Abstract:
The invention discloses a method for producing acetaldehyde and/or acetic acid, according to which method a gaseous flow, containing molecular oxygen, ethanol and at least one impurity selected from sulphur compounds, is brought into contact at a high temperature with a sulphur-resistant oxidation catalyst. The ethanol is preferably obtained from a biomass. Said sulphur-resistant oxidation catalyst comprises, for example, vanadium oxide and at least one oxide of zirconium, titanium and aluminium. In one embodiment, the gaseous flow is converted, on the sulphur-resistant oxidation catalyst, into a first oxidation mixture, acetaldehyde being the predominant oxidation product, and said first oxidation mixture is converted, on another oxidation catalyst, into a second oxidation mixture, acetic acid being the predominant oxidation product. Said other oxidation catalyst comprises, for example, a multi-metal oxide containing at least molybdenum and vanadium.
Abstract:
The present invention relates to a continuous method for producing an alkylene oxide through direct oxidation of an alkene with oxygen by reacting a mixture comprising an alkene and oxygen on a catalyst containing silver for a run time Δt(i), wherein during oxidation the catalyst is also brought into contact at least once with another mixture containing ethanol for a run time Δt(ii), wherein run time Δt(i) > Δt(ii).
Abstract:
The present invention relates to a process for preparing nitriles, imines and/or enamines by converting a primary and/or secondary amine in the presence of oxygen and of an oxidation catalyst, which comprises converting an amine to the gas phase and passing it over an oxidation catalyst in an oxygenous gas stream. The invention further relates to a process for preparing amino nitriles and to the hydrolysis thereof to amino amides.
Abstract:
Method for production of ethylene oxide in a microchannel reactor, wherein an ethylene-containing material stream and an oxygen- or oxygen-source-containing material stream are fed to the microchannel reactor and the reaction to give ethylene oxide takes place in the catalyst-containing microchannel reactor. Alkyl halides are continuously fed to the microchannel reactor at a concentration of 0.3 to 50 ppm by volume with respect to the total volume stream of all material streams fed to the reactor.