共查询到17条相似文献,搜索用时 125 毫秒
1.
2.
3.
烯烃氢甲酰化反应催化剂的研究进展 总被引:2,自引:0,他引:2
综述了烯烃氢甲酰化反应的催化剂体系 ,通过对发展较成熟的烯烃氢甲酰化均相催化体系缺点的分析 ,引入近 2 0年来发展起来的水溶性膦配体和过渡性金属配位生成的水 /有机两相催化体系 ,对其催化机理、优点和最新发展动态进行了评述 ;最后重点介绍了负载水相催化体系的组成、优点、水溶性配体和已报道的此类催化剂。 相似文献
4.
5.
6.
7.
氢甲酰化反应是目前生产醛醇化合物最重要的反应之一,高碳烯烃氢甲酰化工艺改进是研究的难点和热点之一。探索了一种C10烯烃氢甲酰化反应的工艺,以三苯基膦(Ph3P)和亚磷酸三(2-叔丁基-4-甲氧基苯基)酯(LA)混合物为配体,与乙酰丙酮二羰基铑原位合成的催化体系催化1-癸烯氢甲酰化反应。系统考察了反应温度、反应压力、铑浓度、膦铑比、无机盐添加剂对反应的影响。结果表明,在n(Ph3P)/n(LA)=10、铑质量分数为280 mg/kg,1-癸烯用量(相对于甲苯)为0.3 g/mL,n(膦)/n(铑)=45、反应温度为90 ℃、反应压力为2.0 MPa、n(一氧化碳)/n(氢气)=1条件下反应4 h,1-癸烯转化率为98.1%、醛收率为93.2%、正异比为7.5。研究还发现,在减压蒸馏产物与催化剂分离时,加入无机盐添加剂能够提高催化剂的稳定性,减少铑损失。 相似文献
8.
为了研究费-托α-烯烃的增值化利用,基于水溶性双膦铑催化剂HRh(CO)2(SulfoXantphos),通过添加表面活性剂构建煤基费-托α-烯烃水/有机两相氢甲酰化体系。考察表面活性剂的种类和用量、反应温度、合成气压力和磺化双膦配体、铑物质的量比对催化性能的影响,并研究催化体系的稳定性和普适性。结果表明:在优化的反应条件下,费-托α-烯烃的转化率和醛选择性分别达到96%和90%以上,正构醛与异构醛的物质的量比达20~50;且该催化体系具有良好的普适性和稳定性。证明水/有机两相催化体系具有在煤基费-托α-烯烃氢甲酰化中应用的潜力。 相似文献
9.
10.
本文综述了水溶性膦配体的合成和水溶性过渡金属络合物催化剂在水/有机溶剂两相体系中催化氢甲酰化反应的近期进展。 相似文献
11.
12.
Water-soluble ligands, tri[4-methoxyl-3-(sodium sulfonato)phenyl]phosphine (4-MOTPPTS) and tri[2-methoxyl-3-(sodium sulfonato)phenyl]phosphine (2-MOTPPTS) were synthesized and their application as ligand in Rh-catalyzed hydroformylation of higher olefin was investigated in aqueous biphasic catalytic system. The electron-donating methoxyl group of aromatic ring in phosphine ligand induced the decrease of the activity and selectivity for aldehyde of Rh catalyst than TPPTS used as ligand. The Rh catalyst with more crowded and basic 2-MOTPPTS showed lower activity than 4-MOTPPTS. 相似文献
13.
14.
15.
16.
17.
Zhengyu Chen Gang Wang Suoqi Zhao Linzhou Zhang 《American Institute of Chemical Engineers》2023,69(8):e18116
Petroleum catalytic pyrolysis to light olefin technology has received wide-ranging research interest in the refining industry. This work built a molecular kinetic model for the catalytic pyrolysis of a heavy gas oil from bitumen synthetic crude oil (SCO) to light olefins. A feedstock compositional model was constructed containing 1311 molecules using bulk properties information. A variety of reaction rules was summarized and digitized, and from which, a reaction network involving 2631 substances and 6793 reactions was generated via a reaction network autogeneration algorithm. The reaction network for the catalytic pyrolysis was transformed into reaction rate equations. Systematical pilot-scale catalytic pyrolysis experiments were carried out, which were used to regress the molecular kinetic model parameters. The tuned model is able to predict the product yield and molecular distribution. Moreover, a range of sensitivity analysis was performed, revealing the dependence of light olefins yields on the reaction conditions. 相似文献