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1. MXPA/a/1999/005208 - PROCESS FOR CRYSTALLIZING D-ALPHA-TOCOPHERYL SUCCINATE

Office
Mexico
Application Number PA/a/1999/005208
Application Date 04.06.1999
Publication Number PA/a/1999/005208
Publication Date 10.12.1999
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
Applicants ARCHER-DANIELS-MIDLAND COMPANY
Inventors MICHAEL DAVID HAMLIN
RICHARD WAYNE CONNELLY
Agents JAIME DELGADO R.
Priority Data 08761276 06.12.1996 US
Title
(EN) PROCESS FOR CRYSTALLIZING D-ALPHA-TOCOPHERYL SUCCINATE
(ES) PROCESO PARA CRISTALIZAR SUCCINATO DE D-ALFA-TOCOFERILO
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.
(ES) La presente invención se refiere:Se describe un proceso en donde puede ser cristalizado el succinato de d-alfa-tocoferilo (ST) en un periodo corto de tiempo sometiendo un ST fluido a una temperatura particular a una relación particular de esfuerzo cortante por un tiempo particular con el fin de realizar la cristalización. Después, mientras se mantiene el ST cristalizado a una temperatura menor de su punto de fusión, se extrae el ST cristalizado de la región de flujo de esfuerzo cortante. En una modalidad preferida de este proceso, se incremento la cristalización por uso de una relación elongacional particular por un tiempo particular.