PATENTS

2702. PIRKLE, L. E. (Jasco, Inc.). Purified Soaps From Synthetic Fatty Acids. United States Patent 2,287,128, June 23, 1942. Chem. Abs., vol. 37, 1943, p. 277.

Describes arrangement of apparatus, and a process is employed that may involve subjecting a petroleum wax to limited catalytic oxidation in liquid phase to produce a crude oxidation product containing fatty acids, neutralizing these fatty acids with aqueous alkali to produce an aqueous solution having a soap content of about 20-40%, separating unsaponified and unsaponifiable matter from the resulting aqueous solution of crude soaps, heating the remaining aqueous solution of crude soaps in liquid phase to a temperature of about 275-325, and then subjecting the heated solution to flash vaporization to vaporize about 25-75% of H2O in the heated solution together with impurities therein, separately withdrawing the resulting vapors and recovering as the flash vaporization residue a concentrated aqueous solution of purified soaps.