吸附法脱除异戊烷中的3-甲基丁烯.pdf

石油化
2010年第39卷第2期
PETROCHEMICAL TECHNOLOGY
吸附法脱除异戊烷中的3-甲基丁烯
王丹丹,徐军,孟长功
(大连理工大学化学系,辽宁大连116024)
摘要了采用水溶液离子交换法制备了AgY和 AGMOR分子筛吸附剂,在固定床中考察了分子筛吸附剂种类及吸附温度、床层高
度、原料气流量等条件对脱除异戊烷中的3-甲基丁烯效果的影响。实验结果表明,AgY和 AGMOR分子筛保持原有的骨架结构;
AgY分子筛可作为脱除异戍烷中3-甲基丁烯的吸附剂;在20℃、0.1MPa、原料气流量为40mlL/min时,经过两次离子交换的
AgY(2)分子筛吸附剂的饱和吸附量为15mg/g;在固定床中,不可利用床层高度(LUB)与原料气流量有关,与床层高度无关,但
只有当床层高度超过LUB时,才有吸附效果;AgY分子筛吸附剂可脱附再生18次。
关键词]AgY分子筛吸附剂;离子交换;吸附法;3-甲基丁烯;异戊烷
文章编号]1000-8144(2010)02-0173-05[中图分类号]TQ028.15「文献标识码]A
Purification of Isopentane Containing 3-methyl-1-butene Through Adsorption
Wang Dandan, Xu Jun, Meng Changgong
Department of Chemistry, Dalian University of Technology, Dalian Liaoning 116024, China
Abstract] Both Agy and AGMOR molecular sieve adsorbents were prepared by ion exchange
method in water solution. Removal of 3-methyl-1-butene in Isopentane on the prepared Agy or
AGMOR molecular sieve adsorbent was investigated in a fixed-bed microreactor. Effects of adsorbent
type, adsorption temperature, bed height and feed gas flow rate on the adsorption were studied. Crystal
structures of both Y and MOR were maintained after Ag" exchange was carried out. The Agy
molecular sieve was a good adsorbent for adsorption of 3-methyl-1-butene in isopentane. Under
adsorption condition: 20 C, 0. 1 Mpa and feed gas flow rate 40 ml/min, saturated adsorption
capacity of the Agy molecular sieve was 115 mg/g. In the fixed-bed reactor, length of unused bed
(LUB was related with the gas flow rate but not with the bed height. The molecular sieve adsorbents
would be effective in the adsorption only when bed height was longer than LUB. The Agy molecular
sieve adsorbent could be regenerated and reused eighteen times for removal of 3-methyl-1-butene in
isopentane
Keywords] Agy molecular sieve adsorbent; ion exchange; adsorption; 3-methyl-1-butene;
isopentane
烯烃和烷烃的分离一直是石油化工行业中最时,C烯烃容易在分子筛上发生环化、裂解或异构化
重要和最耗能的过程之一。工业上通常采用低温等反应,生成的新物质或积碳易导致吸附剂失活。
精馏的方法进行分离,但运行费用很高〃,因此需
本工作采用离子交换法制备了AgY和 AGMOR
要硏究新型的烯烃和烷烃分离技术。基于πー络合分子筛吸附剂,用于固定床吸附脱除异戌烷中的
原理的化学吸附分离具有良好的应用前景2-?,受少量3-甲基丁烯,考察了分子筛吸附剂种类及吸
到国内外广泛关注。
附温度和原料气流量等因素对吸附3-甲基丁烯
C2和C3小分子的化学吸附分离已被广泛研的影响
究?,C3的吸附分离报道极少。从G烷烃中脱除
收稿日期]2009-08-31;修改稿日期]2009-11-09。
少量G烯烃,因两者的相对挥发度接近,采用精馏操『作者简介」王丹(98ー),女,江宁省大连市人,须士生,电邮
作難以达到分离要求。C烯烃的相对分子质量及动 wangdandan0o63cm。联系人:孟长功,电话0411-8470854
力学直径大,给吸附和脱附带来困难。同时高温脱附电邮 cgmeng@ dlut. edu. CI