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公开(公告)号：SI1056799T1
公开(公告)日：2002-10-31
申请号：SI9830194
申请日：1998-11-24
Applicant: BASF AG
Inventor： HUENGER HANS-HARALD , LUDWIG ALFONS , NEUBERG RAINER , PIPPER GUNTER , SAUER THOMAS , WILMS AXEL
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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.
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公开(公告)号：DE19648747A1
公开(公告)日：1998-05-28
申请号：DE19648747
申请日：1996-11-25
Applicant: BASF AG
Inventor： EGLY HORST , HUENGER HANS-HARALD , SAUER THOMAS DR
IPC: C07D201/16 , C08J11/02 , C08J11/06 , C08L77/02 , C07D223/10
Abstract: A process for recovering caprolactam and its oligomers by removing inorganic impurities from aqueous polycaprolactam extracts, in which the aqueous extract is continuously passed through an evaporator in such a way that the impurities are deposited on the heat exchange surfaces of the evaporator.
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公开(公告)号：PL376961A1
公开(公告)日：2006-01-09
申请号：PL37696103
申请日：2003-10-18
Applicant: BASF AG
Inventor： PLACHETTA CHRISTOPH , HECKMANN MANFRED , HUENGER HANS-HARALD , WEISS ROBERT
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公开(公告)号：DE59702998D1
公开(公告)日：2001-03-22
申请号：DE59702998
申请日：1997-11-24
Applicant: BASF AG
Inventor： EGLY HORST , HUENGER HANS-HARALD , SAUER DR
IPC: C07D201/16
Abstract: A process for recovering caprolactam and its oligomers by removing inorganic impurities from aqueous polycaprolactam extracts, in which the aqueous extract is continuously passed through an evaporator in such a way that the impurities are deposited on the heat exchange surfaces of the evaporator.
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Patent Agency Ranking
公开(公告)号：DE19752181A1
公开(公告)日：1999-05-27
申请号：DE19752181
申请日：1997-11-25
Applicant: BASF AG
Inventor： HUENGER HANS-HARALD , LUDWIG ALFONS DR , NEUBERG RAINER DR , PIPPER GUNTER , SAUER THOMAS DR , WILMS AXEL DR
Abstract: Preparation of polyamides from a lactam(s) and optionally other monomers and additives and fillers comprises: (a) concentrating the extraction water from the extraction of polyamide to at most 85%; (b) adjusting the water content to 0.5-13 wt.% by adding fresh lactam; (c) exposing to polyamide forming conditions; and (d) adiabatically expanding during polymerization to reduce the water content.
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公开(公告)号：CA2503287A1
公开(公告)日：2004-05-06
申请号：CA2503287
申请日：2003-10-18
Applicant: BASF AG
Inventor： PLACHETTA CHRISTOPH , HECKMANN MANFRED , HUENGER HANS-HARALD , WEISS ROBERT
Abstract: Disclosed is a method for producing a polyamide containing titanium dioxide pigments. Said method is characterized by the fact that titanium dioxide pigments are dispersed in an initial mixture containing water and caprolacta m by means of a device comprising a dispersion chamber, a disk-shaped rotor th at is disposed inside said dispersion chamber, a stator that is provided with radial openings, is arranged within the dispersion zone of the dispersion chamber, and is connected to the rotor, a substance inlet located on each si de of the rotor, preferably with a respective axial duct section such that the two flows of substance are combined in the peripheral edge area of the rotor disk, and a product outlet which is placed on the outer edge of the dispersi on zone of the dispersion chamber, by feeding the titanium dioxide pigments to the dispersion chamber through one of said substance inlets while feeding th e initial mixture containing water and caprolactam to the dispersion chamber through the other of said substance inlets, whereby a product mixture containing water, caprolactam, and the used titanium dioxide pigment is obtained via the product outlet, and the product mixture is polymerized so a s to obtain a polyamide containing titanium dioxide pigments. Also disclosed a re polyamides obtained according to the inventive method and the use of such polyamides as a masterbatch.
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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.
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公开(公告)号：AT199145T
公开(公告)日：2001-02-15
申请号：AT97120566
申请日：1997-11-24
Applicant: BASF AG
Inventor： EGLY HORST , HUENGER HANS-HARALD , SAUER THOMAS DR
IPC: C07D201/16
Abstract: A process for recovering caprolactam and its oligomers by removing inorganic impurities from aqueous polycaprolactam extracts, in which the aqueous extract is continuously passed through an evaporator in such a way that the impurities are deposited on the heat exchange surfaces of the evaporator.
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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.
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