PROCESS FOR THE PREPARATION OF NICOTINIC ACID

The invention relates to an improved process for the preparation of nicotinic acid by the direct oxidation of .beta.-picoline in the gas phase, wherein water and .beta.-picoline are fed separately to the catalyst bed and the catalyst is based on a titanium dioxide support which has been prepared by the sulfate method and has a high specific surface area and a vanadium oxide content of from 5 to 50 %.

Arrangement to the sterile racking.

Eine Anordnung zum sterilen Produzieren und/oder Abfüllen pharmazeutischer Produkte enthält eine Einhausung (6), die mit Ausnahme eines Einlasses und eines Auslasses mit definiertem Querschnitt luftdicht geschlossen ist. Durch den Lufteinlass wird Luft über einen Filter in das Innere der Einhausung (6) gedrückt. Diese Luft gelangt durch den Luftauslass oder Kanäle aus der Einhausung (6) heraus. Die Grösse des Querschnitts des Luftauslasses und die Förderleistung der Belüftungseinrichtung (9) sind so abgestimmt, dass in dem Inneren der Einhausung (6) eine laminare, unidirektionale oder kombinierte Luftströmung und ein konstanter Überdruck gegenüber dem Druck ausserhalb der Einhausung (6) entsteht. Dieser Überdruck wird durch eine Regeleinrichtung (15) auf einem konstanten Wert gehalten. Die Anordnung ist im Hinblick auf die erzielte Sauberkeit und den Medienschutz einem Isolator vergleichbar, lässt sich aber wesentlich kostengünstiger herstellen, in Betrieb nehmen, validieren und betreiben ...

PROCEDURE FOR THE TRANSFORMATION OF POLYSULFANEN

PROCESS FOR PREPARING METHYL MERCAPTAN

The present invention relates to a process for continuously preparing methyl mercaptan from hydrogen sulphide and methanol in direct conjunction with the preparation of hydrogen sulphide.

PROCESS FOR PREPARING METHYLMERCAPTOPROPIONALDEHYDE

A process for preparing methylmercaptopropionaldehyde in a single reaction unit, is provided. According to the preferred embodiment, the process comprises, simultaneously contacting a gaseous mixture comprising acrolein with a liquid mixture comprising methylmercaptopropionaldehyde, methyl mercaptan, a catalyst and methylmercaptopropionaldehyde methyl thiohemiacetal in the reactive absorber; absorbing the acrolein from the gaseous mixture into the liquid mixture; reacting the absorbed acrolein with the methyl mercaptan or the methylmercaptopropionaldehyde methyl thiohemiacetal to obtain methylmercapto-propionaldehyde; removing gaseous impurities and by-products from the liquid mixture; and separating the obtained methylmercaptopropionaldehyde product from the reactive absorber, directing a portion of the separated product to storage or further processing and recycling the remaining portion to the reactive absorber; wherein the methyl mercaptan optionally comprises dimethyl sulfide or dimethyl ether. 1. A process for preparing methylmercaptopropionaldehyde in a single reaction unit , comprising , simultaneously:contacting a gaseous mixture comprising acrolein with a liquid mixture comprising methylmercaptopropionaldehyde, methyl mercaptan, a catalyst and methylmercaptopropionaldehyde methyl thiohemiacetal in the reaction unit;absorbing the acrolein from the gaseous mixture into the liquid mixture;reacting the absorbed acrolein with the methyl mercaptan or the methylmercaptopropionaldehyde methyl thiohemiacetal to obtain methylmercapto-propionaldehyde;removing gaseous impurities and by-products from the liquid mixture; andseparating the obtained methylmercaptopropionaldehyde product from the reaction unit, directing a portion of the separated product to storage or further processing and recycling the remaining portion to the reaction unit;wherein the methyl mercaptan is in the form of crude methyl mercaptan comprising greater than 87% by weight methyl mercaptan, 1.5 ...

KATALYSATOR FUER DIE KATALYTISCHE GASPHASENOXIDATION VON OLEFINEN ZU UNGESAETTIGTEN ALDEHYDEN

Process for the conversion of polysulfanes

Verfahren zur Abtrennung von Methylmercaptan aus Reaktionsgemischen

Die Erfindung betrifft ein Verfahren zur Abtrennung von Methylmercaptan aus Reaktionsgasgemischen, die durch katalytische Umsetzung von H¶2¶S mit Methanol erhalten werden, indem man das Methylmercaptan in Gegenwart der Nebenprodukte mit Acrolein zu MMP umsetzt und dieses abtrennt.

Process for preparing methyl mercaptan

The present invention relates to a process for continuously preparing methyl mercaptan from hydrogen sulphide and methanol in a direct connection with the preparation of hydrogen sulphide.

Verfahren zur Herstellung von Nikotinsäure

Die Erfindung betrifft ein verbessertes Verfahren zur Herstellung von Nikotinsäure durch Direktoxidation von beta-Picolin in der Gasphase, wobei Wasser und beta-Picolin getrennt voneinander zum Katalysatorbett geführt werden und der Katalysator auf einem Titandioxidträger basiert, der nach der Sulfatmethode hergestellt wurde und eine hohe spezifische Oberfläche und einen Anteil von 5-50% Vanadiumoxid besitzt.

PROCESS FOR THE PREPARATION OF MIXTURES OF CYCLIC ACROLEIN GLYCEROL ACETALS

Mixtures of cyclic acrolein glycerol acetals can be obtained in higher volume/time yields than in prior art processes and with very high selectivity from the reaction of acrolein with glycerol in the presence of a solid acid catalyst and distillative working up if the reaction is carried out in the presence of the reaction mixture consisting substantially of acrolein, glycerol, cyclic acrolein glycerol acetals and water, this reaction mixture being used as solvent, and without additional solvents. If necessary, a pH increasing agent may be added to the reaction mixture, after the latter has been freed from catalyst and before it is worked up by distillation, in an amount such that the pH of the reaction mixture in tenfold dilution with water is in the range of from 4.5 to 7. The reaction is preferably carried out at 10 to 30.degree.C, using a strongly acid organic or inorganic ion exchanger.

Process for the conversion of polysulfanes

The invention provides a process for the removal of polysulfanes from gas streams formed during H2S synthesis.

Method for coating the inner surfaces of a glass container comprises relieving the pressure of a sterile vapor in the container, adding a determined amount of silicone oil and/or a water/silicone emulsion and further processing

Method for coating the inner surfaces of a glass container comprises relieving the pressure of a sterile vapor as carrier medium in the container, adding a determined amount of silicone oil and/or a water/silicone emulsion to the vapor and precipitating the silicone oil as precipitate on the inner surfaces of the container. An independent claim is also included for a device for coating the inner surfaces of a glass container using the above coating method.

DEVICE FOR SEPARATING INTO SHAPED BODIES PLASTIC ROPES.

Pour séparer en corps moulés de taille rgéulière des cordes extrudées en matière plastique, on utilise un élément coupant, ayant la forme d'une jante à laquelle on fixe en des points diamétralement opposés une ou plurieurs sections de fil (6) au moyen d'un ressort situé à une extrémité ou aux deux extrémités.

Method for removing acrolein from the process gas of a heterogeneously catalysed oxidation of propene

The invention relates to a process for separating acrolein from the process gas of a heterogeneously catalyzed oxidation of propene by means of atmospheric oxygen, wherein high boilers (including acrylic acid) are firstly separated off from the process gas by means of quenching and technical-grade acrolein having small proportions of low boilers is then obtained by means of absorption and subsequent distillation. Small amounts of a solvent by means of which, in particular, oligomers formed are separated off and the tendency for foam to be formed in the apparatuses or columns is reduced is added in the columns and heat exchangers in the work-up process. The solvent is, according to the invention, separated off and recycled in the form of an organic phase in-situ within the existing process.

Method for the separation of methyl mercaptan from reaction gas mixtures

The invention relates to a method for the separation of methyl mercaptan from reaction gas mixtures obtained by means of the catalytic conversion of H2S with methanol, by means of converting the methyl mercaptan into MMP in the presence of the byproducts with acrolein, and separating the same.

Verfahren zur Umwandlung von Polysulfanen

Gegenstand der Erfindung ist ein Verfahren zur Umwandlung von Polysulfanen, wie sie in bei der H¶2¶S-Synthese anfallenden Gasströmen zu finden sind, in H¶2¶S und Schwefel.

Process for preparing methylmercaptopropionaldehyde

A process for preparing methylmercaptopropionaldehyde in a single reaction unit, is provided. According to the preferred embodiment, the process comprises, simultaneously contacting a gaseous mixture comprising acrolein with a liquid mixture comprising methylmercaptopropionaldehyde, methyl mercaptan, a catalyst and methylmercaptopropionaldehyde methyl thiohemiacetal in the reactive absorber; absorbing the acrolein from the gaseous mixture into the liquid mixture; reacting the absorbed acrolein with the methyl mercaptan or the methylmercaptopropionaldehyde methyl thiohemiacetal to obtain methylmercapto-propionaldehyde; removing gaseous impurities and by-products from the liquid mixture; and separating the obtained methylmercaptopropionaldehyde product from the reactive absorber, directing a portion of the separated product to storage or further processing and recycling the remaining portion to the reactive absorber; wherein the methyl mercaptan optionally comprises dimethyl sulfide or dimethyl ...

VERFAHREN ZUR UMWANDLUNG VON POLYSULFANEN

Verfahren zur Befüllung von Apparaturen mit Feststoffen

Die Erfindung betrifft ein Verfahren zur Befüllung von Apparaten der chemischen Produktion mit Feststoffen unter Einsatz einer regelbaren Dosiereinrichtung sowie eine örtlich verschiebbare Vorrichtung zur Ausführung des Verfahrens. Die Vorrichtung eignet sich insbesondere für die Befüllung von Wärmeaustauschern, Absorptionskolonnen, Destillationskolonnen oder Rohrbündelreaktoren mit Feststoffen.

Process for preparing methyl mercaptan

The present invention relates to a process for continuously preparing methyl mercaptan from hydrogen sulphide and methanol in direct conjunction with the preparation of hydrogen sulphide.

Process for preparing methylmercaptopropionaldehyde

A process for preparing methylmercaptopropionaldehyde in a single reaction unit, is provided. According to the preferred embodiment, the process comprises, simultaneously contacting a gaseous mixture comprising acrolein with a liquid mixture comprising methylmercaptopropionaldehyde, methyl mercaptan, a catalyst and methylmercaptopropionaldehyde methyl thiohemiacetal in the reactive absorber; absorbing the acrolein from the gaseous mixture into the liquid mixture; reacting the absorbed acrolein with the methyl mercaptan or the methylmercaptopropionaldehyde methyl thiohemiacetal to obtain methylmercaptopropionaldehyde; removing gaseous impurities and by-products from the liquid mixture; and separating the obtained methylmercaptopropionaldehyde product from the reactive absorber, directing a portion of the separated product to storage or further processing and recycling the remaining portion to the reactive absorber; wherein the methyl mercaptan optionally comprises dimethyl sulfide or dimethyl ...

PROCESS FOR PREPARING METHYLMERCAPTOPROPIONALDEHYDE

... 14Process For Preparing Methylmercaptopropionaldehyde Abstract 5 The present invention relates to a process for preparingmethylmercaptopropionaldehyde from gaseous acrolein and methyl mercaptan, characterized in that, in one process step, simultaneously, (a) gaseous acrolein is absorbed from a mixture at least comprising one compound from the group consisting of the hemithioacetal of methylmercaptopropionaldehyde, 10 methylmercaptopropionaldehyde and methyl mercaptan, (b) in this mixture, acrolein is reacted with methyl mercaptan and/or the hemithioacetal of methylmercaptopropionaldehyde to give methylmercaptopropionaldehyde and (c) impurities and by-products are removed from this mixture. 15 (No suitable figure) ...

Verfahren zur Herstellung von Methylmercaptan

Die vorliegende Erfindung betrifft ein Verfahren zur kontinuierlichen Herstellung von Methylmercaptan aus Schwefelwasserstoff und Methanol in direkter Verbindung mit der Herstellung von Schwefelwasserstoff.

Anordnung zum sterilen Abfüllen

Eine Anordnung zum sterilen Produzieren und/oder Abfüllen pharmazeutischer Produkte enthält eine Einhausung, die mit Ausnahme eines Einlasses und eines Auslasses mit definiertem Querschnitt luftdicht geschlossen ist. Durch den Lufteinlass wird Luft über einen Filter in das Innere der Einhausung gedrückt. Diese Luft gelangt durch den Luftauslass oder Kanäle aus der Einhausung heraus. Die Größe des Querschnitts des Luftauslasses und die Förderleistung der Belüftungseinrichtung sind so abgestimmt, dass in dem Inneren der Einhausung eine laminare, unidirektionale oder kombinierte Luftströmung und ein konstanter Überdruck gegenüber dem Druck außerhalb der Einhausung entsteht. Dieser Überdruck wird durch eine Regeleinrichtung auf einen konstanten Wert gehalten. Die Anordnung ist im Hinblick auf die erzielte Sauberkeit und den Medienschutz einem Isolator vergleichbar, lässt sich aber wesentlich kostengünstiger herstellen, in Betrieb nehmen, validieren und betreiben.

METHOD FOR THE SEPARATION OF METHYL MERCAPTAN FROM REACTION GAS MIXTURES

The invention relates to a method for the separation of methyl mercaptan from reaction gas mixtures obtained by means of the catalytic conversion of HS with methanol, by means of converting the methyl mercaptan into MMP in the presence of the byproducts with acrolein, and separating the same.2 © KIPO & WIPO 2007 ...

Process for continuous production of methyl mercaptan

PROCESS FOR PREPARING METHYLMERCAPTOPROPIONALDEHYDE

A process for preparing methylmercaptopropionaldehyde in a single reaction unit, is provided. According to the preferred embodiment, the process comprises, simultaneously contacting a gaseous mixture comprising acrolein with a liquid mixture comprising methylmercaptopropionaldehyde, methyl mercaptan, a catalyst and methylmercaptopropionaldehyde methyl thiohemiacetal in the reactive absorber; absorbing the acrolein from the gaseous mixture into the liquid mixture; reacting the absorbed acrolein with the methyl mercaptan or the methylmercaptopropionaldehyde methyl thiohemiacetal to obtain methylmercapto-propionaldehyde; removing gaseous impurities and by-products from the liquid mixture; and separating the obtained methylmercaptopropionaldehyde product from the reactive absorber, directing a portion of the separated product to storage or further processing and recycling the remaining portion to the reactive absorber; wherein the methyl mercaptan optionally comprises dimethyl sulfide or dimethyl ether.

Method of filling apparatuses with solids

Process for the preparation of nicotinic acid

A process for the preparation of nicotinic acid by the direct oxidation of beta-picoline in the gas phase, wherein water and beta-picoline are fed separately to the catalyst bed and the catalyst is based on a titanium dioxide support which has been prepared by the sulfate method and has a high specific surface area and a vanadium oxide content of from 5 to 50 %.

Process for separating product gas mixture from catalytic synthesis of methyl mercaptan

Method for preparation of propylenealdehyde by catalysis of oxide propylene in gas phase

Catalyst, its preparation and use in synthesis of methyl mercaptan

Process for the conversion of polysulfanes

The invention provides a process for the removal of polysulfanes from gas streams formed during H₂S synthesis.

Sterile filling arrangement

An arrangement for the sterile, aseptic production and/or filling of pharmaceutical products contains a housing which, with the exception of an inlet and an outlet with a clearly defined cross-section, is closed in an airtight manner. Through the air inlet air is forced via a filter into the interior of the housing. The air passes out of the housing through the air outlet or channels. The size of the cross-section of the air outlet and the performance of the ventilating device are matched in such a way that within the interior of the housing there is a laminar unidirectional or combined airflow and a constant overpressure with respect to the pressure outside the housing.

Sterile filling arrangement

An arrangement for the sterile/aseptic production and/or filling of pharmaceutical products contains a housing which, with the exception of an inlet and an outlet with a clearly defined cross-section, is closed in an airtight manner. Through the air inlet air is forced via a filter into the interior of the housing. The air passes out of the housing through the air outlet or channels. The size of the cross-section of the air outlet and the performance of the ventilating device are matched in such a way that within the interior of the housing there is a laminar unidirectional or combined airflow and a constant overpressure with respect to the pressure outside the housing. This overpressure is kept at a constant value by a regulating device. With respect to the cleanness and the protection of the product obtained, the arrangement is comparable with an isolator, but can be manufactured, installed, validated and operated much less expensively.

Catalyst for catalytic gas-phase oxidation of olefin to unsaturated aldehydes

Method for separating methyl mercaptan from reaction gas mixtures

METHOD FOR REMOVING ACROLEIN FROM THE PROCESS GAS OF A HETEROGENEOUSLY CATALYSED OXIDATION OF PROPENE

The invention relates to a process for separating acrolein from the process gas of a heterogeneously catalysed oxidation of propene by means of atmospheric oxygen, wherein high boilers (including acrylic acid) are firstly separated off from the process gas by means of quenching and technical-grade acrolein having small proportions of low boilers is then obtained by means of absorption and subsequent distillation. Small amounts of a solvent by means of which, in particular, oligomers formed are separated off and the tendency for foam to be formed in the apparatuses or columns is reduced is added in the columns and heat exchangers in the work-up process. The solvent is, according to the invention, separated off and recycled in the form of an organic phase in-situ within the existing process. 1. Continuous process for preparing acrolein , wherein the following are carried outA) gas-phase oxidation of propene by air over a heterogeneous catalyst in the presence of a diluent gas in one reaction stageB) capture of the acrolein-containing gas stream A) in a quenching stage consisting of bottom, middle and top sections for separating off by-products in the presence of water and an organic phase containing sparingly water-soluble organic solventC) capture of the acrolein-containing gas stream from the quenching stage B) in an absorption stage consisting of bottom, middle and top sections in the presence of water and an organic phase containing sparingly water-soluble organic solvent to obtain an aqueous acrolein solution which contains organic phase, and an incondensable gas streamC1) at least partial recirculation of the incondensable gas stream from C) as diluent gas to the reaction stage A)D) separation of the acrolein by distillation from the aqueous acrolein solution which contains organic phase from C) in a distillation stagewhere the remaining aqueous solution which contains organic phase and has been freed of acrolein is discharged from the distillation stage D) so ...

Processo para a preparação contínua de metilmercaptano

Patent DE3930533C1

Patent DE3930534C2

Method of filling apparatuses with solids

The invention relates to a method for filling chemical production apparatuses with solids using a controllable metering means and also a mobile device for carrying out the method. The device is suitable in particular for filling heat exchangers, absorption columns, distillation columns or tube bundle reactors with solids.

Catalyst for the catalytic gas phase oxidation of olefins to unsaturated aldehydes.

A catalyst is described for the production of unsaturated aldehydes by means of oxidation with a oxygen-containing gas where an active mass, containing at least the elements Mo, Bi, P and O, as well as Si-containing carrier material, is used in the form of a catalyst body with a certain ratio between the outer surface and the volume and with a defined extent in terms of space, porosity, density, specific surface, breaking strength, abrasion, and gas through-flow capability. Also described is a method of making the catalyst.

Process for the preparation of 2-vinyl-1,3-dioxolane

Verfahren zur umwandlung von polysulfanen

Verfahren zur herstellung von 2-vinyl-1,3- dioxolan

Verfahren zur herstellung von acrolein durch katalytische gasphasenoxidation von propen.

Verfahren zur herstellung von gemischen cyclischer acroleinglycerinacetale.

Aus mehreren Quadern bestehender Verbundkörper

Aus mehreren gelenkig miteinander verbundenen orthogonalen Prismen bestehender Koerper