Process for producing methacrylic acid and methacrolein by oxida

Details Process for producing methacrylic acid and methacrolein by oxida Process for producing methacrylic acid and methacrolein by oxida

1993-11-24

1995-01-10

Prescott, Arthur C.

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

Organic compounds

Carboxylic acids and salts thereof

5625122, 562523, C07C 5125, C07C 5704

Patent

active

053809327

ABSTRACT:
The present invention relates to a process for the production of methacrylic acid and methacrolein by means of gas phase oxidation of isobutane in the gaseous phase at 250.degree. to 450.degree. C. on molybdenum heteropoly acid catalysts that are made up of CU.sub.a H.sub.b P.sub.c Mo.sub.d V.sub.e O.sub.f heteropoly acid compounds (I), where a=0.1 to 1, b=0 to 7.8, c=0.8 to 1.2, d=9 to 12, e=0.5 to 3, and f depends on the molar numbers a to e, and/or the heteropoly acid H.sub.8 PMo.sub.10 VO.sub.39 (II) or its anhydride PMo.sub.10 VO.sub.35 (III).

REFERENCES:
patent: 4606863 (1986-08-01), Nakazawa et al.
patent: 5294739 (1994-03-01), Kraushaar-Czarnetzki et al.
patent: 5300682 (1994-04-01), Blum et al.

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