公开(公告)号：DE2650892A1

公开(公告)日：1978-06-01

申请号：DE2650892

申请日：1976-11-06

Applicant: BASF AG

Inventor： MAGNUSSE PETER DIPL CHEM DR ,  HERRMANN GUENTER DIPL ING DR ,  FROMMER ELMAR DIPL CHEM DR

IPC: C07C27/12 ,  B01J31/00 ,  B01J31/04 ,  C07C20060101 ,  C07C13/18 ,  C07C27/00 ,  C07C27/26 ,  C07C35/08 ,  C07C45/00 ,  C07C49/403 ,  C07C67/00 ,  C07C49/30

Abstract: The treatment of reaction mixts. contg. cyclohexanol and cyclohexanone obtd. by oxidn. of cyclohexane in O2 or gases contg. it, in the liq. phase, at 130-200 degrees C, at 5-25 bars pressure, involves the action in two stages of aq. solns. of alkaline hydroxide and/or carbonate. Fresh aq. alkaline soln. is introduced at the second stage, and the resulting residual alkali is sepd. and added to fresh reaction mixt. at the first stage where the treatment is carried out in presence of inert gases. The inert gases are removed before the second stage. Process purifies the cyclohexanol/cyclohexanone mixt. These cpds. are used to prepare adipic acid or caprolactam. The use of inert gases in the process reduces consumption of alkali and so reduces the amt. of alkaline waste-water which must be treated subsequently.

公开(公告)号：DE3108075A1

公开(公告)日：1982-09-16

申请号：DE3108075

申请日：1981-03-04

Applicant: BASF AG

Inventor： GROSSKINSKY OTTO-ALFRED DIPL C ,  FROMMER ELMAR DIPL CHEM DR ,  RAPP GUENTHER DIPL CHEM DR ,  THOMAS ERWIN ,  SCHMITZ RUEDIGER DIPL ING

IPC: B01D53/56 ,  B01D53/77 ,  C01B21/14 ,  B01D53/36

Abstract: A process for removing nitrous oxide from exit gases which contain this compound and have been obtained in the preparation of hydroxylammonium salts by catalytic reduction of nitric oxide with hydrogen in an aqueous solution of a mineral acid, in the presence of a suspended noble metal catalyst, wherein the exit gases are washed with water.

公开(公告)号：DE3107702A1

公开(公告)日：1982-09-16

申请号：DE3107702

申请日：1981-02-28

Applicant: BASF AG

Inventor： GROSSKINSKY OTTO-ALFRED DIPL C ,  FROMMER ELMAR DIPL CHEM DR ,  RAPP GUENTHER DIPL CHEM DR ,  THOMAS ERWIN

IPC: C01B21/14

Abstract: An improved process for the continuous preparation of hydroxylammonium salts by catalytic reduction of nitric oxide with hydrogen in a dilute aqueous solution of a mineral acid in the presence of a suspended noble metal catalyst at an elevated temperature in several reaction zones connected in series, wherein the improvement comprises maintaining a pH of

公开(公告)号：DE3130305A1

公开(公告)日：1983-02-17

申请号：DE3130305

申请日：1981-07-31

Applicant: BASF AG

Inventor： GROSSKINSKY OTTO-ALFRED DIPL C ,  FROMMER ELMAR DIPL CHEM DR ,  RAPP GUENTHER DIPL CHEM DR ,  THOMAS ERWIN

IPC: C07C239/08 ,  B01J23/42 ,  C01B21/14 ,  C07C67/00 ,  C07C239/00

公开(公告)号：DE2745448A1

公开(公告)日：1979-04-12

申请号：DE2745448

申请日：1977-10-08

Applicant: BASF AG

Inventor： MAGNUSSEN PETER DIPL CHEM DR ,  HERRMANN GUENTER DIPL ING DR ,  FROMMER ELMAR DIPL CHEM DR

IPC: C07C27/12 ,  C07C27/26 ,  C07C35/08 ,  C07C49/30

Abstract: A reaction mixt. contg. cyclohexanol (I) and cyclohexanone (II), obtd. by oxidn. of cyclohexane with O2 (O2-contg. gas) in the liq. phase at 130-200 degrees C and 5-25 bars, is processed in 2 stages with an aq. soln. of an alkali metal hydroxide and/or carbonate. The fresh aq. soln. is added in the second stage. The alkaline effluent sepd. from the second stage is contacted with fresh reaction mixt. in presence of an inert gas; the inert gas is sepd. before the second stage. The treatment is pref. with NaOH or Na2CO3; the inert gas is the waste gas obtd. in the oxidn. of cyclohexane; treatment in both stages is at 100-150 degrees C; and alkali consumption can still be further reduced by addn. of a heavy metal cpd., pref. a Co cpd. The consumption of alkali is considerably reduced and there is a smaller amt. of waste water to be purified.

公开(公告)号：DE3108257A1

公开(公告)日：1982-09-16

申请号：DE3108257

申请日：1981-03-05

Applicant: BASF AG

Inventor： GROSSKINSKY OTTO-ALFRED DIPL C ,  FROMMER ELMAR DIPL CHEM DR ,  RAPP GUENTHER DIPL CHEM DR ,  THOMAS ERWIN

IPC: C01B21/14 ,  C01B21/087

公开(公告)号：DE3030735A1

公开(公告)日：1982-03-25

申请号：DE3030735

申请日：1980-08-14

Applicant: BASF AG

Inventor： FUCHS HUGO DIPL CHEM DR ,  FROMMER ELMAR DIPL CHEM DR ,  GROSSKINSKY OTTO-ALFRED DIPL C

IPC: C07D201/12 ,  C08J11/02

公开(公告)号：DE3026538A1

公开(公告)日：1982-02-11

申请号：DE3026538

申请日：1980-07-12

Applicant: BASF AG

Inventor： FUCHS HUGO DIPL CHEM DR ,  BRAND UWE ING GRAD ,  ELIASCH ERNST DIPL CHEM DR ,  FROMMER ELMAR DIPL CHEM DR

IPC: C07D201/16

Abstract: In a process for continuously extracting caprolactam from an aqueous solution, containing caprolactam and its oligomers, with organic solvents, by introducing the aqueous solution into the upper part of an extraction zone and organic solvents into the lower part, and taking off a solution of caprolactam in organic solvents at the upper end and an aqueous phase containing caprolactam oligomers at the lower end, the improvement that liquid aromatic hydrocarbons are used and the extraction is carried out at a pH of from 2.0 to 6.0.

公开(公告)号：DE2926279A1

公开(公告)日：1981-01-08

申请号：DE2926279

申请日：1979-06-29

Applicant: BASF AG

Inventor： FUCHS HUGO DIPL CHEM DR ,  GROSSKINSKY OTTO-ALFRED DIPL C ,  FROMMER ELMAR DIPL CHEM DR ,  KARTTE KLAUS DIPL CHEM DR

IPC: C07D201/02 ,  C07D201/16 ,  C07D223/10

Abstract: A process for purifying caprolactam, which has been obtained by a Beckmann rearrangement, by extracting crude caprolactam with solvents, distilling the extract in the presence of alkali, and isolating pure caprolactam, wherein, in a first stage, caprolactam is distilled from the alkaline distillation residue at a bottom temperature of 130 DEG -160 DEG C., and is recycled to the distillation stage, the residue thus obtained is distilled, in a second stage, at a bottom temperature of 140 DEG -180 DEG C., and the distillate is treated with strongly acidic agents in a third stage and is then recycled to the extraction stage.

公开(公告)号：DE2819593A1

公开(公告)日：1979-11-08

申请号：DE2819593

申请日：1978-05-05

Applicant: BASF AG

Inventor： HERRMANN GUENTER DIPL ING DR ,  FROMMER ELMAR DIPL CHEM DR ,  PAETSCH JUERGEN DIPL CHEM DR ,  REISS WOLFGANG DIPL CHEM DR ,  WINDERL SIEGFRIED DIPL CHEM DR

IPC: C07C29/149 ,  C07C31/20 ,  C07C29/00

Abstract: H3PO4 or a phosphate ester is added to 6 C mono- and/or dicarboxylic acids, esp. the acid mixts. obtd. as by-prods. in cyclohexane oxidn. to cyclohexanone, before their hydrogenation to 6 C alpha, omega-diols. Phosphoric acid or phosphate quantity added may be 10-100 ppm. w.r.t. aq. solns. The phosphates may be derived from 1-20 C alcohols. The formation of residues, i.e. 'cork' formation, causing clogging of plant, is prevented.