METHOD FOR PRODUCING TRANS-1,4-CYCLOHEXANE DICARBOXYLIC ACID

Title:

METHOD FOR PRODUCING TRANS-1,4-CYCLOHEXANE DICARBOXYLIC ACID

Document Type and Number:

Japanese Patent JP2010163439

Kind Code:

A

Abstract:

To provide a method for producing trans-1,4-cyclohexane dicarboxylic acid (t-CHDA) having high concentration by efficiently isomerizing cis-1,4-cyclohexane dicarboxylic acid (c-CHDA) by a simple method.

In the method for producing t-CHDA, the t-CHDA is produced by a step of: heating a mixture of c-CHDA and t-CHDA (crude CHDA) more than the melting point of c-CHDA; isomerizing the c-CHDA by keeping the mixture below the melting point of the t-CHDA; precipitating the t-CHDA formed by isomerization in the molten c-CHDA; and separating and recovering the t-CHDA precipitated in the molten c-CHDA.

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Inventors:

ENDO HIROYOSHI
NAKAMURA HIROFUMI
TANAKA SHINICHI

Application Number:

JP2010039112A

Publication Date:

July 29, 2010

Filing Date:

February 24, 2010

Export Citation:

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Assignee:

MITSUBISHI CHEM CORP

International Classes:

C07C51/353; B01J23/44; C07C51/36; C07C61/09; C07B61/00

Attorney, Agent or Firm:

Shunichi Yoshimura

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