Water based demulsifier formulation and process for its use in d

Details Water based demulsifier formulation and process for its use in d Water based demulsifier formulation and process for its use in d

1984-07-18

1985-11-05

Gantz, D. E.

Mineral oils: processes and products

Refining

Water removal

208187, 210718, 210728, 210729, 210732, 210748, 252358, C10G 3302, C10G 3304

Patent

active

045512396

ABSTRACT:
Oil is dehydrated and/or desalted by the influence of a dewatering and desalting formulation which can be characterized as an admixture of (i) a demulsifier preferably an alkylene oxide alkyl phenol-formaldehyde condensate such as a poly ethoxylated nonylphenol-formaldehyde condensate and (ii) a deoiler which is usefully a polyol such as ethylene glycol or poly (ethylene glycol) of Mw ranging from 106 to 44,000 and preferably ethylene glycol.
The aqueous formulation may usefully contain a cosolvent such as isopropanol. The surface active agent composition is admixed with the salt-containing oil which has been emulsified with water, and heated whereby the formulation of surface active agents aids in breaking of the emulsion and transfer of salts to the aqueous phase preferably after passage through an electric coalescer whereby a clean oil product suitable for use in refining operations is recovered with remarkably low oil carry under with the effluent water when ethylene glycol is formulated into the system as the deoiler.

REFERENCES:
patent: 4175054 (1979-11-01), Tait et al.
patent: 4183821 (1980-01-01), Langdon et al.
patent: 4209374 (1980-06-01), Martin
patent: 4309306 (1982-01-01), Blair, Jr.
patent: 4411775 (1983-10-01), McCoy et al.
patent: 4416754 (1983-11-01), Merchant, Jr. et al.
patent: 4439345 (1984-03-01), Duke
H. L. Greenwald, G. L. Brown, and M. N. Fineman, "Determination of the Hydrophile-Lipophile Character of Surface Active Agents and Oils by a Water Titration", Analytical Chemistry, vol. 28, No. 11, Nov. 1956, pp. 1693-1697.

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