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    CONTINUOUS MANUFACTURE OF POLYESTERS
    3.
    发明专利
    CONTINUOUS MANUFACTURE OF POLYESTERS 未知

    公开(公告)号：CA953448A

    公开(公告)日：1974-08-20

    申请号：CA98379

    申请日：1970-11-17

    Applicant: BASF AG

    Inventor： BEER LUDWIG ,  FISCHER HERMANN ,  HEIL EDUARD

    IPC: C08G63/00 ,  B01J14/00 ,  C08G63/78

    Abstract: 1321115 Polymerisation apparatus BADISCHE ANILIN-& SODA-FABRIK AG 20 Nov 1970 [22 Nov 1969] 55205/70 Heading B1X [Also in Division C3] Apparatus used in the production of linear polyester by a continuous process in which diglycol terephthalate and/or its precondensate are polycondensed, optionally in the presence of other polyester-forming components, at a temperature of 240‹-300‹C at reduced pressure, comprise a bundle of stationary, substantially vertical heated tubes 1 surrounded by heating jacket 2 containing heating medium 3 immediately above which is located at least one hold tank 4, which may be heated, connected to a vacuum at outlet 5, the major portion or all of the heat required to heat the reaction mixture and evaporate the volatile portions thereof being applied to the tubes. Liquid catching surfaces 6 may be provided between tank 4 and vacuum outlet 5. The heating jacket surrounding the bundle of tubes may be divided into two separate zones, the temperature of the heating medium in the upper zone being higher than that in the lower zone. Bottle necks may be provided in the tubes by squeezing them to provide slot-like depressions using a suitable die or by inserting orifice plates or capillaries.

    PREPARATION OF POLYPHENYLENE ETHERS, AND AN APPARATUS FOR THIS PURPOSE
    6.
    发明专利
    PREPARATION OF POLYPHENYLENE ETHERS, AND AN APPARATUS FOR THIS PURPOSE 未知

    公开(公告)号：CA1263992A

    公开(公告)日：1989-12-19

    申请号：CA495489

    申请日：1985-11-15

    Applicant: BASF AG

    Inventor： BRANDT HERMANN ,  FISCHER HERMANN ,  DREHER HERMANN ,  HEIL EDUARD ,  HAMBRECHT JUERGEN ,  NAARMANN HERBERT ,  ECHTE ADOLF ,  GAUSEPOHL HERMANN ,  SIEBEL PETER ,  SWOBODA JOHANN ,  SCHWOEBEL GERD ,  NIKLES ALBERT

    IPC: B01J10/00 ,  B01J19/18 ,  C08G65/44

    Abstract: Disclosed is a process of preparation of polyphenylene ethers from monohydric phenols, which possess alkyl substituents in the two ortho-positions and, if desired, in the meta-position, but not in the para-position, by an oxidative coupling reaction with oxygen at from 15 to 50.degree.C and under from 1 to 10 bar in the presence of a catalyst complex, of a solvent and, if required, of an activator. In this process,the conversion of the phenols is carried out in two or more reaction zones. Some or all of the solvent, catalyst complex phenols and where relevant, activator are initially added to one of the reaction zones and are circulated in the other reaction zone and about 60-100% of the stoichiometric amount of oxygen required for the oxidative coupling is introduced into the first reaction zone and from 0 to about 40% of the said stoichiometric amount is introduced into the second reaction zone. This process is interesting in that it makes it possible to carry out oxidative coupling of phenols with oxygen in a very economic and reliable manner, with very high space-time yields, formation of only a small amount of by-products, and minimum emissions of gas and volatile components.

    CONTINUOUS PREPARATION OF NYLONS
    8.
    发明专利
    CONTINUOUS PREPARATION OF NYLONS 未知

    公开(公告)号：CA1222590A

    公开(公告)日：1987-06-02

    申请号：CA456616

    申请日：1984-06-14

    Applicant: BASF AG

    Inventor： PIPPER GUNTER ,  SCHMIDT FRANZ ,  THEYSOHN RAINER ,  RIEGGER SIEGFRIED ,  HEIL EDUARD ,  FISCHER HERMANN ,  THOMA RICHARD ,  MATTHIES PAUL

    IPC: C08G69/00 ,  C08G69/26 ,  C08G69/28 ,  C08L77/00

    Abstract: - 10 - O.Z. 0050/36564 Nylons are prepared by a continuous process in which, in a precondensation zone, an aqueous solution of a salt of a dicarboxylic acid of 6 to 18 carbon atoms and a diamine of 6 to 18 carbon atoms is heated to 250-300.degree.C under superatmospheric pressure, with simultaneous vaporization of water and formation of a prepolymer, the prepolymer and the vapor are separated, and the former is fed into a polycondensation zone and condensed under superatmospheric pressure of from 1 to 10 bar and at from 250 to 300.degree.C, wherein the aqueous salt solution is condensed under superatmospheric pressure of from 1 to 10 bar in the first third of the tubular precondensation zone provided with baffles, until the degree of conversion is not less than 93%, and the prepolymer and the vapor phase are brought into intimate contact with one another in the remaining two thirds of the precondensation zone.

    CONTINUOUS MANUFACTURE OF POLYBUTYLENE TEREPHTHALATES
    9.
    发明专利
    CONTINUOUS MANUFACTURE OF POLYBUTYLENE TEREPHTHALATES 未知

    公开(公告)号：CA1050694A

    公开(公告)日：1979-03-13

    申请号：CA248377

    申请日：1976-03-17

    Applicant: BASF AG

    Inventor： STREHLER HUGO ,  BEER LUDWIG ,  HEIL EDUARD ,  URBANEK FRIEDRICH ,  FISCHER HERMANN

    IPC: C08G63/00 ,  C08G63/78 ,  C08G63/85 ,  C08G63/18 ,  C08G63/24

    Abstract: A process for the continuous manufacture of linear, high molecular weight, polybutylene terephthalates, in which dimethyl terephthalate is trans-esterified with 1,4-butanediol, if desired in the presence of up to 40 mole% of other starting materials which form linear polyesters, in the molar ratio of from 1:1.2 to 1:1.5, in a plurality of successive stages at temperatures rising from 160 to 230.degree.C, the mixture thus obtained is passed, at from 230 to 270.degree.C and from 2 mm Hg to 20 mm Hg, upward through a bundle of stationary heated tubes, and immediately thereafter through a hold tank, with the proviso that the volume of the hold tank is at least 1/4 and at most 2.5 times the volume of the tube bundle and the mean residence time in the tube bundle and hold tank together is from 10 to 60 minutes, and the precondensate thus obtained is polycondensed at from 240 to 260.degree.C and from 0.1 to 2 mm Hg, with continuous formation of thin films. The polybutylene terephthalates manufactured by the above process may be used for the manufacture of products such as fibers, films, sheeting and injection moldings.

    Production of moulded articles of polyamides
    10.
    发明专利
    Production of moulded articles of polyamides 未知

    公开(公告)号：GB967144A

    公开(公告)日：1964-08-19

    申请号：GB2416963

    申请日：1963-06-18

    Applicant: BASF AG

    Inventor： FISCHER HERMANN ,  GROSSKINSKY OTTO-ALFRED

    IPC: B29C39/00 ,  C08G69/18

    Abstract: Polyamides are moulded by polymerizing lactams in the presence of alkaline catalysts and activators in a mould in which the pressure is sub-atmospheric, preferably 5 to 50 mm.Hg. above the boiling pressure of the lactam to be polymerized. In an example 8 parts of bis-(caprolactam-N-carboxylic acid)-hexamethylene-diamide (1,6) is dissolved in 92 parts of caprolactam at 80 DEG C., and 67 parts of caprolactam is melted with 33 parts of the reaction product of 3 parts of potassium with 97 parts of caprolactam and heated to 80 DEG C. The two melts are then mixed and fed into a mould at 85 DEG C. and a pressure of 10 mm.Hg. Numerous examples of catalysts and activators suitable for the process are given, specified lactams being pyrrolidone, piperidone, caprolactam, enantholactam, caprylolactam, capriclactam, laurolactam, C-methyl-e -caprolactam and dilactams.

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