Chemistry: molecular biology and microbiology – Micro-organism – tissue cell culture or enzyme using process... – Preparing oxygen-containing organic compound
Patent
1998-10-02
2000-02-29
Lilling, Herbert J.
Chemistry: molecular biology and microbiology
Micro-organism, tissue cell culture or enzyme using process...
Preparing oxygen-containing organic compound
435171, 435911, 568852, 568868, 568872, C12P 718, C12P 102, C07C 2726, C07C 3118
Patent
active
060308206
ABSTRACT:
A process for producing a high-purity erythritol crystal comprising a crystallization step of subjecting an erythritol-containing aqueous solution as a raw solution to crystallization, wherein an erythritol concentration of said erythritol-containing aqueous solution is adjusted to 30 to 60% by weight at the beginning of the crystallization step; said erythritol-containing aqueous solution is cooled at a cooling rate of not more than 20.degree. C./hour; a seed crystal of erythritol is added to said erythritol-containing aqueous solution in the course of the cooling, and the solution is cooled to not more than 20.degree. C. Such a process for producing a high-purity erythritol crystal of the present invention has a still higher purity and is further improved in crystal shape as compared to those produced by conventional processes.
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Abe Takahiro
Ishitsuka Hiroaki
Maeda Toshihiro
Morioka Satoshi
Sawada Katsuhiko
Lilling Herbert J.
Mitsubishi Chemical Corporation
Nikken Chemicals Co., Ltd.
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