Title:
METHOD FOR PREPARING CATALYST FOR PRODUCING α,β-UNSATURATED CARBOXYLIC ACID, AND METHOD FOR PRODUCING α,β-UNSATURATED CARBOXYLIC ACID AND α,β-UNSATURATED CARBOXYLIC ACID ESTER
Document Type and Number:
WIPO Patent Application WO/2019/163984
Kind Code:
A1
Abstract:
Provided is a catalyst for producing an α,β-unsaturated carboxylic acid at a high yield. The present invention also provides a method for preparing a catalyst for producing an α,β-unsaturated carboxylic acid, the catalyst being used when producing an α,β-unsaturated carboxylic acid by gas-phase catalytic oxidation of an α,β-unsaturated aldehyde with molecular oxygen. The method is characterized by comprising (i) a step for obtaining an aqueous slurry comprising a heteropolyacid salt containing at least molybdenum and phosphorous, (ii) a step for continuously stirring the aqueous slurry at a temperature below 50°C for 2.5-24.5 hours, and (iii) a step for spray-drying the aqueous slurry obtained after the continuous stirring of step (ii).
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Inventors:
KURIHARA YU (JP)
KATO YUKI (JP)
WATANABE TAKURO (JP)
KATO YUKI (JP)
WATANABE TAKURO (JP)
Application Number:
PCT/JP2019/007015
Publication Date:
August 29, 2019
Filing Date:
February 25, 2019
Export Citation:
Assignee:
MITSUBISHI CHEM CORP (JP)
International Classes:
B01J37/08; B01J27/199; C07C51/235; C07C57/055; C07C67/03; C07C69/653; C07B61/00
Foreign References:
| JP2014226614A | 2014-12-08 | |||
| US20140141964A1 | 2014-05-22 | |||
| JP2009511256A | 2009-03-19 | |||
| JP2010520040A | 2010-06-10 | |||
| JP2009226270A | 2009-10-08 | |||
| JP2010516441A | 2010-05-20 | |||
| JPS5644046A | 1981-04-23 | |||
| JPH11226410A | 1999-08-24 |
Attorney, Agent or Firm:
MIYAZAKI Teruo et al. (JP)
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