Process for crystallizing D-alpha-tocopheryl succinate

Details Process for crystallizing D-alpha-tocopheryl succinate Process for crystallizing D-alpha-tocopheryl succinate

1996-12-06

1998-07-28

Richter, Johann

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D31104

Patent

active

057864918

ABSTRACT:
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.

REFERENCES:
patent: 4683326 (1987-07-01), Orban et al.
patent: 5686632 (1997-11-01), Walsh
"Disruptive Processes in the Shear Crystallization of Poly(Ethylene Oxide)", Polymer Engineering and Science, Mar., 1976, vol. 16, No. 3, pp. 182-186.

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