Method of photochemical synthesis of vitamin Ds

Details Method of photochemical synthesis of vitamin Ds Method of photochemical synthesis of vitamin Ds

2007-05-01

2007-05-01

Wong, Edna (Department: 1753)

Chemistry: electrical and wave energy

Processes and products

Processes of treating materials by wave energy

Reexamination Certificate

active

10649287

ABSTRACT:
An enhanced photochemical method of making vitamin D includes irradiating a reaction mixture of precursor molecules with light having a wavelength of 254 nm and with light having a wavelength of 313 nm to produce previtamin D, and is followed by heating at a temperature not exceeding 100° C. to convert previtamin D to vitamin D.

REFERENCES:
patent: 4388242 (1983-06-01), Malatesta et al.
patent: 4686023 (1987-08-01), Stevens
patent: 6902654 (2005-06-01), Michishita et al.

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