Process for the preparation of polyterephthaloyl-and polydiphenyl
ether-4,4-dicarboxylic acid oxalamidrazone
    1.
    发明授权
    Process for the preparation of polyterephthaloyl-and polydiphenyl ether-4,4-dicarboxylic acid oxalamidrazone 失效
    聚对苯二酰基和聚二苯醚-4,4-二羧酸草酰肼的制备方法

    公开(公告)号:US4208509A

    公开(公告)日:1980-06-17

    申请号:US871135

    申请日:1978-01-20

    CPC分类号: C08G69/28

    摘要: A process for the production of high molecular weight, fiber- and film-trimming polyterephthaloyl oxalamidrazone and polydiphenylether-4,4'-dicarboxylic acid oxalamidrazone where a solution of pure terephtaloyl chloride or diphenyl-ether-4,4'-dicarboxylic acid dichloride in an inert solvent free from amines and water is slowly added, at a temperature between 10.degree. C. and 35.degree. C., to a solution of pure oxalic acid bisamidrazone in dimethyl acetamide and/or N-methyl pyrrolidone, free from amines and water, containing 4 to 6 percent by weight of anhydrous lithium chloride, the total quantity of the solvents used amounting to 1.25 to 3.30 liters per mole of oxalic acid bisamidrazone.

    摘要翻译: 一种制备高分子量,纤维和膜修剪聚对苯二甲酰草酰腙和聚二苯醚-4,4'-二羧酸草酰肼的方法,其中将纯对苯二甲酰氯或二苯基醚-4,4'-二羧酸二氯化物的溶液 在10℃至35℃的温度下,将不含胺和水的惰性溶剂缓慢加入到纯草酸二氨基腙在二甲基乙酰胺和/或N-甲基吡咯烷酮中的溶液,其不含胺和水 ,含有4〜6重量%的无水氯化锂,所使用的溶剂的总量为每摩尔草酸二氨基腙1.25-3.30升。

    Polycarbonate-polyether-copolymer membrane
    4.
    发明授权
    Polycarbonate-polyether-copolymer membrane 失效
    聚碳酸酯 - 聚醚共聚物膜

    公开(公告)号:US4686044A

    公开(公告)日:1987-08-11

    申请号:US807766

    申请日:1985-12-09

    摘要: A method is provided for producing a membrane from polycarbonate-polyether-blockcopolymers with about 5 to 35 weight percent of repeating alkyleneethercarbonate units and about 95 to 65 weight percent of repeating bisphenol A-carbonate units, wherein the polyethyleneoxide blocks have a molecular weight from about 1,000 to 20,000, wherein the intrinsic viscosity of the copolymer is from about 180 to 300 ml/g as measured in chloroform at 25.degree. C. and wherein the ultrafiltration rate is from about 4 to 200 ml/h.m.sup.2.mm Hg. In a first dissolving step a polycarbonate-polyether-copolymer is homogeneously mixed with a solvent at a temperature from about 80.degree. to 120.degree. C. and in a second dissolving step the temperature is brought to about 140.degree. to 180.degree. C. to produce a true solution. The filtered solution is cooled to from about 20.degree. to 50.degree. C. and is then extruded through a nozzle into a bath comprising a nonsolvent for the polymer for precipitating the polymer. The precipitated polymer is then washed and dried. The resulting membranes improve the processes of hemodialyzing and of homofiltration.

    摘要翻译: 提供了一种从聚碳酸酯 - 聚醚 - 嵌段共聚物制备膜的方法,其中约5至35重量%的重复亚烷基醚碳酸酯单元和约95至65重量%的重复双酚A-碳酸酯单元,其中聚环氧乙烷嵌段的分子量约为 1,000至20,000,其中在25℃下在氯仿中测量的共聚物的特性粘度为约180至300ml / g,并且其中超滤速率为约4至200ml / h.m2.mmHg。 在第一溶解步骤中,聚碳酸酯 - 聚醚共聚物在约80-120℃的温度下与溶剂均匀混合,在第二溶解步骤中,将温度升至约140℃至180℃,以产生 一个真正的解决方案。 将过滤的溶液冷却至约20℃至50℃,然后通过喷嘴挤出至包含用于沉淀聚合物的聚合物的非溶剂的浴中。 然后将沉淀的聚合物洗涤并干燥。 所得的膜改善了血液透析和均质过程的过程。

    Oxygen bleaching of cotton linters by disproportionation of hydrogen
peroxide
    6.
    发明授权
    Oxygen bleaching of cotton linters by disproportionation of hydrogen peroxide 失效
    通过歧化过氧化氢对棉花绒的氧漂白

    公开(公告)号:US5322647A

    公开(公告)日:1994-06-21

    申请号:US790358

    申请日:1991-11-12

    IPC分类号: D06L3/02 D21C9/16 D21C9/147

    CPC分类号: D06L3/023 D06L3/021 D21C9/16

    摘要: In a process for chlorine-free bleaching of cellulose with an .alpha.-cellulose content of more than 90%, preferably from boiled cotton linters, more than 75% whiteness is achieved in a single-stage process using oxygen. The bleaching is conducted using the oxygen obtained by disproportionation of peroxo compounds in the pH range from 6 to 13 and with the bleaching time, depending on the bleaching temperature of 35.degree. C. to 15.degree. C., being between 15 and 150 minutes.

    摘要翻译: 在α-纤维素含量大于90%,优选来自煮熟棉绒的纤维素的无氯漂白的方法中,在使用氧的单阶段方法中实现了大于75%的白度。 使用通过歧化6至13的过氧化合物获得的氧气和漂白时间(取决于35℃至15℃的漂白温度)在15至150分钟之间进行漂白。

    Method for purifying silicone oil
    7.
    发明授权
    Method for purifying silicone oil 失效
    硅油净化方法

    公开(公告)号:US4661612A

    公开(公告)日:1987-04-28

    申请号:US797649

    申请日:1985-11-13

    IPC分类号: C08G77/34 H01B3/46 C07F7/08

    CPC分类号: C08G77/34 H01B3/465

    摘要: A method for purifying silicone oil used particularly as a cooling and/or insulation agent in electrical high voltage devices. The silicone oil is purified by the addition of drying agents, e.g. molecular sieves, and adsorption agents, e.g. activated carbon, and by mechanically moving the mixture. After subsequent sedimentation, filtration and degasification, purified silicone oil is obtained which can again be used as a coolant and/or insulating agent.

    摘要翻译: 一种在电气高压设备中特别用作冷却和/或绝缘剂的硅油的净化方法。 硅油通过加入干燥剂,例如, 分子筛和吸附剂,例如。 活性炭,并通过机械移动混合物。 在随后的沉淀,过滤和脱气之后,获得纯化的硅油,其可再次用作冷却剂和/或绝缘剂。

    Process for preparing polycarbonate-polyether-blockcopolymers
    9.
    发明授权
    Process for preparing polycarbonate-polyether-blockcopolymers 失效
    制备聚碳酸酯 - 聚醚 - 嵌段共聚物的方法

    公开(公告)号:US4436839A

    公开(公告)日:1984-03-13

    申请号:US177463

    申请日:1980-08-11

    摘要: A method for production of polycarbonate-polyether-blockcopolymers is provided. One or more solutions comprising bisphenol A and polyalkyleneglycol and a phosgene solution are added to a cooled initial reaction medium in a cooled reaction chamber in such a way that the phosgene contacts substantially the reaction partners from the one or more cooled solutions after they have spread in the reaction medium. Preferably the phosgene solution and the one or more solutions are added through tubes ending above the liquid level of the reaction medium such that the solutions added contact only within the stirred reaction mixture the reaction partner. The phosgene is employed in an excess of less than about 10 weight percent of the stochiometrically required weight amount relative to bisphenol A and polyalkyleneglycol. The polymer is useful in the production of membranes for dialysis, ultrafiltration and reverse osmosis.

    摘要翻译: 提供了一种生产聚碳酸酯 - 聚醚 - 嵌段共聚物的方法。 将一种或多种包含双酚A和聚亚烷基二醇和光气溶液的溶液在冷却的反应室中加入到冷却的初始反应介质中,使得光气在它们已经扩散之后基本上与一种或多种冷却溶液接触的反应配合物接触 反应介质。 优选地,将光气溶液和一种或多种溶液通过终止于反应介质的液面以上的管加入,使得加入的溶液仅在反应混合物中与反应配对物接触。 相对于双酚A和聚亚烷基二醇,光气的使用量超过小于约10重量%。 该聚合物可用于生产用于透析,超滤和反渗透的膜。