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    Process for the production of dimethyl ether useful as a propellant
    2.
    发明授权
    Process for the production of dimethyl ether useful as a propellant 失效
    生产可用作推进剂的二甲醚的方法

    公开(公告)号：US4560807A

    公开(公告)日：1985-12-24

    申请号：US604943

    申请日：1984-04-27

    申请人： Nobuyuki Murai ,  Kazuya Nakamichi ,  Masayuki Otake ,  Takashi Ushikubo

    发明人： Nobuyuki Murai ,  Kazuya Nakamichi ,  Masayuki Otake ,  Takashi Ushikubo

    IPC分类号： C07C43/04 ,  B01J21/00 ,  C07B61/00 ,  C07C41/00 ,  C07C41/09 ,  C07C41/42 ,  C07C67/00 ,  C09K3/30

    CPC分类号： C07C41/42 ,  C07C41/09 ,  C09K3/30 ,  Y02P20/582 ,  Y10S203/20

    摘要： A process for producing dimethyl ether useful as a propellant by dehydrating methanol and recovering dimethyl ether from the dehydrated product by distillation, which comprises(A) a reaction step wherein the dehydration reaction of methanol is conducted in a vapor phase under pressure of from 2 to 50 kg/cm.sup.2 G in the presence of a solid acid catalyst,(B) a first distillation step wherein the reaction mixture formed by the above reaction step is cooled and introduced into a pressurized distillation column under pressure of at least 5 kg/cm.sup.2 G; refined dimethyl ether is obtained as a side stream; substance having a boiling point lower than that of dimethyl ether is distilled from the top; and the bottom is withdrawn, and(C) a second distillation step wherein said bottom is introduced into a second distillation column under pressure lower than the pressure of the pressurized distillation column; unreacted methanol is recovered as a side stream from the second distillation column; substance having a boiling point lower than that of methanol is distilled from the top; and the bottom is withdrawn, whereby(D) the unreacted methanol recovered from the second distillation step is recycled to the reaction step.

    摘要翻译： 一种通过蒸馏除去甲醇和从脱水产物中回收二甲醚用作推进剂的二甲醚的方法，其包括（A）反应步骤，其中甲醇的脱水反应在压力为2〜 50kg / cm2G，（B）第一蒸馏步骤，其中由上述反应步骤形成的反应混合物冷却并在至少5kg / cm2G的压力下引入加压蒸馏塔; 得到精制二甲醚作为副产物; 沸点低于二甲醚的物质从顶部蒸馏出来; 和（C）第二蒸馏步骤，其中所述底部在低于加压蒸馏塔的压力的压力下引入第二蒸馏塔; 作为来自第二蒸馏塔的副产物流回收未反应的甲醇; 沸点低于甲醇的物质从顶部蒸馏出来; 并且将塔底取出，由此（D）将从第二蒸馏步骤回收的未反应甲醇再循环至反应步骤。

    Preparation of antitumor agent from shellfish
    6.
    发明授权
    Preparation of antitumor agent from shellfish 失效
    从贝类制备抗肿瘤剂

    公开(公告)号：US4390468A

    公开(公告)日：1983-06-28

    申请号：US404971

    申请日：1982-08-04

    申请人： Takuma Sasaki ,  Kazuya Nakamichi

    发明人： Takuma Sasaki ,  Kazuya Nakamichi

    IPC分类号： A23J1/04 ,  A61K38/00 ,  C07K14/435 ,  C07G7/00

    CPC分类号： A23J1/04 ,  C07K14/435 ,  A61K38/00 ,  Y10S530/857

    摘要： A new antitumor agent is provided which consists essentially of water-soluble, macromolecular glycoprotein substances having a range of molecular weights within the limits of from 10,000 to 300,000 and which is prepared from shellfish or mollusc by taking up the liquid portion which comes from the cooking of raw shellfish in an aqueous solvent, typically water or a saline solution, or vapor of such solvent and which is to be discarded as waste, concentrating the liquid portion to a smaller volume or to dryness, dissolving the resulting concentrate or dry powder in an aqueous solvent and isolating the desired water-soluble, macromolecular glycoprotein substances therefrom. The isolation of the desired substances is preferably carried out by an ion-exchange chromatography with a basic anion-exchanger followed by a gel-filtration.

    摘要翻译： 提供了一种新的抗肿瘤剂，其基本上由水溶性大分子糖蛋白物质组成，其分子量范围在10,000至300,000的范围内，并且由贝类或软体动物通过吸收来自烹饪的液体部分 生物贝类在水性溶剂中，通常为水或盐水溶液，或这种溶剂的蒸气，并以废物的形式被丢弃，将液体部分浓缩至较小体积或干燥，将所得浓缩物或干粉溶解在 水溶剂并从其中分离出所需的水溶性大分子糖蛋白物质。 所需物质的分离优选通过具有碱性阴离子交换剂的离子交换色谱法进行，然后进行凝胶过滤。