Preparation of catalysts for producing methacrolein and methacry

Details Preparation of catalysts for producing methacrolein and methacry Preparation of catalysts for producing methacrolein and methacry

1990-09-18

1992-11-24

Shine, W. J.

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Boron or compound containing same

502212, 502226, 502243, 502304, 502306, 502307, 502311, B01J 2378, B01J 2382, B01J 2384, B01J 2388

Patent

active

051661195

ABSTRACT:
A method for preparing a multicomponent catalyst including molybdenum, bismuth, iron and cesium or thallium for producing methacrolein and methacrylic acid by the gas-phase catalytic oxidation of isobutylene or tert-butanol with molecular oxygen, wherein an aqueous nitric acid solution containing 0.01 to 0.36 mole of nitric acid per mole of ammonium molybdate, which is a material for the molybdenum component of the catalyst, and at least one material for the bismuth, iron, cesium and thallium components of the catalyst is added to an aqueous solution containing ammonium molybdate and materials for the remaining catalyst components, if any, to obtain a slurry which is then dried and calcined, provided that the nitric acid excludes nitric acid radicals contained in the materials containing the catalyst components. The amount of nitric acid used is controlled in a particular range, so that a highly active catalyst for gas-phase catalytic oxidation is obtained.

REFERENCES:
patent: 4035418 (1977-07-01), Okada et al.
patent: 4224193 (1980-09-01), Vanderspurt
patent: 4248803 (1981-02-01), Vanderspurt
patent: 4707460 (1987-11-01), Ishii et al.
patent: 4816603 (1989-03-01), Oh-Kita et al.

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