PHOTOCHLORINATION OF PHTHALIC ANHYDRIDE - Occidental Chemical Corporation

Title:

PHOTOCHLORINATION OF PHTHALIC ANHYDRIDE

Document Type and Number:

Japanese Patent JP3252920

Kind Code:

B2

Abstract:

PURPOSE: To obtain 4-chlorophthalic acid anhydride with high yield by irradiating phthalic acid anhydride and chlorine with light.
CONSTITUTION: Chlorine and phthalic acid anhydride in a vapor phase are sent to a reaction chamber and irradiated with light (preferably UV rays) to obtain chlorinated phthalic acid anhydride having at least 5:1 ratio of (4 chlorophthalic acid anhydride):(3-chlorophthalic acid anhydride). The reaction is preferably carried out at 275 to 325°C and the ratio of (chlorine):(phthalic acid anhydride) is preferably 1:1 to 2:1.

More Like This:

JP5572556	A manufacturing method of trimellitic anhydride アリール ester
WO/1989/001935	PROCESS FOR THE PREPARATION OF OXY-DIPHTHALIC ANHYDRIDES
WO/2015/162227	CATALYST ARRANGEMENT WITH OPTIMIZED VOID FRACTION FOR THE PRODUCTION OF PHTHALIC ACID ANHYDRIDE

Inventors:

Carl W. Separ
John Earl Molinaro

Application Number:

JP9971292A

Publication Date:

February 04, 2002

Filing Date:

April 20, 1992

Export Citation:

Click for automatic bibliography generation Help

Assignee:

Occidental Chemical Corporation

International Classes:

C07D307/89; C07B39/00; C07C51/567; (IPC1-7): C07D307/89; C07B39/00

Domestic Patent References:

JP5088074A
JP63130559A

Other References:

Ｊ．Ｏｒｇ．Ｃｈｅｍ．，４８（１５），ｐ．２４６５−２４６８（１９８３）

Attorney, Agent or Firm:

Minoru Nakamura (6 outside)

Previous Patent: MAGNETIC RECORDING MEDIUM FOR SLAVE

Next Patent: METHOD OF COUNTING CELL BODIES OF MICROORGANISM