3211..----- [RUHRCHEMIE, A. G.] [Treatment of Residues From Paraffin Oxidation.] German patent Appl. R 115,082, no date (Cl.12 0-11). Auszüge deut. Patent-Anmeldungen, vol. 6, p. 313.

PATENTS

3211..----- [RUHRCHEMIE, A. G.] [Treatment of Residues From Paraffin Oxidation.] German patent Appl. R 115,082, no date (Cl.12 0-11). Auszüge deut. Patent-Anmeldungen, vol. 6, p. 313.

Distillation residues from paraffin oxidation (oxide pitch) are worked up by repeated treatment at elevated temperature with sulfuric acid solutions of alkali bichromate.