Process for the preparation of anion exchange resins of the
poly(meth)acrylamide type
    1.
    发明授权
    Process for the preparation of anion exchange resins of the poly(meth)acrylamide type 失效
    制备聚(甲基)丙烯酰胺型阴离子交换树脂的方法

    公开(公告)号:US5414020A

    公开(公告)日:1995-05-09

    申请号:US160453

    申请日:1993-12-01

    CPC分类号: B01J41/14 C08F8/32

    摘要: According to the process according to the invention for the preparation of anion exchange resins of the poly(meth)acrylamide type by aminolysis of bead polymers of cross-linked poly(meth)acrylic acid esters with excess polyamine, subsequent separation of the anion exchange resins from the liquid phase containing the unreacted polyamine, washing the anion exchangers free of amine with water and recovering the polyamines from the washing waters, the liquid phase containing the unreacted polyamine and the polyamine-containing washing waters are immediately mixed with the bead polymer of cross-linked poly(meth)acrylic acid ester to be subjected to aminolysis, the amount of fresh polyamine necessary for the establishment of the desired polyamine excess is added to the mixture, the mixture thus obtained is distillatively dewatered until its water content has fallen to a value of

    摘要翻译: 根据本发明的制备聚(甲基)丙烯酰胺型阴离子交换树脂的方法,通过交联聚(甲基)丙烯酸酯与多余多胺的珠粒聚合物的分解,随后分离阴离子交换树脂 从含有未反应的多胺的液相中,用水洗涤不含胺的阴离子交换剂并从洗涤水中回收多胺,将含有未反应的多胺和含多胺洗涤水的液相立即与交叉的珠聚合物 连接的聚(甲基)丙烯酸酯进行氨解,将所需多胺过量所需的新鲜多胺的量加入混合物中,将得到的混合物进行蒸馏脱水,直到其含水量降至 值为<7重量%,并且在该蒸馏脱水后残留的混合物在该溶液中进行氨解 玛丽的样子

    Manufacturing method for hollow cast product with bottom
    7.
    发明授权
    Manufacturing method for hollow cast product with bottom 失效
    具有底部的中空铸造产品的制造方法

    公开(公告)号:US4785871A

    公开(公告)日:1988-11-22

    申请号:US112963

    申请日:1987-10-27

    CPC分类号: B22D15/04 B22D27/04

    摘要: A static casting method for a hollow cast product using a mold with bottom comprising a top lid, a core and an outer mold section, the core being attached to the top lid and disposed inside the outer mold section. The outer mold section includes a lateral mold section and a lower mold section. The lateral mold section is formed at its inner peripheral wall portion with a composite cooling section by stacking chiller blocks and interposing therebetween refractory sands and at its outer wall portion with refractory sands. Cooling pipes include first and second pipes. A first pipe extends longitudinally through the refractory sands at the outer wall portion and a second pipe extends longitudinally through the inner wall portion in contact with at least a part of each of the chiller blocks, the first and second pipes being connected at their lower portions through the bend portion. The chiller blocks are cooled by water flowing in the second pipes. The entire casting cavity is first filled with molten metal. Then cooling water is passed through the cooling pipes until solidification of the metal is complete. Thereafter the supply of water is stopped and water remaining in the pipes is discharged.

    摘要翻译: 一种用于中空铸造产品的静态铸造方法,其使用具有顶盖,芯部和外部模具部分的底部的模具,所述芯部附接到顶盖并且设置在外部模具部分内部。 外模具部分包括侧模部分和下模部分。 横向模具部分在其内周壁部分上形成有复合冷却部分,通过堆叠冷却器块并将其夹在耐火砂之间,并在其外壁部分处形成耐火砂。 冷却管道包括第一和第二管道。 第一管在外壁部分纵向延伸通过耐火砂,第二管纵向延伸穿过每个冷却块的至少一部分与内壁部分接触,第一和第二管在其下部连接 通过弯曲部分。 冷水机组由在第二管道中流动的水冷却。 整个铸造腔首先被熔融金属填充。 然后将冷却水通过冷却管直到金属的固化完成。 此后,停止供水并排出残留在管道中的水。

    Process for the preparation of 2-hydroxycarbazoles
    9.
    发明授权
    Process for the preparation of 2-hydroxycarbazoles 失效
    2-羟基咔唑的制备方法

    公开(公告)号:US4137238A

    公开(公告)日:1979-01-30

    申请号:US883980

    申请日:1978-03-06

    IPC分类号: C07D209/88

    CPC分类号: C07D209/88

    摘要: A process for the preparation of a 2-hydroxycarbazole of the formula ##STR1## wherein R.sup.1 represents hydrogen, halogen or an optionally substituted alkyl, aryl or alkoxy radicalWhich comprises contacting a diphenylamine of the formula ##STR2## wherein R.sup.1 has the above-described meaning andR.sup.2 represents halogenWith a base at an elevated temperature in water and/or an organic solvent or diluent.

    摘要翻译: (I)的2-羟基咔唑的方法,其中R 1表示氢,卤素或任选取代的烷基,芳基或烷氧基,其包含连接式(II)的二苯胺,其中 R1具有上述含义,R 2表示在水和/或有机溶剂或稀释液中的高温下的碱的卤素。

    Process for the preparation of pivaloylpyruvic acid esters
    10.
    发明授权
    Process for the preparation of pivaloylpyruvic acid esters 失效
    制备新戊酰丙酮酸酯的方法

    公开(公告)号:US4739104A

    公开(公告)日:1988-04-19

    申请号:US494675

    申请日:1983-05-13

    CPC分类号: C07C69/716

    摘要: An improved process for the preparation of pivaloylpyruyic acid ester by reaction of pinacolin with an oxalic acid dialkyl ester followed by neutralization of the reaction mixture is disclosed, wherein the reactants are mixed at a temperature of -50.degree. to +50.degree. C. and the reaction completed at a temperature of 35.degree. to 200.degree. C.

    摘要翻译: 公开了一种用于通过相互作用与正丁草腈与草酸二烷基酯的反应制备新戊酰丙酮酸酯并随后中和反应混合物的改进方法,其中反应物在-50℃至+ 50℃的温度下混合, 反应在35〜200℃的温度下完成