公开(公告)号：US3844903A

公开(公告)日：1974-10-29

申请号：US24816972

申请日：1972-04-27

Applicant: BASF AG

Inventor： WILLERSINN C ,  REICHENEDER F

IPC: C07C51/25 ,  C07C51/46 ,  C07C57/07 ,  B01D3/36 ,  C07C57/04

CPC classification number: C07C51/252 ,  C07C51/46 ,  Y10S203/22 ,  C07C57/04 ,  C07C53/08

Abstract: Alpha , Beta -Unsaturated carboxylic acids which have been prepared by catalytic oxidation of the corresponding olefins bearing terminal double bonds or the corresponding Alpha , Beta -unsaturated aldehydes with oxygen or oxygen-containing gases, and by-products formed in this reaction may be removed from their aqueous solutions by azeotropic distillation using hydrophobic solvents which boil at higher temperatures than the carboxylic acids and which do not form azeotropes with the substances to be separated, provided that an organic solvent boiling at a higher temperature than all of the products to be removed by distillation is added in a quantity which is in excess of that required for the azeotropic removal of the water.

Abstract translation: 已经通过催化氧化相应的带有末端双键的烯烃或相应的α，β-不饱和醛与氧或含氧气体以及在该反应中形成的副产物制备的α，β-不饱和羧酸可被除去 通过使用在比羧酸更高的温度下沸腾并且不与待分离的物质形成共沸物的疏水性溶剂通过共沸蒸馏从它们的水溶液中提供，条件是在比待除去的所有产物更高的温度下沸腾的有机溶剂 通过蒸馏加入的量超过共沸除去水所需的量。

公开(公告)号：US3801634A

公开(公告)日：1974-04-02

申请号：US3801634D

申请日：1971-11-18

Applicant: BASF AG

Inventor： KRABETZ R ,  WILLERSINN C ,  LEBERT U ,  FREY W ,  ENGELBACH H ,  WISTUBA H

IPC: B01J8/06 ,  C07C45/35 ,  C07C51/25 ,  C07C57/04 ,  C07C51/32

CPC classification number: C07C45/35 ,  B01J8/06 ,  B01J2208/025 ,  C07C51/252 ,  C07C47/22 ,  C07C57/04

Abstract: THE OXIDATION OF PROPYLENE TO ACRYLIC IN TWO STAGES VIA ACROLEIN USING CONVENTIONAL OXIDATION CATALYSTS PROCEEDS PARTICULARLY WELL WHEN THE ACTIVITY OF THE CATALYSTS IN THE TWO STAGES INCREASES IN THE DIRECTION OF FLOW OF THE REACTION GASES AND THE OFF-GASES FROM THE SECOND STAGE ARE RECYCLED TO THE FIRST STAGE AS DILUTING GASES.