JPS5611798A - Purification of dicarboxylic acid - Google Patents
Purification of dicarboxylic acidInfo
- Publication number
- JPS5611798A JPS5611798A JP8644379A JP8644379A JPS5611798A JP S5611798 A JPS5611798 A JP S5611798A JP 8644379 A JP8644379 A JP 8644379A JP 8644379 A JP8644379 A JP 8644379A JP S5611798 A JPS5611798 A JP S5611798A
- Authority
- JP
- Japan
- Prior art keywords
- dicarboxylic acid
- solution
- smaller
- larger
- heating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Preparation Of Compounds By Using Micro-Organisms (AREA)
Abstract
PURPOSE: To improve the efficiency of water separation from a dicarboxylic acid in filtration and to make the separation through filtration easy, by heating a fermented solution, from which microbial cells are separated previously, while keeping the pH of the solution not smaller than 7, followed by adding an inorganic acid so that its pH is lowered to not larger than 4.0 to precipitate the crystal of the dicarboxylic acid.
CONSTITUTION: A microbial cell is removed from a fermented solution, which is heated in a pH not smaller than 7.0. An inorganic acid is added to the solution to make pH not larger than 4.0 so that the crystal of the dicarboxylic acid is precipitated and separated. Thus, the dicarboxylic acid is purified. The pH in heating the solution is preferably 7.5W10.0. The inorganic acid preferably adjusts pH of the solution to not larger than 3.0. After the dicarboxylic acid is added to the hot treated solution, it is heated at a temperature not lower than the melting point of the dicarboxylic acid so that the dicarboxylic acid is partly dissolved and partly melted in the fermented solution, and it is preferably cooled. The heating treatment is preferably carried out at a reflux temperature under normal pressure in pH not smaller than 7.0.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8644379A JPS5611798A (en) | 1979-07-10 | 1979-07-10 | Purification of dicarboxylic acid |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8644379A JPS5611798A (en) | 1979-07-10 | 1979-07-10 | Purification of dicarboxylic acid |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5611798A true JPS5611798A (en) | 1981-02-05 |
Family
ID=13887053
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8644379A Pending JPS5611798A (en) | 1979-07-10 | 1979-07-10 | Purification of dicarboxylic acid |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5611798A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4904389A (en) * | 1987-06-19 | 1990-02-27 | Henkel Kommanditgesellschaft Auf Aktien | Process for the separation of dicarboxylic acids |
-
1979
- 1979-07-10 JP JP8644379A patent/JPS5611798A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4904389A (en) * | 1987-06-19 | 1990-02-27 | Henkel Kommanditgesellschaft Auf Aktien | Process for the separation of dicarboxylic acids |
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