PREPARATION OF MIXTURES OF 1, 4-BUTANEDIOL, TETRAHYDROFURAN AND y-BUTYROLACTONE

摘要

IN A PROCESS FOR PREPARING 1,4-BUTANEDIOL, TETRAHYDROFURAN AND y-BUTYROLACTONE BY OXIDATION OF BUTANE TO GIVE A PRODUCT STREAM COMPRISING MALEIC ANHYDRIDE, ABSORPTION OF MALEIC ANHYDRIDE FROM THE PRODUCT STREAM USING A HIGH-BOILING ALCOHOL TO GIVE A LIQUID ABSORPTION PRODUCT COMPRISING MONOESTERS AND DIESTERS OF MALEIC ACID AND ALSO HIGH-BOILING ALCOHOL, AFTER-ESTERIFICATION OF THE LIQUID ABSORPTION PRODUCT AND SUBSEQUENT HYDROGENATION OF THE AFTER-ESTERIFIED PRODUCT IN THE LIQUID PHASE, THE HIGH-BOILING ALCOHOL IS A POLYHYDRIC ALCOHOL HAVING A BOILING POINT AT ATMOSPHERIC PRESSURE OF ABOVE 233°C AND THE AFTER-ESTERIFIED PRODUCT HAS AN ACID NUMBER OF LESS THAN 30 MG KOH/G AND A WATER CONTENT OF LESS THAN 1BY WEIGHT.