公开(公告)号：US3455091A

公开(公告)日：1969-07-15

申请号：US3455091D

申请日：1967-11-21

Applicant: BASF AG

Inventor： HERBER HORST ,  HAGEN WERNER ,  SCHROEDER WOLFGANG

IPC: C07C27/22 ,  C07C29/16 ,  C07C45/50 ,  C07C45/78 ,  B01D53/14 ,  B01D47/00

CPC classification number: C07C45/783 ,  C07C27/22 ,  C07C29/16 ,  C07C45/50 ,  C07C31/10 ,  C07C31/125 ,  C07C47/02

Abstract: 1,195,877. Separation of vaporous aldehydes obtained in the oxo process. BADISCHE ANILIN- & SODA FABRIK A.G. 29 Nov., 1967 [30 Nov., 1966], No. 54282/67. Heading C2C. Vaporous aldehydes are separated from offgas formed in the oxo process, by scrubbing the offgas with an oxonation product boiling above 95‹ C. and/or a hydrogenated oxonation product boiling above 95‹ C. Preferably 0À1-2 kg. of the scrubbing material is used per cubic metre of offgas to be scrubbed. Examples recover (a) propionaldehyde by scrubbing the oxo product obtained from ethylene, carbon monoxide and water with a mixture comprising npropanol, para-propionaldehyde and higher boiling condensation products of propionaldehyde, (b) n - butyraldehyde and isobutyraldehyde. Valeraldehyde is also particularly suitable for separation by the method of the invention.

公开(公告)号：FR1286936A

公开(公告)日：1962-03-09

申请号：FR853045

申请日：1961-02-17

Applicant: BASF AG

Inventor： HAGEN WERNER

IPC: C07C45/50

公开(公告)号：CA1029398A

公开(公告)日：1978-04-11

申请号：CA210074

申请日：1974-09-25

Applicant: BASF AG

Inventor： STROHMEYER MAX ,  HAGEN WERNER ,  HOHENSCHUTZ HEINZ

IPC: C07C53/122 ,  C07C27/00 ,  C07C27/20 ,  C07C45/00 ,  C07C45/50 ,  C07C51/00 ,  C07C51/02 ,  C07C51/487 ,  C07C53/124 ,  C07C67/00

Abstract: A process for isolating carboxylic acids from residues of the oxo reaction which are obtained as residues, on hydroformylation of ethylene or propylene, optionally after removing a part of the aldehydes produced, subsequent hydrogenation, treatment with aqueous alkali metal hydroxide solutions and subsequent distillation, wherein the residues are acidified with strong mineral acids to a pH of from 2-4, the acidified mixture not containing more than 5 parts by weight of water per part by weight of the carboxylic acids contained in the mixture, the organic phase is then separated off and the carboxylic acids are isolated therefrom by distillation at pressures below 150 mbar. The carboxylic acids obtained can be used as solvents or for the manufacture of esters.