Abstract:
Disclosed is a method for producing at least one partial propylene oxidation and/or ammoxidation product, according to which the propylene is produced from raw propane by means of dehydration and is subjected to a heterogeneously catalyzed partial gas phase oxidation and/or partial gas phase ammoxidation in the presence of unreacted propane as a component of a gas mixture 2 containing
Abstract:
A process for the long-term operation of a continuously operated heterogeneous catalyzed partial dehydrogenation of a hydrocarbon to be dehydrogenated, in which a stream of reaction gas mixture containing the hydrocarbon to be dehydrogenated in a molar starting amount HC is passed through a total catalyst bed containing the total amount M of dehydrogenation catalyst and deactivation of the total catalyst bed is counteracted by, as the period of operation increases, the conversion contribution of the first third in the flow direction of the total amount M of dehydrogenation catalyst decreasing, the conversion contribution of the last third in the flow direction of the total amount M of dehydrogenation catalyst increasing and the conversion contribution of the second third in the flow direction of the total amount M of dehydrogenation catalyst going through a maximum.
Abstract:
The invention relates to a method for producing acrolein and/or acrylic acid from propane and/or propene, comprising the following steps: (a) separating the propane and/or propene from a gas mixture containing propane or propene by means of absorption into an absorption agent, (b) separating the propane and/or propene from the absorption agent thereby obtaining a gas B, and (c) using the gas B obtained in step (b) to convert propane and/or propene into acrolein and/or acrylic acid by means of oxidation. No heterogeneously catalysed dehydrogenation of propane is carried out between steps (b) and (c) without a supply of oxygen.
Abstract:
Disclosed is a method for the heterogeneously catalyzed partial direct oxidation of propane and/or isobutane. According to said method, target product is separated from the product gas mixture obtained in the reaction stage in a reprocessing stage, the remaining product gas mixture is divided into two partial quantities having the same composition, one partial quantity is redirected into the reaction stage while the other partial quantity is discharged, and both the reaction stage and the reprocessing stage are operated at an increased pressure.
Abstract:
The invention relates to a method for the production of at least one partial oxidation and/or ammoxidation product of a hydrocarbon, wherein at least one saturated hydrocarbon (K) that is heterogeneously catalyzed is partially dehydrogenated and the resulting product gas mixture (A) containing the partially dehydrogenated hydrocarbon is used as such or in modified form for the heterogeneously catalyzed, partial oxidation and/or ammoxidation of the partially dehydrogenated hydrocarbon contained in the product gas mixture (A), wherein at least one mechanical separation operation is conducted between the product gas mixture (A) and the heterogeneously catalyzed, partial oxidation and/or ammoxidation.
Abstract:
Production of chlorine by catalytic gas-phase oxidation of hydrogen chloride (HCl), in which an HCl-containing gas and an oxygen-containing gas are fed into a reaction zone containing a fixed bed of catalyst to give a product gas comprising chlorine, oxygen, HCl and water vapor, comprises removing a recycle stream from the product gas and recycling it to the reaction zone.
Abstract:
La invencion se relaciona a un metodo para producir formiatos del acido que consisten de suministrar una corriente (I) fluida que contiene acido formico y una corriente (II) fluida que contiene formiato metalico y en la mezcla de la corriente (I) fluida y la corriente (II) fluida para obtener formiato de acido formico correspondiente. Tal invencion se caracteriza en que una corriente (III) fluida de la corriente que contiene componentes de formiato metalico, metanolato metalico, metanol y metilester del acido formico (MeFo) en una relacion >0.1% en masa se inserta dentro la corriente (I) fluida o el precursor del mismo, dentro de la corriente (II) fluida o los precursores del mismo o dentro de una mezcla que se forma por las corrientes (I) y (II) fluidas. La corriente (III) fluida se obtiene por un metodo para producir MeFo carbonilando .metanol en un reactor a una presion de hasta 50 MPa absolutos en la presencia de metanolato metalico que se utiliza como un catalizador homogeneo.
Abstract:
Un proceso para la preparación de formiatos ácidos mediante la provisión de una corriente líquida (I) que contiene ácido fórmico y una corriente líquida (II) que contiene un formiato de metal y la mezcla de la corriente líquida (I) con al corriente líquida (II), para obtener el correspondiente formiato ácido, que comprende la alimentación a la corriente líquida (I) o uno de sus precursores, a la corriente líquida (II) o uno de sus precursores, o a la mezcla de las corrientes líquidas(I) y (II), de una corriente líquida (III) que contiene los siguientes componentes en contenidos de, en cada caso, > 0,1 % en peso: formiato de metal, metóxido de metal, metanol y MeFo (MeFo), que se produce en un proceso para la preparación de MeFo por carbonilación de metanol en un reactor a una presión absoluta de hasta 50 MPa en presencia de un metóxido de metal como catalizador homogéneo. Uso de formiatos ácidos preparados en el proceso descripto para conservar y/o acidificar material vegetal y/o material animal, para el tratamiento de desechos biológicos, o como aditivo para la nutrición animal y/o como promotor del crecimiento de animales.
Abstract:
Formic acid-formates are produced by (a) partial hydrolysis of methyl formate (MF) with water, (b) distillation to give (S1) formic acid and water, (c) conversion of the other product from (b) (mainly MF) into a stream (S2) containing formate and water by reaction with aqueous strong base and distillation of methanol, and (d) combination of (S1) with (S2). A method for the production of formic acid-formates (I) involves: (a) partial hydrolysis of methyl formate (MF) with water; (b) distillation to give a stream (S1) containing formic acid and water; (c) conversion of the MF- and possibly methanol-containing stream from (b) into a formate- and water-containing stream (S2) by (i) reaction with a basic compound of an acid with a pKa value of at least 3 in presence of water followed by (ii) removal of methanol by distillation; and (d) combination of streams (S1) and (S2). An Independent claim is also included for apparatus for the production of (I), comprising: (A) a reactor for the hydrolysis of MF; (B) a distillation column for separating a stream containing MF, formic acid, methanol and water; (C) a column for the hydrolysis of MF with a basic compound with removal of methanol by distillation (with an inlet for the base above the inlet for the product from (B)); and (D) a column connected to the bottom of (B) for removing water from the stream containing formic acid and water.
Abstract:
Formic acid-formates are produced by (a) partial hydrolysis of methyl formate (MF) with water, (b) distillation to give (S1) formic acid and water, (c) conversion of the other product from (b) (mainly MF) into a stream (S2) containing formate and water by reaction with aqueous strong base and distillation of methanol, and (d) combination of (S1) with (S2). A method for the production of formic acid-formates (I) involves: (a) partial hydrolysis of methyl formate (MF) with water; (b) distillation to give a stream (S1) containing formic acid and water; (c) conversion of the MF- and possibly methanol-containing stream from (b) into a formate- and water-containing stream (S2) by (i) reaction with a basic compound of an acid with a pKa value of at least 3 in presence of water followed by (ii) removal of methanol by distillation; and (d) combination of streams (S1) and (S2). An Independent claim is also included for apparatus for the production of (I), comprising: (A) a reactor for the hydrolysis of MF; (B) a distillation column for separating a stream containing MF, formic acid, methanol and water; (C) a column for the hydrolysis of MF with a basic compound with removal of methanol by distillation (with an inlet for the base above the inlet for the product from (B)); and (D) a column connected to the bottom of (B) for removing water from the stream containing formic acid and water.