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公开(公告)号：TR199900422T2
公开(公告)日：1999-04-21
申请号：TR9900422
申请日：1997-08-26
Applicant: BASF AG
Inventor： WEISS ROBERT , KRAUSS DIETER , KELLER DIETER , PIPPER GUNTER , HARDER WOLFGANG , LUDWIG ALFONS , MOHRSCHLADT RALF
Abstract: A process for preparing a polyamide by reacting at least one aminonitrile with water comprises:(1) reacting at least one aminonitrile with water at a temperature from 100 to 360° C. and a pressure from 0.1 to 35x106 Pa to obtain a reaction mixture,(2) further reacting the reaction mixture at a temperature from 150 to 400° C. and a pressure which is lower than the pressure in step 1, the temperature and the pressure being selected so as to obtain a first gas phase and a first liquid or a first solid phase or a mixture of first solid and first liquid phase, and the first gas phase is separated from the first liquid or the first solid phase or from the mixture of first liquid and first solid phase, and(3) admixing the first liquid or the first solid phase or the mixture of first liquid and first solid phase with a gaseous or liquid phase comprising water at a temperature from 150 to 360° C. and a pressure from 0.1 to 30x106 Pa to obtain a product mixture.
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公开(公告)号：CA2264023A1
公开(公告)日：1998-03-05
申请号：CA2264023
申请日：1997-08-26
Applicant: BASF AG
Inventor： MOHRSCHLADT RALF , LUDWIG ALFONS , KRAUSS DIETER , PIPPER GUNTER , KELLER DIETER , HARDER WOLFGANG , WEISS ROBERT
Abstract: A process for producing a polyamide by reacting at least one aminonitrile with water has the following steps: (1) at least one aminonitrile is reacted with water at a temperature from 100 to 360 ~C and pressure from 0.1 to 35.x 106 Pa, yielding a reaction mixture; (2) the reaction mixture is further reacted at a temperature from 150 to 400 ~C and pressure lower than the pressure in step 1. The temperature and pressure are selected to yield a first gaseous phase and a first liquid or solid phase or a mixture of a first solid and a first liquid phase. The first gaseous phase is separated from the first liquid or solid phase or the mixture of a first liquid and a first solid phase is separated; and (3) the first liquid or solid phase or the mixture of a first liquid and first solid phase is mixed with a water-containing gaseous or liquid phase at a temperature from 150 to 360 ~C and pressure from 0.1 to 30 x 106 Pa, yielding a product mixture. Also disclosed are other embodiments of this process and the thus produced polyamides.
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公开(公告)号：PL197246B1
公开(公告)日：2008-03-31
申请号：PL36481800
申请日：2000-11-29
Applicant: BASF AG
Inventor： LUDWIG ALFONS , PILLE RAGNHILD , PIPPER GUNTER
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公开(公告)号：MY129533A
公开(公告)日：2007-04-30
申请号：MYPI9805229
申请日：1998-11-18
Applicant: BASF AG
Inventor： LUDWIG ALFONS , PIPPER GUNTER , HILDENBRAND PETER , LANG REINHARD
Abstract: A PROCESS FOR CONTINUOUS EXTRACTION OF POLYAMIDE PARTICLES IN AN ESSENTIALLY VERTICAL EXTRACTION COLUMN (1) USING AN AQUEOUS EXTRACTANT COMPRISES USING AN EXTRACTION COLUMN (1) THAT IS DIVIDED INTO TWO ZONES (2,3) AND PERFORMING AN EXTRACTION WITH A RECIRCULATING 15-40% STRENGTH BY WEIGHT AQUEOUS &egr;-CAPROLACTAM SOLUTION IN THE FIRST ZONE (2) AND THEN WITH COUNTERCURRENT WATER AT A FROM 5 TO 40°C. LOWER TEMPERATURE IN THE SECOND ZONE (3). THE PROCESS PROVIDES FOR ECONOMICAL EXTRACTION OF POLYAMID S WITH A LOW LEVEL OF MONOMERS AND OLIGOMERS. (SOLE
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公开(公告)号：BG64318B1
公开(公告)日：2004-09-30
申请号：BG10445900
申请日：2000-05-18
Applicant: BASF AG
Inventor： HILDENBRAND PETER , LANG REINHARD , LUDWIG ALFONS , PIPPER GUNTER
Abstract: A process is disclosed for continuously extracting polyamide articles from a circulating extraction solution in a vertical reaction column subdivided into two zones. In the first zone the polyamide is treated with an aqueous epsilon-caprolactam solution with 15 to 40 wt. % epsilon-caprolactam as extraction agent at 100 to 140 degrees C and water is then used in the second zone as extraction agent at a temperature 5 to 40 degrees C lower. The process allows polyamides with a low monomer and oligomer content to be economically extracted. 10 claims, 1 figure
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Patent Agency Ranking
公开(公告)号：ES2198313T3
公开(公告)日：2004-02-01
申请号：ES00935168
申请日：2000-06-05
Applicant: BASF AG
Inventor： MOHRSCHLADT RALF , HILDEBRANDT VOLKER , LUDWIG ALFONS
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.
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公开(公告)号：SI1235671T1
公开(公告)日：2003-12-31
申请号：SI200030206
申请日：2000-11-29
Applicant: BASF AG
Inventor： LUDWIG ALFONS , PILLE RAGNHILD , PIPPER GUNTER
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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.
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公开(公告)号：AT238370T
公开(公告)日：2003-05-15
申请号：AT00935168
申请日：2000-06-05
Applicant: BASF AG
Inventor： MOHRSCHLADT RALF , HILDEBRANDT VOLKER , LUDWIG ALFONS
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.
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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
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
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