METHOD FOR PRODUCING ACROLEIN

摘要

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.

主权项

1. 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.