Desulfurization of Diesel by Hy droperoxide Organic Acid Oxidation System

Abstract

Abstract:

The combination process of oxidization and ex traction separation w as carried out for investigating the desulfurization of Liaohe straight run diesel.Peroxy acid prepared with hydrogen peroxide and formic acid w as used as oxidation reagent, which sulfur -containing compounds in diesel can be converted to the corresponding sulfates having strong polarity .According to the rule that the like dissolves each other , DMF w as an effective solvent for extracting such sulfates from diesel, so were the sulfur compounds removed .The operating parameters w ere studied, such as reaction time, the oxidation temperature, volumic ratio of oxidant to oil and ultrasonic energy .And the suitable operating conditions of the labor a torial experiment are :reaction time is 60 minutes;reaction temperature is 70 ℃;volumic ratio of oxidant to oil is 1∶10;use o f ultrasonic energy , under which the desulfurization rate is 67 .5 % which meets the state , s requirements for sulfur contents in diesel.

Key words: N, N -dimethylfo rmamide, Diesel fuel, Desulfuriation, Oxidation , Ex traction separation

摘要： 通过氧化反应与溶剂萃取分离相结合的方法对辽河直馏柴油氧化脱硫。双氧水与甲酸作为氧化剂反应生成的过氧酸, 可以把柴油中的含硫化合物有选择性地氧化成相应的具有很强极性的砜。根据相似相溶原理, 使用极性溶剂N , N -二甲基甲酰胺(DMF)将这些砜从柴油中脱除, 从而降低油品中的硫含量。考察了反应时间、氧化温度、剂油体积比、超声波等反应条件对脱硫率的影响。结合生产实际, 确定了实验室最佳操作条件:反应时间为60 min ;反应温度为70 ℃;剂油体积比为1∶10;超声波作用利于氧化脱硫。结果表明, 在最佳实验条件下, 脱硫率可达67 .5 %, 基本满足国家标准的要求。

关键词: N , N -二甲基甲酰胺, 柴油, 脱硫, 氧化, 萃取分离

YUAN Qiu -ju,ZHAO De -zhi,et al. Desulfurization of Diesel by Hy droperoxide Organic Acid Oxidation System[J]. Journal of Liaoning Petrochemical University, 2005, 25(1): 33-35.

袁秋菊, 赵德智,李　英, 王玉新. 用H₂O₂ -有机酸氧化脱除柴油中的硫化物[J]. 辽宁石油化工大学学报, 2005, 25(1): 33-35.

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