METHOD FOR VAPOR PHASE CATALYTIC OXIDATION

Title:

METHOD FOR VAPOR PHASE CATALYTIC OXIDATION

Document Type and Number:

WIPO Patent Application WO/2003/057653

Kind Code:

A1

Abstract:

A method for vapor phase catalytic oxidation involving using a fixed bed multi-tube heat-exchanger type reactor having a plurality of reaction tubes, feeding a raw material gas for reaction to the inside of the reaction tube packed with a catalyst to produce a reaction product gas, characterized in that the pressure loss of each reaction tube having a catalyst packed therein is adjusted in a manner wherein a reaction tube showing a pressure loss less than an average pressure loss for the total reaction tubes is additionally packed with an inert material in its portion near the entrance of a raw material gas, or is removed of the catalyst and re-packed with the catalyst, and a reaction tube showing a pressure loss greater than the above average value is removed of the catalyst and then re-packed with the catalyst, so as for the each reaction tube to show a pressure loss within the range of ± 20 % of the average value. The method can provide a vapor phase catalytic oxidation method which is almost free of variations in the reaction states in respective reaction tubes.

Inventors:

YADA SHUHEI (JP)
GORIKI MASAYASU (JP)
HOSAKA HIROCHIKA (JP)
JINNO KIMIKATSU (JP)
SAITO TERUO (JP)
SUZUKI YOSHIRO (JP)

Application Number:

PCT/JP2002/013372

Publication Date:

July 17, 2003

Filing Date:

December 20, 2002

Export Citation:

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Assignee:

MITSUBISHI CHEM CORP (JP)
YADA SHUHEI (JP)
GORIKI MASAYASU (JP)
HOSAKA HIROCHIKA (JP)
JINNO KIMIKATSU (JP)
SAITO TERUO (JP)
SUZUKI YOSHIRO (JP)

International Classes:

B01J8/00; B01J8/06; B01J23/28; B01J23/31; B01J23/887; B01J35/02; C07C45/33; C07C45/35; C07C27/14; C07C51/25; (IPC1-7): C07C27/14; C07C45/33; C07C45/35; C07C47/22; C07C51/25; C07C57/05; C07B33/00; B01J8/02

Foreign References:

JPS60136344U	1985-09-10
JPH067669A	1994-01-18
JPH0597730A	1993-04-20
US4461327A	1984-07-24
EP1156027A1	2001-11-21
JPH05261272A	1993-10-12
JP2002306953A	2002-10-22
JP2003001094A	2003-01-07

Other References: