Process for producing methyl methacrylate

Details Process for producing methyl methacrylate Process for producing methyl methacrylate

1995-12-20

1998-04-14

Killos, Paul J.

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

Organic compounds

Carboxylic acid esters

C07C 6730

Patent

active

057393796

ABSTRACT:
A process for producing methyl methacrylate through gas-phase catalytic reaction of methyl .alpha.-hydroxyisobutyrate as the starting raw material which process comprises feeding methanol in an amount by weight of 0.1 to 3.0 times the amount of the methyl .alpha.-hydroxyisobutyrate in a reaction system and proceeding with the gas-phase catalytic reaction in the presence of a catalyst comprising a synthetic faujasite zeolite having a free alkali content of at most 0.1 milliequivalent/g or a catalyst comprising a molded product which is formed by molding a synthetic faujasite zeolite and a clay in an aqueous solution or suspension having a pH of less than 9. According to the above process, it is possible to produce methyl methacrylate in high yield over a long period of time by the use of methyl .alpha.-hydroxyisobutyrate as the starting raw material.

REFERENCES:
patent: 5068399 (1991-11-01), Naito et al.
patent: 5250729 (1993-10-01), Abe et al.
patent: 5371273 (1994-12-01), Shima et al.

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