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1. US5786491 - Process for crystallizing D-alpha-tocopheryl succinate

Office
United States of America
Application Number 08761276
Application Date 06.12.1996
Publication Number 5786491
Publication Date 28.07.1998
Grant Number 5786491
Grant Date 28.07.1998
Publication Kind A
IPC
C07D 311/04
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
C07D 311/00
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
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
Agents Martin Charles R.
Gwinnell Harry J.
Title
(EN) Process for crystallizing D-alpha-tocopheryl succinate
Abstract
(EN)

Disclosed is a process for 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.