| 摘要 |
Liquid hydrocarbons are made electrically conductive by the presence of a chromium alkylsalicylate-the alkyl having at least 8 carbon atoms-prepared from the corresponding alkali metal salt and a trivalent chromium halide and after-treated with an oxidizing agent at over 100 DEG C. In the example, gasoline compositions contain 0,0001% each of calcium dioctyl sulphosuccinate and chromium C14-18- alkylsalicylate, the latter having been after-treated with Cr(NO3)3, nitromethane, nitronaphthalene, or with H2O2 and/or nitrobenzene.ALSO:A chromium alkylsalicylate, wherein the alkyl substituent has at least 8 carbon atoms, is prepared by reacting the corresponding alkali metal salt with at least a stoichiometric amount of a halide of trivalent chromium, the reaction product being heated over 100 DEG C. in presence of an oxidising agent, e.g. nitromethane, nitrobenzene, nitrotoluene, nitronaphthalene, hydrogen peroxide or chromium nitrate. The oxidising agent is preferably a mixture of hydrogen peroxide and nitrobenzene; the halide may be a bromide, but CrCl3 is preferred. In the example, the alkali metal alkylsalicylate is prepared by alkylating phenol with a C14-18 olefin mixture (from cracking paraffin wax) in presence of ZnCl2-HCl; the alkylphenol was converted to the sodium salt which was reacted with CO2 in xylene.
|
