公开(公告)号：DE2209257A1

公开(公告)日：1973-09-06

申请号：DE2209257

申请日：1972-02-26

Applicant: BASF AG

Inventor： LAUTENBACH DIETER DR ,  FUCHS HUGO DR ,  KAHR KURT DR ,  WERNER DIETMAR DR ,  WUNSCH GERD DR

IPC: C07D201/04 ,  C07D201/16 ,  C07D41/06

Abstract: Method for purifying lactams by passing their vapours at temps. higher than their condensation point over or through activated carbon. Residence time is pref. 1-5 (esp. 2-3) sec. For epsilon-caprolactam, temp. used is 180-300 degrees C. Inert gas is opt. present. The carbon can be regenerated by solvent-extraction or superheated steam.

公开(公告)号：CH510666A

公开(公告)日：1971-07-31

申请号：CH486369D

申请日：1969-03-27

Applicant: BASF AG

Inventor： RAPP GUENTHER DR ,  KAHR KURT DR

IPC: C07D201/16 ,  C07D41/06

公开(公告)号：DE2301206A1

公开(公告)日：1974-07-18

申请号：DE2301206

申请日：1973-01-11

Applicant: BASF AG

Inventor： FUCHS HUGO DR ,  KAHR KURT DR

IPC: C07C273/18 ,  C07C127/14

Abstract: The reaction is under acid conditions in inert solvent at (pref. H2O) pref. pH 3-6. 0-120 degrees C. Lactam urea ratio is 1:1-2. The crude reaction prodt. of a Beckmann rearrangement can be used directly. The ureido-acids are inters for textile auxiliaries.

公开(公告)号：DE2246715A1

公开(公告)日：1974-03-28

申请号：DE2246715

申请日：1972-09-22

Applicant: BASF AG

Inventor： FUCHS HUGO DR ,  KAHR KURT DR ,  KLOCKE HANS JOACHIM DR

IPC: B01J2/16 ,  C08G69/20 ,  B01J11/00

Abstract: Flowable catalyst prills for the anionic, polymsn. of lactams are mfd. by introducing a catalyst melt in the form of droplets into a fluidised bed of preformed catalyst prills which are kept in motion with a cold inert gas. Only a small amt. of plant is needed for this process and no dumping of the prills or coating of the reactor walls with catalyst is observed.

公开(公告)号：DE2229396A1

公开(公告)日：1974-01-03

申请号：DE2229396

申请日：1972-06-16

Applicant: BASF AG

Inventor： FUCHS HUGO DR ,  KAHR KURT DR ,  STOCKBURGER DIETER DR ,  FRITSCH RAINER DR

IPC: B01J2/16 ,  C07C101/04

Abstract: Wood and/or plastics is sawn through with a saw having a straight or almost straight sawing edge by moving the saw through the wood and/or plastics in the one direction with a stroke at a positive angle and in the other direction with a stroke at a negative angle to the normal to the wood and/or plastics, and choosing the setting so that a part of the thickness of the wood and/or plastics is sawn through per saw stroke. Sawing is effected without prodn. of splinters esp. when the wood is covered on both sides with plastic material, using relatively low power. Temp. increase is lower.

公开(公告)号：DE2206251A1

公开(公告)日：1973-08-23

申请号：DE2206251

申请日：1972-02-10

Applicant: BASF AG

Inventor： FUCHS HUGO DR ,  KAHR KURT DR ,  MUELLER KARL ROBERT DR

IPC: C07C273/18 ,  C07C127/14

公开(公告)号：DE2164462A1

公开(公告)日：1973-06-28

申请号：DE2164462

申请日：1971-12-24

Applicant: BASF AG

Inventor： FUCHS HUGO DR ,  KAHR KURT DR

IPC: C07D201/12 ,  C07C101/04

Abstract: Cyclic caprolactam dimer (I) and epsilon-aminocaproic acid (II) can be prepd. at the same time from the aq. extracts, contg. oligomers, obtd. in prodn. of polycaprolactam, by treating the oligomers with H2SO4 at >50 degrees C, diluting with water, sepng. the pptd. I, treating the filtrate with a weakly basic ion-exchanger, concentrating and isolating the II which crystallises out. The process is simple and avoids the use of HCl. Aq. extracts contg. higher concns. of oligomers can be treated. The oligomers, at present a waste prod., can be utilised and the problem of disposing of waste water contg. these oligomers can be avoided. I is a heat stabiliser for polyoxymethylene. II can be used to produce synthetic fibres or caprolactam, and is an intermediate for pharmaceuticals and textile auxiliaries.

公开(公告)号：DE2138930A1

公开(公告)日：1973-02-15

申请号：DE2138930

申请日：1971-08-04

Applicant: BASF AG

Inventor： KAHR KURT DR ,  POHL HANNS DR ,  RAPP GUENTHER DR ,  LAUX PETER DIPL ING

IPC: C07C20060101 ,  C07C131/04

Abstract: Water is partially removed from cyclohexanone oxime (I) by treating the impure I at a bove the m.pt in counter current in an extn. column, with a conc. ammonium and/or hydroxylammonium salt soln., sepng. the salt soln from I with reduced water content, concentrating the soln by evapn. and using it again for partial removal of water from I. The I is more suitable for prodn of caprolactam. The process is continuous. Residues of cyclohexanone in I are completely removed, with conversion to I during the removal of water.

公开(公告)号：DE2216068A1

公开(公告)日：1973-10-11

申请号：DE2216068

申请日：1972-04-01

Applicant: BASF AG

Inventor： FUCHS HUGO DR ,  KAHR KURT DR

IPC: C07C275/16 ,  C07C127/16

公开(公告)号：DE2149821A1

公开(公告)日：1973-04-12

申请号：DE2149821

申请日：1971-10-06

Applicant: BASF AG

Inventor： WEITZ HANS MARTIN DR ,  VOGEL HANS-HENNING DR ,  KAHR KURT DR ,  FUCHS HUGO DR

IPC: C07C205/45 ,  C07C20060101 ,  C07C45/00 ,  C07C67/00 ,  C07C201/00 ,  C07C201/08 ,  C07C79/36