公开(公告)号：DE2748905A1

公开(公告)日：1979-05-03

申请号：DE2748905

申请日：1977-11-02

Applicant: BASF AG

Inventor： TOLKSDORF ERICH DIPL CHEM DR ,  GOETZE WALTER DIPL CHEM DR

IPC: C07C255/24 ,  C07C121/43 ,  C07C120/00

Abstract: Prepn. of phenylglycinenitrile-o-carboxylic acid (I) comprises reacting anthranilic acid (II) with HCHO and HCN in an organic solvent at 55-100 degrees (55-70 degrees)C. Pref. the solvent is miscible with water. (I) is an intermediate, by saponification for phenylglycine-o-carboxylic acid which is used in mfr. of indigo. By reacting in a non-aq. solvent the prod. is obtd. free from corrosive by-prods.

公开(公告)号：DE2758883A1

公开(公告)日：1979-07-05

申请号：DE2758883

申请日：1977-12-30

Applicant: BASF AG

Inventor： DISTLER HARRY DR ,  GOETZE WALTER DIPL CHEM DR

IPC: C07D307/32 ,  C07D307/33

公开(公告)号：DE2852343A1

公开(公告)日：1980-06-26

申请号：DE2852343

申请日：1978-12-04

Applicant: BASF AG

Inventor： KROENER MICHAEL DIPL CHEM DR ,  GOETZE WALTER DIPL CHEM DR

IPC: C07C67/22 ,  C07C69/732 ,  C07C69/73

公开(公告)号：DE3000563A1

公开(公告)日：1981-07-16

申请号：DE3000563

申请日：1980-01-09

Applicant: BASF AG

Inventor： RICHTER KONRAD DIPL CHEM DR ,  GOETZE WALTER DIPL CHEM DR ,  MUEHLPFORDT WERNER DIPL CHEM D ,  REICHEL FRITZ DIPL CHEM DR

IPC: B01J27/02 ,  C01C3/14 ,  C02F1/72 ,  A62D3/00

公开(公告)号：DE2445168A1

公开(公告)日：1976-04-01

申请号：DE2445168

申请日：1974-09-21

Applicant: BASF AG

Inventor： SCHWARZ HANS GEORG DIPL CHEM D ,  GOETZE WALTER DIPL CHEM DR ,  HARTERT ERWIN DIPL CHEM DR

IPC: C01C3/10

Abstract: Prodn. of aq. alkali cyanide solns. by reacting alkali hydroxides with HCN, obtained by thermal, catalytically accelerated splitting of formamide under reduced press; is improved in that up to 95% of crude HCN is directly absorbed by an aq. alkali hydroxide soln. without increasing the press. to atmospheric press; whilst the press of the remaining gases is increased to atmospheric press. only subsequently whereby the liquifaction of the residual HCN is effected; the latter is then reacted with the alkali hydroxide soln. The volume of the gases to be compressed to the atmospheric press. is constantly reduced by the absorption of the bulk of HCN when still under reduced press. whereby the size of the compressor can be reduced and the compression cost is dimished.