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公开(公告)号：DE3315802A1
公开(公告)日：1984-10-31
申请号：DE3315802
申请日：1983-04-30
Applicant: BASF AG
Inventor： REFFERT RUDI WILHELM , HAMBRECHT JUERGEN DR , ECHTE ADOLF DR , HEIL EDUARD , SIEBEL PETER DR , SWOBODA JOHANN DR
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Patent Agency Ranking
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
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.
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公开(公告)号：CA1050195A
公开(公告)日：1979-03-06
申请号：CA222674
申请日：1975-03-20
Applicant: BASF AG
Inventor： MERTES FRIEDRICH , DOERFEL HELMUT , HEIL EDUARD , CORDES CLAUS
Abstract: A process for the manufacture of a polyamide 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, through several reaction zones under polyamide-forming conditions, wherein (a) in a first reaction zone the mixture of starting materials is heated to a temperature of at least 220.degree.C, but not higher than 300.degree.C, at a pressure which is above the corresponding saturation vapor pressure of water and prevents the formation of a vapor phase, until the polycondensation conversion is at least 80%, but without completing the condensation in this zone, (b) in a second zone the pressure acting on the polycondensation mixture is released, adiabatically, to levels of not less than 3 atmospheres, and not more then 20 atmospheres, so as to reach temperatures below 215.degree.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 to 330.degree.C, in the course of less than 5 minutes, with evaporation of the bulk of the water, at the pressure level to which the pressure had previously been released or at a lower pressure, (d) in a fourth reaction zone the polycondensation mixture is separated from the water vapor, and (e) finally the condensation is completed under the conditions prevailing at the end of the third reaction zone to form a high molecular weight filamentforming polyamide.
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公开(公告)号：GB1138627A
公开(公告)日：1969-01-01
申请号：GB138866
申请日：1966-01-12
Applicant: BASF AG
Inventor： SLIWKA WOLFGANG , HEIL EDUARD
Abstract: 1,138,627. Removing heat in polymerization reactions. BADISCHE ANILIN- & SODAFABRIK A.G. 12 Jan., 1966, No. 1388/66. Heading C3P. [Also in Division B1] Heat of reaction, evolved in the emulsion, suspension or solution polymerization of olefinically unsaturated monomers in a reactor, is removed by evaporating one or more liquids contained in the dispersion or solution, condensing the vapour in a condenser and returning the condensate to the reactor, the polymerization being carried out in a closed system (i.e. a system in which the reactor is in pressure communication with the condenser but not with the external atmosphere, so that the pressure in reactor and condenser may be fixed independently of atmospheric pressure) and the internal temperature of the reactor being maintained constant by a self-regulating action wherein the internal temperature of the reactor controls a regulating means which regulates the rate of condensation in the condenser which, in turn, controls the internal temperature of the reactor. An apparatus adapted for such a controlled polymerization process is described. Examples describe the polymerization, in aqueous medium, of (a) vinyl propionate, (b) acrylamide with acrylic acid and (c) vinyl chloride with vinyl propionate.
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公开(公告)号：GB1124610A
公开(公告)日：1968-08-21
申请号：GB5536365
申请日：1965-12-31
Applicant: BASF AG
Inventor： HERRLE KARL , BAUMAN KARL HEINZ , BECKMANN WILHELM , HEIL EDUARD
Abstract: A process for the continuous emulsion polymerization of conventional olefinically unsaturated monomers which are practically insoluble or at most partly soluble in water, in aqueous medium in the presence of conventional polymerization catalysts, comprises continuous supplying monomers exclusively in the form of a preformed aqueous emulsion through a tube in an upward flow at a flow velocity of 5 to 100 cm. per sec. to the lower part of a vertically arranged circulation system, blending with an excess of polymer dispersion which has already formed, and polymerizing in the circulation system without the use of mechanical stirrers to a mean conversion of more than 75%, the polymer dispersion being withdrawn at a point not higher than the point of entry of the monomer emulsion into the circulation system and at the same rate as the monomer emulsion is supplied. Optional process features include preblending of monomer with polymer, a temperature difference between ascending and descending parts, bubbling inert gas through the ascending part, boiling the ascending dispersion with the aid of reduced pressure, and complex circulation systems. In examples, monomers polymerized are: (1) butyl acrylate-acrylic acid, (2) and (3) methyl methacrylate in the presence of dispersed polymethyl methacrylate, (4) and (5) butyl acrylate-vinyl acetate-acrylic acid, (6) and (7) vinyl propionate-sodium vinyl sulphonate, (8) styrene-acrylic acid-acrylonitrile, (9) vinylidene chloride-acrylonitrile-methacrylamide and (10) butyl acrylate-vinyl acetate-sodium vinyl sulphonate-acrylic acid; the catalyst being potassium persulphate or azodiisobutyronitrile and the emulsifier being selected from dodecylbenzene sulphonate, C10-C16-alkyl sulphonate, polyethoxylated octadecyl alcohol, turkey red oil and sodium salt of sulphochlorinated paraffins. The process can also be applied using other monomers such as ethyl acrylate, vinyl pivalate, vinyl chloride, methacrylic acid, acrylamide and N-methylolmethacrylamide; and with other catalysts, e.g. hydrogen peroxide, ammonium persulphate, benzoyl peroxide and dialkyl percarbonates.
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公开(公告)号：FR1466640A
公开(公告)日：1967-01-20
申请号：FR44468
申请日：1965-12-31
Applicant: BASF AG
Inventor： HERRLE KARL , BAUMANN KARL HEINZ , BECKMANN WILHELM , HEIL EDUARD
Abstract: A process for the continuous emulsion polymerization of conventional olefinically unsaturated monomers which are practically insoluble or at most partly soluble in water, in aqueous medium in the presence of conventional polymerization catalysts, comprises continuous supplying monomers exclusively in the form of a preformed aqueous emulsion through a tube in an upward flow at a flow velocity of 5 to 100 cm. per sec. to the lower part of a vertically arranged circulation system, blending with an excess of polymer dispersion which has already formed, and polymerizing in the circulation system without the use of mechanical stirrers to a mean conversion of more than 75%, the polymer dispersion being withdrawn at a point not higher than the point of entry of the monomer emulsion into the circulation system and at the same rate as the monomer emulsion is supplied. Optional process features include preblending of monomer with polymer, a temperature difference between ascending and descending parts, bubbling inert gas through the ascending part, boiling the ascending dispersion with the aid of reduced pressure, and complex circulation systems. In examples, monomers polymerized are: (1) butyl acrylate-acrylic acid, (2) and (3) methyl methacrylate in the presence of dispersed polymethyl methacrylate, (4) and (5) butyl acrylate-vinyl acetate-acrylic acid, (6) and (7) vinyl propionate-sodium vinyl sulphonate, (8) styrene-acrylic acid-acrylonitrile, (9) vinylidene chloride-acrylonitrile-methacrylamide and (10) butyl acrylate-vinyl acetate-sodium vinyl sulphonate-acrylic acid; the catalyst being potassium persulphate or azodiisobutyronitrile and the emulsifier being selected from dodecylbenzene sulphonate, C10-C16-alkyl sulphonate, polyethoxylated octadecyl alcohol, turkey red oil and sodium salt of sulphochlorinated paraffins. The process can also be applied using other monomers such as ethyl acrylate, vinyl pivalate, vinyl chloride, methacrylic acid, acrylamide and N-methylolmethacrylamide; and with other catalysts, e.g. hydrogen peroxide, ammonium persulphate, benzoyl peroxide and dialkyl percarbonates.
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