Method for removing benzene from effluent wash water in a two st

Details Method for removing benzene from effluent wash water in a two st Method for removing benzene from effluent wash water in a two st

1992-08-24

1993-12-21

McCarthy, Neil M.

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210708, 208177, 208311, 208339, 208251R, B01D 1104, C10G 3108

Patent

active

052718417

ABSTRACT:
Methods of diminishing the benzene content of the effluent wash water in a two stage crude oil desalting system are disclosed. The first stage desalter is operated at "low", near ambient temperatures with decreased mixing of crude oil and wash water and increased addition of demulsifier. The second stage is operated at "hot" temperatures of prior processes with increased mixing of the crude oil and wash water. The effluent wash water has a substantially diminished benzene content compared to prior two-stage desalting systems.

REFERENCES:
patent: 3322664 (1967-05-01), Paterson et al.
patent: 4339330 (1982-07-01), Fujwara et al.
patent: 4415434 (1983-11-01), Hargreaves et al.
patent: 4556480 (1985-12-01), Cawi et al.
patent: 4645512 (1987-02-01), Johns
patent: 4806231 (1989-02-01), Chirinos et al.

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