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    CONTINUOUS POLYAMIDE EXTRACTION PROCESS
    132.
    发明专利
    CONTINUOUS POLYAMIDE EXTRACTION PROCESS 未知

    公开(公告)号：CA2310849A1

    公开(公告)日：1999-06-03

    申请号：CA2310849

    申请日：1998-11-24

    Applicant: BASF AG

    Inventor： LUDWIG ALFONS ,  ERBES JORG ,  PIPPER GUNTER

    IPC: C08J3/12 ,  B01D11/02 ,  B29B9/16 ,  C08G69/00 ,  C08G69/04 ,  C08G69/16 ,  C08G69/46

    Abstract: A process is disclosed for continuously extracting polyamide particles from a circulating extraction solution in a vertical extraction column subdivided into two zones. The polyamide is treated in the first zone with an aqueous .epsilon.-caprolactam solution with 40-95 wt. % .epsilon.-caprolactam as extraction agent at 100 to 140 ~C, then subsequently treated with water in the second zone. Finally, the caprolactam can be extracted in a manner known per se. The process allows polyamide with a low dimer content to be economically produced.

    CONTINUOUS POLYAMIDE EXTRACTION PROCESS
    133.
    发明专利
    CONTINUOUS POLYAMIDE EXTRACTION PROCESS 未知

    公开(公告)号：CA2310848A1

    公开(公告)日：1999-06-03

    申请号：CA2310848

    申请日：1998-11-24

    Applicant: BASF AG

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

    IPC: C08J3/12 ,  B29B9/16 ,  C08G69/16 ,  C08G69/46

    Abstract: A process is disclosed for continuously extracting polyamide particles from a circulating extraction solution in a vertical extraction column subdivided into two zones. The polyamide is treated in the first zone with an aqueous .epsilon.-caprolactam solution with 15-40 wt. % .epsilon.-caprolactam as extraction agent at 100 to 140 ~C, and water is then used in the second zone as extraction agent at a temperature 5-40 ~C lower. The process allows polyamides with a low monomer and oligomer content to be economically extracted.

    134.
    发明专利
    未知

    公开(公告)号：ES2128571T3

    公开(公告)日：1999-05-16

    申请号：ES94920959

    申请日：1994-06-20

    Applicant: BASF AG

    Inventor： PIPPER GUNTER ,  KLEINKE ANDREAS ,  HILDENBRAND PETER

    IPC: C08G69/14 ,  B01J19/28 ,  C08G69/04 ,  C08G69/16 ,  C08G69/46

    Abstract: PCT No. PCT/EP94/01998 Sec. 371 Date Dec. 28, 1995 Sec. 102(e) Date Dec. 28, 1995 PCT Filed Jun. 20, 1994 PCT Pub. No. WO95/01389 PCT Pub. Date Jan. 12, 1995A process for the continuous production of polyamides from a mixture of at least one lactam and water and, if required, other monomer units and/or conventional additives and fillers under polyamide-forming conditions, where the mixture of the starting materials is heated in liquid phase in a first reaction zone until a conversion of at least 70% is reached, and undergoes adiabatic decompression and further polymerization in another reaction zone, wherein, in the first reaction zone, 0.5-7% by weight of water are employed, the temperature is increased to the range from 220 DEG to 310 DEG C., and polymerization is carried out until a conversion of at least 85% is reached and, in the second reaction zone, after the decompression further polymerization is carried out in the range from 215 DEG to 300 DEG C. without heat input.

    136.
    发明专利
    未知

    公开(公告)号：DE19731230A1

    公开(公告)日：1999-01-28

    申请号：DE19731230

    申请日：1997-07-21

    Applicant: BASF AG

    Inventor： GOTTSCHALK AXEL DR ,  GRUTKE STEFAN DR ,  PIPPER GUNTER ,  WOLF PETER DR ,  WEBER MARTIN DR

    IPC: C08L23/02 ,  C08L25/10 ,  C08L51/04 ,  C08L55/02 ,  C08L71/10 ,  C08L77/00 ,  C08L77/06 ,  C08L71/12 ,  C08L25/08 ,  C08K7/00 ,  C08J5/00 ,  C08J5/18 ,  D01F6/80 ,  C08G69/28 ,  C08G69/30

    Abstract: A moulding composition comprising: (a) 5-95 wt.% random copolyamide (I) of (a1) 95.1-99.9 wt.% component (IA) of equimolar amounts of linear aliphatic diamine(s) and linear aliphatic dicarboxylic acid(s) and (a2) 0.1-4.9 wt.% component (IB) of equimolar amounts of linear aliphatic diamine(s) and isophthalic acid; and (b) 5-95 wt.% other copolymer (II), selected from (b1) optionally modified polyarylene ether(s) (IIA), (b2) component (IIB) a mixture of 60-99 wt.% (co)polyolefin(s) (IIB.1) and 1-40 wt.% modified (co)polyolefin(s) (IIB.2) or (b3) a component (IIC) comprising 70-100 wt.% styrene-acrylonitrile (SAN), acrylonitrile-butadiene-styrene (ABS) and/or acrylonitrile-styrene-acrylic ester (ASA) polymer(s) (IIC.1) and 0-30 wt.% modified SAN, ABS or ASA polymer(s) (IIC.2). The composition may also contain: (c) 0-20 wt.% impact modifier(s), (d) 0-50 wt.% filler(s) and (e) 0-20 wt.% usual additives. Also claimed are: (i) a method of producing the composition; and (ii) mouldings, fibers, or films produced from the composition.

    Continuous preparation of poly:amide(s) from omega-amino:alkyl nitrile and water
    139.
    发明专利
    Continuous preparation of poly:amide(s) from omega-amino:alkyl nitrile and water 未知

    公开(公告)号：DE19635077A1

    公开(公告)日：1998-03-05

    申请号：DE19635077

    申请日：1996-08-30

    Applicant: BASF AG

    Inventor： WEIS ROBERT DR ,  KRAUS DIETER ,  KELLER DIETER ,  PIPPER GUNTER ,  HARDER WOLFGANG DR

    IPC: C08G69/04 ,  C08G69/08 ,  C08G69/28 ,  C08G69/36 ,  C08G69/00

    Abstract: A continuous multi-step process for the preparation of polyamides by reacting an w-aminoalkyl nitrile with water at high temperature and pressure, comprises (1) heating an w-aminoalkyl nitrile in an excess amount of water at 250-350 deg C and 4-30 MPa, the temperature and pressure being chosen to give a single-phase liquid reaction mixture, in which at least 95 mol.% nitrile groups are converted to form a first reaction product (I); (2) heating (I) at 220-300 deg C and 1-7 MPa, so that the pressure is at least 0.5 MPa less than that in step (1), whilst separating the gas and liquid phases to form a second reaction product (II); (3) heating (II) at 220-300 deg C and 10-300 kPa in a first sub-step (3a), then in a second sub-step (3b) the gas phase is separated from the liquid phase and then in a third sub-step (c) the relative viscosity (measured at 25 deg C and a concentration of 1 g polymer per 100 ml sulphuric acid (96 wt.%)) of the polyamide is altered to a value of 1.6-3.5 by selecting the appropriate temperature and dwell time, whilst in the final sub-step (3d) the third reaction product (III) is isolated by standard techniques and optionally processed.

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