| 摘要 |
A method for the preparation of free-flowing calcium salts of highly unsaturated fatty acids, which includes the steps of (a) providing a fatty acid feedstock consisting essentially of: (i) from about 50 to about 95% by weight of unsaturated C:16-C-22 fatty acids; (ii) from about 5 to about 40% by weight of saturated C: 14-C 22 fatty acids; and (iii) no more than about 6% by weight of moisture, insolubles and unsaponifiables, with no more than about 20% by weight of the unsaturated feedstock being in the form of glycerides; (b) adding to the unsaturated feedstock from about 1.0 to about 2.5 equivalents of calcium oxide relative to the unsaturated feedstock, so that a reactive admixture is formed; and (c) adding to the reactive admixture from about 2 to about 5 equivalents of water relative to the calcium oxide, so that the calcium oxide hydrates and neutralizes the fatty acids to form the calcium salts; provided that when less than 1.75 equivalents of calcium oxide is added, the unsaturated feedstock comprises at least 25% by weight of the saturated fatty acids and is heated to a temperature above its melting point before the step of adding the calcium oxide. Highly unsaturated fatty acid calcium salts prepared by this method are also disclosed.
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