Back to results
US 11,827,585 B2Granted
Method for producing acrylonitrile
AssigneeAsahi Kasei Kabushiki Kaisha
InventorsKazunari Morii, Akiyoshi Fukuzawa
Life of this patent
Estimating the term…
Abstract
A method for producing acrylonitrile, having: a catalyst treatment step of preparing a composite metal oxide catalyst including molybdenum, bismuth, and iron and including 50 ppm or more of carbon; and a vapor-phase catalytic oxidation step of subjecting propylene to ammoxidation reaction using the composite metal oxide catalyst to produce acrylonitrile.
Claims7
A method for producing acrylonitrile, comprising:
- a catalyst treatment step of preparing a composite metal oxide catalyst comprising molybdenum, bismuth, and iron and comprising 50 ppm or more of carbon;
- and
- a vapor-phase catalytic oxidation step of subjecting propylene to ammoxidation reaction using the composite metal oxide catalyst to produce the acrylonitrile,
- wherein the catalyst treatment step has:
- a pre-step of treating a composite metal oxide comprising molybdenum, bismuth, and iron under a reducing gas and oxygen atmosphere for 50 hours or longer;
- and
- a post-step of circulating the composite metal oxide in a hopper with nitrogen or air.
4 more elements
Dependencies are inferred from the claim text.