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    Continuous production of expandable thermoplastics
    2.
    发明授权
    Continuous production of expandable thermoplastics 失效
    连续生产可膨胀热塑性弹性体

    公开(公告)号：US3676378A

    公开(公告)日：1972-07-11

    申请号：US3676378D

    申请日：1970-03-25

    Applicant: BASF AG

    Inventor： HEIL EDUARD ,  TRIESCHMANN HANS-GEORG ,  WILLERSINN HERBERT ,  BOLTE HERBERT ,  BRONSTERT KLAUS

    IPC: B29C44/34 ,  C08J9/16 ,  C08F47/10 ,  C08F33/02

    CPC classification number: B29C44/461 ,  B29C44/3442 ,  C08J9/16

    Abstract: Continuous production of styrene polymers which contain an expanding agent and which are in the form of granules by extrusion of a mixture of a melt of the polymer with the expanding agent and rapid cooling of the extruded mixture, wherein excess expanding agent is first mixed with the melt and then the excess of expanding agent is evaporated. In this way both the production of a homogeneous mixture and the cooling of the mixture prior to extrusion to temperatures just above the softening point of the mixture are facilitated.

    Abstract translation: 连续生产含有发泡剂的苯乙烯聚合物，并且通过将聚合物的熔体与发泡剂的混合物挤出并挤出混合物的快速冷却而形成颗粒形式，其中过量的膨胀剂首先与 熔化，然后蒸发过量的发泡剂。 以这种方式，促进均匀混合物的生产和在挤出之前将混合物冷却至刚好高于混合物的软化点的温度。

    Removing heat of reaction in copolymerization of ethylene in aqueous dispersion
    3.
    发明授权
    Removing heat of reaction in copolymerization of ethylene in aqueous dispersion 失效
    去除水分散体中乙烯共聚反应的热量

    公开(公告)号：US3891603A

    公开(公告)日：1975-06-24

    申请号：US42909073

    申请日：1973-12-28

    Applicant: BASF AG

    Inventor： HEIL EDUARD ,  KUCHNER KARL ,  SLIWKA WOLFGANG ,  SMITS HARALD

    IPC: B01J19/00 ,  C08F10/00 ,  C08F1/11 ,  C08F1/98

    CPC classification number: B01J19/0013 ,  B01J2219/00103 ,  B01J2219/00108 ,  C08F10/00 ,  C08F4/28

    Abstract: Copolymers of ethylene with 10 to 98 percent by weight of conventional comonomers are made by copolymerization in aqueous dispersion, at least a part of the heat of polymerization being removed by evaporation of the ethylene. The vapors are cooled by a cooling medium by heat exchange, in a cooling zone situated above the polymerization vessel and communicating with the latter, the hot vapors being fed to the upper end of the cooling zone, the cooled vapors returning to the polymerization vessel, so that the vapors are cooled by the cooling medium while they are flowing downward.

    Abstract translation: 通过在水分散体中共聚制备乙烯与10至98重量％的常规共聚单体的共聚物，通过乙烯蒸发除去至少一部分聚合热。 蒸汽通过热交换由冷却介质冷却，在位于聚合容器上方的冷却区中并与其连通，热蒸汽被供给到冷却区的上端，冷却的蒸气返回聚合容器， 使得蒸汽在冷却介质向下流动时被冷却。

    CONTINUOUS MANUFACTURE OF POLYESTERS
    6.
    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.

    Production of water-soluble polymers in solid form
    8.
    发明专利
    Production of water-soluble polymers in solid form 未知

    公开(公告)号：GB1114161A

    公开(公告)日：1968-05-15

    申请号：GB3765565

    申请日：1965-09-03

    Applicant: BASF AG

    Inventor： SPOOR HERBERT ,  POHLEMANN HEINZ ,  HEIL EDUARD ,  MUENSTER ALFRED ,  PFAFF PETER

    IPC: C08J3/14

    Abstract: A process for recovering water-soluble polymers in solid form from their highly viscous aqueous solutions comprises breaking up an aqueous solution of the polymer having a viscosity of at least 105 centipoises into small particles, introducing the latter into an organic liquid, which is substantially water-immiscible, to form a suspension of the polymer in the organic liquid, dehydrating the suspension by azeotropic distillation, and separating the suspended polymer particles from the organic liquid. Suitable organic liquids include heptane, carbon tetrachloride, tetrachloroethylene, amyl acetate, dibutyl ether, benzene, toluene, xylene and mixtures thereof. Suitable polymers include those of acrylamide, methacrylamide, acrylic acid, methacrylic acid, N-vinyl pyrrolidone, vinyl sulphonic acid, styrene sulphonic acid and N-vinyl imidazole, which compounds may possibly be copolymerized with, for example, acrylonitrile, methyl acrylate, vinyl acetate, vinyl chloride and, also, small amounts of crosslinking monomers. An example illustrates the recovery of an acrylamide/ammonium acrylate copolymer prepared by polymerizing the corresponding monomers in aqueous solution using an ammonium persulphate / sodium formaldehyde sulphoxylate catalyst.

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