Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Patent
1976-07-14
1980-12-23
Lone, Werren B.
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
C07C 3770
Patent
active
042412277
ABSTRACT:
Gas condensates formed from the gases obtained from coal gasification, cokefication, or carbonization are extracted with an acid- and alkali-resistant solvent, e.g. organic esters or ethers, and phenols are thereby removed. The extract is separated into solvent and phenolic phases and the solvent is recycled to the extraction process. The same solvent is used in a greater quantity for a second stage treatment of the gas condensate to preferentially remove tar bases and again the solvent and tar base phases are separated with recycling of the solvent. Residual solvent, acid gases and other volatile components are removed from the gas condensate by distillation and/or stripping with the ammonia and acid gases being separately recovered. The gas condensate is thereafter subjected to biological cleaning, e.g. by a biological oxidation.
REFERENCES:
patent: 2595516 (1952-05-01), Doughty et al.
patent: 2675412 (1954-04-01), Herbert et al.
patent: 2807654 (1957-09-01), Grimmett et al.
patent: 3203874 (1965-04-01), Somerville
patent: 3277185 (1966-10-01), Eisenlohr et al.
Stonner Hans-Martin
Wiesner Paul
Wohler Fritz
Lone Werren B.
Metallgesellschaft Aktiengesellschaft
Ross Karl F.
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