Purification of saturated hydrocarbons

Details Purification of saturated hydrocarbons Purification of saturated hydrocarbons

1976-11-08

1978-08-22

Davis, C.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

208273, C07C 902

Patent

active

041089162

ABSTRACT:
Aerosol propellants from the class n-butane, isobutane and propane cause increased amounts of corrosion with greater than 5 parts per million unsaturates as impurities. Unsaturate levels are reduced below 5 parts per million, and preferably below 2 parts per million and most preferably below 1 part per million, by passing the saturated hydrocarbon containing unsaturated contaminants through a sulfuric acid scrubber for a length of time sufficient to remove unsaturated contaminants in excess of 5 parts per million and passing the outflow from the sulfuric acid scrubber through a basic demister to remove the sulfuric acid. The sulfuric acid scrubbing takes place in a column by liquid-liquid contact. The saturated hydrocarbon is then allowed to vaporize, and is passed successively through a basic demister and, if moist, a drying agent.

REFERENCES:
patent: 3168585 (1965-02-01), McCarthy
patent: 3254135 (1966-05-01), McCarthy et al.
patent: 3300539 (1967-01-01), Sherk
patent: 3370003 (1968-02-01), Borst
patent: 3591654 (1971-07-01), Newton
patent: 3979474 (1976-09-01), Zerrwick
Polgar et al., Organic Analysis, vol. 3, pp. 294-298.
Gehlawat et al., Chem. Eng. Science, 1968, vol. 23, pp. 1173-1180.
Kalichevsky et al., Petroleum Refining with Chemicals, Elsevier Pub. Co., New York, 1956, pp. 72-87.

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