公开(公告)号：US3799976A

公开(公告)日：1974-03-26

申请号：US17877371

申请日：1971-09-08

Applicant: BASF AG

Inventor： NIENBURG H ,  EISFELD W ,  WACHE H

IPC: C07C51/487 ,  C07C51/42 ,  C07C63/26

CPC classification number: C07C51/487 ,  C07C63/26

Abstract: A PROCESS FOR PURIFYING TEREPHTHALIC ACID (OBTAINED FROM CRUDE TEREPHTHALIC ACID AND CONTAINING SMALL AMOUNTS OF 4-CARBOXYBENZALDEHYDE AND OTHER IMPURITIES BY A REDUCTIVE TREATMENY OF AN AQUEOUS SOLUTION WHICH CONTAINS FROM 5 TO 45% BY WEIGHT KOF FROMIC ACID AT ACID AND FROM 0.0003 TO 3% BY WEIGHT OF FORMIC ACID AT ELEVAED TEMPERATURE AND IN THE PRESENCE OF A NOBLE METAL CATALYST OF THE EIGHT GROUP OF THE PERIODIC TABLE. THE AQUEOUS MIXTURE IS HEATED TO A TEMPERATURE OF AT LEAST 230*C.

公开(公告)号：US3817927A

公开(公告)日：1974-06-18

申请号：US31139472

申请日：1972-12-01

Applicant: BASF AG

Inventor： KOVACS J ,  EISFELD W

IPC: C08G73/00 ,  C08G73/10 ,  C08J5/24 ,  C08G20/32

CPC classification number: C08G73/1064

Abstract: A PROCESS FOR THE PRODUCTION OF THERMOPLASTIC POLYIMIDES. 3,3'',4,4''-DIPHENYLSULFONE TETRACHARBOXYLIC ACID OR A DERIVATIVE OF THE SAME WHICH FORMS AMIDE GROUPS IS POLYCONDENSED WITH 4,4''-DIAMINOBENZOPHENONE IN A POLAR ORGANIC SOLVENT AT A TEMPERATURE OF MORE THAN 160* C. TO FORM A POLYIMIDE. THE POLYIMIDES PREPARED ACCORDING TO THE INVENTION ARE PARTICULARLY SUITABLE FOR THE PRODUCTION OF MOLDINGS RESISTANT TO HIGH TEMPERATURES.

公开(公告)号：SE371187B

公开(公告)日：1974-11-11

申请号：SE930170

申请日：1970-07-03

Applicant: BASF AG

Inventor： STURM H ,  ARMBRUST H ,  NIENBURG H ,  EISFELD W

IPC: C07C51/31 ,  C07C65/20

Abstract: 1305599 Ortho-benzoyl benzoic acid and anthraquinone BADISCHE ANILIN- & SODAFABRIK AG 3 July 1970 [4 July 1969] 32347/70 Heading C2C Ortho-benzoylbenzoic acid is obtained by oxidizing an indem of the formula where R1 and R 3 each represent a hydrogen atom or an alkyl radical and R 2 represents an alkyl radical, with oxygen in the liquid phase in the presence of a heavy metal salt, e.g. cobalt or manganese salts, and a compound yielding bromide ions. The ratio of bromide to each mole of heavy metal salt is preferably 0À2-2 grams. The ortho-benzoyl benzoic acid may be converted, without isolation, to anthraquinone by means of a dehydrating agent such as sulphuric acid or phosphoric acid.

公开(公告)号：ZA7004592B

公开(公告)日：1971-04-28

申请号：ZA7004592

申请日：1970-07-03

Applicant: BASF AG

Inventor： STURM H ,  ARMBRUST H ,  NIENBURG H ,  EISFELD W

IPC: C07C51/31 ,  C07C

CPC classification number: C07C51/313 ,  C07C65/34

公开(公告)号：ZA704592B

公开(公告)日：1971-04-28

申请号：ZA704592

申请日：1970-07-03

Applicant: BASF AG

Inventor： STURM H ,  ARMBRUST H ,  NIENBURG H ,  EISFELD W

IPC: C07C51/31 ,  C07C

Abstract: 1305599 Ortho-benzoyl benzoic acid and anthraquinone BADISCHE ANILIN- & SODAFABRIK AG 3 July 1970 [4 July 1969] 32347/70 Heading C2C Ortho-benzoylbenzoic acid is obtained by oxidizing an indem of the formula where R1 and R 3 each represent a hydrogen atom or an alkyl radical and R 2 represents an alkyl radical, with oxygen in the liquid phase in the presence of a heavy metal salt, e.g. cobalt or manganese salts, and a compound yielding bromide ions. The ratio of bromide to each mole of heavy metal salt is preferably 0À2-2 grams. The ortho-benzoyl benzoic acid may be converted, without isolation, to anthraquinone by means of a dehydrating agent such as sulphuric acid or phosphoric acid.