公开(公告)号：DE3018458A1

公开(公告)日：1982-01-21

申请号：DE3018458

申请日：1980-05-14

Applicant: BASF AG

Inventor： GRAF FRITZ DIPL CHEM DR

IPC: C07D233/58 ,  C07D233/54 ,  C07D233/56

公开(公告)号：DE2940709A1

公开(公告)日：1981-04-16

申请号：DE2940709

申请日：1979-10-08

Applicant: BASF AG

Inventor： GRAF FRITZ DIPL CHEM DR ,  HUPFER LEOPOLD DIPL CHEM DR

IPC: C07D233/54 ,  C07D233/58 ,  C07D233/60 ,  C07D233/61 ,  C07D233/64 ,  C07D521/00

Abstract: A process for the preparation of 1-substituted imidazoles by reacting an alpha -dicarbonyl compound with ammonia, an aldehyde and a primary amine in an aqueous medium, in a single stage, at 20 DEG -150 DEG C.

公开(公告)号：DE2932712A1

公开(公告)日：1981-03-26

申请号：DE2932712

申请日：1979-08-13

Applicant: BASF AG

Inventor： HUPFER LEOPOLD DIPL CHEM DR ,  GRAF FRITZ DIPL CHEM DR ,  EBERHARD PETER DIPL CHEM DR ,  WICKENHAEUSER GERHARD DIPL ING ,  SCHLUETER LOTHAR DIPL ING DR

IPC: C07D233/58 ,  C07D233/54

公开(公告)号：DE2917381A1

公开(公告)日：1980-11-13

申请号：DE2917381

申请日：1979-04-28

Applicant: BASF AG

Inventor： EBERHARD PETER DIPL CHEM DR ,  HUPFER LEOPOLD DIPL CHEM DR ,  GRAF FRITZ DIPL CHEM DR ,  SCHULTE WOLFGANG DIPL CHEM DR

IPC: C07D233/54 ,  C07D233/58

公开(公告)号：DE2435792A1

公开(公告)日：1976-02-05

申请号：DE2435792

申请日：1974-07-25

Applicant: BASF AG

Inventor： GRAF FRITZ DIPL CHEM DR

IPC: C07C27/00 ,  C07C29/149 ,  C07C29/94 ,  C07C31/20 ,  C07C67/00 ,  C07C29/26

Abstract: Polymethylene glycols obtd. by hydrogenating carboxylic acids prepd. by air-oxidn. of cyclohexane are stabilised, esp. during purificn. by distn., by adding catalytic quantities (0.01-2 wt %, based on glycol wt) of H3PO3 or H3PO2, or their salts. Method is useful in prepn. of alpha, omega-tetrapenta- and esp. -hexamethylene glycol, which is a useful raw matl. in fibre mfr. Discolouration on distn. and storage is prevented.