Demulsification of water-in-oil emulsions

Details Demulsification of water-in-oil emulsions Demulsification of water-in-oil emulsions

1985-09-27

1988-04-19

Terapane, John F.

Compositions

Preservative agents

Anti-corrosion

210708, 252358, B01D 1705

Patent

active

047387955

ABSTRACT:
Crude petroleum water-in-oil emulsions such as those produced by steam injection or water flooding in secondary oil well treatments (and other emulsions of this type) can be very effectively broken by the addition of water-insoluble, polar compounds selected from certain aliphatic carboxylic acids, alcohols, ketones including diketones, acetates, nitropropane, nitrobutane; and alkyl-substituted phenols; in small amounts up to about 8% by weight based on the emulsion. It was found that the number of carbon atoms in the aliphatic compounds and in the phenol's alkyl substituents must be within certain ranges for effective demulsification. The dispersed aqueous droplets, on treatment with the selected compound and appropriate agitation, come together to form an aqueous phase which can be separated. The additives can be recovered from the organic phase and recycled. Certain additive mixtures have been found very effective.

REFERENCES:
patent: 1689728 (1928-10-01), Johnson
patent: 2313621 (1943-03-01), Bruson
patent: 2485298 (1949-10-01), Leesemann
patent: 3884829 (1975-05-01), Moyer
Hackh's Chemical Dictionary, 3rd Ed., pp. 164, 481.

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