METHOD FOR PRODUCING SUCCINIC ACID

Title:

METHOD FOR PRODUCING SUCCINIC ACID

Document Type and Number:

Japanese Patent JP2008043327

Kind Code:

A

Abstract:

To provide a method for efficiently obtaining a highly purified succinic acid from a succinic acid alkali metal salt by a simple separating and purifying method.

This method for producing the succinic acid comprises (1) a process of adding sulfuric acid to a liquid containing the alkali metal salt of succinic acid, (2) a process of precipitating and removing the crystal of an alkali metal sulfuric aid salt from the liquid, and (3) a process of precipitating for recovering the succinic acid crystal. The removal of the alkali metal sulfuric acid salt crystal in the process (2) is performed by concentrating and heating the liquid added with the sulfuric acid in the process (1) to precipitate the alkali metal sulfuric acid salt crystal and performing solid-liquid separation in a state that the succinic acid is dissolved.

Inventors:

FUJITA ICHIRO
WADA KOICHI

Application Number:

JP2007185680A

Publication Date:

February 28, 2008

Filing Date:

July 17, 2007

Export Citation:

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Assignee:

SHOWA DENKO KK

International Classes:

C12P7/46; C07C51/43; C07C55/10

Domestic Patent References:

JP2005333886A	2005-12-08
JPH0330685A	1991-02-08
JPH03151884A	1991-06-28
JPS6051145A	1985-03-22

Foreign References:

WO1998001413A1

1998-01-15

Attorney, Agent or Firm:

Shunichiro Suzuki
Koji Makimura
Chihata Takahata

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