3644. ----- [STILL, C.] [Recovering Hydrocarbons.] German Patent Appl. st 63783, no date (Cl. IV d-12 o). Auszüge deut. Patent-Anmeldungen, vol. 6, p. 369.

PATENT

3644. ----- [STILL, C.] [Recovering Hydrocarbons.] German Patent Appl. st 63783, no date (Cl. IV d-12 o). Auszüge deut. Patent-Anmeldungen, vol. 6, p. 369.

Hydrocarbons with 2.3 and 4 C atoms are recovered by adsorption in steps by means of low-boiling hydrocarbons.