公开(公告)号：AT243231T

公开(公告)日：2003-07-15

申请号：AT00979562

申请日：2000-11-15

Applicant: BASF AG

Inventor： DEININGER JUERGEN ,  GOETZ WALTER ,  LUDWIG ALFONS ,  PIPPER GUNTER

IPC: C08J5/18 ,  C08G69/00 ,  C08G69/02 ,  C08G69/04 ,  C08G69/14 ,  C08G69/26 ,  C08G69/28 ,  C08G69/36 ,  C08G69/48 ,  D01F6/80

Abstract: A process for continuous production of copolyamides based on a lactam (I), a diamine (II) and a dicarboxylic acid (III) comprisesreacting a mixture (IV) comprising a diamine (II), a dicarboxylic acid (III) and water in a first reaction zone at a pressure in the range from 1.3*10 to 2.5*10 Pa in the entry zone of the reaction zone and at a temperature above the melting point of polymer (V) to a conversion, based on the molar amounts of diamine (II) and dicarboxylic acid (III), of at least 80% to form a polymer (V),reacting a mixture (VI) comprising lactam (I) and water in a second reaction zone at a pressure in the range from 5*10 to 40*10 Pa and at a temperature above the melting point of polymer (VII) to a conversion, based on the molar amount of lactam (I), of at least 80% to form a polymer (VII),then reacting polymer (V) and polymer (VII) with each other in a third reaction zone at a pressure in the range from 1*10 to 1.5*10 Pa in the entry zone of the reaction zone at temperatures above the melting point of polymer (VIII) to form a polymer (VIII), said polymer (VIII) having a 95° C. water extractables content, based on lactam (I), diamine (II) and dicarboxylic acid (III), of not more than 10% by weight, andthen extracting the polymer (VIII) with water to obtain the copolyamide.

公开(公告)号：BG106744A

公开(公告)日：2003-04-30

申请号：BG10674402

申请日：2002-05-28

Applicant: BASF AG

Inventor： LUDWIG ALFONS ,  PILLE RAGNHILD ,  PIPPER GUNTER

IPC: B29B13/06 ,  F26B17/12 ,  F26B21/14 ,  B26B13/06

Abstract: The invention relates to a device (1) for drying and thermally treating granulates with an inert gas stream. Said device has a cuboidal base body (2) consisting an inlet (3) for the granulate in the upper part and an outer (4) in the lower part. Said device has an inlet (5) on the side surface and an outlet (6) on the opposite side surfaces of the cuboidal base body (2) for the inert gas stream. Said device also comprises a distribution and retaining device (7,8) in the region of the inlet (5) and outlet (6) of the inert gas stream which substantially extend over the total vertical cross-section of the cuboidal base body (2). 6 claim, 4 figures

公开(公告)号：HU0204032A2

公开(公告)日：2003-03-28

申请号：HU0204032

申请日：2000-11-29

Applicant: BASF AG

Inventor： LUDWIG ALFONS ,  PILLE RAGNHILD ,  PIPPER GUNTER

IPC: B29B13/06 ,  F26B17/12 ,  F26B21/14

公开(公告)号：ES2177117T3

公开(公告)日：2002-12-01

申请号：ES98962392

申请日：1998-11-24

Applicant: BASF AG

Inventor： HUNGER HANS-HARALD ,  LUDWIG ALFONS ,  NEUBERG RAINER ,  PIPPER GUNTER ,  SAUER THOMAS ,  WILMS AXEL

IPC: C08G69/14 ,  C08G69/04 ,  C08G69/16 ,  C08G69/46

Abstract: The disclosure is a process for preparing polyamides by concentrating the wash water extract from the extraction of polyamide to an extractables content of not more than 85% by weight, adding fresh lactam down to a water content of from 0.5 to 13% by weight, and effecting at least one adiabatic expansion during the polymerization.

公开(公告)号：ES2172958T3

公开(公告)日：2002-10-01

申请号：ES98967143

申请日：1998-11-24

Applicant: BASF AG

Inventor： HILDENBRAND PETER ,  LANG REINHARD ,  LUDWIG ALFONS ,  PIPPER GUNTER

IPC: B29B9/16 ,  C08G69/16 ,  C08J3/12 ,  C08G69/46

Abstract: A process for continuous extraction of polyamide particles in an essentially vertical extraction column using an aqueous extractant comprises using an extraction column that is divided into two zones and performing an extraction with a recirculating 15-40% strength by weight aqueous epsi-caprolactam solution in the first zone and then with countercurrent water at a from 5 to 40° C. lower temperature in the second zone. The process provides for economical extraction of polyamides with a low level of monomers and oligomers.

公开(公告)号：SI1030872T1

公开(公告)日：2002-04-30

申请号：SI9830115

申请日：1998-11-24

Applicant: BASF AG

Inventor： HILDENBRAND PETER ,  LANG REINHARD ,  LUDWIG ALFONS ,  PIPPER GUNTER

IPC: C08G69/16 ,  C08G69/46

公开(公告)号：DE59803036D1

公开(公告)日：2002-03-21

申请号：DE59803036

申请日：1998-11-24

Applicant: BASF AG

Inventor： HILDENBRAND PETER ,  LANG REINHARD ,  LUDWIG ALFONS ,  PIPPER GUNTER

IPC: C08J3/12 ,  B29B9/16 ,  C08G69/16 ,  C08G69/46

Abstract: A process for continuous extraction of polyamide particles in an essentially vertical extraction column using an aqueous extractant comprises using an extraction column that is divided into two zones and performing an extraction with a recirculating 15-40% strength by weight aqueous epsi-caprolactam solution in the first zone and then with countercurrent water at a from 5 to 40° C. lower temperature in the second zone. The process provides for economical extraction of polyamides with a low level of monomers and oligomers.

公开(公告)号：TR200001513T2

公开(公告)日：2001-07-23

申请号：TR200001513

申请日：1998-11-24

Applicant: BASF AG

Inventor： HUNGER HANS-HARALD ,  LUDWIG ALFONS ,  PIPPER GUNTER ,  SAUER THOMAS ,  WILMS AXEL ,  NEUBERG RAINER

IPC: C08G69/14 ,  C08G69/04 ,  C08G69/16 ,  C08G69/46

Abstract: The disclosure is a process for preparing polyamides by concentrating the wash water extract from the extraction of polyamide to an extractables content of not more than 85% by weight, adding fresh lactam down to a water content of from 0.5 to 13% by weight, and effecting at least one adiabatic expansion during the polymerization.

公开(公告)号：HU0100943A2

公开(公告)日：2001-06-28

申请号：HU0100943

申请日：1999-02-22

Applicant: BASF AG

Inventor： DR FUCHS EBERHARD ,  HILDEBRANDT VOLKER ,  MOHRSCHLADT RALF ,  PIPPER GUNTER

IPC: C08G69/18 ,  C08G69/20

Abstract: In a process for producing polyamides by polymerization of lactams in the presence of metal oxides as heterogeneous catalysts, the metal oxides are used in a form which permits mechanical removal from the reaction mixture and are removed from the reaction mixture in the course of or on completion of the polymerization.

公开(公告)号：CA2394013A1

公开(公告)日：2001-06-07

申请号：CA2394013

申请日：2000-11-29

Applicant: BASF AG

Inventor： PIPPER GUNTER ,  LUDWIG ALFONS ,  PILLE RAGNHILD

IPC: B29B13/06 ,  F26B17/12 ,  F26B21/14

Abstract: The invention relates to a device (1) for drying and thermally treating granulates with an inert gas stream. Said device has a cuboidal base body (2 ) comprising an inlet (3) for the granulate in the upper part and an outlet (4 ) in the lower part. Said device has an inlet (5) on a side surface and an outlet (6) on the opposite side surfaces of the cuboidal base body (2) for t he inert gas stream. Said device also comprises a distribution and retaining device (7, 8) in the region of the inlet (5) and outlet (6) of the inert gas stream which substantially extend over the total vertical cross-section of t he cuboidal base body (2).