Title:
PRODUCTION OF HIGHLY PURE ERYTHRITOL CRYSTAL
Document Type and Number:
Japanese Patent JP3904305
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for producing highly pure erythritol crystals, comprising processes successively containing a cell-separating process, a chromatographic separation process and a crystallization process and sufficiently improved so that solid impurities can efficiently and highly be removed in the cell-separating process.
SOLUTION: This method for producing highly pure erythritol crystals comprises separating and purifying the crystals in processes successively containing at least a cell-separating process for separating cells from an erythritol-containing culture solution as a law material solution, a chromatographic separation process for chromatographically separating a clear solution recovered from the cell-separating process, and a crystallization process for crystallizing an erythritol fraction recovered from the chromatographic separation process to deposit the erythritol crystals. Therein, in the cell- separating process, a cross flow filtration method with a ceramic membrane or an organic membrane is employed, and the temperature of the solution to be treated is maintained at a temperature of 50-90°C.
Inventors:
Satoshi Morioka
Takahiro Abe
Katsuhiko Sawada
Takahiro Abe
Katsuhiko Sawada
Application Number:
JP29028797A
Publication Date:
April 11, 2007
Filing Date:
October 07, 1997
Export Citation:
Assignee:
Mitsubishi Chemical Corporation
International Classes:
C12P7/18; C07C29/76; C07C29/78; C07C31/24; C12R1/645; (IPC1-7): C12P7/18; C07C29/76; C07C29/78; C07C31/24; //(C12P7/18; C12R1:645)
Domestic Patent References:
| JP1199583A | ||||
| JP7067673A |
Attorney, Agent or Firm:
Kazuhiko Okada