Process for producing succinic acid

Details Process for producing succinic acid Process for producing succinic acid

Filed on

2011-03-29

Date issued

2011-03-29

Examiner

Zucker, Paul A (Department: 1621)

Patent Class

Organic compounds -- part of the class 532-570 series

SubClass

Organic compounds

SubSubClass

Carboxylic acids and salts thereof

Other Related Categories

C562S593000

Type

Reexamination Certificate

Status

active

Patent number

07915447

Description

ABSTRACT:
The present invention is intended to provide a process capable of efficiently producing highly purified succinic acid from an alkali metal succinate by a simple separation and purification process. The process for producing succinic acid in the present invention comprises (1) the step to add sulfuric acid into a solution containing an alkali metal succinate, (2) the step to precipitate and remove the crystal of an alkali metal sulfate from said solution, and (3) the step to precipitate and recover the crystal of succinic acid. The removal of the crystal of an alkali metal sulfate in the step (2) is performed by a solid-liquid separation in a state that the crystal of alkali metal sulfate is precipitated by concentrating and heating the solution that is obtained by adding sulfuric acid in the step (1) and succinic acid is dissolved in the solution.

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