphat

Ammonium poly:phosphate with low solubility used as flame resistant agent

Ammonium polyphosphate is mfd. by the reaction of P4O10 with ammonium orthophosphate under an NH3 contg. atmos. at a temp. of 250-320 deg C until the reaction mixt. changes to a solid crumbly prod. It is then reheated for < 120 mins., under an NH3 contg. atmos., with agitation, at 250-320 deg C and passed to an area where it is cooled, with agitation, for a period of \- 20 mins.

Verfahren zur Herstellung von festem kristallisiertem Monoalkaliphosphat, insbesondere Ammoniumphosphat

Verfahren zur Herstellung von kristallisiertem neutralem Ammoniumpyrophosphat

VERFAHREN UND VORRICHTUNG ZUR KONTINUIERLICHEN HERSTELLUNG EINER SCHMELZE KONDENSIERTER AMMONIUMPHOSPHATE

CHAIN AMMONIUM POLYPHOSPHATES, SUBSTANTIALLY WATER-INSOLUBLE, AND METHOD FOR THEIR PRODUCTION

Method for the production of solid di-ammonium phosphate from impure phosphoric acid

In obtaining solid diammonium phosphate by neutralizing phosphoric acid with ammonia in two steps, neutralization to the mono-stage or a little higher, for example, to a pH value of about 5, is so effected that the heat of the reaction is utilized for partial evaporation of the water, a temperature of over 100 DEG C. being obtained. Impurities precipitated, chiefly as phosphates, are removed by filtration or centrifuging, and the monoammonium phosphate solution is further neutralized in a closed vessel, while being stirred and cooled say to 70-80 DEG C. When a pH value of 8 is reached, corresponding to completion of the reaction to the diammonium stage, the solution is sprayed into a current of warm air, with which may be admixed a small quantity of ammonia. The temperature should not rise above 70 DEG C. The dried salt should be quickly cooled to room temperature. The ammonia should be recovered from the drying air by absorption in acid, for example, the phosphoric acid to be converted ...

Production of phosphoric acid and alkali metal and ammonium phosphates

Phosphoric acid, or alkali metal, or ammonium, phosphates are prepared by burning elemental phosphorus adjacent the top of a thin-walled, unlined, corrosion-resistant metal tower, absorbing the resulting phosphorus pentoxide in a thin film of an aqueous solution of phosphoric acid, alkali metal, or ammonium, carbonate or hydroxide covering the walls of the tower from top to bottom, removing the resulting solution from the tower, and recirculating part of the solution. With phosphoric acid, the walls of the tower must be maintained at 60-70 DEG C. by external cooling, to avoid corrosion, but with the alkali metal, or ammonium, phosphate solutions the walls are maintained below 100 DEG C. by evaporating water from the solution in the tower. Molten phosphorus from 3 is atomized with air from 4 in burner 2 and burned with air entering dome 9 at 5. Dome 9 has inside and outside cooling water sprays 26, 25 and dam 27 to form a pool. Phosphoric acid, say 75 per cent, is fed ...

PROCESS FOR CARRYING OUT A CHEMICAL REACTION

Improvements in method and apparatus for ammoniation of phosphoric acid

Diammonium phosphate is made by continuously introducing phosphoric acid and ammonia gas into a reaction chamber, in which a constant pressure is maintained, withdrawing the ammonium phosphate and collecting in the upper part of the chamber the mixture of steam and ammonia which is evolved, from which the ammonia is separated by condensation and, if desired, by distillation, and recycled to the chamber after addition of fresh ammonia equal to the amount used in the reaction, the respective quantities of phosphoric acid and ammonia continuously introduced into the chamber being maintained constant, and the partial pressure of ammonia gas in the chamber sufficing to prevent decomposition of the diammonium phosphate formed. As shown, phosphoric acid from vat 2 is supplied through a measuring device 7 and siphon 12 to a saturator 6 into which hot ammonia gas is passed from pipe 20 and the hot paste which is formed is withdrawn through pipe 13, granulated and dried. Steam ...

Ammonium salts and fertilisers based thereon

... The invention comprises a process for making ammonium nitrate or mixtures of ammonium salts containing ammonium nitrate wherein in a first stage a liquid mixture containing ammonium nitrate and nitric acid is formed or an acid mixture containing ammonium nitrate and at least one of ammonium sulphate and ammonium phosphate is formed in the liquid phase, and wherein in a second stage the product from the first stage is treated in the liquid phase at an elevated temperature with a countercurrent stream of ammonia gas, the second stage being operated so that the water vapour evaporated as a result of treating the product from the first stage with ammonia gas is removed out of contact with the mixture being treated with ammonia in the second stage at a point where the pH of the liquid phase is the same as that of the product from the first stage, and if any water vapour is separated in the first stage this is done at a similar pH to that at which water vapour is separated ...

PRODUCTION OF AMMONIUM PHOSPHATES

... 1,218,997. Ammonium phosphates. FREEPORT SULPHUR CO. 20 Nov., 1968 [20 Feb., 1968], No. 65094/68. Heading C1A. Ammonium phosphates are prepared by a continuous process comprising converting phosphate rock to phosphoric acid by treatment with sulphuric acid, the phosphoric acid obtained then being used after concentration, if necessary, as an aqueous solution containing from 20% to 85% by weight of P 2 O 5 for treatment with an ammonium sulphate of formula (NH 4 ) x H 2-x SO 3 where x is from 1 to 2, to produce an ammonium phosphate, the sulphur dioxide produced as by-product being converted to sulphuric acid by catalytic reaction with air and water and returned to convert additional phosphate rock to phosphoric acid. The sulphite is preferably mono-ammonium sulphite or di-ammonium sulphite. Depending on the composition of the starting materials and the stoichiometry employed mono-ammonium phosphate, diammonium phosphate or mixtures thereof, may be obtained from the system.

Improvements in the manufacture and production of di-ammonium phosphate

... 256,137. Johnson. J. Y., (I. G. Farbenindustrie Akt.-Ges.). Feb. 22, 1926. Ammonium phosphate.-In the production of di-ammonium phosphate by the interaction of ammonia and phosphoric acid a ratio of 1 molecule of phosphoric acid to 1.5-2 molecules of ammonia is maintained, the further additional quantity of ammonia when required being introduced during or after cooling the solution. Phosphoric acid may be added to a solution of diammonium phosphate until the ratio of 1 molecule of phosphoric acid to 1.5 molecules of ammonia is obtained and ammonia and phosphoric acid and then introduced in the same ratio. Water is evaporated owing to the heat of neutralization and when the solution is sufficiently concentrated it is withdrawn continuously or at intervals. After cooling, ammonia is added to precipitate the di-ammonium phosphate. When stronger phosphoric acid is used, to avoid too high a temperature aqueous ammonia may be introduced with the phosphoric acid. Heat may be supplied when weak ...

Mono- or di-ammonium phosphate, or mixtures of these, with or without other ammonium salts, are obtained by treating crystallized tri-ammonium phosphate with a strong solution of an acid, e.g. phosphoric, sulphuric, hydrochloric, or nitric acid. In the examples, (1) triammonium phosphate is mixed with phosphoric acid containing 50 per cent of P2O5 until the product is neutral to phenolphthalein. The product is dried in vacuo at 60 DEG C., or the solid di-ammonium phosphate may be separated from the saturated aqueous solution by centrifuging or by filtration. (2) Nitric acid is substituted for the phosphoric acid used in Ex. (1). A mixture of ammonium nitrate and di-ammonium phosphate is obtained. (3) Hydrochloric acid is substituted for the phosphoric acid used in Ex. (1). A mixture of ammonium chloride and di-ammonium phosphate is obtained. (4) Mono-ammonium phosphate mixed with neutral ammonium sulphate is obtained by treating triammonium phosphate with sulphuric acid in the molecular ...

CONTROLLED REACTION SYSTEMS

... 1319182 Gas/liquid contact PARKSON CORP 19 April 1971 [9 Feb 1970] 21136/71 Heading B1F [Also in Division C1] A method of chemically reacting a gas and a liquid comprises continuously injecting the gas into a confined stream of the liquid flowing at a controlled rate, passing the gasliquid mixture through a tortuous flow path comprising parallel passes within a plate-type reactor to induce turbulence, controlling the temperature and pressure within the flow path to effect complete reaction, and removing the product from the flow path. Figs. 2, 3, 4 illustrate alternative plate reactors for the ammoniation of phosphoric acid, indicated diagrammatically as 12 in Fig. 1. In Fig. 2 phosphoric acid of 32-72% P 2 O 5 content enters preheat zone 15 at line 11 and takes a flow path comprised by adjacent parallel passes 13 between plates 14, steam being supplied through three alternate passes 16 to heat the walls of the two intervening passes 13. Optionally the acid may be partially pre-ammoniated ...

Procedure for the production of granular, ammonium phosphate containing Düngemiteln

Procedure for the production of chain-shaped ammonium polyphosphates

Procedure for the production of chain-shaped ammonium polyphosphates

Procedure for the production of chemical products and device for its execution

PROCEDURE FOR THE PRODUCTION OF AMMONIUM POLYPHOSPHATE, WHICH RESULTS IN A LOW VISCOSE RAYON WAESSRIGE SUSPENSION.

Procedure for the production of primary orthophosphates of the alkali metals, the ammonium or the calcium

PURIFICATION OF WET PROCESS PHOSPHORIC ACID

PROCESS FOR AMMONIATING WET PROCESS PHOSPHORIC ACID

PHOSPHATE SALTS

LIQUID CLEANING COMPOSITIONS

MANUFACTURE OF WATER-INSOLUBLE AMMONIUM POLYPHOSPHATE

Title: MANUFACTURE OF WATER-INSOLUBLE AMMONIUM POLYPHOSPHATE Preparation of crystalline waterinsoluble ammonium polyphosphate through processing a melt of urea and phosphoric acid or alternatively processing solid urea phosphate. Contact between the exiting product and recycled gaseous by-products ensures proper pH.

PROCESS AND PLANT FOR THE PREPARATION OF AMMONIUM POLYPHOSPHATE

HOE 90/H 021 Process and plant for the preparation of ammonium polyphosphate of the disclosure: To prepare essentially water-insoluble, chain-form ammonium polyphosphate from equimolar amounts of diammonium phosphate and phosphorus pentoxide in the presence of ammonia at temperatures of from 170 to 350.degree.C with constant mixing, kneading and comminution, at least some of the diammonium phosphate and phosphorus pentoxide is replaced by partially ammoniated polyphosphoric acid. A plant for carrying out this process can comprise a sealed reactor (l) which is provided with metering devices (2, 3) and feed tubes (4, 5) for phosphorus pentoxide and diammonium orthophosphate, an ammonia feed tube (8), an ammonium polyphosphate discharge tube (9) and a line for offgas. Rotatable mixing r kneading and comminution elements are provided inside the reactor (1). Furthermore, a heatable stirred tank (11) which can be charged with polyphosphoric acid via a feed line (13) is provided and can be used ...

Method for producing strong base phosphates

PROCESS Of OBTAINING PHOSPHATIC SOLUTIONS FREE FROM FLUORINE AND SOLUTIONS THUS OBTAINED

PRODUCTION OF AMMONIUM POLYPHOSPHATES

ABSORBER-CRYSTALLIZER

Manufacture of acid phosphoric or certain phosphates starting from a lead phosphate

METHOD OF PRODUCING A NEUTRAL AMMONIUM POLYPHOSPHATE

Process of reaction of orthophosphoric acid and ammonia under pressure and ammonia-bearing phosphate-enriched fertilizers obtained by this process

MIXTURES OF AMMONIUM POLYPHOSPHATE AND AT LEAST ONE SOLUBLE IONIC COMPOUND CONTAINING SULFATE AND/OR IS CAPABLE OF RELEASING SULFATE IONS

The invention relates to mixtures containing, as component (A) ammonium polyphosphate and, as component (B) a soluble ionic compound which contains sulfate and/or is capable of releasing sulfate ions. The invention also relates to a method for producing such mixtures and to the use thereof. 1. A mixture comprising:as component (A) ammonium polyphosphate; andas component (B) a soluble ionic compound that contains sulfate and/or is capable of releasing sulfate ions.2. The mixture as claimed in claim 1 , wherein component (A) is an ammonium polyphosphate of the crystal form I claim 1 , II claim 1 , III claim 1 , IV claim 1 , V claim 1 , VI claim 1 , a branched ammonium polyphosphate or a mixture thereof.3. The mixture as claimed in claim 1 , wherein the ammonium polyphosphate (component A)) is one of the crystal form I claim 1 , II claim 1 , V or a mixture thereof.4. The mixture as claimed in claim 1 , wherein the ammonium polyphosphate (component (A)) is one of the formula (NH)POwith n≥2.5. The mixture as claimed in claim 1 , wherein the ammonium polyphosphate (component (A)) is one of the formula (NH)POwith n from 10 to 10 000.6. The mixture as claimed in claim 1 , wherein component (B) is selected from the group consisting of sulfates claim 1 , hydrogensulfates claim 1 , peroxomonosulfates claim 1 , peroxodisulfates claim 1 , sulfur trioxide claim 1 , sulfuric acid claim 1 , sulfur dioxide and mixtures thereof.7. The mixture as claimed in claim 1 , wherein component (B) is selected from the group consisting of potassium cations claim 1 , sodium cations claim 1 , calcium cations claim 1 , magnesium cations claim 1 , iron cations claim 1 , silver cations claim 1 , copper cations claim 1 , titanium cations claim 1 , zinc cations claim 1 , tin cations claim 1 , nitrogen-containing cations claim 1 , sulfonium cations claim 1 , carbocations claim 1 , phosphonium cations and mixtures thereof.8. The mixture as claimed in claim 7 , wherein the nitrogen-containing cations are ...

Method for preparation of graft modified ammonium polyphosphate with ultra-low hydroplaning and resistance to hydrolysis and application thereof

A method for preparation of graft modified ammonium polyphosphate with ultra-low hydroplaning and resistance to hydrolysis belongs to the field of the preparation of flame retardant. Ammonia water is used as hydrolytic agent of amino silane. In the early stage of synthesis of ammonium polyphosphate with phosphorus pentoxide, diammonium hydrogen phosphate and melamine as raw materials, hydrolyzed amino silane ammonia mixture is added, and continues warming reaction, when the temperature drops to a certain temperature, melamine is added to maintain high temperature reaction for a certain period of time, then cools to obtain graft modified ammonium polyphosphate with ultra-low hydroplaning and resistance to hydrolysis. The present disclosure grafts ammonium polyphosphate with two kinds of amino grafting in stages, and the modified ammonium polyphosphate products after grafted basically have no hydroplaning when meets water. Because of addition of excessive melamine in late stage, the excessive melamine is not only used for graft modified ammonium polyphosphate, but also used for reacting with acidic ammonium polyphosphate whose polymerization is incomplete, making it form polyphosphate melamine, eliminate the formation of water-soluble small molecules, and reduce water solubility of the products to a greater extent.

Polyphosphate and preparation method thereof

本发明公开了一种多磷酸盐及其制备方法，制备方法包括如下步骤：(1)制备料浆：将硝酸与磷矿按质量比(1.1～1.3)：1反应，得到料浆；(2)中和与蒸发：将料浆预热到90～130℃后与氨气按质量比为(15～25)：1加入至管式反应器中控制压力0.35～0.45MPa，温度206～230℃条件下反应得到料液；或者将磷酸、多聚磷酸预热到90～130℃后加入至管式反应器与氨气反应得到料液；(3)混合：将料液与氮肥、磷肥、钾肥、辅料及微量元素中的一种或几种混合得到混合物；(4)造粒：将步骤(2)的料液蒸发到含水量小于1.2％后直接造粒或(3)中的混合物混合后造粒得到多磷酸盐。本发明制备方法简单、成本低、效率高且多样。

Method of recovering ammonia

Producing nitrogen-phosphorus-potassium or nitrogen-phosphorus materials containing polyphosphates

FIELD: chemistry. ^ SUBSTANCE: nitrogen-phosphorus-potassium (NPK) or nitrogen-phosphorus (NP) material from nitrophosphate process contains at least 5 wt % condensed phosphates (polyphosphates), preferably at least 8% and more preferably at least 10 wt % phosphates in form of condensed phosphates (polyphosphates). The total amount of phosphorus-containing compounds in NPK or NP material contains 50-95 wt % water-soluble phosphates and more than or equal to 93 wt % citrate-soluble phosphates. The method of producing nitrogen-phosphorus-potassium (NPK) or nitrogen-phosphorus (NP) material involves a step (1) for decomposing apatite in nitric acid, a step (2) for crystallisation on which temperature is controlled in a range from -10 to +10C, a step for filtering calcium nitrate, a step (3) for neutralisation with ammonia, a step (4) for evaporation and a step for adding potassium after step (4). Pressure is lowered at step (4) for evaporation such that content of water in the evaporated NP liquid is approximately less than or equal to 1.0 wt %. Temperature is raised at step (4), and controlled at step (2) for crystallisation, which results in formation of polyphosphate. ^ EFFECT: invention enables to obtain solid NPK fertiliser containing polyphosphates. ^ 19 cl, 7 tbl, 4 ex, 1 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 439 039 (13) C2 (51) МПК C05B 11/06 C05B 13/06 (2006.01) (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2009124418/13, 28.11.2007 (24) Дата начала отсчета срока действия патента: 28.11.2007 (72) Автор(ы): ОБРЕСТАД Торстен (NO), ОКСВИК Арне (NO) (73) Патентообладатель(и): ЯРА ИНТЕРНЕЙШНЛ АСА (NO) R U Приоритет(ы): (30) Конвенционный приоритет: 05.12.2006 NO 20065594 (43) Дата публикации заявки: 20.01.2011 Бюл. № 2 2 4 3 9 0 3 9 (45) Опубликовано: 10.01.2012 Бюл. № 1 2 4 3 9 0 3 9 R U (85) Дата начала рассмотрения заявки PCT на национальной фазе: 06.07.2009 C 2 C 2 (56) Список документов, ...

Plant for production of ammonium polyphosphate

FIELD: inorganic chemistry. SUBSTANCE: plant for production of ammonium phosphate has reactor accommodating mixing, puddling and grinding tools and pipeline for supply of solid starting substances, ammonium charging pipelines, gas discharge pipeline, reaction product discharge pipeline; all are communicated with reactor internal space. Reactor discharging pipeline is connected with mixing apparatus in direction of material flow. Locking member is installed in discharge pipeline and controlled by current consumed by reactor drive motor. EFFECT: higher efficiency. 9 cl, 2 dwg, 1 tbl 9799 0Сс ПЧ Го РОССИЙСКОЕ АГЕНТСТВО ПО ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (19) (51) МПК ВИ “” 2025 465 ' 13) СЛ С 01В 25/40, 15/16 12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ (21), (22) Заявка: 4894639/26, 04.03.1991 (30) Приоритет: 05.03.1990 ОЕ Р 4006862.5 (46) Дата публикации: 30.12.1994 (56) Ссылки: Патент США М 3978155, кл. С 01В 15/16, 1976. (71) Заявитель: Хехст АГ (0Е) (72) Изобретатель: Томас Штаффель[РЕ], Гюнтер Шиммель[ОЕ],‚, Хорст Бул ОЕ], Юрген Гросе[рЕ] (73) Патентообладатель: Хехст АГ (0Е) (54) УСТАНОВКА ДЛЯ ПОЛУЧЕНИЯ ПОЛИФОСФАТА АММОНИЯ (57) Реферат: Использование: получение цепного полифосфата аммония из ортофосфата аммония и пятиокиси фосфора в присутствии газообразного аммиака. Сущность: установка содержит реактор с находящимися внутри нег вращающимися — смесительными, месительными и измельчающими инструментами и подводящим трубопроводом для твердых исходных веществ, загрузочной трубопровод для аммиака, газоотводящий трубопровод, разгрузочный трубопровод для продукта реакции, соединенные с внутренним пространством реактора. — Разгрузочный трубопровод реактора соединен В направлении потока материала С смесительным аппаратом. В разгрузочном трубопроводе установлен запорный орган, управляемый —потребляемым — током приводного двигателя реактора. 8 з.п. ф-лы, 2 ил, 1 табл. 2025465 С1 КО 9799 0Сс ПЧ Го КУЗЗАМ АСЕМСУ ГОК РАТЕМТ$ АМО ТКАОЕМАКК$ (19) ВО"? 2025 465 “°С1 (51) ...

Preparation method and application for grafted modified ammonium polyphosphate with ultralow water sliding property and hydrolysis resistance

本发明公开了一种超低水滑性耐水解接枝改性聚磷酸铵的制备方法，氨水作为氨基硅烷水解剂，在以五氧化二磷，磷酸氢二胺，三聚氰胺为原料合成聚磷酸铵的初期，加入水解后的氨基硅烷氨水混合物，再继续升温反应，在温度降至特定温度下，加入三聚氰胺维持高温反应一定时间，降温得到超低水滑耐水解接枝改性聚磷酸铵。本发明采用两种含氨基接枝物分阶段对聚磷酸铵进行更彻底接枝，接枝后的改性聚磷酸铵产品遇水基本无水滑现象，由于后期加入过量的三聚氰胺，致使除用于接枝改性聚磷酸铵之外，还与聚合不完全的酸性聚磷酸铵反应，使之形成聚磷酸三聚氰胺盐，杜绝了水溶性小分子的产生，更大程度降低了产品的水溶性。

Method for preparating hydrolysis-resistant grafted modified ammonium polyphosphate having ultra-low water slipperiness, and application thereof

A method for preparing a hydrolysis-resistant grafted modified ammonium polyphosphate having ultra-low water slipperiness, relating to the field of the preparation of flame retardant agents. Using aqueous ammonia as an aminosilane hydrolytic agent, and then adding the hydrolysed aminosilane and aqueous ammonia mixture during the initial phase of synthesising ammonium polyphosphate using the raw materials of phosphorus pentoxide, diammonium hydrogen phosphate, and melamine; continuing to heat the reaction, and when the temperature drops to below a specific temperature, adding melamine and continuing to react under a high temperature for a specific duration; and lowering the temperature to obtain hydrolysis-resistant grafted modified ammonium polyphosphate having ultra-low water slipperiness. As thorough grafting of the ammonium polyphosphate is implemented in separate stages using two grafting materials containing amino groups, the grafted modified ammonium polyphosphate product is not slippery on contact with water; and as excess melamine is added at a later stage, used not only for grafting modified ammonium polyphosphate, but also for reacting with incompletely polymerised acidic ammonium polyphosphate, polyphosphoric acid melamine salt is formed, preventing the production of water-soluble small molecules, and greatly reducing the water solubility of the product.

PROCEDURE FOR THE MANUFACTURE OF SOLID AMMONIC POLYPHOSPHATE IN CRYSTALLINE FORM II.

PROCEDIMIENTO PARA LA FABRICACION DE POLIFOSFATO AMONICO SOLIDO DE FORMA CRISTALINA II. PARA LA FABRICACION DE POLIFOSFATOS AMONICOS DE CADENA LARGA (FORMA CRISTALINA II) SE LLEVA A CABO UNA REACCION A UNA TEMPERATURA COMPRENDIDA ENTRE 180º Y 200º UTILIZANDO COMO MATERIAS PRIMAS PENTOXIDO DE FOSFORO (P205), ORTOFOSFATO DIAMONICO ((NHS4)2HPO4) Y SULFATO AMONICO ((NH4)2SO4) EN UNA ATMOSFERA DE AMONIACO GAS (NH3). EL PROCEDIMIENTO AQUI DESCRITO PERMITE OBTENER UN PRODUCTO QUE UNA VEZ ENFRIADO Y MOLTURADO SE CARACTERIZA POR TENER: A) UNA SOLUBILIDAD EN AGUA A 25º MENOR DE 0,4 G POR 100 ML DE SUSPENSION. B) UNA VISCOSIDAD MAXIMA EN SUSPENSION ACUOSA AL 10% EN PESO DE 40 CP (A 25º C). C) UNA VISCOSIDAD MAXIMA EN SUSPENSION EN POLIESTER LINEAL AL 30% EN PESO DE 35 X 103 CP (A 25º C). EL POLIFOSFATO OBTENIDO POR ESTE PROCEDIMIENTO MEJORA DE FORMA NOTABLE LAS CARACTERISTICAS DE OTROS PRODUCTOS ACTUALMENTE EN EL MERCADO, CONSIDERANDOSE SATISFACTORIO PARA SUS APLICACIONES EN PINTURAS INTUMESCENTES E IGNIFUGACION DE PLASTICOS. PROCEDURE FOR THE MANUFACTURE OF SOLID AMMONIC POLYPHOSPHATE IN CRYSTALLINE FORM II. FOR THE MANUFACTURE OF LONG CHAIN AMMONIC POLYPHOSPHATES (CRYSTALLINE II FORM), A REACTION IS CARRIED OUT AT A TEMPERATURE COMPRISING BETWEEN 180 AND 200 DEGREES USING PHOSPHORINE PENTOPHYZIDE (P205), DIAMONIC SULPHONIC (P205) ((NH4) 2SO4) IN AN AMMONIA GAS ATMOSPHERE (NH3). THE PROCEDURE HERE DESCRIBED ALLOWS TO OBTAIN A PRODUCT WHICH, ONCE COOLED AND MOLTURED, IS CHARACTERIZED BY HAVING: A) A SOLUBILITY IN WATER AT 25º LESS THAN 0.4 G PER 100 ML OF SUSPENSION. B) A MAXIMUM VISCOSITY IN 10% AQUEOUS SUSPENSION IN WEIGHT OF 40 CP (AT 25º C). C) A MAXIMUM VISCOSITY IN SUSPENSION IN LINEAR POLYESTER AT 30% IN WEIGHT OF 35 X 103 CP (A 25º C). THE POLYPHOSPHATE OBTAINED BY THIS PROCEDURE IMPROVEDLY IMPROVES THE CHARACTERISTICS OF OTHER PRODUCTS CURRENTLY ON THE MARKET, CONSIDERING THEMSELVES SATISFACTORY FOR ITS APPLICATIONS IN INTUMESCENT PAINTINGS AND PLASTIC IGNIFUGATION.

Fertilizer compositions

1,221,791. Mixtures of ammonium nitrate and ammonium phosphate. FISONS FERTILIZERS Ltd. 4 July, 1968 [25 July, 1967], No. 34002/67. Headings C1A and C1B. Molten mixtures of ammonium nitrate and ammonium phosphate are prepared by reacting, in a first stage, phosphoric and/or nitric acid with gaseous or aqueous ammonia in the presence of nitrate and phosphate ions, the ammonia being in an amount in excess of that which can be absorbed by the reaction mixure; and contacting, in a second stage, the ammonia which is not absorbed in the first stage in further nitric and/or phosphoric acid which is intended for use in the first stage, both stages being carried out at sub-atmospheric pressure, and at the boiling point of the materials of that stage. The pressure may be 25-250 mm. Hg. The ammonium phosphate produced has an N: P ratio of 0.9 : 1 to 1.8 : 1, and the mixture may have an N: P 2 O 5 ratio of 1: 2 to 3 : 1. The amount of water added in the first stage is preferably 10-20% by wt., based on the total weight of materials fed to this stage. The reaction may be between ammonia and phosphoric acid, nitrate ions being added as ammonium nitrate, when the phosphoric acid used may be from 30-55% P 2 O 5 by wt. The molten mixtures may be granulated, prilled or flaked for use as a fertilizer, when potassium salts, e.g. KCl, K 2 SO 4 ; ammonium sulphate, urea or trace elements may be added.

WET PHOSPHORIC ACID PURIFICATION PROCESS

L'invention concerne un procédé de purification d'acide phosphorique de voie humide. On chauffe l'acide phosphorique obtenu par voie humide de préférence dans un récipient en carbone 1 et en faisant passer un courant électrique alternatif à travers l'acide 10 pour avoir des concentrations supérieures à 76 % en P2 O5 et de préférence à des températures supérieures à 500 degrés C pour éliminer les sulfates et fluorures et transformer la matière organique et les impuretés basiques en un précipité filtrable. L'acide séparé du précipité fournit un produit cristallisable de pureté élevée. The invention relates to a method for the wet purification of phosphoric acid. The phosphoric acid obtained is heated by wet process preferably in a carbon 1 container and by passing an alternating electric current through the acid 10 to have concentrations greater than 76% of P2 O5 and preferably at higher temperatures. at 500 degrees C to remove sulfates and fluorides and convert organic matter and basic impurities into a filterable precipitate. The acid separated from the precipitate provides a crystallizable product of high purity.

Ammonisation of phosphoric and nitric acids - for fertilisers

In a modification of the parent process nitric and phosphoric acids (contg. polyphosphoric acids) are ammoniated with a min. loss of polyphosphoric acid by feeding streams of nitric and phosphoric acid and ammonia continuously into a reactor, the amount of ammonia used being less than that reqd. to neutralise the acid and conditions being such that the prod. is a liquid reaction mixture and steam separating the two phases, cooling the liquid mixture and neutralising with ammonia. The product contains a high N:P2O5 ratio and a high proportion of polyphosphates.

Manufacturing process of ammonium phosphates with high ammonia content

Process for manufacturing solid ammonium phosphates

PROCESS FOR OBTAINING PHOSPHATIC SOLUTIONS FREE OF FLUORINE AND THE SOLUTIONS THUS OBTAINED

Process for the simultaneous manufacture of ammonia phosphate and a calcium salt, for example nitrate

METHOD FOR PRODUCING STRONG BASIC PHOSPHATES

ÐÎÑÑÈÉÑÊÀß ÔÅÄÅÐÀÖÈß RU (19) (11) 2006 126 681 (13) A (51) ÌÏÊ C01B 25/28 (2006.01) ÔÅÄÅÐÀËÜÍÀß ÑËÓÆÁÀ ÏÎ ÈÍÒÅËËÅÊÒÓÀËÜÍÎÉ ÑÎÁÑÒÂÅÍÍÎÑÒÈ, ÏÀÒÅÍÒÀÌ È ÒÎÂÀÐÍÛÌ ÇÍÀÊÀÌ (12) ÇÀßÂÊÀ ÍÀ ÈÇÎÁÐÅÒÅÍÈÅ (21), (22) Çà âêà: 2006126681/15, 23.12.2004 (71) Çà âèòåëü(è): ÝÊÎÔÎÑ (BE) (30) Êîíâåíöèîííûé ïðèîðèòåò: 24.12.2003 BE 2003/0682 (72) Àâòîð(û): ÒÀÊÈÌ Ìîõàìåä (BE) (43) Äàòà ïóáëèêàöèè çà âêè: 27.01.2008 Áþë. ¹ 3 (87) Ïóáëèêàöè PCT: WO 2005/066071 (21.07.2005) Àäðåñ äë ïåðåïèñêè: 103735, Ìîñêâà, óë.Èëüèíêà, 5/2, ÎÎÎ "Ñîþçïàòåíò", ïàò.ïîâ. Î.È.Âîëü, ðåã. ¹ 1101 R U (57) Ôîðìóëà èçîáðåòåíè 1. Ñïîñîá ïîëó÷åíè ñèëüíîîñíîâíûõ ôîñôàòîâ, âêëþ÷àþùèé: ôîðìèðîâàíèå ïóëüïû, ñîñòî ùåé èç âîäíîé ôàçû, ñîäåðæàùåé âîäîðàñòâîðèìûé ôîñôàò êàëüöè â âèäå èîíîâ êàëüöè è èîíîâ ôîñôàòà, è òâåðäîé ôàçû, ñîäåðæàùåé ïðèìåñè; ðàçäåëåíèå óêàçàííîé æèäêîé ôàçû è óêàçàííîé òâåðäîé ôàçû; îñóùåñòâëåíèå çàìåùåíè èîíîâ êàëüöè èîíàìè ñèëüíîãî îñíîâàíè â ïîëó÷åííîé â ðåçóëüòàòå óêàçàííîãî ðàçäåëåíè æèäêîé ôàçå ñ îáðàçîâàíèåì âîäíîãî ðàñòâîðà ôîñôàòà(îâ) óêàçàííîãî ñèëüíîãî îñíîâàíè è îñàæäåíèåì íå ðàñòâîð þùåãîñ â âîäå ôîñôàòà êàëüöè è âûäåëåíèå îñàæäåííîãî ôîñôàòà êàëüöè èç âîäíîãî ðàñòâîðà ñèëüíîîñíîâíîãî(ûõ) ôîñôàòà(îâ), îòëè÷àþùèéñ òåì, ÷òî ýòàï ôîðìèðîâàíè óêàçàííîé ïóëüïû ñîäåðæèò: ñìåøèâàíèå ôîñôàòíîé ðóäû è ôîñôîðíîé êèñëîòû äë îáðàáîòêè òàêèì îáðàçîì, ÷òîáû ïîëó÷èòü òåñòîîáðàçíóþ êîìïîçèöèþ òðîéíîãî ñóïåðôîñôàòà; è äîáàâëåíèå âîäû â ïîëó÷åííóþ êîìïîçèöèþ òðîéíîãî ñóïåðôîñôàòà. 2. Ñïîñîá ïî ï.1, îòëè÷àþùèéñ òåì, ÷òî óêàçàííûé ýòàï ôîðìèðîâàíè ñîäåðæèò ñóøêó êîìïîçèöèè òðîéíîãî ñóïåðôîñôàòà è, â ñëó÷àå íåîáõîäèìîñòè, åå ñêëàäèðîâàíèå ìåæäó óêàçàííûì ýòàïîì ñìåøèâàíè è ýòàïîì äîáàâëåíè âîäû. 3. Ñïîñîá ïî ï.1 èëè 2, îòëè÷àþùèéñ òåì, ÷òî ôîñôîðíà êèñëîòà ñîäåðæèò P2O3 îò 30 äî 50% ïî ìàññå, ïðåäïî÷òèòåëüíî îò 35 äî 40% ïî ìàññå. 4. Ñïîñîá ïî ï.1, îòëè÷àþùèéñ òåì, ÷òî ïóëüïà íà ýòàïå ôîðìèðîâàíè èìååò ðÍ îò 1,2 äî 3,2, ïðåäïî÷òèòåëüíî îò 2 äî 3 è åùå ïðåäïî÷òèòåëüíåå 2,5. Ñòðàíèöà: 1 RU A 2 0 0 6 1 2 6 6 8 1 ...

Phosphates manufacturing process

Manufacturing process of di-ammonium phosphate

Process for the separation of mixtures of phosphoric and nitric or hydrochloric acids

Process for manufacturing monoammonium phosphate and other products from crude phosphate

Process for the separation of mixtures of phosphoric and nitric or hydrochloric acids.

Composition for fire fighting, corrosion inhibited

PROCESS FOR THE CONTINUOUS PREPARATION OF A FUSED MASS OF CONDENSED AMMONIUM PHOSPHATES AND DEVICE FOR CARRYING OUT SAID METHOD

L'INVENTION CONCERNE UN PROCEDE POUR LA PREPARATION CONTINUE DE PHOSPHATES D'AMMONIUM CONDENSES ET UN DISPOSITIF UTILISABLE POUR LA MISE EN OEUVRE DE CE PROCEDE. ON EFFECTUE CETTE PREPARATION PAR UNE REACTION DE NEUTRALISATION-DESHYDRATATION ENTRE UNE PHASE LIQUIDE CONTENANT DU PHOSPHORE ET UNE PHASE GAZEUSE CONTENANT DE L'AMMONIAC DANS UN REACTEUR VERTICAL A COUCHE MINCE. LE CORPS 1 DU REACTEUR COMPORTE AU MOINS UN FOND DE SUPPORT 2 SUR LEQUEL EST PLACE UN GARNISSAGE ORGANISE ETOU NON ORGANISE 3. DES CONDITIONS SPECIFIEES DOIVENT ETRE RESPECTEES CONCERNANT LE RAPPORT ENTRE LE DIAMETRE EQUIVALENT DES PARTICULES DU GARNISSAGE ET LE DIAMETRE DU CORPS DU REACTEUR, LA POROSITE DU GARNISSAGE ET LE RAPPORT ENTRE LA HAUTEUR TOTALE DU GARNISSAGE ET LE DIAMETRE INTERIEUR DU CORPS DU REACTEUR. APPLICATION A LA PRODUCTION D'ENGRAIS. THE INVENTION RELATES TO A PROCESS FOR THE CONTINUOUS PREPARATION OF CONDENSED AMMONIUM PHOSPHATES AND TO A DEVICE THAT CAN BE USED FOR CARRYING OUT THIS PROCESS. THIS PREPARATION IS CARRIED OUT BY A NEUTRALIZATION-DEHYDRATION REACTION BETWEEN A LIQUID PHASE CONTAINING PHOSPHORUS AND A GASEOUS PHASE CONTAINING AMMONIA IN A VERTICAL THIN LAYER REACTOR. THE REACTOR BODY 1 CONTAINS AT LEAST A SUBSTRATE 2 ON WHICH IS PLACED AN ORGANIZED AND OR NON-ORGANIZED PADDING 3. SPECIFIED CONDITIONS MUST BE FOLLOWED CONCERNING THE RELATIONSHIP BETWEEN THE EQUIVALENT DIAMETER OF THE PARTICLES OF THE PADDING AND THE DIAMETER OF THE REACTOR BODY, THE POROSITY OF THE LINING AND THE RELATION BETWEEN THE TOTAL HEIGHT OF THE LINING AND THE INSIDE DIAMETER OF THE REACTOR BODY. APPLICATION TO THE PRODUCTION OF FERTILIZERS.

Patent FR2257542A1

A method of preparing crystal II-type ammonium polyphosphate by condensing agent of thiocarbamide

本发明涉及一种以硫脲为缩合剂来制备结晶Ⅱ型聚磷酸铵的新方法，包括有以下步骤：将磷酸二氢铵和硫脲混合均匀，加热使原料经过熔融、发泡、固化过程；粉碎，继续升温至并搅拌，不断用干空气置换反应产生的硫化物气体；继续加热，通入湿氨气，并不断进行搅拌，氨化使其晶型转化，得到产品，之后在相同的湿氨气气氛保护下降温至室温，粉粹、研磨得到结晶Ⅱ型聚磷酸铵。本发明的有益效果如下：本发明结晶Ⅱ型聚磷酸铵的制备过程简单，原料易得，成本较低，工艺易于实现；以硫脲为缩合剂，其在同等条件下与尿素为缩合剂得到最佳工艺，投料较少不会有很多其他副产物如三聚氰胺，所以产品纯度较其较高，腐蚀性较小。

CLEANING OF PHOSPHORIC ACID PRODUCED BY THE WET DIGESTION PROCESS

Process for producing ammonium polyphosphate which gives a low-viscosity aqueous suspension

Process for producing ammonium polyphosphate which gives a low-viscosity aqueous suspension Abstract of the disclosure A process for producing essentially water-insoluble, chain-type ammonium polyphosphates of the general formula (NH4PO3)n, in which n is a number from 10 to 1,000, whose 20% by weight aqueous suspension prepared at 60°C has a viscosity of less than 100 mPa.s at 20°C, is indicated, which comprises allowing a reaction mixture of ammonium orthophosphate and phosphorus pentoxide to react fully at a high mixing intensity in a crumbly phase at a tempera-ture from 100 to 300°C over a period of from 10 to 60 minutes and then heat-treating the reaction material in a known manner over a period of from 50 to 200 minutes at a temperature from 200 to 300°C under an ammonia atmos-phere. Advantageously, the reaction is carried out in a kneader.

Manufacturing process of ammonium perchlorate and ammonia sodium phosphate

Mono-and di-ammonium phosphate prodn inimproved yield

Process for making mono or di-ammonium phosphate according to the parent patent gives better yields when an ammonium salt is added to the mixture of solvent and crude phosphoric acid solution at the extraction stage. In an example various amounts of crude phosphoric acid were partitioned between water and isobutanol, in the presence or absence of 15% NH4NO3, and the partition coefficients calculated. In all cases more P2O5 went into the solvent when NH4NO3 was present.

Process for preparing substantially dry crystalline diammonium phosphate

The production of quaternary ammonium polyphosphates

Quaternary ammonium polyphosphates, wherein the anions are substantially linear polymers of (PO3)-, are prepared by heating a material consisting essentially of mono-ammonium dihydrogen orthophosphate at 300-450 DEG C., preferably at 350-400 DEG C., cooling, and treating the product with a solution of a quaternary ammonium salt, the pH being maintained at 5-10, preferably between 7 and 8. The ammonium dihydrogen phosphate may contain an appreciable quantity of impurity. Preferably, the heating stage is effected so as to remove effluent gases, and the pH of the final stage is adjusted by means of aqueous sodium hydroxide. The heating time is preferably at least 1/2 hour. The preferred quaternary ammonium salts are the bromides, the cations mentioned being cetyl trimethyl ammonium, didecyl dimethyl ammonium, lauryl benzyl dimethyl ammonium, and cetyl pyridinium. Specification 789,448 is referred to.ALSO:Mono - ammonium dihydrogen orthophosphate, which is preferably substantially pure but may contain an appreciable proportion of impurity, is heated at 300-450 DEG C., preferably at 350-400 DEG C. to form an ammonium polyphosphate, containing a substantially linear polymer of (PO3). In an Example (2), illustrating the use of an impure starting material, rock phosphate, ammonium sulphate and sulphuric acid are heated, in the stoichiometric proportions so as to produce NH4H2PO4 for 1 hour at 300 DEG C. and for 1 hour at 400 DEG C. Specification 789,448 is referred to.

Manufacturing process of diammonium phosphate

Manufacture of monoammonium phosphate

Manufacture of crystalline ammonium phosphates

CONTINUOUS PROCEDURE FOR PURIFYING A CRUDE PHOSPHORIC ACID DIGESTION

Stabilization of polyphosphate fertilizer solutions

A minor excess of fluoride over that required to react with all the aluminum and magnesium in ammonium and potassium polyphosphate liquid fertilizer solutions will prevent the precipitation of these elements. Effectively, this addition of excess fluoride shifts the solution composition from a region where the water-insoluble precipitate MgAl(NH4)5(P2O7)2F2.6H2O (I), is stable to a region where the water-soluble form, dimorph II, is stable; thus the metallic cations are sequestered.

Purification of crude phosphoric acid

A kind of preparation method of ammonium polyphosphate macromolecule catalysis material

本发明提供了一种聚磷酸铵用高分子催化材料的制备方法，制备步骤包括：按重量份，100份硼特效配位吸附树脂，0.01‑0.1份6‑三氟甲氧基吲哚‑2,3‑二酮，1‑5份硼酸，1‑5份2‑丙烯酰胺基‑2‑甲基丙磺酸在20‑50℃混合1‑5h，得到聚磷酸铵用高分子催化材料。

Production of ammonium phosphate

A kind of preparation method of fire retardant papers

本发明涉及一种阻燃纸的制备方法，属于纸质阻燃材料技术领域。本发明通过溶胶凝胶方法在聚磷酸铵表面用甲基三乙氧基硅烷改性制得微胶囊包覆的聚磷酸铵，提高了聚磷酸铵的耐水性和热稳定性，提高了阻燃纸在高温区的热稳定性和成炭量，有效减少燃烧过程中的热释放，并且明显提高阻燃纸的阻燃性能；本发明利用硅藻土的多孔性和高吸附性等特点与改性聚磷酸铵、五氧化二锑和氢氧化铝原位聚合，制备具有良好吸收烟雾的复合阻燃剂，以硅藻土为载体，利用其多孔性和高吸附性，在其孔隙内和表面原位聚合，制备一种具有高效阻燃效果的复合阻燃剂，复合阻燃剂的加入使纸页达到良好的阻燃效果，并降低对纸张物理性能的影响，提高其质量和适用范围。

Refining method of ammonium phosphate and refined ammonium phosphate thereof

The present invention relates to a purification method of ammonium phosphate and purified ammonium phosphate produced therefrom, and more particularly to a method for producing ammonium phosphate of high purity through a simple process of dissolution, filtration and drying. The present invention can provide a method for purifying ammonium phosphate which produces ammonium phosphate of high purity through a simple process of dissolution, filtration and drying. In addition, the present invention can provide purified ammonium phosphate which can be used as a coating material for an active material of a secondary battery because the particle size is small and the content of impurities is low.

Process for the production of sodium ammonium hydrogen phosphate and ammonium chloride from wet process phosphoric acid

Improvements in the manufacture of ammonium phosphates

A kind of method and device preparing water-soluble poly ammonium phosphate by phosphoric acid by wet process

本发明公开了一种由湿法磷酸制备水溶性聚磷酸铵的方法及装置。以湿法磷酸和气氨为原料，首先在釜式反应器中进行部分氨化，然后在石墨管式反应器中进行聚合，聚合料浆在陈化蒸发罐中进一步陈化得到熔融态的水溶性聚磷酸铵，熔融料浆进入喷粉塔干燥得到粉末状水溶性聚磷酸铵。该方法工艺简单，反应器内壁不易堵塞。

Multi-stage process of producing di-ammonium phosphate

Method of carrying out chemical reactions and product thereof

Process for ammoniating acid phosphates

PROCESS FOR THE CONTINUOUS PREPARATION OF A MOLTEN MASS OF CONDENSED AMMONIUM PHOSPHATES AND DEVICE FOR CARRYING OUT SAID METHOD

Preparation method for type II polyphosphoric acid ammonium

Ammonium polyphosphate continuous producing apparatus

本发明公开一种聚磷酸铵连续生产设备，尤其是一种用于无机化学工业中磷酸盐生产技术领域的聚磷酸铵连续生产设备。本发明提供一种反应时间短，产量得到有效扩大，运行成本低，维护方便，可以实现聚磷酸铵固体产品连续化生产的聚磷酸铵连续生产设备，包括制浆反应罐、泵、管式反应器、气液分离器和聚合反应器，所述制浆反应罐的出口与泵的进口相连，所述泵的出口与管式反应器的进口相连，所述管式反应器的出口与气液分离器的进口相连，气液分离器的出口与聚合反应器的进口相连。采用本申请的聚磷酸铵连续生产设备，各个工艺环节紧密相连，没有间断，且反应时间短，产量得到有效扩大，运行成本低，维护方便，实现了聚磷酸铵固体产品连续化生产。

Production of NPK or NP material containing polyphosphates.

Det er angitt en fremgangsmåte for nitrofosfatprosessen for å produsere NPK- eller NP-materiale med polyfosfater ved å redusere trykket i fordampningstrinnet og/eller øke temperaturen i fordampningstrinnet og/eller kontrollere temperaturen i krystallisasjonstrinnet, hvori et materiale ble produsert som inneholder en blanding av MAP, DAP, DCP og valgfritt apatitt og en kontrollert mengde av kondenserte fosfater (polyfosfater), og der N/P- og Ca/P-forholdene av NPK-materialet er N/P > 0,95 og 1,0 > Ca/P > 0,2 og produkter derav.

Installation for producing ammonium polyphosphate

Plant produces water-insoluble linear ammonium polyphosphate from ammonium ortho-phosphate and phosphorus pentoxide in the presence of gaseous ammonia. The plant consists of a reactor contg. rotary mixing and comminution tooling and having a feed pipe for the solid starting materials, an ammonia inlet pipe, a gas outlet pipe and a reaction product discharge line. The novelty is that the discharge line is connected to a mixer unit and includes a delivery device controlled by the current consumption of the drive motor of the reactor.

PROCEDURE FOR THE PRODUCTION OF AMMONIUM POLYPHOSPHATES

PROCESS FOR PREPARING A ALMOST INSOLUBLE AMMONIUM POLYPHOSPHATE IN WATER.

Patent FR2006107A1

Ammonium phosphate fertilizer process

Production of ammonium polyphosphates

Process for obtaining solid diammonium phosphate and solid mixtures containing it, from solutions of phosphoric acid

PROCEDURE FOR THE PREPARATION OF SODIUM AND AMMONIUM ACID PHOSPHATE AND AMMONIUM CHLORIDE FROM PHOSPHORIC ACID TO WET PROCESS

Process for the preparation of solid ammonium polyphosphate of crystal form II

Production of phosphate and ammonium chloride

Production of ammonium hexametaphosphate by cation exchange resin

PROCESS FOR THE PRODUCTION OF AMMONIUM POLYPHOSPHATE AND RELATED EQUIPMENT

Wet process phosphoric acid purifcn - by two-stage solvent extraction

Wet process H3PO4 is purified by (a) treating it with a solvent for H3PO4, to produce an organic soln. of pure H3PO4, and a residual product contg. impure H3PO4, (b) treating the residual product with a solvent for H3PO4, in the presence of HNO3 to give a mixed organic soln. contng. pure H3PO4 and HNO3, and (c) treating the mixed soln. with NH3 to give NH4NO3 and pure NH4H2PO4, the latter being able to be crystallized from the soln. The extraction yield is >97% and formation of pptes. is prevented; phosphoric acid (or alkali phosphate) and NH4H2PO4 are obtd. in a very pure state. The pure NH4H2PO4 may be used in the prodn of detergents or animal feedstuffs. The soln. from (c) may also be used in the prodn of binary N-P fertilizers, which are completely water-soluble.

A kind of preparation method of ammonium polyphosphate

本发明公开了一种聚磷酸铵的制备方法，包括下述步骤：将磷酸氢二铵和五氧化二磷按1.5‑2:1‑1.2的摩尔比加入配有混合器、搅拌器、热电器及研磨器的反应器中混合均匀、研磨至80‑100目，升温至260‑320℃，通入氨气，且保持0.3‑0.5MPa的氨压，反应1.5‑2.5小时，即可制成平均聚合度在80‑120的白色粉状物，冷却后过筛得到链长为≥50的长链聚磷酸铵，收率≥98%；本发明的优点是采用五氧化二磷作为缩合剂合成长链聚磷酸铵，工艺路线短、操作简便、无大量废气排出、产品质量好，并且采用单一反应器，通过调节反应器的温度、压力、反应时间即可得到不同平均聚合度的产品，可以适应不同客户的需求。

Process for the production of ammonium phosphates from mono- or dicalcium phosphate

Production of ammonium polyphosphates from melamine phosphates

Ammonium polyphosphates are prepared by a process which comprises heating melamine orthophosphate prepared from impure wet-process phosphoric acid in a stream of gaseous ammonia at a temperature between 150° C and 210° C to produce a mixture of melamine and relatively pure short-chain ammonium polyphosphates. The solid product is extracted with water to remove the ammonium polyphosphates and free the insoluble, crystalline melamine for recycle. Thus, the only starting materials consumed in the process are phosphoric acid and ammonia.

Method of producing diammonium phosphate

Diammonium phosphate is made by absorbing ammonia in a boiling p solution of phosphoric acid or monoammonium phosphate, the escaping ammoniacal steam being supplied to a solution containing phosphoric acid. Ammonia may be supplied to a saturator containing a boiling concentrated monoammonium phosphate solution, and the escaping ammoniacal steam supplied to a dilute phosphoric acid solution produced for example by leaching phosphate rock with sulphuric acid or with another mineral acid and alkali sulphate. The phosphoric acid is preferably preheated to boiling and is in such quantity that the monoammonium phosphate produced corresponds in amount to that used in the first saturator. The escaping steam may be used to preheat the phosphoric acid. In order to produce sufficient of the mono-salt in the second saturator, excess of ammonia may be supplied to the first saturator. Crystals of diammonium phosphate are separated directly or after cooling in a centrifuge, the mother liquor being returned together with the next charge of monosalt from the second saturater, which is first freed from the precipitated impurities of iron, aluminium, calcium, &c., and concentrated. Alternatively, phosphoric acid obtained as above and concentrated is neutralized directly in a series of absorption vessels, to the last of which ammonia is supplied until diammonium phosphate is formed. Crystals are separated, the vessel then being recharged with phosphoric acid and made the first of the series, the mother liquor being introduced into the last vessel of the series.

Method of and apparatus for continuously preparing melt of condensed ammonium phosphates

Process for the preparation of crystalline precipitates by reaction of solutions

Means for controlling snails comprising ammonium polyphosphate (APP), process for their preparation and use thereof.

Det omtales et organisk partikulært middel og en fremgangsmåte for å kunne fremstille middelet, samt multiple anvendelser av middelet fremstilt ved samme fremgangsmåte til jordforbedring og bekjempelse av Iberia snegle. An organic particulate agent and method for preparing the agent are disclosed, as well as multiple uses of the agent prepared by the same method for soil improvement and control of Iberia snails.

Method for preparing diammonium phosphate, starting from phosphoric acid produced by the wet process

Method for producing strong base phosphates

Process for the separation of mixtures of phosphoric and nitric acid

An aqueous mixture of H 3 PO 4 and HNO 3 , obtained e.g. by treatment of phosphate ore with HNO 3 followed by separation of the Ca salt, is extracted with an alcohol containing 4-8 carbon atoms, the water concentration of the alcoholic extract is adjusted if necessary to 8À5-12% by wt., and ammonia is then added to the extract to precipitate ammonium phosphate. NH 4 H 2 P0 4 , (NH 4 ) 2 HP0 4 , or a mixture, is obtained if NH 3 is added until the pH is 3À0-5À5, 7À5-8À5, or 5À5-7À5 resp. The alcohol may be 2-ethyl 1-butyl alcohol, isobutanol, isoamyl alcohol, or C5 oxo synthesis alcohols (n-amyl, active amyl and isoamyl alcohols). 3 phases are obtained: a ppt. of ammonium phosphate, an aqueous solution containing a little NH phosphate and part of the NH 4 NO 3 , and an alcoholic solution containing the remaining NH 4 NO 3 . In Fig. 1 and Ex.1, mother liquor 1 from the attack of phosphate ore with HNO 3 is cooled to 10 C. to crystallize out Ca(NO 3 ) 2 .4H 2 O and extracted in countercurrent at 2 with alcohol 3. The extract is purified at 5 and part is further extracted with water at 8, aqueous solution 11 being fed back to 5. Alcohol 10, free of H 3 P0 4 is recycled to 2. Remaining extract 12 is treated with NH 3 gas in tank 13. Solid ammonium phosphate 17 is filtered off and the alcoholic phase is washed with water in 19. Alcohol 20 is recycled to 2 and aqueous solutions 21 and 22 are combined and evaporated. In Fig. 2 (not shown) and Ex. 2, the mother liquor is cooled further to - 100 C. to remove more Ca(N0 3 ) 2 and the whole of alcoholic extract 6 is treated with NH 3 . In Fig. 3 (not shown) and Ex. 3, alcoholic extract 4 is passed directly for NH 3 treatment.

Advanced preparation of phosphate compounds

Liquid cleaning compositions

Process for the preparation of liquid nitrogenous and phosphate fertilizers, and products obtained

Improvement in the Manufacture of Acid Ammonium-phosphate.

8037. Wollenweber, W. May 31. Ammonium phosphate, NH4H2PO4, is obtained by introducing gaseous ammonia or gases containing ammonia, such as Mond gas, cokefurnace gas, or synthetic ammonia, into phosphoric acid of 30‹ BÚ, the acid being heated to 80-90‹ C. at the beginning of the process, and the temperature being kept at 110‹ C. by cooling if necessary. The ammonia is introduced until the density reaches 37-38‹ BÚ., the end of the reaction being indicated by a slight alkaline reaction.

Process for preparation of ammonium polyphosphate

A process is described for the production of ammonium polyphosphate employing a novel reactor configuration and reaction technique to convert wet-process phosphoric acid having a low polyphosphate content and anhydrous ammonia into an ammonium polyphosphate product having a high proportion of the total P 2 O 5 in the polyphosphate form while minimizing operational problems such as scale build up on the reactor walls and subsequent conversion of the polyphosphate formed to orthophosphate. In this novel reaction system, the heat of the exothermic ammoniation reaction is utilized to separately preheat all of the phosphoric acid reactant and a portion of the reactant ammonia through the use of a staged reaction zone including a first reaction stage comprising a jacketed free floating reaction tube having an inlet end which terminates inside the jacket and a second reaction stage comprising a vertically oriented reaction chamber equipped with an internal heat exchange coil and a sparger for injection of ammonia. The ammoniation reaction is carried out in this reaction system by injecting a portion of the reactant ammonia which has been preheated in the heat exchange coil of the second reaction stage into the first reaction stage via an injection tube which extends through the jacket into the inlet end of the reaction tube, said injection tube being sized to leave an annular space for fluid communication between the reactor tube and the jacket, and passing all of the phosphoric acid required for the final nitrogen to phosphate ratio into the jacket of the first reaction stage at a point remote from the inlet end of the reaction tube such that it is preheated by contact with a substantial portion of the external surface of the reaction tube and passes in preheated form into the reaction tube via the annular space between the ammonia injection tube and the reaction tube. In this reactor system, the remaining ammonia required for the final nitrogen to phosphate ratio is ...

Patent JPS524280B1

Ammonium phosphate preparation

Preparation method of high-linearity crystal II type ammonium polyphosphate

本发明提供一种高线性度结晶II型聚磷酸铵的制备方法，主反应步骤包括将摩尔比范围为1:0.88～0.98的五氧化二磷和磷酸氢二铵搅拌均匀，加热通氨，加热温度为180℃～220℃，五氧化二磷和磷酸氢二铵熔融后反应15分钟～60分钟。调节步骤包括加入预热到100℃～200℃的聚磷酸，加入时间为10分钟～30分钟，加完后在250℃～300℃下继续反应2h～4h，调节步骤保持通氨。冷却步骤包括停止加热，减小通氨量，冷却0.5小时～1小时，得到高线性度结晶II型聚磷酸铵。采用本发明提供的高线性度结晶II型聚磷酸铵的制备方法制得的聚磷酸铵线性度高。

Solid ammonium polyphosphate compositions and method for the manufacture thereof

ABSTRACT OF THE DISCLOSURE The present invention relates to solid instant soluble ammonium polyphosphate compositions and to a method for manufacturing thereof. The new composition comprises diammonium pyrophosphate in the orthorombic form and monoammonium orthophosphate as main components being characterized by a particular powder X'ray pattern. The process involves the reaction between phosphoric acid and gaseous ammonia, obtaining a melt and solidifying the molten mass by a vigorous agitation. The ammonium polyphosphate is very useful as fertilizer in view of its high nutrient content and can be mixed and granulated with other known fertilizers. It possess excellent physical properties being non-hygroscopic even at relative high humidity.

Process for synthesizing ammonium polyphosphate by liquid phase method

本发明公开了一种在液相体系下制备低聚磷酸铵的合成新工艺。将一定量的多元醇加入反应釜中，采用油浴加热预热至一定温度，再将磷酸一铵与尿素按比例投料，搅拌加热，得到澄清液体。澄清液体经过冷却结晶，烘干，得到均匀粉末状聚磷酸铵。该工艺与现有工艺相比反应时间短，产物纯度高，设备投资少，不需要破碎，具有工业化价值。

Method for producing strong base phosphates

Manufacturing process of diammonium phosphate

Patent FR2182834B1

Process for manufacturing crystal form II solid ammonium polyphosphate.

Long chain ammonium polyphosphate (crystal form II) is obtained by a reaction at temperatures between 180<o>C and 200<o>C using as raw materials phosphorous pentoxide (P2O5), diammonium orthophosphate ((NH4)2HPO4) and ammonium sulphate ((NH4)2SO4) in an atmosphere of ammonia gas. The manufacturing process here described allows to obtain a product which, after being cooled and milled, presents the following characteristics : a) a water solubility at 25<o>C lower than 0.4 gr. per 100 ml. suspension b) a viscosity of 10% by weight aqueous suspension lower than 40 cp. at 25<o>C. c) a viscosity of 30% by weight linear polyesther lower than 35,000 cp. at 25<o>C. The product obtained by the present manufacturing process notably improves the characteristics of other commercial products and it is considered to be satisfactory for its application in intumescent paints and flame retarded plastics.

Process and apparatus for the preparation of crystalline precipitates by reaction of solutions

Preparation of purified or condensed phosphoric acid

THE PREPARATION OF PURIFIED OR CONDENSED PHOSPHORIC ACID A B S T R A C T Wet process phosphoric acid is heated, preferably in carbon apparatus and by passing alternating current through the acid to concentrations above 76% P2O5 and preferably temperatures above 500°C to remove sulphate and fluoride and convert organic and basic impurities into a filterable precipitate: the acid is separated from the precipitate to provide a high purity cry-stallisable product.

Improvements in the manufacture of diammonium phosphate

INCLUDES SOLUBLE AMMONIUM POLYPHOSPHATE COMPOSITION AND METHOD FOR PREPARING THEREOF.

Phosphoric acid concentration process

Prepn. of clear green ammonium poly:phosphate fertiliser solns. - by partial oxidn. of carbon-contg. impurities in the phosphoric acid starting material so the final soln. is easier to filter

Prepn. of ammonium polyphosphate (I) comprises leading an ammonia stream (II) into a tube reactor followed by a stream (III) of phosphoric acid contg. carbon-contg. material and with a P2O5 content of 54-72 wt.% so that (II) and (III) are contacted at 232-343 degrees C for a sufficient time for molten droplets of ammonium polyphosphate to form. Either simultaneously with the entry of the phosphoric acid into the reactor, or up to 15 mins. before this, a nitrate oxidising agent is added in an amt. of 5-95 wt.% of the stoichiometric amt. needed for complete reaction with the C-contg. material present in the acid. Process yields clear, green, ammonium polyphosphate fertiliser solns. The carbon-contg. impurities in the phosphoric have been partially oxidised so that the solns. are easier to filter and the impurities can be sepd. from the clear green solns. Process is simpler and cheaper than previous methods for the removal of the finely divided C-contg. impurities from fertiliser solns. derived from wet-process phosphoric acid.