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Research on the production of dialkylpoylcondensed aromatic hydrocarbons

二烷基多缩合芳烃的生产研究

基本信息

批准号：
62550602
负责人：
OHNUMA Hiroshi
金额：
$ 1.28万
依托单位：
Akita University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1987
资助国家：
日本
起止时间：
1987 至 1988
项目状态：
已结题

项目摘要

Alkylation of naphthalene and 2-methylnaphthalene was performed, and their reaction products were analyzed in detail. The relation between reaction conditions and yield of products was investigated. Isomerization of dialkylnaphthalenes was also studied. Thiourea adductions of 2,6-diisopropylnaphthalene and of 2-methyl-6-t-butyl-naphthalene were examined in order to isolate 2,6-isomers from mixtures of dialkylnaphthalenes.Dialkylnaphthalenes were produced in alkylation of monoalkyl-naphthalenes, which were also obtained in the consecutive reactions of naphthalene with alkylating reagents. Preferable reaction conditions of alkylation, including the kind of alkylating reagents, reaction temperature, and reaction time, were suggested to produce 2,6- and 2,7-dialkylnaphthalenes in cooperation with the suitable reaction condition of isomerization.Thiourea adduction was well performed to isolate 2,6-dialkyl-naphthalene from the mixtures of dialkylnaphthalene isomers. Dialkylnaphthalenes of 2,6-isomers, more than 99 % of purity, were separated from corresponding mixtures by repeating 2 - 7 times of thiourea adduction.

对萘和2-甲基萘进行了烷基化反应，并对其反应产物进行了详细的分析。考察了反应条件与产物收率的关系。对二烷基萘的异构化也进行了研究。研究了2,6-二异丙基萘和2-甲基-6-t-丁基萘的硫脲加合物，以便从二烷基萘混合物中分离2,6-异构体。单烷基-萘烷基化制得二烷基萘，萘与烷基化试剂连续反应制得二烷基萘。提出了适宜的烷基化反应条件，包括烷基化试剂的种类、反应温度和反应时间，以及适宜的异构化反应条件，以制备2,6-和2,7-二烷基萘。从二烷基萘异构体混合物中分离2,6-二烷基萘时，硫脲内合反应良好。通过重复2 ~ 7次硫脲内合，从相应的混合物中分离出纯度大于99%的2,6-二烷基萘异构体。