PATENTS

2766. REITSTÖTTER, —. (Metallgesellschaft A. G.). [Process for the Recovery of Alcohols.] German Patent Appl. M 147,073, PA 98,309, filed Feb. 13, 1940 (Cl. IV d-12 o). FIAT Reel B-196, frames 310-314; PB 83,253.

In separating mixtures of primary aliphatic alcohols and hydrocarbons obtained from the Fischer-Tropsch synthesis, there is added an excess, preferably up to 5 times the amount of alcohols in the mixture, of dehydrated CaCl2, which forms crystallized addition products of the alcohols, from which the hydrocarbons can be separated by means of solvents, by centrifuging, or by filtration. Example: 100 parts of a mixture, obtained by the hydrogenation of CO at temp. > 220° and pressure > 15 atm. in presence of a Co catalyst and consisting of 40% alcohols and 60% hydrocarbons, are stirred with 200 gm. of powdered, dehydrated CaCl2 and allowed to stand for 5 hr. After the portion b. >300° is separated and the temperature brought down to 45°, 50 parts of the original raw material is added and the crystallized addition product separated by centrifuging. The alcohols are then recovered therefrom by washing in an equal amount of warm H2O. A yield of 38 parts of alcohol having an OH number of 230 is obtained.