公开(公告)号：BR9913889A

公开(公告)日：2001-07-03

申请号：BR9913889

申请日：1999-09-21

Applicant: BASF AG

Inventor： THEIS GERHARD ,  ADRIAN TILL ,  BESSLING BERND ,  HASSE HANS ,  VANSANT FRANS

IPC: C07C29/10 ,  C07C29/80 ,  C07C31/20

Abstract: A process for the distillative recovery of high purity monoethylene glycol from the hydrolysis, product of ethylene oxide by pressure dewatering, preferably in a battery, vacuum dewatering and subsequent purifying distillation, wherein during the vacuum dewatering an aqueous stream is withdrawn which contains-monoethylene glycol in a concentration below 1% by weight, preferably below 0.1% by weight, medium boilers and low boilers. The withdrawn aqueous stream is, optionally after further workup, removed from the system.

公开(公告)号：AT266014T

公开(公告)日：2004-05-15

申请号：AT99969411

申请日：1999-09-20

Applicant: BASF AG

Inventor： THEIS GERHARD ,  VANSANT FRANS

IPC: F01K27/02 ,  C07C29/10 ,  C07C29/80 ,  C07C31/20 ,  C07D301/08 ,  C07D301/10 ,  C07D301/32 ,  C07D303/04 ,  F22B1/18

Abstract: In the preparation of ethylene oxide by direct oxidation of ethylene with air or oxygen using water as heat carrier to dissipate the heat of reaction, with water vapor being formed, a process for optimizing the specific energy consumption is proposed. In this, the water vapor is first expanded in one or more backpressure steam turbine(s) T for operating working machines M, before it is fed to one or more consumers, such as bottoms reboilers or steam injectors, for further utilization.

公开(公告)号：AT255084T

公开(公告)日：2003-12-15

申请号：AT99969405

申请日：1999-09-21

Applicant: BASF AG

Inventor： THEIS GERHARD ,  ADRIAN TILL ,  BESSLING BERND ,  HASSE HANS ,  VANSANT FRANS

IPC: C07C29/10 ,  C07C29/80 ,  C07C31/20

Abstract: A process for the distillative recovery of high purity monoethylene glycol from the hydrolysis, product of ethylene oxide by pressure dewatering, preferably in a battery, vacuum dewatering and subsequent purifying distillation, wherein during the vacuum dewatering an aqueous stream is withdrawn which contains-monoethylene glycol in a concentration below 1% by weight, preferably below 0.1% by weight, medium boilers and low boilers. The withdrawn aqueous stream is, optionally after further workup, removed from the system.

公开(公告)号：DE59904662D1

公开(公告)日：2003-04-24

申请号：DE59904662

申请日：1999-09-21

Applicant: BASF AG

Inventor： ADRIAN TILL ,  BESSLING BERND ,  HASSE HANS ,  VANSANT FRANS ,  THEIS GERHARD

IPC: C07C29/10 ,  C07C29/76 ,  C07C29/80 ,  C07C31/20

Abstract: A process for the distillative recovery of high purity monoethylene glycol from the hydrolysis product of ethylene oxide by pressure dewatering, vacuum dewatering and subsequent purifying distillation, which includes the pressure dewatering columns or at least the first pressure dewatering column of the battery (2, 3, 4) having a stripping section with at least one separating stage, preferably with from 2 to 10 separating stages, particularly preferably with from 3 to 6 stages, and a portion of the overhead stream of the pressure dewatering column(s) (2, 3, 4) having a stripping section being removed from the system.

公开(公告)号：AT234799T

公开(公告)日：2003-04-15

申请号：AT99952457

申请日：1999-09-21

Applicant: BASF AG

Inventor： ADRIAN TILL ,  BESSLING BERND ,  HASSE HANS ,  VANSANT FRANS ,  THEIS GERHARD

IPC: C07C29/10 ,  C07C29/76 ,  C07C29/80 ,  C07C31/20

Abstract: A process for the distillative recovery of high purity monoethylene glycol from the hydrolysis product of ethylene oxide by pressure dewatering, vacuum dewatering and subsequent purifying distillation, which includes the pressure dewatering columns or at least the first pressure dewatering column of the battery (2, 3, 4) having a stripping section with at least one separating stage, preferably with from 2 to 10 separating stages, particularly preferably with from 3 to 6 stages, and a portion of the overhead stream of the pressure dewatering column(s) (2, 3, 4) having a stripping section being removed from the system.

公开(公告)号：BR9913891A

公开(公告)日：2001-07-03

申请号：BR9913891

申请日：1999-09-21

Applicant: BASF AG

Inventor： ADRIAN TILL ,  BESSLING BERND ,  HASSE HANS ,  VANSANT FRANS ,  THEIS GERHARD

IPC: C07C29/10 ,  C07C29/76 ,  C07C29/80 ,  C07C31/20

Abstract: A process for the distillative recovery of high purity monoethylene glycol from the hydrolysis product of ethylene oxide by pressure dewatering, vacuum dewatering and subsequent purifying distillation, which includes the pressure dewatering columns or at least the first pressure dewatering column of the battery (2, 3, 4) having a stripping section with at least one separating stage, preferably with from 2 to 10 separating stages, particularly preferably with from 3 to 6 stages, and a portion of the overhead stream of the pressure dewatering column(s) (2, 3, 4) having a stripping section being removed from the system.

公开(公告)号：DE19855911A1

公开(公告)日：2000-06-08

申请号：DE19855911

申请日：1998-12-03

Applicant: BASF AG

Inventor： VANSANT FRANS ,  DE HERT JOZEF ,  KOEFFER DIETER ,  THEIS GERHARD ,  TERJUNG WINFRIED

IPC: B01D1/22 ,  C07C29/10 ,  C07C29/76 ,  C07C29/80 ,  C07C31/20

Abstract: Separation of glycol from a mixture of glycol, water and salt is carried out using a thin film evaporator. A process for the separation of glycols (I) from a mixture (II) of glycols, water and salt comprises: (A) evaporation of at least a partial amount of water and glycol from the mixture to form a salt free liquid or gaseous medium, (B) dewatering of the medium and (C) isolation of the glycols from the dewatered medium whereby step (A) is carried out in a thin film evaporator (35). Independent claims are included for: (i) a process for the production of glycols by catalytic conversion of ethylene with oxygen to form a reaction mixture containing ethylene oxide, subsequent processing to form a glycol, water and salt containing liquid mixture (II) and separation using the thin film evaporator (35) (ii) a thin film evaporator (35) comprising a delivery tube (20) at the head for the salt free, glycol and water containing liquid or gaseous medium, a sump discharge (21), a supply feed (51), an inlet tube (53) for a rinse medium, two inlet tubes (54,55) for inert gas, a rinse take off (56), a discharge container (57), a collection container (58), discharge valve (60), rinse water valve (61), container discharge valve (62), rinse discharge valve (63) and degassing valve (64).

公开(公告)号：DE19843721A1

公开(公告)日：2000-03-30

申请号：DE19843721

申请日：1998-09-23

Applicant: BASF AG

Inventor： ADRIAN TILL ,  HASSE HANS ,  VANSANT FRANS ,  THEIS GERHARD

IPC: C07C29/10 ,  C07D301/32 ,  C07D301/04

Abstract: The invention relates to a method for the continuous production of an aqueous ethylene oxide solution by absorbing ethylene oxide from a gaseous mixture containing 1.5 to 4 mole percent, preferably 2.5 to 3 mole percent of ethylene oxide in the wash water in an absorber. The mixture drawn directly from the absorber has a water/ethylene oxide weight ratio of 5 to 20, preferably of 10 to 15. The absorbed mixture is especially useful for directly feeding it to a secondary reactor for the production of glycol.

公开(公告)号：DE19843654A1

公开(公告)日：2000-03-30

申请号：DE19843654

申请日：1998-09-23

Applicant: BASF AG

Inventor： THEIS GERHARD ,  VANSANT FRANS

IPC: F01K27/02 ,  C07C29/10 ,  C07C29/80 ,  C07C31/20 ,  C07D301/08 ,  C07D301/10 ,  C07D301/32 ,  C07D303/04 ,  F22B1/18

Abstract: The invention relates to a method for optimizing the specific energy consumption of a method for producing ethylene oxide by direct oxidization of ethylene with air or oxygen, using water as the heat transfer medium for removing the heat of the reaction so that water vapor is formed. According to the invention, the water vapor is first expanded in one or several back pressure steam turbine(s) T for operating machines M before being supplied for use by one or several other consumers, such as bottom evaporators or steam injectors.

公开(公告)号：CA2345140A1

公开(公告)日：2000-03-30

申请号：CA2345140

申请日：1999-09-21

Applicant: BASF AG

Inventor： HASSE HANS ,  THEIS GERHARD ,  VANSANT FRANS ,  ADRIAN TILL ,  BESSLING BERND

IPC: C07C29/10 ,  C07C29/76 ,  C07C29/80 ,  C07C31/20

Abstract: The invention relates to a method for obtaining highly pure monoethylene glycol from the product of hydrolysis of ethylene oxide by distillation, by means of dehydration under pressure, preferably in a cascade, vacuum dehydration and subsequent pure distillation. According to the inventive method, the pressure dehydration column or at least the first pressure dehydration column of the cascade (2, 3, 4) has a stripping section with at least one separation stage, preferably 2-10 separation stages, especially 3- 6 stages, and in that part of the top flow of the dehydration column(s) (2, 3, 4) is sluiced out with the stripping section.