[1]刘 北.固体酸催化碳四合成三甲基戊烷技术[J].大众科技,2020,22(11):52-55.
 Technology of Synthesis of Trimethylpentane from C4 Catalyzed by Solid Acid[J].Popular Science & Technology,2020,22(11):52-55.
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固体酸催化碳四合成三甲基戊烷技术()
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《大众科技》[ISSN:1008-1151/CN:45-1235/N]

卷:
22
期数:
2020年11
页码:
52-55
栏目:
出版日期:
2020-11-20

文章信息/Info

Title:
Technology of Synthesis of Trimethylpentane from C4 Catalyzed by Solid Acid
作者:
刘 北
(中油广西田东石油化工总厂有限公司,广西 田东 531599)
关键词:
碳四三甲基戊烷固体酸烷基化
Keywords:
C4 trimethylpentane solid acid alkylation
文献标志码:
A
摘要:
以碳四组分中的异丁烷和丁烯为原料、固体酸为催化剂,经烷基化反应合成清洁汽油理想调和组分三甲基戊烷。常用的固体酸大致可分为9种类型,其中沸石分子筛固体酸在烷基化反应过程应用较广泛,固体酸催化碳四烷基化反应具有节能环保、安全可靠、对设备无腐蚀性作用、催化剂与产物分离容易等优点。但固体酸存在酸量不足,催化性能不够稳定,容易失活且再生较困难。固体酸/离子液体复合催化剂具有酸量足,并通过加入过渡金属化合物ZnCl2进行改性,提高复合催化剂的活性与选择性,所制得烷基化汽油的辛烷值(RON)为98.2~102.0,选择性从39.60%提高至72.27%。固体酸烷基化过程主要有固定床和流化床工艺,两种工艺都采用边烷基化反应边进行催化剂再生处理,实现连续性生产。有关烷基化催化剂再生方法,正在研究开发超临界状态的再生技术。Topsoe固定床烷基化工艺是由丹麦Topsoe公司研发,采用SiO2负载活性组分三氟甲基磺酸为固体酸催化剂;Alkylene流化床烷基化工艺是由美国UOP公司研发,采用Pt-KCl-AlCl3/Al2O3为固体酸催化剂。
Abstract:
Using isobutane and butene in C4 components as raw materials and solid acid as catalyst, the trimethylpentane, which can be used as ideal blending component of clean gasoline, is synthesized through alkylation reaction. Commonly used solid acids can be roughly divided into 9 types. Among them, zeolite molecular sieve solid acids are widely used in the alkylation reaction process. The solid acid catalyzed C4 alkylation reaction is energy-saving, environmentally friendly, safe, reliable, and non-corrosive to equipment. And the catalyst is easy to separate from the product. However, the solid acid has drawbacks such as insufficient acidity, insufficient catalytic performance, easy deactivation, and difficult regeneration. The solid acid/ionic liquid composite catalyst has sufficient acid content and is modified by adding transition metal compound ZnCl2 to improve the activity and selectivity of the composite catalyst. The octane number (RON) of the obtained alkylated gasoline is 98.2~102.0. The selectivity increased from 39.60% to 72.27%. The solid acid alkylation process mainly includes fixed bed and fluidized bed processes. Both processes use the alkylation reaction and the catalyst regeneration treatment to achieve continuous production. Regarding the regeneration method of the alkylation catalyst, the technology of supercritical is being researched and developed. The Topsoe fixed-bed alkylation process was developed by the Danish Topsoe company, using SiO2 to support active component trifluoromethanesulfonic acid as the solid acid catalyst the Alkylene fluidized bed alkylation process was developed by the UOP company in the United States, using Pt-KCl-AlCl3/Al2O3 as a solid acid catalyst.

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备注/Memo

备注/Memo:
【收稿日期】2020-09-04 【作者简介】刘北,中油广西田东石油化工总厂有限公司经济师,从事石油化工技术与管理工作。
更新日期/Last Update: 2020-12-17