Partial hydrogenation of poly-unsatd. fatty acid to mono-unsatd. acid - using catalyst prepd. by adding alkali carbonate to soln. of copper and zinc salts, and sepg., drying and calcining ppte.

摘要

In prepn. of singly unsatd. fatty acids or derivs. by catalytic hydrogenation of poly-unsatd. fatty acids or derivs., the partial hardening is in presence of a catalyst obtd. by (a) adding alkali carbonates to aq. solns. of water-sol. Cu(II) and Zn(II) salts, to pH 6-10, (b) sepg. and drying the ppte. of CuCO3 and ZnCO3, (c) calcining the dried catalyst at 400-600 deg.C for 1-60 mins., and (d) opt. bringing the calcined catalyst into the form of pieces. Aq. solns. of Cu(NO3)2 and Zn(NO3)2 are pref. brought to pH 6-10 with a soln. of Na2CO3, and the ppte. is sepd., dried, calcined, and opt. brought into piece form. Partial hardening is at 100-250 deg.C and 1-50 bars, using 0.1-10 wt.% of catalyst, w.r.t. fatty acid or deriv., with linoleic acid or its esters with 1-4C alkanols or glycerol, or natural fats or oils rich in linoleic acid, or linolyl alcohol as raw material. USE/ADVANTAGE - Technical fatty acids or derivs. with above 60% (above 70%) of oleic acid are used in the cosmetic industry, in petroleum prodn., and in the textile industry. The hydrogenation is highly selectived)