Syntheses of long-chain acids. Part IX. Docosa-3,9,15- and -5,11,17-triynoic acids and eicosa-5,11,14-triynoic acid
作者:D. E. Ames、S. H. Binns
DOI:10.1039/p19720000255
日期:——
The acids named in the title, and also hexadeca-3,9-diynoic and eicosa-7,13-diynoic acids, which all contain acetylenic groups separated by a tetramethylene chain, have been synthesised. The methods employed involved alkylation of the NN-dimethylamide of a terminal acetylenic acid, or of an acetylenic alcohol, with final hydrolysis or oxidation, respectively. Eicosa-5,11,14-triynoic acid was prepared
COPPER AND ZINC ELUTION PREVENTING METHOD OF COPPER-ALLOY-MADE PLUMBING INSTRUMENT INCLUDING VALVE AND PIPE JOINT, COPPER-ALLOY-MADE PLUMBING INSTRUMENT USING THE METHOD, AND FILM-FORMING AGENT
申请人:SUGAYA Norikazu
公开号:US20120125458A1
公开(公告)日:2012-05-24
A method is provided for preventing copper and zinc from being eluted from a copper-alloy-made plumbing instrument that includes valves and pipe joints and suppresses copper and zinc from being eluted from the copper-alloy-made plumbing instrument while using for the plumbing instrument copper alloy as-is that includes bronze and brass, to provide a copper-alloy-made plumbing instrument using the method and to provide a film-forming agent. The method forms on at least a liquid-contact portion of the copper-alloy-made plumbing instrument a film of an organic substance comprising unsaturated fatty acid and coating with the film both copper and zinc in the surface layer of the liquid-contact portion of the plumbing instrument, thereby suppressing the elution of copper and zinc.