239. ------. [BRAUNKOHLE-BENZIN, A. G.] [Wax Removal.] German Patent Appl. B 182,389, filed Mar. 15, 1938 (Cl. IV d-12 6). PB Rept. 412, May 15, 1945.

Patent Abstracts

239. ------. [BRAUNKOHLE-BENZIN, A. G.] [Wax Removal.] German Patent Appl. B 182,389, filed Mar. 15, 1938 (Cl. IV d-12 6). PB Rept. 412, May 15, 1945.

Extracting paraffin from synthesis catalyst by supplying vapors of a solvent, preferably synthesis oil, of such a boiling point that condensate therefrom is formed and flows down through the catalyst to extract the wax at a temperature >its melting point.