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HIGHLY EFFICIENT SEPARATIVE REFINING OF USEFUL COMPOUNDS IN COAL TAR

煤焦油中有用化合物的高效分离精炼

基本信息

批准号：
03555173
负责人：
MOCHIDA Isao
金额：
$ 8.9万
依托单位：
KYUSHU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (B)
财政年份：
1991
资助国家：
日本
起止时间：
1991 至 1993
项目状态：
已结题

项目摘要

Useful compounds such as polyaromatic hydrocarbons (naphthalene, methylnaphthalenes, anthracene, pyrene, fluoranthene and so on) and hetercoyclic compounds (quinoline, isoquinoline, acridine, benzothiophene and so on) were separated from coal tar fractions by combining solvent extraction and adsorption techniques using supported metal sulfates and a series of extraction solvents such as hexane, benzene, methanol and supercritical CO^2.Main research results are as follows ;1) Crude methylnaphthalene oil (CMNO) was effectively denitrogenated by adsorptive separation with 10 wt% Al^2(SO^4)^3 supported on silica gel of high surface area(Al/Si) and fractional extraction wiht hexane and benzene. Nitrogen compounds of quinoline and isoquinoline were concentrated and recovered in the benzene-eluted fraction at the same time.2) The same techniques as described above were applied to the selective separation of acridine from crude anthracene oil, providing an important starting material for preparing 1,2,3,4-tetrahydro-9-aminoacridine of expected remedy for Altzheimer-like senile dementia.3) CMNO was more selectively and effectively denitrogenated by using the Al/Si adsorbent under supercritical CO^2 extraction conditions of 50ﾟC and 70 atm than the conventional extraction methods. Nitrogen compounds of quinoline and isoquinoline were more easily and efficiently recovered by higher pressure supercritical CO^2 and methanol washing.4) Benzothiophene (BT) was more selectively dimerized over tha Al/Si catalyst under supercritical CO^2 conditions of 100ﾟC and 70 atm than its catalytic reaction in atmospheric n-octane solutions. The dimer of BT can be separated from crude naphthalene fraction under the supercritical CO^2 conditions followed by selective dedimerization and etraction.

采用负载型金属硫酸盐和吸附技术相结合，从煤焦油馏分中分离出有用的化合物，如多环芳烃（萘、甲基萘、蒽、芘、荧蒽等）和杂环化合物（喹啉、异喹啉、吖啶、苯并噻吩等）。主要研究成果如下：1）高比表面积（Al/Si）硅胶负载10 wt% Al^2(SO^4)^3，通过吸附分离和正己烷分级萃取，对甲基萘原油（CMNO）进行有效脱氮。苯。苯洗脱馏分中的喹啉和异喹啉氮化合物同时得到浓缩和回收。2)采用与上述相同的技术从粗蒽油中选择性分离吖啶，为制备治疗阿尔茨海默样老年痴呆症的1,2,3,4-四氢-9-氨基吖啶提供了重要的起始原料。 3)在50°C、70 atm的超临界CO^2萃取条件下，使用Al/Si吸附剂比传统萃取方法更有选择性、更有效地脱除CMNO。通过高压超临界CO^2和甲醇洗涤，可以更容易、更有效地回收喹啉和异喹啉的氮化合物。4)在100℃、70atm的超临界CO^2条件下，与常压正辛烷溶液中的催化反应相比，苯并噻吩(BT)在Al/Si催化剂上的二聚选择性更高。 BT的二聚体可以在超临界CO^2条件下从粗萘馏分中分离出来，然后进行选择性脱二聚和萃取。