Abstract:
PROBLEM TO BE SOLVED: To provide a method for producing phthalic anhydride, capable of simultaneously completing a short running-up time, a high yield, formation of small amounts of by-products, further better product characteristics, and all preferable parameters such as a low phthalide content. SOLUTION: In the method for producing phthalic anhydride, the catalytic vapor phase oxidation of xylene and/or naphthalene is performed by using a gas including molecular oxygen at an uplifted temperature in a fixed bed and by using a specific shell catalyst which is formed by applying a layer comprising a catalytic active metal oxide onto a catalyst core comprising a carrier material and which is arranged by stacking three layers. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
The invention relates to a method for producing aromatic amines by the catalytic hydrogenation of the corresponding aromatic nitro compound, characterized by using a copper-containing catalyst with a SiO2-containing carrier, the SiO2 being produced by wet grinding and subsequent spray drying.
Abstract:
Disclosed is a method for the direct amination of hydrocarbons into amino hydrocarbons by reacting a feedstock stream E containing at least one hydrocarbon and at least one amination reagent so as to obtain a reaction mixture R containing amino hydrocarbon and hydrogen in a reaction zone RZ, and electrochemically separating at least some of the hydrogen produced during the reaction from the reaction mixture R by means of a gas-tight membrane-electrode assembly comprising at least one membrane selectively conducting protons and at least one electrode catalyst on each side of the membrane, wherein at least some of the hydrogen is oxidized to protons on the anode catalyst on the retentate side of the membrane, and after penetrating the membrane, some of the protons on the permeate side are b1) reduced to hydrogen on the cathode catalyst by applying a voltage, and some of the protons b2) are reacted with oxygen on the cathode catalyst to obtain water, thereby generating electricity, the oxygen being fed from an oxygen-containing stream O that is brought in contact with the permeate side of the membrane.
Abstract:
The invention relates to a method for the direct amination of hydrocarbons to form amino hydrocarbons, comprising the following steps: conversion of an educt flow E containing at least one hydrocarbon and at least one amination reagent into a reaction mixture R containing amino hydrocarbons and hydrogen, and b) electrochemical separation of at least part of the hydrogen created during the conversion, from the reaction mixture R, by means of a gas-tight membrane electrode assembly comprising at least one selectively proton-conducting membrane and at least one electrode catalyst on each side of the membrane. On the retenate side of the membrane, at least part of the hydrogen is oxidised on the anode catalyst to form protons and, after passing through the membrane, on the permeate side, on the cathode catalyst, the protons are b1) reduced to hydrogen and/or b2) converted to water with oxygen, the oxygen originating from a flow O containing oxygen, brought into contact with the permeate side of the membrane.
Abstract:
The present invention relates to a shell catalyst, comprising an active metal selected from the group of ruthenium, rhodium, palladium, platinum, and mixtures thereof, applied to a carrier material comprising silicon dioxide, wherein the pore volume of the carrier material is 0.6 to 1.0 ml/g, determined by Hg porosimetry, the BET surface area is 280 to 500 m2/g, and at least 90% of the pores present comprise a diameter from 6 to 12 nm, to a method for producing said shell catalyst, to a method for hydrogenating an organic compound comprising at least one hydrogenatable group using the shell catalyst, and to the use of the shell catalyst for hydrogenating an organic compound.
Abstract:
Disclosed is a method for the direct amination of hydrocarbons into amino hydrocarbons by reacting a feedstock stream E containing at least one hydrocarbon and at least one amination reagent so as to obtain a reaction mixture R containing amino hydrocarbons and hydrogen in a reaction zone RZ, and electrochemically separating at least some of the hydrogen produced during the reaction from the reaction mixture R by means of a gas-tight membrane-electrode assembly comprising at least one membrane selectively conducting protons and at least one electrode catalyst on each side of the membrane, wherein at least some of the hydrogen is oxidized to protons on the anode catalyst on the retentate side of the membrane, and the protons are reduced to hydrogen on the cathode catalyst on the permeate side after penetrating the membrane.
Abstract:
Disclosed is a method for the direct amination of hydrocarbons into amino hydrocarbons by reacting a feedstock stream E containing at least one hydrocarbon and at least one amination reagent so as to obtain a reaction mixture R containing amino hydrocarbon and hydrogen in a reaction zone RZ, and electrochemically separating at least some of the hydrogen produced during the reaction from the reaction mixture R by means of a gas-tight membrane-electrode assembly comprising at least one membrane selectively conducting protons and at least one electrode catalyst on each side of the membrane, wherein at least some of the hydrogen is oxidized to protons on the anode catalyst on the retentate side of the membrane, and the protons are reacted with oxygen on the cathode catalyst on the permeate side after penetrating the membrane so as to obtain water, the oxygen being fed from an oxygen-containing stream O that is brought in contact with the permeate side of the membrane.
Abstract:
The invention relates to a hydroamination catalyst containing boron-beta zeolites, characterised in that said catalyst is doped with lithium, and to a method for producing said catalyst. The invention also relates to a method for producing amines by reacting ammonium or primary or secondary amines with olefins at high temperatures and pressures in the presence of the claimed hydroamination catalyst.