-
公开(公告)号：CZ291565B6
公开(公告)日：2003-04-16
申请号：CZ20001929
申请日：1998-11-24
Applicant: BASF AG
Inventor： HUNGER HANS-HARALD , LUDWIG ALFONS , NEUBERG RAINER , PIPPER GUNTER , SAUER THOMAS , WILMS AXEL
Abstract: In the present invention there is disclosed a process for preparing polyamides, which preparation process is characterized in that water coming from polyamide extraction is concentrated to the extract content of at the most 85 percent by weight and subsequently is mixed with fresh lactam up to 0.5 to 13 percent by weight of water content, whereby during polymerization at least one adiabatic expansion is carried out.
-
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
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：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
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：LV10794A
公开(公告)日：1995-08-20
申请号：LV930477
申请日：1993-06-04
Applicant: BASF AG
Inventor： MATTHIES PAUL , HAHN KARL , MELL KARLHEINZ , SAUER THOMAS , WEINERT KLAUS , LAUN MARTIN , HABERKORN HERBERT
-
公开(公告)号：AU4317093A
公开(公告)日：1994-01-04
申请号：AU4317093
申请日：1993-05-25
Applicant: BASF AG
Inventor： MATTHIES PAUL , HAHN KARL , MELL KARLHEINZ , SAUER THOMAS , WEINERTH KLAUS , LAUN MARTIN , HABERKORN HERBERT
-
Patent Agency Ranking
公开(公告)号：SK283532B6
公开(公告)日：2003-09-11
申请号：SK150994
申请日：1993-05-25
Applicant: BASF AG
Inventor： MATTHIES PAUL , HAHN KARL , MELL KARLHEINZ , SAUER THOMAS , WEINERTH KLAUS , LAUN MARTIN , HABERKORN HERBERT
Abstract: Filaments with a relative viscosity RV of 2.0 to 3.0 (measured at a concentration of 1 g of fibres per 100 ml in a 96 wt. % sulphuric acid) based on polycaprolactam, obtainable by: (a) extruding a melt consisting essentially of caprolactam through a spinning nozzle to form caprolactam filaments; (b) cooling the filaments thus produced and (c) drawing the cooled filaments off at a rate of at least [3600 + 1250.(3.0 - RV)] m/min, the polycaprolactam used being produced in the presence of at least one bicarboxylic acid from the group: C4-C10-alkane bicarboxylic acids, C5-C8-cycloalkane bicarboxylic acids, benzole and naphthaline bicarboxylic acids which may have up to two sulphonic acid groups and whose carboxylic acid groups are not adjacent, N-C1-C6-alkyl-N,N-di(C4-C10-alkane carboxylic acid)amine, 1,4-piperazine-di(C1-C10-alkane carboxylic acid), and a process for producing these filaments, their use for the production of fibres and flat products, and fibres and flat products made of these filaments.
-
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
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：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
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：HU0100185A2
公开(公告)日：2001-05-28
申请号：HU0100185
申请日：1998-11-24
Applicant: BASF AG
Inventor： HUENGER HANS-HARALD , LUDWIG ALFONS , NEUBERG RAINER , PIPPER GUNTER , SAUER THOMAS , WILMS AXEL
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：CZ20001929A3
公开(公告)日：2000-11-15
申请号：CZ20001929
申请日：1998-11-24
Applicant: BASF AG
Inventor： HUENGER HANS-HARALD , LUDWIG ALFONS , NEUBERG RAINER , PIPPER GUNTER , SAUER THOMAS , WILMS AXEL
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.
-
-
-
-
-
-
-
-
-
Search Results
31
records
(took 0.022 seconds)
