公开(公告)号：DE602004026866D1

公开(公告)日：2010-06-10

申请号：DE602004026866

申请日：2004-05-17

Applicant: DSM IP ASSETS BV

Inventor： SMEETS THEODORUS MARIA ,  LEMMENS JOANNES ALBERTUS ,  THOMISSEN PETRUS JOZEF

IPC: C07D201/04 ,  B01F5/04 ,  B01J19/26 ,  C07D223/10

Abstract: The invention relates to a process for preparing caprolactam by admixture of cyclohexanone oxime to a reaction mixture comprising caprolactam and sulfuric acid using a mixing device, said mixing device comprising (i) a tube through which the reaction mixture can flow, and (ii) channels disposed around the tube, said channels opening into the tube, said process comprising: passing the reaction mixture through the tube, and feeding the cyclohexanone oxime into the reaction mixture through one or more of said channels, wherein Re>5000, Re being the Reynolds number as defined by rho.V.D/eta, wherein rho=density (in kg/m 3 ) of the reaction mixture that is fed to the tube V=velocity of the reaction mixture, V being defined as W/A, wherein W is the flow rate (in m 3 /s) of the reaction mixture that is fed into the tube and A is the cross section area of the tube (in m 2 ) at the level where said channels open into the tube D=diameter of the tube at the level where said channels open into the tube (in m) eta=viscosity of the reaction mixture that is fed into the tube (in Pa.s).

公开(公告)号：DE602004032128D1

公开(公告)日：2011-05-19

申请号：DE602004032128

申请日：2004-05-17

Applicant: DSM IP ASSETS BV

Inventor： SMEETS THEODORUS MARIA ,  LEMMENS JOANNES ALBERTUS ,  MOSTERT FRANK

IPC: C07D201/04 ,  B01F5/04 ,  B01J19/26 ,  C07D223/10

公开(公告)号：DE602004026730D1

公开(公告)日：2010-06-02

申请号：DE602004026730

申请日：2004-07-16

Applicant: DSM IP ASSETS BV

Inventor： LEMMENS JOANNES ALBERTUS ,  SMEETS THEODORUS MARIA ,  BRANDTS PAUL MARIA ,  CEYSSENS KOEN HARRY

IPC: C07D201/16

Abstract: The invention relates to a process for purifying caprolactam, said process comprising (a) subjecting the caprolactam to a hydrogenation by treating the caprolactam with hydrogen in the presence of a heterogeneous nickel containing hydrogenation catalyst, (b) distilling at least a portion of the hydrogenated caprolactam in a distillation column containing nickel in an amount sufficiently low such that DeltaPAN Ni Ni =DeltaPAN-DeltaPAN Ni=0 , DeltaPAN=increase of the PAN number of caprolactam during distilling, DeltaPAN Ni=0 increase of the PAN number of caprolactam during distilling under the same conditions in a distillation column free of nickel. Nickel is removed from the caprolactam solution prior to the distillation step.

公开(公告)号：DE60239191D1

公开(公告)日：2011-03-31

申请号：DE60239191

申请日：2002-02-27

Applicant: DSM IP ASSETS BV

Inventor： DSINTER-DE HONDT MARIA LOUISA ,  GROOT ZEVERT LOUISE ANNEMARIE ,  LEMMENS JOANNES ALBERTUS

IPC: C07D201/16

公开(公告)号：DE602004009173T2

公开(公告)日：2008-06-26

申请号：DE602004009173

申请日：2004-05-17

Applicant: DSM IP ASSETS BV

Inventor： SMEETS THEODORUS MARIA ,  LEMMENS JOANNES ALBERTUS ,  MOSTERT FRANK ,  CHENG PETER WEI-HAE

IPC: C07D201/04 ,  B01F5/04 ,  B01J19/26

Abstract: The invention relates to a process for preparing caprolactam by admixture of cyclohexanone oxime to a reaction mixture comprising caprolactam and sulfuric acid using a mixing device, said mixing device comprising (i) a tube through which the reaction mixture can flow, and (ii) channels disposed around the tube, said channels opening into the tube, said process comprising: passing the reaction mixture through the tube, and feeding the cyclohexanone oxime into the reaction mixture through one or more of said channels, wherein Re>5000, Re being the Reynolds number as defined by rho.V.D/eta, wherein rho=density (in kg/m 3 ) of the reaction mixture that is fed to the tube V=velocity of the reaction mixture, V being defined as W/A, wherein W is the flow rate (in m 3 /s) of the reaction mixture that is fed into the tube and A is the cross section area of the tube (in m 2 ) at the level where said channels open into the tube D=diameter of the tube at the level where said channels open into the tube (in m) eta=viscosity of the reaction mixture that is fed into the tube (in Pa.s).

公开(公告)号：DE602004009173D1

公开(公告)日：2007-11-08

申请号：DE602004009173

申请日：2004-05-17

Applicant: DSM IP ASSETS BV

Inventor： SMEETS THEODORUS MARIA ,  LEMMENS JOANNES ALBERTUS ,  MOSTERT FRANK ,  CHENG PETER WEI-HAE

IPC: C07D201/04 ,  B01F5/04 ,  B01J19/26

Abstract: The invention relates to a process for preparing caprolactam by admixture of cyclohexanone oxime to a reaction mixture comprising caprolactam and sulfuric acid using a mixing device, said mixing device comprising (i) a tube through which the reaction mixture can flow, and (ii) channels disposed around the tube, said channels opening into the tube, said process comprising: passing the reaction mixture through the tube, and feeding the cyclohexanone oxime into the reaction mixture through one or more of said channels, wherein Re>5000, Re being the Reynolds number as defined by rho.V.D/eta, wherein rho=density (in kg/m 3 ) of the reaction mixture that is fed to the tube V=velocity of the reaction mixture, V being defined as W/A, wherein W is the flow rate (in m 3 /s) of the reaction mixture that is fed into the tube and A is the cross section area of the tube (in m 2 ) at the level where said channels open into the tube D=diameter of the tube at the level where said channels open into the tube (in m) eta=viscosity of the reaction mixture that is fed into the tube (in Pa.s).