详细信息
文献类型:期刊文献
中文题名:由芳香族聚酯LCP废弃物回收4,4'-联苯二酚
英文题名:Preparation of 4,4′-Biphenol from LCP Waste by Hydrolysis Process
作者:耿龙[1];李忠辉[1];吴秋芳[1];马新胜[1];高玮[1]
机构:[1]华东理工大学化工学院国家超细粉末工程研究中心,上海200237
年份:2013
卷号:30
期号:2
起止页码:213
中文期刊名:精细化工
外文期刊名:Fine Chemicals
收录:CSTPCD;;Scopus;北大核心:【北大核心2011】;CSCD:【CSCD2013_2014】;
语种:中文
中文关键词:LCP;联苯二酚;水解;回收;精细化工中间体
外文关键词:LCP ;4,4'-biphenol ; hydrolysis ; recover; fine chemical intermediates
摘要:以1,4-二氧六环为溶剂,NaOH为催化剂,对废弃的含4,4'-联苯二酚(BP)单元的芳香族聚酯型液晶高分子(LCP),在常压下通过水解反应回收制备4,4'-联苯二酚进行了研究。在反应混合物的质量比m(LCP)∶m(溶剂)∶m(H2O)∶m(NaOH)=1∶4∶1.5∶0.6的最优条件下,液晶高分子的水解率达97%以上。通过在水解液中加入HCl并控制其pH在8.5,沉淀得到4,4'-联苯二酚。4,4'-联苯二酚经水洗、干燥、甲醇重结晶后,液相色谱检测其纯度可达99.9%,从废弃液晶高分子中制备4,4'-联苯二酚的收率为70%。
In this paper, 4,4'-biphenol (BP) was prepared from LCP ( PHBA-BP-PTA terpolymer) waste by hydrolysis process under atmospheric pressure using NaOH as catalyst, 1,4-dioxane and water as solvent. The effects of catalyst and solvent on hydrolysis reaction were studied. Under the optimum conditions of reaction temperature 100 ~C ,reaction time 8 h and ratio of reaction mixture:m(LCP):m (solvent) : m ( H20 ) : rn ( NaOH ) = 1:4:1.5 : 0. 6, the hydrolysis efficiency of the LCP was over 97 %. With the addition of HC1 in the hydrolysate until pH = 8.5,4,4'-biphenol precipitation was formed. After 4,4'-biphenol was washed with water, dried and recrystallized in methanol, its purity could reach 99.9%. The yield of 4,4'-biphenol from the LCP waste was 70%.
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