公开(公告)号：DE960988C

公开(公告)日：1957-03-28

申请号：DEB0030824

申请日：1954-04-30

Applicant: BASF AG

Inventor： KROEPER DR HUGO ,  RAU DR WOLFGANG ,  WIRTH DR FRIEDRICH

IPC: C07C5/31

公开(公告)号：DE1112971B

公开(公告)日：1961-08-24

申请号：DEB0057304

申请日：1960-04-01

Applicant: BASF AG

Inventor： KROEPER DR HUGO ,  SINN DR-ING RICHARD ,  WIRTH DR FRIEDRICH

IPC: C07C51/10

公开(公告)号：DE1033654B

公开(公告)日：1958-07-10

申请号：DEB0037556

申请日：1955-10-18

Applicant: BASF AG

Inventor： KROEPER DR HUGO ,  WIRTH DR FRIEDRICH ,  HUCHLER DR OTTO HERMANN

IPC: C07C51/353

公开(公告)号：DE1266748B

公开(公告)日：1968-04-25

申请号：DEB0087234

申请日：1966-05-21

Applicant: BASF AG

Inventor： SCHAEFER DIPL-ING GERHARD ,  SUTER DR HUBERT ,  WIRTH DR FRIEDRICH ,  MANN DIPL-ING WALTER

IPC: C07C51/573

Abstract: 1,180,117. Distillation columns; purification of phthalic anhydride. BADISCHE ANILIN-& SODA-FABRIK A.G. 19 May, 1967 [21 May, 1966; 15 April, 1967], No. 23398/67. Heading BIB. [Also in Division. C2] Phthalic anhydride is purified by distillation in a plant comprising two fractionating columns 1, 5 of the tray-type connected as shown to two evaporators 2, 8 each containing a vertically-disposed bundle of tubes, the arrangement being such that the distilland flows down as a thin film on the inside of the tubes. The material to be purified is introduced about half-way up column 1, which is maintained under reduced pressure. Vapours comprising about 37% of the feed, including all the low-boiling impurities, leave the head of column 1, and are condensed; and part of the condensate is refluxed to the column. Highboiling impurities are withdrawn from the system through line 9. Purified phthalic anhydride is obtained at the head of column 5.

公开(公告)号：DE1259870B

公开(公告)日：1968-02-01

申请号：DEB0087287

申请日：1966-05-25

Applicant: BASF AG

Inventor： SUTER DR HUBERT ,  POEHLER DR GUENTER ,  MUELLER DR KARL-HEINZ ,  WIRTH DR FRIEDRICH

IPC: C07C51/573

公开(公告)号：DE1090647B

公开(公告)日：1960-10-13

申请号：DEB0049029

申请日：1958-05-23

Applicant: BASF AG

Inventor： KROEPER DR HUGO ,  WIRTH DR FRIEDRICH ,  HUCHLER DR OTTO HERMANN

IPC: C07C51/10

公开(公告)号：DE1062691B

公开(公告)日：1959-08-06

申请号：DEB0044863

申请日：1957-06-04

Applicant: BASF AG

Inventor： KROEPER DR HUGO ,  WIRTH DR FRIEDRICH ,  HUCHLER DR OTTO HERMANN

IPC: C07C69/76 ,  C07C69/80 ,  C07C69/82

公开(公告)号：DE1052974B

公开(公告)日：1959-03-19

申请号：DEB0037852

申请日：1955-11-09

Applicant: BASF AG

Inventor： KROEPER DR HUGO ,  WIRTH DR FRIEDRICH ,  HUCHLER DR OTTO HERMANN

IPC: C07C63/00 ,  C07C63/26

公开(公告)号：DE1003190B

公开(公告)日：1957-02-28

申请号：DEB0037894

申请日：1955-09-22

Applicant: BASF AG

Inventor： KROEPER DR HUGO ,  PLATZ DR ROLF ,  WIRTH DR FRIEDRICH ,  FLOERCHINGER HANS

IPC: B01J8/18 ,  C07C5/41 ,  F28C3/16