公开(公告)号：DE3049541A1

公开(公告)日：1982-07-29

申请号：DE3049541

申请日：1980-12-31

Applicant: BASF AG

Inventor： HUSSLEIN GERD DIPL CHEM DR ,  HAMPRECHT GERHARD DIPL CHEM DR ,  KOENIG KARL-HEINZ DIPL CHEM DR ,  BOEHM WALTER DIPL CHEM DR ,  GAENG MANFRED DIPL CHEM DR

IPC: C07C59/68 ,  C07C51/00 ,  C07C51/363 ,  C07C51/367 ,  C07C59/70 ,  C07C67/00

Abstract: A process for the preparation of 2,4-dichloro- or 2-methyl-4-chlorophenoxyacetic acid or alpha -2,4-dichloro- or alpha -2-methyl-4-chlorophenoxypropionic acid by reacting phenoxyacetic or 2-methylphenoxyacetic acid or alpha -phenoxypropionic or alpha -2-methylphenoxypropionic acid with chlorine in water, wherein phenoxyacetic acid or phenoxypropionic acid is precipitated from an aqueous solution thereof, chlorine gas is passed into the resulting suspension of phenoxyacetic or 2-methylphenoxyacetic acid or alpha -phenoxypropionic or alpha -2-methylphenoxypropionic acid in water at from 30 DEG to 70 DEG C. at a rate not exceeding the rate at which it is consumed in the suspension, until from 100 to 110% of the theoretically required amount of chlorine gas has been taken up by the suspension, and the 2,4-dichloro- or 2-methyl-4-chloro-phenoxyacetic acid or alpha -2,4-dichloro- or alpha -2-methyl-4-chloro-phenoxypropionic acid is isolated from the suspension.

公开(公告)号：DE2424681A1

公开(公告)日：1975-12-11

申请号：DE2424681

申请日：1974-05-21

Applicant: BASF AG

Inventor： BOEHM WALTER DIPL CHEM DR ,  MEIER LUDWIG ING GRAD ,  STUEHLEN FERDINAND

IPC: C08L77/00 ,  C08K3/16 ,  C08K3/30 ,  C08K5/16

公开(公告)号：DE3020526A1

公开(公告)日：1981-12-10

申请号：DE3020526

申请日：1980-05-30

Applicant: BASF AG

Inventor： BRUNNMUELLER FRITZ DIPL CHEM D ,  BOEHM WALTER DIPL CHEM DR ,  WEBERDOERFER VOLKMAR DIPL CHEM

IPC: B04B5/10 ,  C07C67/00 ,  C07C301/00 ,  C07C303/32 ,  C07C303/42 ,  C07C303/44 ,  C07C309/28 ,  C07C309/35 ,  C07C309/40 ,  C07D221/10 ,  C09B69/04 ,  C07C139/14 ,  C07C143/30 ,  C07C143/55

公开(公告)号：DE2724362A1

公开(公告)日：1978-12-07

申请号：DE2724362

申请日：1977-05-28

Applicant: BASF AG

Inventor： ARMBRUST HERBERT ,  BOEHM WALTER DIPL CHEM DR

IPC: C07C205/12 ,  C07C79/12

Abstract: Add to 2657234; 2555736. Prepn. of halonitrobenzenes of formula (I) is effected by (a) reacting an anilide of formula (II) with HNO3; (b) reacting the resulting nitroanilide (III), without isolating it from the reaction mixt., with an acid and H2O at >=25 degrees c; (c) reacting the resulting nitroaniline (IV), without isolating it from the reaction mixt., with a halogenating agent in the presence of H2O and acid; and (d) reacting the resulting halonitroaniline (V), without isolating it from the reaction mixt., with an aliphatic, alicyclic or araliphatic alcohol and nitrosating agent in the presence of acid and H2O at >=35 degrees C. R1 and R2 are halogen, or R2 can be H; R3 is H or an aliphatic gp.