PROCESS FOR THE ELECTROOXIDATION OF METHANOL TO FORMALDEHYDE AND METHYLAL

Title:

PROCESS FOR THE ELECTROOXIDATION OF METHANOL TO FORMALDEHYDE AND METHYLAL

Document Type and Number:

WIPO Patent Application WO1993018209

Kind Code:

A3

Abstract:

Formaldehyde and/or methylal are made by the electrooxidation of methanol in an apparatus which is divided into the anode compartment and the cathode compartment by a cationic membrane made of a fluoropolymer and having pendant fluorosulfonyl or sulfonic acid groups, which is coated on one side with platinum applied by the impregnation-reduction method, said coating serving as the anode. The cathode may be a metal layer on the opposite side of the membrane or a separate metal cathode. When the separate metal cathode is employed, the cathode compartment contains a liquid electrolyte, which is a concentrated inorganic acid, preferably phosphoric acid. Within specifically identified temperature ranges, the yield of formaldehyde and of methylal can be optimized by controlling the mole fraction or partial pressure of methanol feed.

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Inventors:

FEDKIW PETER STANLEY JR (US)
LIU RAYMOND (US)
TRAINHAM JAMES ARTHUR III (US)

Application Number:

PCT/US1993/001531

Publication Date:

December 09, 1993

Filing Date:

February 26, 1993

Export Citation:

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Assignee:

DU PONT (US)
UNIV NORTH CAROLINA STATE (US)

International Classes:

B01J19/24; C25B3/23; (IPC1-7): C25B3/02; C25B11/20

Foreign References:

US4959132A	1990-09-25
US4732655A	1988-03-22

Other References:

PATENT ABSTRACTS OF JAPAN vol. 12, no. 11 (C - 468)<2858> 13 January 1988 (1988-01-13)
PATENT ABSTRACTS OF JAPAN
PATENT ABSTRACTS OF JAPAN

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