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1. CA2273099 - PROCESS FOR CRYSTALLIZING D-ALPHA-TOCOPHERYL SUCCINATE

Office
Canada
Application Number 2273099
Application Date 04.12.1997
Publication Number 2273099
Publication Date 11.06.1998
Grant Number
Grant Date 21.01.2003
Publication Kind C
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
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[b]pyrans, not hydrogenated in the carbocyclic ring
58other than with oxygen or sulfur atoms in positions 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 an oxygen atom, e.g. tocopherols
Applicants EASTMAN CHEMICAL COMPANY
Inventors HAMLIN, MICHAEL DAVID
CONNELLY, RICHARD WAYNE
Priority Data 08761276 06.12.1996 US
Title
(EN) PROCESS FOR CRYSTALLIZING D-ALPHA-TOCOPHERYL SUCCINATE
(FR) PROCEDE DE CRISTALLISATION DU D-ALPHA-TOCOPHERYL SUCCINATE
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.