摘要
设计合成了稳定性良好的Br?nsted-Lewis双酸型离子液体(3-磺酸)-丙基三乙基铵氯锌酸盐-[HO3S-(CH2)3-NEt3]Cl-Zn Cl2,并负载浓硫酸应用于催化异丁烷和异丁烯烷基化反应制备烷基化汽油。结果表明,负载少量浓硫酸的离子液体[HO3S-(CH2)3-NEt3]Cl-Zn Cl2对烷基化反应具有良好的催化性能,在离子液体[HO3S-(CH2)3-NEt3]Cl-Zn Cl2(n([HO3S-(CH2)3-NEt3]Cl)∶n(Zn Cl2)=1∶2)3.0 g,去离子水1.3 g,浓硫酸0.3 g,HC(异丁烷和异丁烯混合物)11.5 g,烷烯摩尔比为10∶1,反应温度40℃,反应时间1 h的较佳反应条件下,异丁烯转化率达到99.6%,三甲基戊烷TMP、二甲基己烷DMH和C9+(碳链超过9个碳的烷烃)选择性分别为84.8%,1.2%和14.0%。催化体系重复使用5次,异丁烯的转化率以及产物的选择性没有明显变化,表明催化剂具有良好的重复使用性能。
The alkylation reaction of isobutane and isobutylene to form alkylate petrol was studied over Br？nsted-Lewis acidic ionic liquids（ILs） mixtured with sulfuric acid. The results indicated that IL（3-sulfonic acid）-propyltriethylammonium chlorozincinate-[HO3S-（CH2）3-NEt3]Cl-Zn Cl2 mixtured with sulfuric acid had a good catalytic performance for the alkylation. The optimal reaction conditions were obtained as follows： IL [HO3S-（CH2）3-NEt3]Cl-Zn Cl2（n（[HO3S-（CH2）3-NEt3]Cl） ∶ n（Zn Cl2） = 1 ∶ 2）3. 0 g,water 1. 3 g,sulfuric acid 0. 3 g,HC（the mixture of isobutane and isobutylene） 11. 5 g,n（isobutene） ∶ n（isobutylene） = 10 ∶ 1,reaction temperature 40 ℃ and reaction time 1 h. Under the above reaction conditions,the isobutylene conversion reached 99. 6%,the selectivity of TMP,DMH and C9^＋（alkane with more than 9 carbon） was 84. 8%,1. 2% and 14. 0%,respectively. The reusability of the catalyst composed by IL and sulfuric acid was also investigated. The conversion of isobutene and selectivities of products did not obviously change when the catalyst was used for 5 times.
出处
《应用化工》
CAS
CSCD
北大核心
2015年第2期264-267,共4页
Applied Chemical Industry
基金
教育部博士点新教师基金(20113719120002)
山东省高等学校科技计划项目(J12LD16)
