Provided is a method for producing di-TMP by reacting n-butyl aldehyde (NBD), formaldehyde and a base, said method including a first step of reacting the NBD, formaldehyde (1) and a base (I) to obtain a reaction mixture solution containing trimethylolpropane (TMP), di-TMP and 2-ethyl-2-propenal (ECR); a second step of distilling the reaction mixture solution to recover the ECR therefrom; and a third step of sequentially adding the ECR recovered by distillation, and adding at least one of a base (II) and formaldehyde (2), to the reaction mixture solution from which the ECR has been recovered by distillation, and thereby allowing a reaction for production of the di-TMP to proceed gradually, in which TMP is added in any one of the first to third steps or in plural steps of the first to third steps.
提供了一种通过正丁基醛(NBD)、
甲醛和碱反应生产二-
三羟甲基丙烷的方法,所述方法包括:第一步,使 NBD、
甲醛(1)和碱(I)反应,得到含有
三羟甲基丙烷(
TMP)、二-
三羟甲基丙烷和 2-乙基-2-
丙烯醛(
ECR)的反应混合物溶液;第二步,蒸馏反应混合物溶液,从中回收
ECR;第三步:将蒸馏回收的
ECR 依次加入到通过蒸馏回收
ECR 的反应混合物溶液中,并加入碱(II)和
甲醛(2)中的至少一种,从而使生产二-
TMP 的反应逐步进行,其中
TMP 在第一至第三步中的任意一步或第一至第三步中的多个步骤中加入。