公开(公告)号：US3887609A

公开(公告)日：1975-06-03

申请号：US45658474

申请日：1974-04-01

Applicant: TEXACO AG

Inventor： STREHLKE GUNTER ,  FRANZ WILHELM ,  OSTERBURG GUNTER

IPC: C07C69/54 ,  C07C20060101 ,  C07C67/02 ,  C07C67/03 ,  C07C67/62

CPC classification number: C07C67/03 ,  C07C67/62 ,  C07C69/54

Abstract: A process for the production of higher alkyl acrylates and methacrylates having reduced color numbers and containing minimum quantities of polymerization inhibitors and other impurities, wherein the alkyl chains contain 3 or more carbons, by the transesterification of methyl acrylate or methacrylate with alkanols of 3 or more carbons in the presence of a titanium alcoholate as transesterification catalyst and also in the presence of polymerization inhibitor combination and entraining agent for removing the methyl alcohol by-product. The transesterification is carried out by passing an oxygencontaining gas through the reaction mixture. In recovering the higher alkylacrylates or methacrylates the resultant reaction mixture is subjected to a steam distillation.

Abstract translation: 通过丙烯酸甲酯或甲基丙烯酸甲酯与3个或更多个链烷醇的酯交换，生产具有降低的颜色数量并含有最少量的聚合抑制剂和其它杂质的高级烷基丙烯酸酯和甲基丙烯酸酯的方法，其中烷基链含有3个或更多个碳 在作为酯交换催化剂的钛醇化物的存在下，还存在用于除去甲醇副产物的聚合抑制剂组合和夹带剂的存在下。 通过使含氧气体通过反应混合物进行酯交换。 在回收较高级烷基丙烯酸酯或甲基丙烯酸烷基酯时，将所得反应混合物进行蒸汽蒸馏。