文献类型：专利

英文题名：Purifying feedstocks of carbon black comprises charging forward and backward dissolvent with benzene, toluene, alpha-methylnaphthalene, aminoethanol and propanone which carries solid-liquid separation to obtain coal tar

作者：ZHOU X;LIU D;QIN S

机构：[1]UNIV EAST CHINA SCI & TECHNOLOGY

申请号：CN1303185-C

公开日：2007-03-07

语种：英文

收录：DERWENT

摘要：NOVELTY - The process for purifying feedstocks of carbon black comprises charging forward dissolvent comprising benzene, toluene and alpha-methylnaphthalene or beta-methylnaphthalene into crude coal tar, wherein the weight ratio of the crude coal tar and the forward dissolvent is 1:0.1-3, after 0.5-1 hour, charging backward dissolvent comprising aminoethanol, propanone, isopropanol and phenylethene into the miscible liquid of the crude coal tar and the forward dissolvent, wherein the weight ratio of the crude coal tar and the backward dissolvent is 1:0.05-0.5, at a temperature of 10-60degreesC, pressure 0.1-0.1Mpa, sustaining 0.5-2 hours, carrying out solid-liquid separation to obtain the refined coal tar.