重质馏份油微孔膜分散萃取脱酸工艺研究

介绍了利用微孔膜分散技术对克拉玛依环烷-中间基原油减四馏分油进行脱酸工艺研究结果。讨论了碱质量分数、脱酸温度、剂油质量比、连续相流量对脱酸效果的影响。研究结果表明，在连续相流通截面积为0.2cm2的膜分散萃取反应器中,当碱质量分数为6%～8%、脱酸温度为62～65℃、连续相流量为254～334g/min、剂油质量比为0.25左右时，对酸值为8.03mgKOH/g的原料油，脱酸率可达95%以上。脱酸后溶剂能够回收并同时得到石油酸，石油酸抽出率约在8.0%～8.5%，其粗酸值达90mgKOH/g左右，纯度在60%以上。

STUDY ON REMOVING NAPHTHENIC ACID FROM HEAVY DISTILLATES VIA MICROPOROUS MEMBRANE

Using microporous membrane to remove naphthenic acid from the 4th vacuum cut of Karamay naphthenic-intermediate base crude oil was introduced. The effect of parameters, such as alkali concentration, reaction temperature, the mass ratio of solvent to oil and flow rate of continuous phase, on the removal of acid was discussed. Results showed that using a membrane reactor with a cross section area of 0.2cm2 and a feed having an acid value of 8.03 mgKOH/g, under the conditions of an alkali concentration of 6%～8%, a reaction temperature of 62～65℃, a solvent/oil mass ratio of 0.25 and a continuous phase flow rate of 254～334 g/min, the acid removal rate could be more than 95%. The solvent and petroleum acid were recovered at the same time. The extraction rate of petroleum acid was about 8.0%～8.5% and the obtained petroleum acid had an acid value of 90 mgKOH/g and a purity of more than 60%.