梯度冷却尿素络合法分离费-托合成油中正构烷烃

石油炼制与化工 ›› 2021, Vol. 52 ›› Issue (5): 31-35.

梯度冷却尿素络合法分离费-托合成油中正构烷烃

于婉秋¹,韩冬云¹,乔海燕¹,石薇薇¹,曹祖宾¹,于婕²

1. 辽宁石油化工大学石油化工学院
2. 中国石油抚顺石化公司石油二厂

收稿日期:2020-11-06 修回日期:2020-11-27 出版日期:2021-05-12 发布日期:2021-04-23
通讯作者: 韩冬云 E-mail:hdy_mailbox@163.com
基金资助:
辽宁省教育厅基本科研项目

SEPARATION OF n- ALKANES PARAFFINS FROM FISCHER-TROPSCH SYNTHETIC OILS BY GRADIENT COOLING UREA COMPLEXING METHOD

Received:2020-11-06 Revised:2020-11-27 Online:2021-05-12 Published:2021-04-23
Contact: yun donghan E-mail:hdy_mailbox@163.com

摘要/Abstract

摘要： 以费-托合成馏分油为原料，采用梯度冷却尿素络合法对正构烷烃进行分离，生产煤基费-托合成液体石蜡，考察了降温速率和络合反应条件对正构烷烃分离效果的影响，并采用气相色谱-质谱联用仪、详细烃组成分析等方法对产物的组成进行分析，结果表明：当反应体系的温度由45 ℃以1 ℃/min的速率下降至25 ℃，尿素异丙醇水溶液与油的质量比为10:1，尿素、异丙醇、水的质量比为38:40:22时，经馏分切割得到的重质液体石蜡中正构烷烃质量分数为93%左右，其各项性质满足NB/SH/T 0416-2014质量标准要求；与传统冷却尿素络合法相比，梯度冷却尿素络合法的液体石蜡产品纯度和正构烷烃回收率均大幅提高。

关键词: 梯度冷却, 尿素络合, 费-托合成油, 液体石蜡

Abstract: With Fischer-Tropsch synthetic distillates as raw materials, a gradient cooling urea complexing method was used to separate n-alkanes to produce liquid paraffin from coal-based Fischer-Tropsch synthesis. The results showed that when the temperature of the reaction system decreased from 45 °C to 25 °C at the rate of 1 °C/min, the mass ratio of urea isopropanol aqueous solution to oil was 10:1, and the mass ratio of urea, isopropanol and water was 38:40:22, the mass fraction of n-alkanes in heavy liquid paraffin was about 93% , and its properties could meet the requirements of NB/SH/T 0416-2014 quality standard. Compared with traditional cooling urea complexing method, gradient cooling urea complexing method could greatly improve the purity of liquid paraffin product and the recovery of n-alkanes.

Key words: gradient cooling, urea complexing, F-T synthetic oil, liquid paraffin

于婉秋韩冬云乔海燕石薇薇曹祖宾于婕. 梯度冷却尿素络合法分离费-托合成油中正构烷烃[J]. 石油炼制与化工, 2021, 52(5): 31-35.

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