Deacification of High Acid-Containing Crude by Solvent Extraction under Ultrasonic Irradiation

Abstract:

A compounded deacidificant was used for deacidification of domestic Bei-Jiang crude. In this work, its formulation was optimized in detail. Effect of reaction temperature, time and the ratio to crude oil was examined. Acceleration by using ultrasonic irritation in deacidification process was investigated. Our results revealed a deacificant composed of ethylene glycol as neutralization agent and cyclohexylamine as extraction solvent not only provided an excellent deacidificcation extent, but also no emulsion problem appeared. 30% cyclohexylamine-containing ethylene glycol solution has the best performance. Deacidification extent reached 85% and higher at a solvent and oil weight ratio of 15%.Ultrasonic wave played an accerleration role, resulting in a shorter reaction time. Naphthenic acids and solvent components were recovered by using vacuum distillation.The recovery rate for solvent components were 99.3% for ethylene and 96.6% for cyclohexylamine respectively. The purity of recovered naphthenic acids was rather high, reaching a acid value of 167.

• Periodical: Applied Mechanics and Materials (Volume 521)
• Pages: 638-643
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.521.638
• Online since: February 2014
• Authors: Hong Guan Wu*, Hai Feng Li, Guo Xian Yu
• Keywords: Cyclohexylamine, Deacidification: Ultrasonics, High Acid Crude

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