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1.发明授权Purification of bis-hydroxyalkyl esters of benzene dicarboxylic acids using hypophosphorous or orthophosphorous acid and a group viii catalyst 失效使用高磷酸或正磷酸和第VIII族催化剂对苯甲酸二羧酸的双羟基烷基酯的纯化
公开(公告)号：US3639450A
公开(公告)日：1972-02-01
申请号：US3639450D
申请日：1968-05-29
Applicant: CELANESE CORP
Inventor： KOH LITA L , WITT ENRIQUE R
IPC: C07C69/82
Abstract: A PROCESS FOR TREATING IMPURE BIS-HYDROXYALKYL ESTERS OF BENZENE DICARBOXYLIC ACIDS BY TREATING A HYPOPHOSPHOROUS OR ORTHOPHOSPHOROUS ACID-CONTAINING AQUEOUS SOLUTION OF THE DIESTER WITH A CATALYST OF A GROUP VIII METAL. THIS TREATMENT REDUCES THE AMOUNT OF IMPURITIES COMPRISED OF HYDROXYALKYL ESTERS OF CARBOXYBENZALDEHYDE.
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