Method of production of vitamin-d

Details Method of production of vitamin-d Method of production of vitamin-d

B - Operations, Transporting

01

J

204/91.05

B01J 19/08 (2006.01) C07C 172/00 (1980.01)

Patent

CA 1180679

TITLE METHOD OF PRODUCTION OF VITAMIN-D I N V E N T O R S Vincenzo Malatesta Clive Willis Peter A. Hackett ABSTRACT OF DISCLOSURE A method of upgrading a product containing a minor proportion of pre-vitamin d2 or pre-vitamin d3 and a major proportion of tachysterol comprising irradiating the product with laser light in the - wavelength range 330-360 nanometers to obtain a product containing ap- proximately 95% pre-vitamin -D2 or pre-vitamin -D3, and heating this product to convert the pre-vitamin -D2 or pre-vitamin -D3 to vitamin -D2 or vitamin -D3.

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