Document Type and Number:
Japanese Patent JPH0120140
Kind Code:
B2
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.
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Inventors:
MARUKU SHIMUSU
Application Number:
JP10142480A
Publication Date:
April 14, 1989
Filing Date:
July 25, 1980
Export Citation:
Assignee:
SIMS MARC
International Classes:
C07C69/743; A01N53/00; A01N65/00; B01D11/00; C07C67/58; C07C69/747
Next Patent: JPH0120141