关键词: 破乳剂, 原油, 电脱盐

Abstract: When processing Kazakhstan crude oil with high salt content, demulsifier was preferred to be used during crude oil desalting. Screening tests of various demulsifiers were carried out by static and dynamic electrical desalting simulated site conditions, and two optimum demulsifiers, SH992 and GT922, were selected for commercial trial. The trial was conducted on the third crude oil distillation unit of Dushanzi Petrochemical Company, and the results showed that using SH992 or GT922 as demulsifier with a dosage of 25mg/L, under the conditions of a water injection amount of 4%, an electrical desalting temperature of 130℃ and an electric intensity of 800KV/cm, the salt content of the desalted crude oil was less than 3 mg/L, meeting the trade target of PetroChina.

Key words: demulsifier, crude oil, electrostatic desalting