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1. WO1998024779 - PROCESS FOR CRYSTALLIZING D-ALPHA-TOCOPHERYL SUCCINATE

Publication Number WO/1998/024779
Publication Date 11.06.1998
International Application No. PCT/US1997/022615
International Filing Date 04.12.1997
Chapter 2 Demand Filed 01.07.1998
IPC
C07D 311/72 2006.1
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 [US]/[US]
Inventors
  • HAMLIN, Michael, David
  • CONNELLY, Richard, Wayne
Agents
  • MARTIN, Charles, R.
Priority Data
08/761,27606.12.1996US
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) PROCESS FOR CRYSTALLIZING D-ALPHA-TOCOPHERYL SUCCINATE
(FR) PROCEDE DE CRISTALLISATION DU D-$g(a)-TOCOPHERYL SUCCINATE
Abstract
(EN) Disclosed is a process whereby d-alpha-tocopheryl succinate (TS) can be crystallized in a short period of time by subjecting a fluid TS at particular temperature to a particular rate of shear for a particular time in order to accomplish crystallization. Then, while maintaining the crystallized TS at a temperature less than its melting point, we withdraw the crystallized TS from the region of shear flow. In a preferred embodiment of our process, crystallization is enhanced by use of a particular elongational rate for a particular time.
(FR) La présente invention concerne un procédé permettant de cristalliser en peu de temps le D-$g(a)-tocophéryl succinate (TS) en soumettant le TS fluide à cisaillement d'un taux spécifique, dans des conditions de température spécifiques pendant une durée spécifique, jusqu'à obtention de la cristallisation. Ensuite, tout en maintenant le TS cristallisé à une température inférieure à son point de fusion, le procédé consiste à soutirer le TS cristallisé dans la région du flux de cisaillement. Selon une réalisation préférée, on augmente la cristallisation en appliquant un taux d'allongement particulier pendant une durée spécifique.
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