[EN] PROCESS FOR THE PREPARATION OF 1,4-CYCLOHEXANEDIMETHANOL<br/>[FR] PROCÉDÉ DE PRÉPARATION DE 1,4-CYCLOHEXANEDIMÉTHANOL
申请人:EASTMAN CHEM CO
公开号:WO2013019439A1
公开(公告)日:2013-02-07
Disclosed is a process for the preparation of 1,4-cyclohexanedimethanol from terephthalic acid. Terephthalic acid is esterified with (4-methylcyclohexyl)methanol and the terephthalate ester hydrogenated to 1,4-cyclohexanedimethanol in a 2-stage process. The (4-methylcyclohexyl)methanol that is formed during the hydrogenation step is recycled to the esterification reaction. After removal of the (4- methylcyclohexyl)methanol from the crude hydrogenation product, the 1,4- cyclohexanedimethanol product can be recovered and purified by a phase separation and distillation.
揭示了一种从对苯二甲酸制备1,4-环己二甲醇的过程。对苯二甲酸与(4-甲基环己基)甲醇酯化,然后将对苯酸酯在两阶段过程中加氢转化为1,4-环己二甲醇。在加氢步骤中形成的(4-甲基环己基)甲醇被回收到酯化反应中。在从粗加氢产物中去除(4-甲基环己基)甲醇后,可以通过相分离和蒸馏来回收和纯化1,4-环己二甲醇产品。