Compositions – Preservative agents – Anti-corrosion
Patent
1982-05-10
1985-06-11
Lovering, Richard D.
Compositions
Preservative agents
Anti-corrosion
252306, 252312, 426 73, 426540, B01J 1300
Patent
active
045227438
ABSTRACT:
Finely divided, pulverulent carotinoid or retinoid compositions, in which the carotinoid or retinoid essentially has a particle size of less than 0.5 micron, are prepared by a process wherein a carotinoid or retinoid is dissolved in a volatile, water-miscible, organic solvent at from 50.degree. C. to 200.degree. C., if necessary under superatmospheric pressure, within the space of less than 10 seconds. The carotinoid is immediately precipitated, in a colloidally disperse form, from the molecularly disperse solution by rapidly mixing the latter with an aqueous solution of a swellable colloid at from 0.degree. C. to 50.degree. C., and the resulting dispersion is freed from the solvent and the dispersing medium in a conventional manner.
REFERENCES:
patent: 2650895 (1953-09-01), Wallenmeyer et al.
patent: 3110598 (1963-11-01), Muller
patent: 3655406 (1972-04-01), Klaui
patent: 3734745 (1973-05-01), Cassanelli et al.
patent: 3790688 (1974-02-01), Walter et al.
patent: 4316917 (1982-02-01), Antoshkiw et al.
Chemical Abstracts, vol. 83, No. 11, (1975), p. 414, No. 176994e.
Ditter Walter
Hartmann Horst
Horn Dieter
Lueddecke Erik
Schmidt Hans W.
BASF - Aktiengesellschaft
Brookes Anne
Lovering Richard D.
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