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2 151 780

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IPC

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Application

99101928/04, 1999-02-02

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Start date

1999-02-02

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Actual filing date

1999-02-02

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Published

2000-06-27

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Inventor

Serebrjakov B.R.Safin D.Kh.Nurullina I.I.Belokurov V.A.Kolosov S.A.Atnjukov K.N.

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo

METHOD OF PREPARING DEMULSIFIER Russian patent published in 2000 - IPC

Abstract RU 2151780 C1

FIELD: crude oil treatment. SUBSTANCE: demulsifier for demulsification and desalting of crude oil, based on alkylene oxide block copolymers, is prepared by oxyalkylenation of glycol-containing substance with propylene oxide and ethylene oxide at high temperatures and pressure, said glycol-containing substance additionally containing oxyalkylenated amine and/or polyatomic alcohol and said alkylene oxides being taken in amount 0.5 to 50% based on total weight of glycol-containing substance. Resulting block copolymer has molecular weight 2000 to 10000 and is characterized by propylene oxide- to-ethylene oxide weight ratio from 50:50 to 80:20. EFFECT: increased demulsification efficiency in case of sulfur and high-sulfur crude oils with no loss in efficiency at higher temperatures. 2 cl, 3 tbl, 30 ex

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RU 2 151 780 C1

Authors

Serebrjakov B.R.

Safin D.Kh.

Nurullina I.I.

Belokurov V.A.

Kolosov S.A.

Atnjukov K.N.

Dates

2000-06-27—Published

1999-02-02—Filed

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