加合结晶及其在对苯二甲酸残渣回收中的应用  

Application of adductive crystallization method for terephthalic acid recovery

作　　者：彭革[1,2] 郭霞[2] 成有为[2] 李希[2] 

机构地区：[1]宁波工程学院化工学院,浙江宁波315016 [2]浙江大学化学工程与生物工程学系,浙江杭州310027

出　　处：《化工进展》2010年第9期1630-1633,共4页Chemical Industry and Engineering Progress

基　　金：浙江省重大科技专项课题(2007C13037)

摘　　要：加合结晶是一种特殊的结晶分离方法。对苯二甲酸(TA)在某些酰胺类溶剂如N,N-二甲基乙酰胺(DMAC)中的溶解与结晶在恒温条件下即可自发进行,生成的新晶体是TA:DMAC(mol/mol)为1:2的溶剂化加合物,溶质与溶剂通过O—H…O的氢键作用结合。这种加合结晶具有高度的选择性,在20～70℃,单步结晶即可去除中纯度对苯二甲酸(MTA)残渣中90%～95%的有色杂质,是一种高效的残渣回收方法。Adductive crystallization is a special separation method.Terephthalic acid（TA）could be dissolved and re-crystallized in certain acylamide solvents such as N,N-dimethylacetamide（DMAC） spontaneously even at constant temperature,solvent adduct crystals could be formed with 1：2 molar ratio of TA and DMAC through hydrogen bonding.This adductive crystallization method showed a high selectivity in TA recovery from the TA residue of the single-step crystallization,through which the 90%—95% colored impurities initially contained in the residue could be removed.

关 键 词：加合结晶 对苯二甲酸 残渣回收 

分 类 号：TQ026.5[化学工程]