Sulfonation of crude oils with gaseous so.sub.3 to produce...

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

E - Fixed Constructions

21

B

23/385, 31/8, 26

E21B 43/00 (2006.01) C07C 143/00 (1980.01)

Patent

CA 1117973

ABSTRACT OF THE DISCLOSURE 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 120-250°F. and a pressure of 3-50 p.s.i.a. The reaction product is then passed to a vapor-liquid separat- ing stage where a vapor stream is separated and a portion of it is recycled hack 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 sul- fonates are particularly useful to recover crude oil from subterranean reservoirs. cb/

212591

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