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    High-extraction chrome tanning process
    81.
    发明授权
    High-extraction chrome tanning process 失效
    高萃取铬鞣制工艺

    公开(公告)号：US4919680A

    公开(公告)日：1990-04-24

    申请号：US231233

    申请日：1988-08-11

    Applicant: Bernhard Wehling ,  Bernd Makowka ,  Heinz-Gunter Klein, deceased ,  Gertrud Klein, heir ,  Helga Rosentreter

    Inventor： Bernhard Wehling ,  Bernd Makowka ,  Heinz-Gunter Klein, deceased ,  Gertrud Klein, heir ,  Helga Rosentreter

    IPC: C14C1/08 ,  C14C3/06

    CPC classification number: C14C3/06

    Abstract: Crome tanning of pickled animal hides with a tanning agent comprising a reaction product of a basic chromium (III) sulfate and aliphatic C.sub.4 -C.sub.6 dicarboxylic acids or their salts is improved by preparing the reaction product in an aqueous solution from basic chromium (III) sulfate and 0.2 to 0.8 mol of the aliphatic dicarboxylic acids per mol chromium oxide of the basic chromium sulfate with subsequent adjustment of the theoretical basicity to 0 to 50% with alkali metal hydroxide or carbonate, the reaction product being added to a hide pickling liquor in the form of an aqueous solution having a chromium oxide content of at least 5% or in powder form in a quantity of 0.9 to 1.5% chromium oxide, based on hide weight, with a liquor volume less than 100%, based on hide weight, the final pH value being above 4.0 and the final temperature above 40.degree. C.

    Abstract translation: 通过在碱性硫酸铬（III）的水溶液中制备反应产物，可以改善含有硫酸碱式硫酸铬（III）和脂族C 4 -C 6二羧酸或其盐的反应产物的鞣制动物鞣制腌制动物皮革 和0.2至0.8摩尔的脂肪族二羧酸/碱式硫酸铬的每摩尔铬氧化物，随后用碱金属氢氧化物或碳酸盐将理论碱度调节至0至50％，将反应产物加入到 形式的氧化铬含量为至少5％或粉末形式的0.9至1.5％的氧化铬，基于皮重，液体体积小于100％，基于皮重， 最终pH值高于4.0，最终温度高于40℃。

    Plasticating apparatus for molding devices
    82.
    发明授权
    Plasticating apparatus for molding devices 失效
    成型装置用塑化装置

    公开(公告)号：US4290702A

    公开(公告)日：1981-09-22

    申请号：US104094

    申请日：1979-12-17

    Applicant: Reuben Klein ,  Imrich Klein

    Inventor： Reuben Klein ,  Imrich Klein

    IPC: B29C45/50 ,  B29C48/395 ,  B29B1/06

    CPC classification number: B29C45/5092 ,  B29C45/50 ,  B29C47/38 ,  B29C47/6006 ,  B29C47/0009

    Abstract: A plasticating apparatus operates continuously to plasticate material which is delivered intermittently to a molding device, the plasticating apparatus including a first screw conveyor which rotates in a barrel, a backfeed passage within the first screw conveyor and a second screw conveyor in the backfeed passage arranged to recirculate material in a circuit extending back through the backfeed passage. The first screw conveyor reciprocates axially so that during periods of non-delivery of plasticated material, the capacity of the circuit is increased to accommodate the accumulation of added plasticated material generated by the continuous rotation of the first screw conveyor.

    Abstract translation: 塑化装置连续操作以将间歇地输送到模制装置的材料塑化，该塑化装置包括在筒体内旋转的第一螺旋输送机，第一螺旋输送机内的反向进料通道，以及反馈通道中的第二螺旋输送机， 在延伸回反馈通道的回路中循环材料。 第一螺旋输送机轴向往复运动，使得在不递送塑化材料的时段期间，电路的容量增加以适应由第一螺旋输送机的连续旋转产生的所加入的塑化材料的累积。

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