C - Chemistry – Metallurgy – 10 – G
Patent
C - Chemistry, Metallurgy
10
G
134/56
C10G 33/04 (2006.01)
Patent
CA 1233390
ABSTRACT OF THE DISCLOSURE 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 4,500 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.
467346
Lacy Sylvia M.
Merchant Philip Jr.
Borden Ladner Gervais Llp
Exxon Research And Engineering Company
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