Process for continuously preparing methyl mercaptan from carbon compounds, sulfur and hydrogen

The invention relates to a process for continuously preparing methyl mercaptan by reacting a mixture comprising carbon compounds with sulfur and hydrogen, wherein the carbon disulfide and hydrogen sulfide compounds which form are subsequently converted to methyl mercaptan.

Improved catalyst based on zeolite for producing olefins and for oligomerizing olefins

The invention relates to a novel catalyst based on zeolite, and the use of said catalyst in a method for producing lower olefins from oxygenates and in a method for oligomerizing olefins. The novel catalyst has a SiO2/Al2O3 weight ratio of 2 to 9, a BET surface of 250 to 500 m2/g, and an Na content under 200 ppm, said catalyst comprising a crystalline alumosilicate zeolite and a binder. The catalyst is characterized in that the ratio of the peak heights of the IR absorption bands v=3610 cm-1 +-20 cm-1/ v=3680 cm-1 +-20 cm-1 is greater than 1.8.

Method for the continuous production of methyl mercaptan from carbon-containing compounds, sulfur, and hydrogen

The invention relates to a method for the continuous production of methyl mercaptan by converting a mixture, which contains carbon-containing compounds, with sulfur and hydrogen, wherein the resulting compounds of carbon disulfide and hydrogen sulfide are subsequently converted to methyl mercaptan.

CATALYST BASED ON ZEOLITE FOR PRODUCING OLEFINS AND FOR OLIGOMERIZING OLEFINS

The invention relates to a novel catalyst based on zeolite, the production of that catalyst, and the use of the catalyst in a method for producing lower olefins from oxygenates and for oligomerizing olefins. The novel catalyst has a SiO/AlOweight ratio of 2 to 9, a BET surface of 250 to 500 m/g, and an Na content under 200 ppm. The catalyst includes a crystalline alumosilicate zeolite and a binder. The catalyst is characterized in that the ratio of the peak heights of its IR absorption bands v=3610 cm±20 cm/v=3680 cm±20 cmis greater than 1.8. 1. Catalyst with a SiO/AlOweight ratio from 2 to 9 , a BET surface area from 250 to 500 m/g and a Na content of less than 200 ppm , wherein the catalyst comprises a crystalline aluminosilicate zeolite and a binder , characterized in that the ratio of the peak heights of the IR absorption bands v=3610 cm±20 cm/v=3680 cm±20 cmof the catalyst is greater than 1.8.2. Catalyst according to claim 1 , characterized in that the aluminosilicate zeolite has an MFI structure and the binder comprises aluminium oxide.3. Catalyst according to claim 1 , characterized in that the ratio of the peak heights of the IR absorption bands v=3610 cm±20 cm/v=3680 cm±20 cmof the catalyst is 2.0 or greater.4. Catalyst according to claim 1 , characterized in that the aluminosilicate zeolite is present in an H form.5. Process for producing the catalyst according to claim 1 , comprising the following steps:(a) crystallizing an aluminosilicate from an aqueous synthesis suspension, comprising a silicon source, an aluminium source, an alkali source and a template,(b) separating the aluminosilicate out of the synthesis suspension, followed by a drying step and a calcining step to remove the template from the aluminosilicate;(c) ion exchanging alkali ions contained in the aluminosilicate in an aqueous medium with a proton-containing substance or a substance that yields protons when heated, wherein the molar ratio of the protons of the proton-containing or proton- ...

HIGH-PRESSURE, HIGH-TEMPERATURE MAGIC ANGLE SPINNING NUCLEAR MAGNETIC RESONANCE DEVICES AND PROCESSES FOR MAKING AND USING SAME

Re-usable ceramic magic angle spinning (MAS) NMR rotors constructed of high-mechanic strength ceramics are detailed that include a sample compartment that maintains high pressures up to at least about 200 atmospheres (atm) and high temperatures up to about least about 300° C. during operation. The rotor designs minimize pressure losses stemming from penetration over an extended period of time. The present invention makes possible a variety of in-situ high pressure, high temperature MAS NMR experiments not previously achieved in the prior art. 1. A magic angle sample spinning (MAS) nuclear magnetic resonance (NMR) rotor for high pressure and high temperature operation , comprising:a rotor cylinder composed of a high mechanical strength ceramic;a ceramic insert configured to insert along the length of inner wall of the rotor cylinder with an opening at one end thereof and an inner bore that extends to a selected depth therein that defines a sample compartment when the ceramic insert is inserted into the rotor cylinder;a threaded sealing cap configured to thread into matching threads disposed along the length of the inner wall of the ceramic insert above the sample compartment, the sealing cap when threaded into the ceramic insert compresses a high temperature O-ring that seals the sample compartment that maintains a combined high pressure and high temperature therein during operation.2. The rotor of claim 1 , wherein the ceramic insert defines a sample compartment within the rotor cylinder that maintains a combined temperature of at least up to about 250° C. and a pressure at least up to about 10 atm during operation.3. The rotor of claim 1 , wherein the sample compartment includes a volume defined by the depth of the inner bore within the ceramic insert with an inner diameter that spans the diameter of the ceramic insert less the wall thickness of the ceramic insert surrounding the sample compartment.4. The rotor of claim 1 , wherein the sealing cap includes an ...

PROCESS FOR PREPARING A CATALYST, CATALYST AND PROCESS FOR THE OXIDATIVE DEHYDROGENATION OF HYDROCARBONS

A process for preparing a catalyst provided in the form of a metal oxide catalyst having at least one element selected from Mo, Te, Nb, V, Cr, Dy, Ga, Sb, Ni, Co, Pt and Ce. The catalyst is subjected to an aftertreatment to increase the proportion of the M1 phase, by contacting the catalyst with steam at a pressure below 100 bar or by contacting the catalyst with oxygen to obtain an aftertreated catalyst. The aftertreated catalyst may be used for oxidative dehydrogenation processes. 1. A process for preparing a catalyst , wherein a catalyst is provided in the form of a metal oxide catalyst which comprises at least one element of the group Mo , Te , Nb , V , Cr , Dy , Ga , Sb , Ni , Co , Pt and Ce ,characterized in that is contacted with steam at a pressure below 100 bar, preferably below 80 bar, preferably below 50 bar, and/or', 'is contacted with oxygen., 'the catalyst is subjected to an aftertreatment to increase the fraction of the M1 phase of the catalyst, wherein the catalyst, with generation of an aftertreated catalyst,'}2. The process as claimed in claim 1 , characterized in that the catalyst claim 1 , during the aftertreatment claim 1 , is contacted with the steam and/or the oxygen at a temperature of at least 200° C. claim 1 , preferably at a temperature of at least 350° C. claim 1 , preferably at a temperature of at least 400° C. claim 1 , preferably at a temperature in the range from 200° C. to 650′ claim 1 , preferably at a temperature in the range from 300° C. to 650° C. claim 1 , preferably at a temperature in the range from 350° C. to 600° C. claim 1 , preferably at a temperature in the range from 350° C. to 550° C. claim 1 , preferably at a temperature in the range from 350° C. to 400° C. claim 1 , preferably at a temperature in the range from 400° C. to 500° C.3. The process as claimed in claim 1 , characterized in that the catalyst is a metal oxide catalyst comprising the elements Mo claim 1 , V claim 1 , Te claim 1 , Nb.4. The process as claimed ...

SELECTIVE OLIGOMERIZATION OF OLEFINS

The invention relates to a catalyst system for oligomerizing olefins over a catalyst comprising nickel, to the use of this catalyst and to a method for dimerizing olefins. 1. Catalyst system comprising a Ni ion-exchanged zeolite of Linde Type A having a Ni content of 1 to 10 wt % (based on the total mass of the catalyst) , characterized in that in addition the cations of potassium , sodium or calcium incorporated in the zeolite are at least partially exchanged with other alkali metal or alkaline earth metal ions , wherein the proportion of alkali metal and/or alkaline earth metal ions introduced is between 0.02 and 8.8 wt %.2. Catalyst system according to claim 1 , characterized in that the Ni ion exchange is effected by liquid ion exchange.3. Catalyst system according to claim 1 , characterized in that the alkali metal or alkaline earth metal ions are selected from lithium and/or magnesium.4. Catalyst system according to claim 1 , characterized in that the exchange with alkali metal and/or alkaline earth metal ions is effected by liquid ion exchange.5. Method for oligomerizing olefins claim 1 , wherein the olefins are present in gaseous or supercritical form claim 1 , wherein a Ni ion-exchanged zeolite of Linde Type A having a Ni content of 1 to 10 wt % (based on the total mass of the catalyst) is used as catalyst and wherein an ISO index of less than 0.8 is achieved at a conversion per pass of >10%.6. Method according to claim 5 , characterized in that the olefins used are C2- to C6-olefins or mixtures thereof.7. Method according to claim 5 , characterized in that the olefin is n-butene.8. Method for oligomerizing n-butene claim 5 , comprising the following steps:{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'A) providing a catalyst system according to ,'}B) oligomerizing n-butene by contacting the catalyst system with an n-butene-containing mixture.9. Method according to claim 8 , characterized in that the oligomerization is conducted at a temperature in the ...

Improved zeolite-based catalyst for the production of olefins and oligomerization of olefins

Die vorliegende Erfindung betrifft einen neuen Katalysator auf Zeolithbasis, sowie dessen Verwendung in einem Verfahren zur Herstellung von niederen Olefinen aus Oxygenaten und in einem Verfahren zur Oligomerisierung von Olefinen. Der neue Katalysator weist ein SiO2/Al2O3-Gewichtsverhältnis von 2 bis 9, eine BET-Oberfläche von 250 bis 500 m2/g und einen Na-Gehalt unter 200 ppm auf, wobei der Katalysator einen kristallinen Alumosilicat-Zeolithen und ein Bindemittel umfasst und dadurch gekennzeichnet ist, dass das Verhältnis der Peakhöhen der IR-Absorptionsbanden ν = 3610 cm–1 ± 20 cm–1/ν = 3680 cm–1 ± 20 cm–1 größer als 1,8 ist. The present invention relates to a novel zeolite-based catalyst and its use in a process for the preparation of lower olefins from oxygenates and in a process for the oligomerization of olefins. The new catalyst has a SiO 2 / Al 2 O 3 weight ratio of 2 to 9, a BET surface area of 250 to 500 m 2 / g and a Na content of less than 200 ppm, the catalyst comprising a crystalline aluminosilicate zeolite and a binder and thereby characterized in that the ratio of the peak heights of the IR absorption bands ν = 3610 cm-1 ± 20 cm-1 / ν = 3680 cm-1 ± 20 cm-1 is greater than 1.8.

Catalyst based on zeolite for producing olefins and for oligomerizing olefins

The invention relates to a novel catalyst based on zeolite, the production of that catalyst, and the use of the catalyst in a method for producing lower olefins from oxygenates and for oligomerizing olefins. The novel catalyst has a SiO 2 /Al 2 O 3 weight ratio of 2 to 9, a BET surface of 250 to 500 m 2 /g, and an Na content under 200 ppm. The catalyst includes a crystalline alumosilicate zeolite and a binder. The catalyst is characterized in that the ratio of the peak heights of its IR absorption bands v=3610 cm −1 ±20 cm −1 /v=3680 cm −1 ±20 cm −1 is greater than 1.8.

Improved catalyst based on zeolite for producing olefins and for oligomerizing olefins

The invention relates to a novel catalyst based on zeolite, and the use of said catalyst in a method for producing lower olefins from oxygenates and in a method for oligomerizing olefins. The novel catalyst has a SiO 2 /Al 2 O 3 weight ratio of 2 to 9, a BET surface of 250 to 500 m 2 /g, and an Na content under 200 ppm, said catalyst comprising a crystalline alumosilicate zeolite and a binder. The catalyst is characterized in that the ratio of the peak heights of the IR absorption bands v=3610 cm -1 ±20 cm -1 / v=3680 cm -1 ±20 cm -1 is greater than 1.8.

Method for the continuous production of methyl mercaptan from carbon-containing compounds, sulfur and hydrogen

THE INVENTION RELATES TO A METHOD FOR THE CONTINOUS PRODUCTION OF METHYL MERCAPTAN BY CONVERTING A MIXTURE, WHICH CONTAINS CARBON-CONTAINING COMPOUNDS, WITH SULFUR AND HYDROGEN, WHEREIN THE RESULTING COMPOUNDS OF CARBON DISULFIDE AND HYDROGEN SULFIDE ARE SUBSEQUENTLY CONVERTED TO METHYL MERCAPTAN. (NO SUITABLE

Process for preparing a catalyst, catalyst and process for the oxidative dehydrogenation of hydrocarbons

The invention relates to a process for preparing a catalyst, a catalyst being provided in the form of a metal oxide catalyst comprising at least one element selected from the group consisting of Mo, Te, Nb, V, Cr, Dy, Ga, Sb, Ni, Co, Pt and Ce. According to the invention, it is provided that the catalyst K is subjected to an aftertreatment to increase the proportion of the M1 phase, the catalyst K being contacted with steam at a pressure below 100 bar and/or being contacted with oxygen to obtain an aftertreated catalyst K'. The invention further relates to a catalyst K' prepared by the process and to a process for oxidative dehydrogenation with a catalyst K' according to the invention.

Procedure for the continuous preparation of methylmercaptane from compounds containing carbon, sulfur and hydrogen

Un procedimiento para la preparación de metilmercaptano, que contiene las etapas de a) hidrogenar sulfuro de carbono en presencia de un catalizador constituido sobre la base de molibdatos de metales alcalinos o wolframatos de metales alcalinos, que están aplicados sobre un soporte, y b) convertir químicamente la mezcla de reacción que contiene sulfuro de hidrógeno, formada en esta reacción, con por lo menos uno de los compuestos, seleccionados entre el conjunto que se compone de alcoholes, éteres, aldehídos, COS, CO, CO2, CO+CO2, en presencia de un catalizador de óxidos metálicos constituidos sobre la base de molibdatos de metales alcalinos o wolframatos de metales alcalinos, que están aplicados sobre un soporte, añadiéndose hidrógeno solamente cuando se necesite. A process for the preparation of methyl mercaptan, which contains the steps of a) hydrogenating carbon sulfide in the presence of a catalyst constituted on the basis of alkali metal molybdates or alkali metal wolframates, which are applied on a support, and b) chemically converting the reaction mixture containing hydrogen sulfide, formed in this reaction, with at least one of the compounds, selected from the set consisting of alcohols, ethers, aldehydes, COS, CO, CO2, CO + CO2, in the presence of a catalyst of metal oxides constituted on the basis of alkali metal molybdates or alkali metal wolframates, which are applied on a support, adding hydrogen only when needed.

Production of a high temperature resistant catalyst used e.g. in vehicles comprises preparing a coating material in the form of a gel using a catalytically active substance

Production of a high temperature resistant catalyst comprises preparing a coating material in the form of a gel using a catalytically active substance or a substance which can be converted into a catalytically active substance in a stoichiometric amount; applying the gel on a support; drying the gel; and calcining. An Independent claim is also included for the catalyst produced. Preferred Features: The catalyst matrix contains a metal or a metal compound. The coating material is produced by reacting solutions of a metal A and a metal B so that the metals precipitate as hydroxides, which are then removed from the remaining solution. The metal A is nickel and the metal B is aluminum, chromium or iron. The coating material is calcined at 600-1200, preferably 800-1100, especially 950-1000 deg C forming a substance having the formula: ((AO)x + Ab2O4). An alkaline precipitating agent, preferably NH4OH or (NH4)2CO3, is used to precipitate the hydroxides.

selective oligomerization of olefins

a invenção se refere a um sistema de catalisador para oligomerizar olefinas em um catalisador que compreende níquel, o uso deste catalisador e um método para dimerizar olefinas. The invention relates to a catalyst system for oligomerizing olefins in a catalyst comprising nickel, the use of this catalyst and a method for dimerizing olefins.

Selective oligomerization of olefins

Process for preparing a catalyst, catalyst and process for the oxidative dehydrogenation of hydrocarbons

The invention relates to a process for preparing a catalyst, a catalyst being provided in the form of a metal oxide catalyst comprising at least one element selected from the group consisting of Mo, Te, Nb, V, Cr, Dy, Ga, Sb, Ni, Co, Pt and Ce. According to the invention, it is provided that the catalyst K is subjected to an aftertreatment to increase the proportion of the M1 phase, the catalyst K being contacted with steam at a pressure below 100 bar and/or being contacted with oxygen to obtain an aftertreated catalyst K'. The invention further relates to a catalyst K' prepared by the process and to a process for oxidative dehydrogenation with a catalyst K' according to the invention.

Process for preparing a catalyst, catalyst and process for the oxidative dehydrogenation of hydrocarbons

The invention relates to a process for preparing a catalyst, a catalyst being provided in the form of a metal oxide catalyst comprising at least one element selected from the group consisting of Mo, Te, Nb, V, Cr, Dy, Ga, Sb, Ni, Co, Pt and Ce. According to the invention, it is provided that the catalyst K is subjected to an aftertreatment to increase the proportion of the M1 phase, the catalyst K being contacted with steam at a pressure below 100 bar and/or being contacted with oxygen to obtain an aftertreated catalyst K'. The invention further relates to a catalyst K' prepared by the process and to a process for oxidative dehydrogenation with a catalyst K' according to the invention.

Catalyst for the synthesis of alkyl mercaptan and process for its preparation

Process for the preparation of alkyl mercaptan

Catalyst for the synthesis of alkyl mercaptan and process for its preparation

A catalyst may include a support and from 5 to 20 wt.-% of a promoter, based on the total weight of the catalyst, wherein the support may include titanium dioxide, zirconium dioxide, and/or a mixture thereof, and the promoter may be an alkali metal oxide. Processes for preparing such catalysts may include impregnating a support of titanium dioxide and/or zirconium dioxide with an aqueous solution including a preferably soluble alkali compound and calcining. Alkyl mercaptans may be prepared in the presence of such catalysts or catalysts obtained by such processes.

Process for producing a catalyst comprising an alkali metal and a transition metal in oxidised form

The present invention relates to a process for producing a catalyst which comprises at least one alkali metal and at least one transition metal in oxidised form, comprising the steps of a) providing a solution comprising at least one compound comprising an alkali metal and at least one compound comprising a transition metal in oxidised form, wherein the alkali metal and the transition metal may be constituents of the same compound, b) applying the solution from step a) onto a pulverulent support material having a particle diameter of less than 1000 µm, and c) shaping the laden support material obtained from step b), to a catalyst obtained or obtainable by the process according to the invention and to the use of a catalyst according to the invention and/or a catalystobtained or obtainable by the process according to the invention in the production of an alkyl mercaptan.

Katalysator für säurekatalysierte kohlenwasserstoff-umwandlungen

Katalysator für säurekatalysierte kohlenwasserstoff-umwandlungen

Beschrieben wird ein Katalysator für säurekatalysierte Kohlenwasserstoff-Umwandlungen, insbesondere für die Alkylierung von Olefinen mit Isoparaffinen, enthaltend eine kristallinen Zeolith mit einem SiO2/Al2O3-MOlverhältnis von < 10, dessen Alkali-Kationen mindestens teilweise durch H<+>-Ionen und/oder drei- oder mehrwertie Kationen ausgetauscht sind, wobei die Restkonzentration an Alkali-Kationen weniger als etwa 0,2 Gew.-% beträgt, wobei die Konzentration der Brönsted-Säurezentren, bestimmt als Funktion des an der Oberfläche chemisorbierten Pyridins, etwa 0,1 bis 4 mmol/g Katalysator beträgt und das Verhältnis zwischen der KOnzentration der Säurezentren vom Brönsted-Typ (B) und vom Lewis-Typ (L), ausgedrückt als Flächenverhältnis der Absorptionsbanden bei 1540 ∓ 5 cm<-1> (B) und 1450 ∓ 5 cm<-1> (L) nach dem Erhitzen auf eine Temperatur von 450 DEG C, etwa 1,4 oder höher beträgt.

Catalisador para conversoes de hidrocarbonetos catalisadas por acido

Catalizador para transformaciones de hidrocarburos catalizadas por acidos.

Catalizador para transformaciones de hidrocarburos, catalizadas por ácidos, en especial para la alquilación de olefinas con isoparafinas, que contiene una faujasita cristalina del tipo X, Y o LSX, con una relación molar SiO2/Al2O3 de < 10, cuyos cationes alcalinos están intercambiados, al menos parcialmente, por cationes tri- o polivalentes, ascendiendo la concentración residual en cationes alcalinos a menos del 0, 2% en peso, ascendiendo la concentración de los centros ácidos de Brönsted, determinada como función de la piridina quimioadsorbida en la superficie, a una cantidad comprendida entre 0, 1 y 4 mmol/g de catalizador, y la relación entre la concentración de los centros ácidos del tipo Brönsted (B) y del tipo Lewis (L), expresada como relación superficial de las bandas de adsorción a 1540 5 cm-1 (B) y 1450 5 cm- 1 (L), después de calentar hasta una temperatura de 450ºC, asciende a 1, 4 o más, ascendiendo la proporción de piridina unida a los centros ácidos de Brönsted, todavía no desorbida de la superficie del catalizador a una temperatura de 450ºC, a un valor comprendido entre el 30 y el 60% de la piridina quimioadsorbida a los centros ácidos de Brönsted a 100ºC.