-
公开(公告)号：CZ290277B6
公开(公告)日：2002-06-12
申请号：CZ20001930
申请日：1998-11-24
Applicant: BASF AG
Inventor： HILDEBRAND PETER , LANG REINHARD , LUDWIG ALFONS , PIPPER GUNTER
Abstract: Disclosed is a continuous extraction process of polyamide particles by means of a circulating aqueous extraction solution within a closed circuit and in substantially stand-up extraction column divided in two zones, wherein in the first zone polyamide is treated with aqueous solution of {epsilon}-caprolactam with concentration ranging within 15 to 40 percent by weight as an extraction agent at a temperature ranging from 100 to 140 degC and subsequently in the second zone it is additionally extracted with water with temperature being by 5 to 40 degC lower. The invented process enables economical manufacture of polyamide with low content of monomer and oligomers.
-
公开(公告)号：HU0100525A2
公开(公告)日：2001-06-28
申请号：HU0100525
申请日：1998-11-24
Applicant: BASF AG
Inventor： ERBES JOERG , LUDWIG ALFONS , PIPPER GUNTER
Abstract: A process for continuous extraction of polyamide particles using a recirculating extractant in a vertical extraction column that is divided into two zones comprises treating the polyamide with an aqueous extractant comprising from 40 to 95% by weight of epsi-caprolactam in a first zone at from 100 to 140° C., and then effecting an aftertreatment with water in a second zone. The caprolactam can then be extracted in a conventional manner. The process provides for economical production of polyamide having a low dimer content.
-
公开(公告)号：AU1700601A
公开(公告)日：2001-06-12
申请号：AU1700601
申请日：2000-11-15
Applicant: BASF AG
Inventor： DEININGER JURGEN , GOTZ 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：DE19957664A1
公开(公告)日：2001-05-31
申请号：DE19957664
申请日：1999-11-30
Applicant: BASF AG
Inventor： LUDWIG ALFONS , PILLE RAGNHILD , PIPPER GUNTER
Abstract: Device for drying and heat treatment of granulates with an inert gas stream has a rectangular base with granulate inlet/outlet (3,4) at the top and bottom. Inert gas inlet/outlets (5,6) are fitted on opposite sides of the base. Perforated metal sheet or mesh partitions are fitted across the whole surface of the walls containing the gas inlet and outlet to slow down and distribute the gas stream. Device for drying and heat treatment of granulates with a stream of inert gas has a rectangular base with a granulate inlet (3) at the top and outlet (4) at the bottom. An inert gas inlet (5) and outlet (6) are fitted on opposite sides of the base. Perforated metal sheet or mesh partitions are fitted across the whole surface of the walls containing the gas inlet and outlet to slow down and distribute the gas stream. Independent claims are included for: (a) a process for drying and post-condensation of a polycondensate granulate in which: (1) the condensate is dried in one or more devices as described above at a temperature between a minimum of 105 - 120 deg C (sic) and 2 deg C below its softening point; (2) it is post-treated; and (3) cooled; (b) a plant for drying and post-condensation of a polycondensate granulate comprising one or more devices as described above, a post-treatment apparatus and a cooler.
-
公开(公告)号：SK6982000A3
公开(公告)日：2000-11-07
申请号：SK6982000
申请日：1998-11-24
Applicant: BASF AG
Inventor： ERBES JORG , LUDWIG ALFONS , PIPPER GUNTER
Abstract: A process for continuous extraction of polyamide particles using a recirculating extractant in a vertical extraction column that is divided into two zones comprises treating the polyamide with an aqueous extractant comprising from 40 to 95% by weight of epsi-caprolactam in a first zone at from 100 to 140° C., and then effecting an aftertreatment with water in a second zone. The caprolactam can then be extracted in a conventional manner. The process provides for economical production of polyamide having a low dimer content.
-
Patent Agency Ranking36.发明专利
公开(公告)号：DE19816955A1
公开(公告)日：1999-10-21
申请号：DE19816955
申请日：1998-04-17
Applicant: BASF AG
Inventor： EICHENAUER ULRICH , NEUFELD ECKHARD , LUDWIG ALFONS , SAUER THOMAS , ULZHOEFER ANGELA
IPC: C08G65/46 , C08J3/07 , C09D171/10 , C09D181/06 , C08L81/06 , C08J3/02 , C09D5/02
Abstract: In the production of dispersions by spraying a solution containing polyarylene-ether-sulfone (I) into an agitated coagulation bath, the solution contains 0.5-5 wt.% (I) and the average particle size (d50) of the primary particles in the dispersion is up to 100 nm. Independent claims are also included for: (a) Dispersions produced in this way; (b) coatings produced from the dispersions; (c) the coating process; and (d) coated household articles.
-
37.发明专利
公开(公告)号：CZ67599A3
公开(公告)日：1999-06-16
申请号：CZ67599
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.
-
公开(公告)号：AU1963899A
公开(公告)日：1999-06-15
申请号：AU1963899
申请日：1998-11-24
Applicant: BASF AG
Inventor： HILDENBRAND PETER , LANG REINHARD , LUDWIG ALFONS , PIPPER GUNTER
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：AU1757199A
公开(公告)日：1999-06-15
申请号：AU1757199
申请日：1998-11-24
Applicant: BASF AG
Inventor： ERBES JORG , LUDWIG ALFONS , PIPPER GUNTER
Abstract: A process for continuous extraction of polyamide particles using a recirculating extractant in a vertical extraction column that is divided into two zones comprises treating the polyamide with an aqueous extractant comprising from 40 to 95% by weight of epsi-caprolactam in a first zone at from 100 to 140° C., and then effecting an aftertreatment with water in a second zone. The caprolactam can then be extracted in a conventional manner. The process provides for economical production of polyamide having a low dimer content.
-
公开(公告)号：TR9900422T2
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
-
-
-
-
-
-
-
-
-
Search Results
116
records
(took 0.026 seconds)
