[EN] PROCESS FOR PREPARING CARBOXYLIC ACID ESTERS IN THE PRESENCE OF A TITANIUM-CONTAINING CATALYST<br/>[FR] PROCÉDÉ DE PRÉPARATION D'ESTERS D'ACIDES CARBOXYLIQUES EN PRÉSENCE D'UN CATALYSEUR CONTENANT DU TITANE
申请人:SIBUR HOLDING PUBLIC JOINT STOCK CO
公开号:WO2016043616A1
公开(公告)日:2016-03-24
The present invention relates to a process for preparing carboxylic acid esters, comprising esterification of a carboxylic acid with an alcohol in the presence of a titanium-containing catalyst selected from compounds of a general formula, Tin(OR)x(OR')xOy, wherein n is an integer from 1 to 4; у is an integer from 0 to 6; x can be the same or different and is an integer from 2 to 8; R is a linear or branched C1-C18alkyl, C3-C18cycloalkyl, R' is aryl optionally comprising an electron-donor substituent; or a mixture thereof, with the proviso that if n is 1, then x is 2 and у is 0; and if n>1, then the compounds comprise at least two alkoxy groups and two aryloxy groups. The present invention also relates to a process for preparing carboxylic acid esters, wherein a compound of general formula (I) or (II), wherein q represents an integer of 1 to 4; Y is independently R or R'; or a mixture thereof, with the proviso that the compounds comprise at least two alkoxy groups and two aryloxy groups, is used as a catalyst. The claimed process allows to reduce the amount of a used catalyst and the time of the process duration, while increasing the conversion rate of initial reagents and the yield of a target product.
本发明涉及一种制备羧酸酯的方法,包括在存在选择自通式Tin(OR)x(OR')xOy的化合物的钛催化剂的情况下,将羧酸与醇酯化,其中n为1至4的整数;у为0至6的整数;x可以相同也可以不同,为2至8的整数;R为线性或支链的C1-C18烷基,C3-C18环烷基,R'为芳基,可包含电子给体取代基;或二者的混合物,但若n为1,则x为2且у为0;若n>1,则化合物至少包含两个烷氧基和两个芳氧基。本发明还涉及一种制备羧酸酯的方法,其中通式(I)或(II)的化合物,其中q表示1至4的整数;Y独立地为R或R';或二者的混合物,但化合物至少包含两个烷氧基和两个芳氧基,被用作催化剂。所述方法允许减少使用的催化剂量和过程持续时间,同时提高初始试剂的转化率和目标产品的产率。