公开(公告)号：US3886199A

公开(公告)日：1975-05-27

申请号：US37113973

申请日：1973-06-18

Applicant: BASF AG

Inventor： SUTER HUBERT ,  BERGER ROSEMARIE ,  BIPP HANSJOERG ,  BUERGER GERT ,  HAUPTMANN KURT ,  KRATZER OTTO ,  REIMER WILLI

IPC: C07C69/003 ,  C02F1/26 ,  C02F9/00 ,  C07C69/34 ,  C07C69/80

CPC classification number: C02F1/26 ,  C02F2101/34 ,  C02F2101/345 ,  Y02P20/582

Abstract: Manufacture of diesters of dicarboxylic acids from aliphatic or aromatic dicarboxylic acids or their anhydrides and alcohols of from three to 15 carbon atoms, in which substantial purification of the waste water is achieved by treating the waste water with the same alcohol as used in the ester synthesis.

Abstract translation: 从脂肪族或芳族二羧酸或其酸酐和3至15个碳原子的醇制造二羧酸的二酯，其中通过用与酯合成中所用相同的醇处理废水来实现废水的实质性纯化 。

公开(公告)号：US3896159A

公开(公告)日：1975-07-22

申请号：US46874374

申请日：1974-05-10

Applicant: BASF AG

Inventor： KRATZER OTTO ,  BIPP HANSJOERG

IPC: C02F1/26 ,  C07C67/08 ,  C07C69/34 ,  C07C69/52 ,  C07C69/60 ,  C07C69/80 ,  C07C67/06

CPC classification number: C07C67/08 ,  C02F1/26 ,  C07C67/60 ,  C07C69/80 ,  C07C69/44

Abstract: A process for the production of diesters of aliphatic and aromatic dicarboxylic acids or their anhydrides and alcohols of three to fifteen carbon atoms while recycling the alcohol used in excess and in the absence of an esterification catalyst at a temperature of from 150* to 250*C in which the reaction mixture, after water of esterification has been removed, has aqueous alkali added to the point of neutralization to separate the monoester from the diester, the aqueous solution of the monoester salt thus separated is acidified with sulfuric acid to recover the monoester, the diester is washed with water to remove residues of alkali and the diester which has been washed until neutral is treated with steam, wherein there is added to the aqueous solution of the monoester salt prior to, during or after acidification a weight of the alcohol serving for the production of the ester which is from one-half to once the weight of the monoester salt, washing of the diester is carried out in two stages, the water of esterification and the aqueous condensate obtained in the final steam treatment are used together or separately for washing the diester and the waste water obtained in the diester washing is used completely for the production of the aqueous alkali.