公开(公告)号：TR200001511T2

公开(公告)日：2002-07-22

申请号：TR200001511

申请日：1998-11-24

Applicant: BASF AG

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

IPC: B29B9/16 ,  C08J3/12 ,  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：DE59803946D1

公开(公告)日：2002-05-29

申请号：DE59803946

申请日：1998-11-24

Applicant: BASF AG

Inventor： HUENGER 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：DE19957663A1

公开(公告)日：2001-05-31

申请号：DE19957663

申请日：1999-11-30

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 ,  C08L77/00 ,  D01F6/60

Abstract: Continuous production of copolyamides (I) based on a lactam (A), a diamine (B) and a dicarboxylic acid (C) comprises a three step reaction sequence to form a polymer containing up to 10 wt.% material extractable by hot water at 95 deg C comprising (A), (B) or (C). The polymer is extracted with water to form the copolyamide product (I). A process for the continuous production of copolyamides (I) based on a lactam (A), a diamine (B) and a dicarboxylic acid (C) comprises conversion of a mixture comprising diamine (B), dicarboxylic acid (C) and water in a first reaction zone at 1.3x10 -2.5x10 Pa to a degree of conversion of at least 80 % (with respect to molar quantities of (B) and (C)) to form a polymer (D) at a temperature above the m.pt. of (D) and conversion of a mixture comprising lactam (A) and water in a second reaction zone at 5x10 -40x10 Pa to a degree of conversion of at least 80 % (with respect to molar quantity of (A)) to form a polymer (E) at above the m.pt. of (E) followed by reaction of (D) and (E) in a third reaction zone at 1x10 -1.5x10 to form a polymer (F) at above the m.pt. of (F) whereby (F) contains up to 10 wt.% material extractable by hot water at 95 deg C comprising (A), (B) and/or (C). The polymer (F) is extracted with water to form the copolyamide product (I). Independent claims are included for the copolyamide product (I) and fiber, sheet and molded articles produced using (I).

公开(公告)号：BG104465A

公开(公告)日：2001-01-31

申请号：BG10446500

申请日：2000-05-22

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: A process is disclosed for producing polyamides. The extracted water produced from polyamide extraction is concentrated up to an extract content of maximum 85 wt. % and is mixed with fresh lactam up to a 0.5-13 wt. % water content, at least one adiabatic stress relief being carried out during polymerization. 12 claims, 2 figures

公开(公告)号：AU5075100A

公开(公告)日：2000-12-28

申请号：AU5075100

申请日：2000-06-05

Applicant: BASF AG

Inventor： MOHRSCHLADT RALF ,  HILDEBRANDT VOLKER ,  LUDWIG ALFONS

IPC: C08G69/04 ,  C08G69/16 ,  C08G69/18 ,  C08G69/20

Abstract: A process for producing polyamides by reacting at least one lactam and optionally further polyamide-forming monomers with aqueous monomer and oligomer extracts obtained during the extraction with water of the polymer product obtained in the production of polyamides, the water content of the reaction mixture being in the range from 0.5 to 13% by weight comprises conducting the reaction in the presence of metal oxides, beta-zeolites, sheet-silicates or silica gels, which may be doped, as heterogeneous catalysts, the heterogeneous catalysts being used in the form which permits mechanical removal from the reaction mixture and are removed from the reaction mixture in the course of the polymerization or after it has ended.

公开(公告)号：DE19925906A1

公开(公告)日：2000-12-14

申请号：DE19925906

申请日：1999-06-07

Applicant: BASF AG

Inventor： MOHRSCHLADT RALF ,  HILDEBRANDT VOLKER ,  LUDWIG ALFONS

IPC: C08G69/04 ,  C08G69/16 ,  C08G69/18 ,  C08G69/20

Abstract: The invention relates to a method for preparing polyamides by reacting at least one lactam and optionally other polyamide-forming monomers with aqueous monomeric and oligomeric extracts obtained when the polymer is extracted with water in the production of polyamides, whereby the water content of the reaction mixture ranges from 0.5 to 13 percent by weight. According to said method, reaction is carried out in the presence of metal oxides, beta zeolites, sheet silicates or silica gels which may de doped as heterogeneous catalysts. The heterogeneous catalysts are used in a form enabling mechanical separation from the reaction mixture and removal from the reaction mixture during or after conclusion of polymerization

公开(公告)号：CA2375648A1

公开(公告)日：2000-12-14

申请号：CA2375648

申请日：2000-06-05

Applicant: BASF AG

Inventor： LUDWIG ALFONS ,  HILDEBRANDT VOLKER ,  MOHRSCHLADT RALF

IPC: C08G69/04 ,  C08G69/16 ,  C08G69/18 ,  C08G69/20

Abstract: The invention relates to a method for preparing polyamides by reacting at least one lactam and optionally other polyamide-forming monomers with aqueou s monomeric and oligomeric extracts obtained when the polymer is extracted wit h water in the production of polyamides, whereby the water content of the reaction mixture ranges from 0.5 to 13 percent by weight. According to said method, reaction is carried out in the presence of metal oxides, beta zeolites, sheet silicates or silica gels which may de doped as heterogeneous catalysts. The heterogeneous catalysts are used in a form enabling mechanica l separation from the reaction mixture and removal from the reaction mixture during or after conclusion of polymerization

公开(公告)号：CZ20001930A3

公开(公告)日：2000-11-15

申请号：CZ20001930

申请日：1998-11-24

Applicant: BASF AG

Inventor： HILDEBRAND 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：SK6972000A3

公开(公告)日：2000-11-07

申请号：SK6972000

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：DE59505719D1

公开(公告)日：1999-05-27

申请号：DE59505719

申请日：1995-07-28

Applicant: BASF AG

Inventor： KRONER MATTHIAS ,  SCHORNICK GUNNAR ,  FEINDT HANS-JACOB ,  MEYER THOMAS ,  LUDWIG ALFONS ,  METZMANN UDO

IPC: C02F5/12 ,  C08G69/10 ,  C08G73/06 ,  C08G73/10 ,  C11D3/37

Abstract: PCT No. PCT/EP95/03003 Sec. 371 Date Feb. 12, 1997 Sec. 102(e) Date Feb. 12, 1997 PCT Filed Jul. 28, 1995 PCT Pub. No. WO96/05241 PCT Pub. Date Feb. 22, 1996A process for preparing polyaspartic acid by polycondensation of fine-particle aspartic acid at temperatures above 150 DEG C. in the presence of acidic catalysts, wherein first contact between the acidic catalysts and the fine-particle aspartic acid takes place in the reaction zone where the polycondensation takes place.