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37 条记录 (耗时 0.017 秒)

    Process for the removal of selenium compounds from urethane solutions
    1.
    发明授权
    Process for the removal of selenium compounds from urethane solutions 失效
    从氨基甲酸酯溶液中除去硒化合物的方法

    公开(公告)号：US4055629A

    公开(公告)日：1977-10-25

    申请号：US750109

    申请日：1976-12-13

    申请人： Rudolph Rosenthal ,  Edward T. Shawl

    发明人： Rudolph Rosenthal ,  Edward T. Shawl

    IPC分类号： C01B19/00 ,  C01G3/02

    CPC分类号： C01G3/02 ,  C01B19/00

    摘要： A process for the recovery of selenium from a urethane solution containing selenium compounds which comprises contacting the selenium-containing urethane solution at a suitable temperature with copper (I) chloride, oxygen or an oxygen-containing gas such as air, and a complexing solvent such as an amine or nitrile to form an insoluble precipitate of copper-selenium compounds or complexes. The selenium and copper may be recovered from the resulting precipitate in a form suitable for reuse in the preparation of urethanes and selenium removal respectively.

    摘要翻译： 一种从含有硒化合物的氨基甲酸酯溶液中回收硒的方法，其包括使合适的温度下的含硒氨基甲酸酯溶液与氯化铜（I），氧气或含氧气体如空气接触，以及络合溶剂如 作为胺或腈形成铜 - 硒化合物或络合物的不溶性沉淀物。 可以从生成的沉淀物中回收硒和铜，其形式适合分别用于制备氨基甲酸酯和除去硒。

    Cement additives
    4.
    发明授权
    Cement additives 失效
    水泥添加剂

    公开(公告)号：US5614017A

    公开(公告)日：1997-03-25

    申请号：US621669

    申请日：1996-03-26

    申请人： Edward T. Shawl

    发明人： Edward T. Shawl

    IPC分类号： C04B24/26 ,  C04B24/32 ,  C08F8/14 ,  C04B24/24

    CPC分类号： C04B24/2647 ,  C04B24/267 ,  C08F8/14 ,  C08G81/025 ,  C04B2103/302 ,  C04B2103/32

    摘要： Substances useful as water reducing and superplasticizer additives for cement compositions are formed by reaction of carboxylic acid polymers with polyethers of C.sub.2 -C.sub.4 epoxides wherein partial cleavage of the polyether and esterification of the polyether and the cleavage products thereof by the other reactant are achieved. In one embodiment, a sulfonic acid is used to catalyze the reaction of poly(acrylic acid) and a monofunctional ethylene oxide-propylene oxide copolymer at a temperature in excess of 140.degree. C.

    摘要翻译： 用作水泥组合物的减水剂和超增塑剂添加剂的物质是通过羧酸聚合物与C 2 -C 4环氧化物的聚醚的反应形成的，其中聚醚的部分裂解和聚醚的酯化以及其它反应物的裂解产物。 在一个实施方案中，磺酸用于在超过140℃的温度下催化聚（丙烯酸）和单官能环氧乙烷 - 环氧丙烷共聚物的反应。

    Selective process for the preparation of diphenylmethane bis-(dialkyl ureas
    5.
    发明授权
    Selective process for the preparation of diphenylmethane bis-(dialkyl ureas 失效
    二苯基甲烷双 - （二烷基脲）的制备方法

    公开(公告)号：US5220061A

    公开(公告)日：1993-06-15

    申请号：US963167

    申请日：1992-10-19

    申请人： Carmen L. Rodriguez ,  Edward T. Shawl ,  Haven S. Kesling, Jr.

    发明人： Carmen L. Rodriguez ,  Edward T. Shawl ,  Haven S. Kesling, Jr.

    IPC分类号： C07C263/04 ,  C07C269/06 ,  C07C273/18

    CPC分类号： C07C273/1854

    摘要： A selective process for the preparation of diphenylmethane bis(dialkylureas) is disclosed. An alkyl phenylcarbamate or an N,N-dialkyl-N'-phenylurea is reacted with a methylene bis(alkyl carbamate) in the presence of an acid catalyst. The use of a staged addition of phenylcarbamate or phenylurea to the methylene bis(carbamate) and the use of a ramped temperature program are the keys to good selectivity to MDI dimer products.

    摘要翻译： 公开了制备二苯基甲烷双（二烷基脲）的选择性方法。 在酸催化剂存在下，将烷基苯基氨基甲酸酯或N，N-二烷基-N'-苯基脲与亚甲基双（烷基氨基甲酸酯）反应。 使用分段加成苯基氨基甲酸酯或苯脲至亚甲基双（氨基甲酸酯）和使用斜坡温度程序是对MDI二聚体产物具有良好选择性的关键。

    Process for preparing comb-branched polymers
    6.
    发明授权
    Process for preparing comb-branched polymers 失效
    制备梳状支化聚合物的方法

    公开(公告)号：US06815513B2

    公开(公告)日：2004-11-09

    申请号：US09760931

    申请日：2001-01-16

    申请人： Bi Le-Khac ,  Wei Wang ,  Edward T. Shawl

    发明人： Bi Le-Khac ,  Wei Wang ,  Edward T. Shawl

    IPC分类号： C08F400

    CPC分类号： C08F2/06 ,  C08F290/062

    摘要： A continuous process for making a comb-branched copolymer of an acrylic monomer and a polyether macromonomer is disclosed. The process is performed by continuously feeding a reaction zone with a monomer stream that contains an acrylic acid and a polyether macromonomer, and an initiator stream. The comb-branched copolymer made thereby performs better as water reducing agent in cement compared to that made by a batch process.

    摘要翻译： 公开了制备丙烯酸单体和聚醚大分子单体的梳状支化共聚物的连续方法。 该方法通过使含有丙烯酸和聚醚大分子单体的流体和引发剂流连续地供给反应区来进行。 由此制成的梳状支化共聚物与通过间歇法制备的水泥中的减水剂相比表现更好。

    Process for preparing comb-branched polymers
    7.
    发明授权
    Process for preparing comb-branched polymers 有权

    公开(公告)号：US06214958B1

    公开(公告)日：2001-04-10

    申请号：US09358009

    申请日：1999-07-21

    申请人： Bi Le-Khac ,  Wei Wang ,  Edward T. Shawl

    发明人： Bi Le-Khac ,  Wei Wang ,  Edward T. Shawl

    IPC分类号： C08F22064

    CPC分类号： C08F2/06 ,  C08F290/062

    摘要： A continuous process for making a comb-branched copolymer of an acrylic monomer and a polyether macromonomer is disclosed. The process is performed by continuously feeding a reaction zone with a monomer stream that contains an acrylic acid and a polyether macromonomer, and an initiator stream. The comb-branched copolymer made thereby performs better as water reducing agent in cement compared to that made by a batch process.

    Process for the preparation of aromatic mono- and polyisocyanates
    8.
    发明授权
    Process for the preparation of aromatic mono- and polyisocyanates 失效
    制备芳族单和多异氰酸酯的方法

    公开(公告)号：US4871871A

    公开(公告)日：1989-10-03

    申请号：US266607

    申请日：1988-11-03

    申请人： Edward T. Shawl ,  Haven S. Kesling, Jr.

    发明人： Edward T. Shawl ,  Haven S. Kesling, Jr.

    IPC分类号： C07C263/06

    CPC分类号： C07C263/06

    摘要： An improved process is provided for the preparation of aromatic mono- and poly- isocyanates by the thermal decomposition of an aromatic bis dialkyl urea in solvent in the presence of a tertiary amine hydrohalide, such as pyridine hydrochloride, as a promoter for conversion of the urea groups to isocyanates.

    摘要翻译： 提供了一种通过在叔胺氢卤酸盐如吡啶盐酸盐存在下在溶剂中热分解芳族单 - 和多 - 异氰酸酯作为尿素转化促进剂的方法的改进方法 异氰酸酯基团。

    Preparation of diphenylmethane dicarbamates and polymethylene polyphenyl carbamates with Lewis acid catalysts intercalated in graphite
    9.
    发明授权
    Preparation of diphenylmethane dicarbamates and polymethylene polyphenyl carbamates with Lewis acid catalysts intercalated in graphite 失效
    用石墨插入路易斯酸催化剂制备二苯基甲烷二氨基甲酸酯和聚亚甲基多苯基氨基甲酸酯

    公开(公告)号：US4202986A

    公开(公告)日：1980-05-13

    申请号：US011300

    申请日：1979-02-12

    申请人： Edward T. Shawl

    发明人： Edward T. Shawl

    IPC分类号： C07B61/00 ,  B01J27/00 ,  B01J27/08 ,  C07C67/00 ,  C07C239/00 ,  C07C269/00 ,  C07C125/04

    CPC分类号： B01J27/08

    摘要： Diphenylmethane dicarbamates and polymethylene polyphenyl carbamate homologs and derivatives of these compounds are produced by the condensation of N-aryl carbamic acid esters, such as ethylphenylcarbamate, with a carbonyl compound selected from formaldehyde, para-formaldehyde or trioxane at a temperature of between about ambient and 170.degree. C. in the presence of a Lewis acid intercalated in graphite and optionally in the presence of an inert solvent.

    摘要翻译： 二苯基甲烷二氨基甲酸酯和这些化合物的多亚甲基多苯基氨基甲酸酯同系物和衍生物通过N-芳基氨基甲酸酯如乙基苯基氨基甲酸酯与选自甲醛，对甲醛或三恶烷的羰基化合物在约环境温度和 在石墨中嵌入的路易斯酸和任选在惰性溶剂存在下存在下进行。