Liquid carbon dioxide extraction of pyrethrins

Details Liquid carbon dioxide extraction of pyrethrins Liquid carbon dioxide extraction of pyrethrins

1979-07-26

1981-07-28

Trousof, Natalie

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

Organic compounds

Carboxylic acid esters

C07C 6748

Patent

active

042811716

ABSTRACT:
Pyrethrum flowers are extracted with liquid carbon dioxide in suitable equipment to yield a pale, transparent, concentrated extract of pyrethrins. The extract is useful as the active material in safe insecticidal formulations. Alternatively, crude oleoresin produced by extraction of pyrethrum with organic solvents can also be purified by treatment with liquid carbon dioxide.

REFERENCES:
patent: 1595538 (1926-08-01), Yamamoto
patent: 1786967 (1930-12-01), Trevillian
patent: 1915662 (1933-06-01), Gnadinger
patent: 2050974 (1936-08-01), La Forge
patent: 2056438 (1936-10-01), Ward
patent: 2372183 (1945-03-01), Barthel
patent: 2376702 (1945-05-01), Komeda
patent: 2413107 (1946-12-01), Kuhn
patent: 2449671 (1948-09-01), Rhodes
patent: 2467859 (1949-04-01), Sankowsky
patent: 3042706 (1962-07-01), Haus
patent: 3083136 (1963-03-01), Levy
patent: 3333962 (1967-08-01), Prebluda
patent: 3835776 (1974-09-01), Mutsuo
patent: 3862174 (1975-01-01), Mizutani
patent: 3894073 (1975-07-01), Alexander
patent: 3973036 (1976-08-01), Hirano
patent: 4012194 (1977-03-01), Maffel
patent: 4024163 (1977-05-01), Elliott
Sax, "Dangerous Properties of Industrial Materials," 5th Ed., pp. 756 & 863 (1979).
Casida, "Pyrethrum the Natural Insecticide," pp. 25-53 (1973).
Schultz, Food Technology, 24, pp. 94-98 (1970).

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