公开(公告)号：DE2201455A1

公开(公告)日：1973-07-19

申请号：DE2201455

申请日：1972-01-13

Applicant: BAYER AG

Inventor： WALDMANN HELMUT DR ,  SCHWERDTEL WULF DR ,  SWODENK WOLFGANG DR

IPC: B01J21/00 ,  B01J23/00 ,  B01J31/00 ,  C07B61/00 ,  C07C45/00 ,  C07C45/58 ,  C07C67/00 ,  C07C47/00

公开(公告)号：DE2135154A1

公开(公告)日：1973-02-22

申请号：DE2135154

申请日：1971-07-14

Applicant: BAYER AG

Inventor： THELEN HERMANN DR ,  SCHWERDTEL WULF DR ,  HALCOUR KURT DR ,  SWODENK WOLFGANG DR

IPC: B01J23/44 ,  C07C85/10

Abstract: Amino cpds. are prepd. by the continuous redn. of nitro cpds. with H2 at high pressure, by trickling the reaction mixt. over a fixed Pd catalyst supported on a spinel. The nitro cpd., opt. mixed with a liquid diluent (pref. the amine reaction prodt.), is pref. trickled over the catalyst at 50-250 degrees C in a tube reactor, the heat of reaction being removed by a coolant surrounding the tube. The nitro cpd. is pref. nitrobenzene, di- or tri-nitrobenzene, nitrotoluene, di- or tri-nitrotoluene, nitrochlorobenzene, nitrophenol, nitrodiphenylamine or nitropropane. The process can also be used for reductive alkylation, by adding an aldehyde or ketone, pref. acetone, during hydrogenation. The prodt. can be used, e.g., for the prodn. of isocyanates and plant-protection agents.

公开(公告)号：DE2038455A1

公开(公告)日：1972-02-10

申请号：DE2038455

申请日：1970-08-01

Applicant: BAYER AG

Inventor： WALDMANN HELMUT DR ,  SCHWERDTEL WULF DR ,  SWODENK WOLFGANG DR

IPC: C07D309/30 ,  C07C51/285 ,  C07D315/00 ,  C07D9/00

Abstract: 1364526 t-Caprolactone BAYER AG 29 July 1971 [1 Aug 1970] 35732/71 Heading C2C t-Caprolactone is obtained by oxidizing cyclohexanol with molecular oxygen in the liquid phase, hydrolysing the initially formed cyclohexanone peroxide to cyclohexanone and H 2 O 2 , extracting the H 2 O 2 with H 2 O, adding to the resulting aqueous H 2 O 2 solution at least one compound of the formula removing substantially all of the H 2 O, reacting the reaction mixture with an aliphatic fatty acid or with a compound which produces an aliphatic fatty acid under the reaction conditions, optionally in the presence of an esterification catalyst, dehydrating once again, and reacting the resulting per-carboxylic acid, either unchanged, after neutralization of the esterification catalyst or after purification of the percarboxylic acid, with the cyclohexanone formed in the first stage to form t-caprolactone, wherein m, n and p are 0 or 1 provided that m, n and p are not simultaneously 0, R 1 , R 2 and R 3 represent optionally substituted straight or branched-chain C 1- C 6 alkyl or optionally substituted C 4- C 6 cycloalkyl radicals up to two of the radicals R 1 , R 2 and R 3 may represent hydrogen, one of the radicals R 1 , R 2 and R 3 may represent an optionally substituted phenyl radical, or R 1 together with R 2 may represent a C 2-7 alkylene radical. The molar ratio of H 2 O 2 to carboxylic acid is preferably in the range from 1 : 1À1 to 1 : 1À5 and a 1À5-3 molar excess of cyclohexanone is preferably used. The dehydration reactions may be effected by distillation under reduced pressure with the aid of an inert diluent. A suitable form of apparatus for continuous operation of the process is described.

公开(公告)号：DE2003933A1

公开(公告)日：1971-08-12

申请号：DE2003933

申请日：1970-01-29

Applicant: BAYER AG

Inventor： SCHARFE GERHARD DR ,  SWODENK WOLFGANG DR ,  MARTIN MANFRED DR

IPC: C07C67/04

Abstract: 2-methylene propane prepn. Title cpd. is prepd. by reacting isobutene, oxygen and acetic acid in the vapour phase at 50-250 degrees C over a Pd-contg. catalyst, partially or completely removing components boiling at >150 degrees C at normal pressure, and returning part or all components boiling at 150 degrees C at normal pressure, to the reaction. The reaction can be conducted in tubular reactors 4-8m long with internal diameters of 20-50mm. The product is useful for the production of 1,3-dihydroxy-2-methylene propane by hydrolysis.

公开(公告)号：DE1668015A1

公开(公告)日：1971-07-15

申请号：DE1668015

申请日：1967-09-05

Applicant: BAYER AG ,  ERDOELCHEMIE GMBH

Inventor： SCHLEPPINGHOFF BERNHARD DR ,  SCHERB HELMUT DR ,  SWODENK WOLFGANG DR ,  BRANDT HANS-WALTHER DR ,  ENGELHARD BRUNO DR ,  STEUDE HEINRICH DIPL-ING

IPC: C07C7/08 ,  C10G21/20 ,  B01D

Abstract: 1,241,584. Isoprene. FARBENFABRIKEN BAYER A.G. 5 Sept., 1968 [5 Sept., 1967], No. 40442/68. Heading C5E. Isoprene is obtained from hydrocarbon mixtures containing other C 5 dienes and possibly also C 5 acetylenes, cyclopentene and cyclopentane by extractive distillation with aniline, optionally containing 1-5% water. The mixture may be obtained from the C 5 -cut from a naphtha cracker by a previous extractive distillation with N-methyl pyrrolidone, acetonitrile or aniline.

公开(公告)号：DE1959776A1

公开(公告)日：1971-06-03

申请号：DE1959776

申请日：1969-11-28

Applicant: BAYER AG

Inventor： SCHARFE GERHARD DR ,  GROLIG JOHANN DR ,  MARTIN MANFRED DR ,  SWODENK WOLFGANG DR ,  DORNFELDT WOLFRAM DR

IPC: C07C47/02

Abstract: Propionaldehyde is prepd. by passing allyl alcohol, in the vapour phase and at high temp. over a catalyst contg. Pd, in the absence of oxygen. The reaction temp. may be 50-250 degrees C pref. 100-200 degrees C and at 0 to 10 atmos. pressure. The catalyst contains Pd as metal or compounds, pref. on a support such as Al2O3 or SiO2, and may contain other metals or their compounds, particularly Au. The gaseous reaction products are cooled to below 50 degrees C and the liquid propionaldehyde phase formed is separated from the gaseous phase which is recycled.