Water based demulsifier formulation and process for its use in dewatering and desalting crude hydrocarbon oils

Patent · Tue Nov 05 04:00:00 EST 1985

OSTI ID:5755453

Merchand, P; Lacy, S M

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 aklyl phenol-formaldehyde condensate such as a poly ethoxylated nonylphenol-for-maldehyde 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.

• Assignee: Exxon Research and Engineering Co.
• Patent Number(s): US 4551239
• OSTI ID: 5755453
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
ADDITIVES
ALCOHOLS
ALDEHYDES
ALKENES
ALKYL RADICALS
AQUEOUS SOLUTIONS
AROMATICS
CHEMICAL COMPOSITION
COLLOIDS
CONDENSATES
DEHYDRATION
DEMINERALIZATION
DEMULSIFICATION
DEMULSIFIERS
DESALINATION
DISPERSIONS
EMULSIONS
ENERGY SOURCES
ETHYLENE
FORMALDEHYDE
FOSSIL FUELS
FUELS
GLYCOLS
HEATING
HYDROCARBONS
HYDROXY COMPOUNDS
MIXTURES
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PETROLEUM
PHENOLS
POLYETHYLENE GLYCOLS
POLYMERS
PROPANOLS
RADICALS
SEPARATION PROCESSES
SOLUTIONS