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1. CN1239477 - Process for crystallizing d-alpha-tocopheryl succinate

Office
China
Application Number 97180212.2
Application Date 04.12.1997
Publication Number 1239477
Publication Date 22.12.1999
Publication Kind A
IPC
C07D 311/72
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
DHETEROCYCLIC COMPOUNDS
311Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings
02ortho- or peri-condensed with carbocyclic rings or ring systems
04Benzo pyrans, not hydrogenated in the carbocyclic ring
58other than with oxygen or sulfur atoms in position 2 or 4
70with two hydrocarbon radicals attached in position 2 and elements other than carbon and hydrogen in position 6
723, 4-Dihydro derivatives having in position 2 at least one methyl radical and in position 6 one oxygen atom, e.g. tocopherols
CPC
C07C 303/08
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
303Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides
02of sulfonic acids or halides thereof
04by substitution of hydrogen atoms by sulfo or halosulfonyl groups
08by reaction with halogenosulfonic acids
Applicants Eastman Chemical Co.
伊斯曼化学公司
Inventors M. D. Hamlin
M·D·哈姆林
R. W. Connelly
R·W·康奈利
Agents wu dajian
中国专利代理(香港)有限公司
Priority Data 08761276 06.12.1996 US
Title
(EN) Process for crystallizing d-alpha-tocopheryl succinate
(ZH) d-α-琥珀酸生育酚酯的结晶方法
Abstract
(EN) Disclosed is a process whereby d-alpha-tocopheryl succinate (TS) can be crystallized in a short period of time by subjecting a fluid TS at particular temperature to a particular rate of shear for a particular time in order to accomplish crystallization. Then, while maintaining the crystallized TS at a temperature less than its melting point, we withdraw the crystallized TS from the region of shear flow. In a preferred embodiment of our process, crystallization is enhanced by use of a particular elongational rate for a particular time.
(ZH)

本发明公开的是可在短的时间内使d-α-琥珀酸生育酚酯(TS)得以结晶的方法,为了完成结晶,在一特定的温度下使流体TS在一特定剪切速率下经历一特定的时间。然后在将结晶的TS保持在低于其熔点的温度下的同时,将结晶的TS从剪切流的区域中取出来。在该方法的一个优选实施方案中,通过使用一特定的时间的特定的伸长速率使结晶作用得到增强。