The molecules capable of absorbing ultraviolet radiation from the cashew nut shell liquid changes are the object of the present invention; it is also described the compositions responsible for protecting the surfaces and chemical processes for the referred molecules production.
US4024106A
申请人:——
公开号:US4024106A
公开(公告)日:1977-05-17
US4697038A
申请人:——
公开号:US4697038A
公开(公告)日:1987-09-29
Metal extraction using a novel group of compounds and chemical
申请人:501 Brunel University
公开号:US04697038A1
公开(公告)日:1987-09-29
Compounds of the formula ##STR1## in which; X represents a straight chain hydrocarbyl group containing from 8 to 17 carbon atoms; Y represents H or the group--CH.dbd.NOH, and Z represents H or the group--CH.dbd.NOH or the group--CPh.dbd.NOH, provided that at least one of Y and Z represents H; or such compound containing at least one electronegative substituent in the aromatic ring, may be prepared from anacardic acid and its analogues, and are useful for the extraction of copper from acidic aqueous solution. Cardanol, which has the formula ##STR2## where n=0, 2, 4 or 6 is recovered from cashew nut shell liquid containing cardol and other dihydric phenols by reacting the dihydric phenols in the CNSL with an aldehyde while leaving the cardanol substantially unreacted, and vacuum distilling the cardanol from the reaction mixture.