Catalyst for production of methacrylic acid and method for produ

Details Catalyst for production of methacrylic acid and method for produ Catalyst for production of methacrylic acid and method for produ

1995-05-31

1997-04-08

Glass, Margaret W.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acids and salts thereof

562531, 562535, 502211, 502212, 502209, 502220, B01J 2716

Patent

active

056189745

ABSTRACT:
A catalyst for the production of methacrylic acid by the vapor-phase catalyst oxidation and/or oxidative dehydrogenation of at least one compound selected rom the group consisting of methacrolein, isobutyl aldehyde, and isobutyric acid and a method for the production of methacrylic acid by the use of this catalyst are provided. The catalyst of this invention comprises (A) a composite oxide having Mo and P as essential components and used for the production of methacrylic acid by vapor-phase catalytic oxidation and/or oxidative dehydrogenation of methacrolein, isobutyl aldehyde, and/or isobutyric acid and (B) a solid acid having acid strength (Ho) of not more than -11.93. Since this catalyst excels in catalytic activity and service life, it allows methacrylic acid to be produced stably at a high yield for a long time.

REFERENCES:
patent: 5153162 (1992-10-01), Kurimoto et al.
patent: 5330954 (1994-07-01), Cadot et al.
"Solid Suferacid in This Decade," Kazushi Araki, 1989.
European Search Report, EP 95 10 8271, Nov. 3, 1995.
Recent Progress in Solid Superacid, Applied Catalysis, 61 (1990) 1-25.
Yamaguchi, "Recent Progress in Solid Superacid", pp. 1-25.

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