Process for reducing corrosive impurities in sulfolane used for

Details Process for reducing corrosive impurities in sulfolane used for Process for reducing corrosive impurities in sulfolane used for

1988-05-27

1989-08-29

Niebling, John F.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

2041824, 204186, B01D 1706, B03C 500, C02F 148

Patent

active

048614475

ABSTRACT:
A process is disclosed for reducing the level of corrosive impurities in sulfolane solution originating from a process for the extraction of aromatic hydrocarbons from petroleum, which process comprises providing an aqueous solution of sulfolane having a sulfolane concentration less than about 80% by weight and electrodialyzing said aqueous solution to obtain a diluate stream containing a great majority of the sulfolane and having greatly reduced level of corrosive impurities.

REFERENCES:
patent: 2996442 (1961-08-01), Eberly
patent: 3252997 (1966-05-01), Ridderikoff et al.
patent: 4177119 (1979-12-01), Watanabe
patent: 4501902 (1985-02-01), Cleary
Thompson Chem. Abst. 77:90966m (1972).
Thompson Chem. Abst. 76:07003j (1972).

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