1614. ------. [I. G. FARBENINDUSTRIE, A. G.] [Working Up the Products of a Carbon Monoxide-Hydrogen Conversion.] German Patent Appl. I 73,341. OZ 13,710. filed Oct. 10. 1942 (Cl. IV d-12 o.) FIAT Reel 170. frames 9,177-9,185: PB 64,181: Meyer Transl.

PATENTS

1614. ------. [I. G. FARBENINDUSTRIE, A. G.] [Working Up the Products of a Carbon Monoxide-Hydrogen Conversion.] German Patent Appl. I 73,341. OZ 13,710. filed Oct. 10. 1942 (Cl. IV d-12 o.) FIAT Reel 170. frames 9,177-9,185: PB 64,181: Meyer Transl. PC-S-II. Fischer-Tropsch, vol. 6. chap. 177. 1949. p. 40.

In a process for working up the conversion products of CO and H₂, especially those that contain both multibranched and liquid or solid oxygenated hydrocarbons, the products are separated into fractions of different boiling points by a series of distillations, the 1^st at normal pressure, the next at diminished pressure, and the 3^rd a steam distillation under diminished pressure. The material is kept in brisk circulation and in at least 1 spot in the evaporation is introduced in a very thin layer or in a state of fine division. Vacuum distillation may not be introduced until the distillate has a drop point of at least 50º and preferably 70º.