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    Process for the removal of the catalyst from polyphenylene ethers
    25.
    发明专利
    Process for the removal of the catalyst from polyphenylene ethers 未知

    公开(公告)号：DE3342178A1

    公开(公告)日：1985-05-30

    申请号：DE3342178

    申请日：1983-11-23

    Applicant: BASF AG

    Inventor： REFFERT RUDI WILHELM ,  HAMBRECHT JUERGEN DR ,  BAER KARL DR ,  HEIL EDUARD ,  ECHTE ADOLF DR

    IPC: C08G65/46

    Abstract: The invention relates to a process for the removal of the metal component of the catalyst from a polyphenylene ether solution produced in the preparation of high-molecular-weight polyphenylene ethers from monohydric phenols by oxidative coupling reaction with oxygen in the presence of a catalyst complex comprising a metal salt and an organic amine in the presence of a solvent and optionally an activator, by treatment with a precipitant which is a solid chemical reagent which is insoluble in the polyphenylene ether solution, and has been applied to an inert support substance which is adsorbent with respect to the precipitated substances. The precipitant is an organic P-, S-, O- or N-containing compound or an inorganic P or S compound which is soluble in water or aqueous acid solution, the support substance is a solid material of any desired shape with a specific surface area of from 50 to 1500 m /g and a porosity of between 50 and 75% which is insoluble in water, acid and organic solvents.

    CONTINUOUS MANUFACTURE OF POLYAMIDES
    27.
    发明专利
    CONTINUOUS MANUFACTURE OF POLYAMIDES 未知

    公开(公告)号：AU7928175A

    公开(公告)日：1976-09-23

    申请号：AU7928175

    申请日：1975-03-19

    Applicant: BASF AG

    Inventor： MERTES FRIEDERICH ,  DOERFEL HELMUT ,  HEIL EDUARD ,  CORDES CLAUS

    IPC: C08G69/00 ,  C08G69/04 ,  C08G69/28 ,  C08G69/36 ,  G01N30/91 ,  C08G20/02

    Abstract: An improved process for the continuous manufacture of polyamides by continuously conveying the aqueous solution of a salt of essentially equivalent amounts of a diamine, or of a mixture of several diamines, and of a dicarboxylic acid, or of a mixture of several dicarboxylic acids, or of mixtures of such salts with lactams and/or aminocarboxylic acids, through several reaction zones under polyamide-forming conditions, wherein the mixture of starting materials is heated, in a first reaction zone, to from 200 DEG to 300 DEG C, preferably from 220 DEG to 280 DEG C, at pressures which are above the corresponding saturation vapor pressure of water and prevent the formation of a vapor phase, the pressure action on the polycondensation mixture is released in a second reaction zone and condensation of the mixture, to form high molecular weight polyamides, is then completed in further reaction stages. According to the invention, A. THE MIXTURE OF STARTING MATERIALS IS HEATED, IN THE FIRST REACTION ZONE, UNTIL THE POLYCONDENSATION CONVERSION IS AT LEAST 80% AND PREFERABLY 90%, B. IN THE SECOND ZONE THE PRESSURE ACTING ON THE POLYCONDENSATION MIXTURE IS RELEASED, ADIABATICALLY, TO LEVELS OF NOT LESS THAN 3 ATMOSPHERES, PREFERABLY NOT LESS THAN 5 ATMOSPHERES, AND NOT MORE THAN 20 ATMOSPHERES, PREFERABLY NOT MORE THAN 15 ATMOSPHERES, SO AS TO REACH TEMPERATURES BELOW 215 DEG C, preferably 210 DEG C, c. the polycondensation mixture is then heated in a third reaction zone, comprising a heat exchanger consisting of heat exchange elements connected in parallel, to from 220 DEG to 330 DEG C, preferably from 250 DEG to 300 DEG C, in the course of less than 5 minutes and preferably less than 1 minute, the heating being carried out preferably in the presence of the water vapor formed during the adiabatic release of the pressure (in stage b), with application of heat and evaporation of the bulk of the water, at the pressure level to which the pressure has previously been released or at a lower pressure, and D. IN FURTHER REACTION STAGES, THE CONDENSATION IS COMPLETED, UNDER THE CONDITIONS PREVAILING AT THE END OF THE THIRD REACTION ZONE AND, FINALLY, BY CONVENTIONAL METHODS, TO FORM HIGH MOLECULAR WEIGHT POLYAMIDES.

    PREPARATION OF POLYPHENYLENE ETHERS, AND AN APPARATUS FOR THIS PURPOSE
    29.
    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
    30.
    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.

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