公开(公告)号：JPS63104956A

公开(公告)日：1988-05-10

申请号：JP23759887

申请日：1987-09-24

Applicant: BASF AG

Inventor： BRAND UWE ,  SCHMITZ RUEDIGER ,  DEUKER ERNST ,  FUCHS HUGO

IPC: C07D201/04 ,  C07D201/16

公开(公告)号：JPS63175621A

公开(公告)日：1988-07-20

申请号：JP32164887

申请日：1987-12-21

Applicant: BASF AG

Inventor： BRAND UWE ,  DEDECKER EMILE ,  DEUKER ERNST ,  FUCHS HUGO ,  KARTTE KLAUS ,  NEUBAUER GERALD ,  OOSTVOGELS JOZEF

IPC: B01D53/44 ,  B01D53/14 ,  B01D53/34 ,  B01D53/72 ,  B01D53/77 ,  C07D201/16

公开(公告)号：IN170518B

公开(公告)日：1992-04-04

申请号：IN935MA1987

申请日：1987-12-28

Applicant: BASF AG

Inventor： BRAND UWE ,  DEDECKER EMILE ,  DEUKER ERNST ,  FUCHS HUGO ,  KARTTE KLAUS ,  NEUBAUER GERALD ,  OOSTVOGELS JOZEF

IPC: B01D53/44 ,  B01D53/14 ,  B01D53/34 ,  B01D53/72 ,  B01D53/77 ,  C07D201/16 ,  C07D223/10

公开(公告)号：ES2019612B3

公开(公告)日：1991-07-01

申请号：ES87115062

申请日：1987-10-15

Applicant: BASF AG

Inventor： BRAND UWE ,  SCHMITZ RUEDIGER ,  DEUKER ERNST ,  FUCHS HUGO

IPC: C07D201/04 ,  C07D201/16

公开(公告)号：DE3767824D1

公开(公告)日：1991-03-07

申请号：DE3767824

申请日：1987-10-15

Applicant: BASF AG

Inventor： BRAND UWE ,  SCHMITZ RUEDIGER ,  DEUKER ERNST ,  FUCHS HUGO

IPC: C07D201/04 ,  C07D201/16

Abstract: Reaction mixtures obtained by Beckmann rearrangement of cyclohexanone oxime with sulfuric acid or oleum are neutralized by a process which comprises the following steps: (a) mixing the reaction mixture with recycled ammonium sulfate mother liquor whose concentration is chosen so that no solid ammonium sulfate is precipitated during the neutralization, (b) neutralization by feeding gaseous ammonia which contains water or an aqueous ammonium sulfate solution in finely divided liquid form through a plurality of nozzle orifices into the solution of the reaction mixture in the ammonium sulfate mother liquor at elevated temperatures, (c) separation of crude lactam from the aqueous ammonium sulfate solution, (d) evaporation of the ammonium sulfate solution under reduced pressure and with separation of the crystalline ammonium sulfate from the ammonium sulfate mother liquor and (e) recycling of the ammonium sulfate mother liquor to stage a).

公开(公告)号：DE3774259D1

公开(公告)日：1991-12-05

申请号：DE3774259

申请日：1987-12-22

Applicant: BASF AG

Inventor： BRAND UWE ,  DEDECKER EMILE ,  DEUKER ERNST ,  FUCHS HUGO ,  KARTTE KLAUS ,  NEUBAUER GERALD ,  OOSTVOGELS JOZEF

IPC: B01D53/44 ,  B01D53/14 ,  B01D53/34 ,  B01D53/72 ,  B01D53/77 ,  C07D201/16

Abstract: Water-immiscible solvents are removed from waste gases by washing with caprolactam (I) contg. water. The wash soln. contains 5-40 wt.% water and is used at 50-5000 kg per cu.m. gas. The wash temp. is 10-80 deg.C.

公开(公告)号：DE3700247A1

公开(公告)日：1988-07-21

申请号：DE3700247

申请日：1987-01-07

Applicant: BASF AG

Inventor： BRAND UWE ,  DEDECKER EMILE ,  DEUKER ERNST ,  FUCHS HUGO ,  KARTTE KLAUS ,  NEUBAUER GERALD ,  OOSTVOGELS JOZEF

IPC: B01D53/44 ,  B01D53/14 ,  B01D53/34 ,  B01D53/72 ,  B01D53/77 ,  C07D201/16 ,  B01D11/00

公开(公告)号：DE3635363A1

公开(公告)日：1988-04-21

申请号：DE3635363

申请日：1986-10-17

Applicant: BASF AG

Inventor： BRAND UWE ,  SCHMITZ RUEDIGER ,  DEUKER ERNST ,  FUCHS HUGO

IPC: C07D201/04 ,  C07D201/16

Abstract: Reaction mixtures obtained by Beckmann rearrangement of cyclohexanone oxime with sulfuric acid or oleum are neutralized by a process which comprises the following steps: (a) mixing the reaction mixture with recycled ammonium sulfate mother liquor whose concentration is chosen so that no solid ammonium sulfate is precipitated during the neutralization, (b) neutralization by feeding gaseous ammonia which contains water or an aqueous ammonium sulfate solution in finely divided liquid form through a plurality of nozzle orifices into the solution of the reaction mixture in the ammonium sulfate mother liquor at elevated temperatures, (c) separation of crude lactam from the aqueous ammonium sulfate solution, (d) evaporation of the ammonium sulfate solution under reduced pressure and with separation of the crystalline ammonium sulfate from the ammonium sulfate mother liquor and (e) recycling of the ammonium sulfate mother liquor to stage a).