Method for producing acrolein
AssigneeEvonik Degussa GmbH
InventorsMartin STEFFAN, Helmut MUELLER, Philipp ROTH, Christoph WECKBECKER, Harald JAKOB
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Abstract
The present invention relates to a process for preparing acrolein from propylene by catalytic gas phase oxidation with molecular oxygen (for example air). The invention further relates to the use of particular propylene-containing starting materials, for example refinery grade propylene, for preparation of acrolein.
Claims13
Process for preparing acrolein by catalytic gas phase oxidation, said process comprising the following steps:
- a) providing a reaction gas comprising propylene and molecular oxygen, and
- b) contacting the reaction gas with an oxidation catalyst to form a gas mixture comprising acrolein, the oxidation catalyst being a mixed oxide catalyst comprising or consisting of one or more base components selected from molybdenum, vanadium and tungsten,
- characterized in that more than 10 ppm by weight of sulphur in the form of any sulphur components is present in the reaction gas provided, but not more than 5000 ppm by weight of sulphur in the form of any sulphur components and not more than 5000 ppm by weight of unsaturated hydrocarbons selected from the group consisting of C2H4, C3H4, C4H8, C4H6, C5H10, C5H8 and mixtures thereof is present in each case in the reaction gas provided.
Use of a reaction gas for preparation of acrolein, characterized in that the reaction gas contains more than 10 ppm by weight of sulphur in the form of any sulphur components, the reaction gas in each case containing not more than 5000 ppm by weight of sulphur in the form of any sulphur components and not more than 5000 ppm by weight of unsaturated hydrocarbons, selected from the group consisting of C2H4, C3H4, C4H8, C4H6, C5H10, C5H8 and mixtures thereof.
Dependencies are inferred from the claim text.