PRODUCTION OF METHACRYLIC ACID - NIPPON CATALYTIC CHEM IND

Title:

PRODUCTION OF METHACRYLIC ACID

Document Type and Number:

Japanese Patent JP2509049

Kind Code:

B2

Abstract:

PURPOSE: To produce high-quality methacrylic acid having an extremely low content of diketones by suppressing formation of diketones as by-products by a remarkably simple and low-cost method.
CONSTITUTION: In a method for producing methacrylic acid by introducing methacrolein and/or isobutylaldehyde and molecular oxygen to a heat exchange type multi-tubular reactor packed with an oxide catalyst containing molybdenum and phosphorus and carrying out contact vapor-phase oxidation reaction and/or contact vapor-phase oxidation reaction through dehydrogenation, space of the gas outlet of the reactor is packed with a solid filler.

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Inventors:

TAZAKI HIROYUKI
KURIMOTO IKUO
UHARA HIROYUKI
AOKI YUKIO

Application Number:

JP17721692A

Publication Date:

June 19, 1996

Filing Date:

July 03, 1992

Export Citation:

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Assignee:

NIPPON CATALYTIC CHEM IND

International Classes:

B01J23/88; B01J27/188; C07B61/00; C07C51/235; C07C51/25; C07C57/05; C07C57/055; (IPC1-7): C07C57/055

Domestic Patent References:

JP222242A
JP1165543A

Attorney, Agent or Firm:

Takehiko Matsumoto

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