Sulfonation of crude oils with gaseous SO.sub.3 to produce petro

Details Sulfonation of crude oils with gaseous SO.sub.3 to produce petro Sulfonation of crude oils with gaseous SO.sub.3 to produce petro

1980-08-22

1985-12-24

Siegel, Alan

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260504R, 260513T, C07C13900, C07C14324

Patent

active

045605173

ABSTRACT:
Petroleum sulfonates are obtained by continuously contacting whole crude oil or topped crude oil with gaseous sulfur trioxide (contains as a diluent sulfur dioxide and light hydrocarbon vapor) in a reaction zone operated at a temperature of 120.degree.-250.degree. F. and a pressure of 3-50 psia. The reaction product is then passed to a vapor-liquid separating stage where a vapor stream is separated and a portion of it is recycled back to the reaction zone; a liquid stream is separated from the separating stage and a portion of it is recycled back to the reaction zone. The remaining portion of the liquid stream is neutralized with a monovalent inorganic base to obtain the petroleum sulfonate. The petroleum sulfonates are particularly useful to recover crude oil from subterranean reservoirs.

REFERENCES:
patent: 3215628 (1965-11-01), Peacock
patent: 3270038 (1966-08-01), Marshall
patent: 3302713 (1967-02-01), Ahearn

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