中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

26 records (took 0.028 seconds)

    Preparation of xylylenediamine
    11.
    发明授权
    Preparation of xylylenediamine 失效
    苯二甲胺的制备

    公开(公告)号：US4482741A

    公开(公告)日：1984-11-13

    申请号：US569367

    申请日：1984-01-09

    Applicant: Paul R. Kurek

    Inventor： Paul R. Kurek

    IPC: C07C209/48 ,  C07C85/12

    CPC classification number: C07C209/48

    Abstract: Xylylenediamines may be prepared by reducing the corresponding phthalonitrile with hydrogen in the presence of a catalyst comprising cobalt promoted with titanium composited on a solid support with the added presence of ammonia. By utilizing this particular catalyst with ammonia and a solvent comprising a xylylenediamine, it is possible to effect the reduction at temperatures in the range of from about 80.degree. to about 125.degree. C. and at a pressure not greater than 1000 psig. By utilizing various components of the system it is possible to attain yields of the desired product in excess of 90%.

    Abstract translation: 苯二甲胺可以通过在催化剂的存在下用氢还原相应的邻苯二甲腈来制备，所述催化剂包含用钛复合的催化剂，所述钛在固体载体上加入，同时加入氨的存在。 通过用氨和包含苯二甲胺的溶剂利用该特定的催化剂，可以在约80-约125℃的温度和不高于1000psig的压力下进行还原。 通过利用系统的各种组分，可以获得超过90％的所需产物的产率。

    Process for inhibiting the polymerization of vinyl aromatic compounds
    12.
    发明授权
    Process for inhibiting the polymerization of vinyl aromatic compounds 失效
    抑制乙烯基芳族化合物聚合的方法

    公开(公告)号：US06395943B1

    公开(公告)日：2002-05-28

    申请号：US09371455

    申请日：1999-08-10

    Applicant: Paul R. Kurek ,  Robert R. Frame

    Inventor： Paul R. Kurek ,  Robert R. Frame

    IPC: C07C720

    CPC classification number: C07B63/04 ,  C08F2/40

    Abstract: A process is disclosed for inhibiting the polymerization of vinyl aromatic compounds, such as styrene, during its distillation. The process involves adding a mixture of at least two inhibitors to the vinyl aromatic compound. One such combination is N,N′-di-2-butyl-N,N′,4-dinitroso-1,4-diaminobenzene and dinitrocresol. A stabilizer such as N,N′-di-2-butyl-1,4-diaminobenzene can also be added.

    Abstract translation: 公开了一种在蒸馏期间抑制乙烯基芳族化合物如苯乙烯的聚合的方法。 该方法包括向乙烯基芳族化合物中加入至少两种抑制剂的混合物。 一种这样的组合是N，N'-二-2-丁基-N，N'，4-二亚硝基1,4-二氨基苯和二硝基甲酚。 也可以加入N，N'-二-2-丁基-1,4-二氨基苯等稳定剂。

    Increasing the thermal stability of a vinyl aromatic polymerization inhibitor
    13.
    发明授权
    Increasing the thermal stability of a vinyl aromatic polymerization inhibitor 失效
    提高乙烯基芳族聚合抑制剂的热稳定性

    公开(公告)号：US06395942B1

    公开(公告)日：2002-05-28

    申请号：US09371349

    申请日：1999-08-10

    Applicant: Paul R. Kurek ,  Robert R. Frame

    Inventor： Paul R. Kurek ,  Robert R. Frame

    IPC: C07C720

    CPC classification number: C07C7/20 ,  C07C15/58 ,  C07C15/46 ,  C07C15/44

    Abstract: Compounds that inhibit polymerization of vinyl aromatic compounds need to operate at temperatures of about 90° C. to about 150° C. A process for increasing the thermal stability of inhibitors such as N,N′-di-2-butyl-N,N′-dinitroso-1,4-diaminobenzene is disclosed. The process comprises adding to the inhibitor a stabilizer such as N,N′-di-2-butyl-1,4-diaminobenzene. The mixture of inhibitor and stabilizer is also used to inhibit polymerization of vinyl aromatic compounds.

    Abstract translation: 抑制乙烯基芳族化合物聚合的化合物需要在约90℃至约150℃的温度下操作。提高抑制剂如N，N'-二-2-丁基-N，N 公开了'二亚硝基-1,4-二氨基苯。 该方法包括向抑制剂中加入稳定剂如N，N'-二-2-丁基-1,4-二氨基苯。 抑制剂和稳定剂的混合物也用于抑制乙烯基芳族化合物的聚合。

    Selective catalytic conversion of cyanohydrins to their corresponding aldehydes without concurrent amine formation
    15.
    发明授权
    Selective catalytic conversion of cyanohydrins to their corresponding aldehydes without concurrent amine formation 失效
    氰化氢选择性催化转化成其相应的醛，不同时形成胺

    公开(公告)号：US4970302A

    公开(公告)日：1990-11-13

    申请号：US344181

    申请日：1989-04-27

    Applicant: Blaise J. Arena ,  Paul R. Kurek

    Inventor： Blaise J. Arena ,  Paul R. Kurek

    IPC: C07H3/02

    CPC classification number: C07H3/02

    Abstract: There is described a method of selectively and continuously converting a cyanohydrin to its corresponding aldehyde using as a catalyst zerovalent palladium dispersed on an organic polymeric resin with a surface area above 30 m.sup.2 /g under highly acidic conditions where the formed imine is resistant to further reduction to the amine. Where the aqueous cyanohydrin feedstock contains more than 1.4 equivalent proportions of a strong acid, less than 5% of the theoretical yield of amine is formed. Hydrogenation may be performed at a pressure as great as 2000 psig without significant deleterious effects on selectivity. Hydrolysis of the hydrogenation product affords the corresponding aldehydes in good yields.

    Abstract translation: 描述了使用分散在表面积大于30m 2 / g的有机聚合物树脂上的催化剂零价钯选择性连续地将氰醇转化为其相应的醛的方法，其中所形成的亚胺耐受进一步还原 胺。 当氰醇水原料含有超过1.4当量比例的强酸时，形成少于理论产率的胺的5％。 氢化可以在高达2000psig的压力下进行，对选择性没有显着的有害影响。 氢化产物的水解得到相应的醛，产率良好。

    Reduction of C-nitrosoarylamines
    17.
    发明授权
    Reduction of C-nitrosoarylamines 失效
    还原C-亚硝基芳基胺

    公开(公告)号：US4448994A

    公开(公告)日：1984-05-15

    申请号：US533071

    申请日：1983-09-16

    Applicant: Paul R. Kurek

    Inventor： Paul R. Kurek

    IPC: C07C85/11

    CPC classification number: C07C209/38

    Abstract: Alkali metal salts of C-nitrosoarylamines may be readily reduced in aqueous solution by a reducing sugar. The reaction affords the corresponding aminoarylamine in good yield with little, if any, byproduct formation and affords a method of preparing aminoarylamines without isolation of the C-nitrosoarylamine.

    Abstract translation: C-亚硝基芳基胺的碱金属盐可以通过还原糖容易地在水溶液中还原。 该反应以很少的（如果有的话）副产物形成得到相当的氨基芳基胺，并且提供了在不分离C-亚硝基芳基胺的情况下制备氨基芳基胺的方法。

    Preparation of 2,6-di-tert-butyl-4-alkylphenols
    18.
    发明授权
    Preparation of 2,6-di-tert-butyl-4-alkylphenols 失效
    制备2,6-二叔丁基-4-烷基苯酚

    公开(公告)号：US4380677A

    公开(公告)日：1983-04-19

    申请号：US262366

    申请日：1981-05-11

    Applicant: Paul R. Kurek

    Inventor： Paul R. Kurek

    IPC: C07C37/14 ,  C07C39/06 ,  C07C37/11

    CPC classification number: C07C37/14

    Abstract: Alkylation of 4-alkylphenols with 2-methylpropene in the presence of a macroreticular cation exchange resin bearing sulfonic acid groups with an internal surface area greater than about 200 m.sup.2 /g and an average pore diameter less than about 120 Angstroms leads to the 2,6-dialkylated product in high yields. Using a resin with an internal surface area of from about 525 to about 575 m.sup.2 /g and an average pore diameter from about 40 to about 60 Angstroms, there can be prepared from 4-methylphenol the antioxidant 2,6-di-tert-butyl-4-methylphenol in a yield in excess of 90%.

    Abstract translation: 在具有大于约200m 2 / g的内表面积大于约200m 2 / g且平均孔径小于约120埃的磺酸基的大网络阳离子交换树脂存在下，用2-甲基丙烯烷基化4-烷基苯酚导致2,6 高产率的二烷基化产物。 使用内表面积为约525至约575m 2 / g，平均孔径为约40至约60埃的树脂，可由4-甲基苯酚制备抗氧化剂2,6-二叔丁基 -4-甲基苯酚，产率超过90％。

    Process for inhibiting the polymerization of vinyl aromatics
    19.
    发明授权
    Process for inhibiting the polymerization of vinyl aromatics 失效
    抑制乙烯基芳烃聚合的方法

    公开(公告)号：US5869717A

    公开(公告)日：1999-02-09

    申请号：US932202

    申请日：1997-09-17

    Applicant: Robert R. Frame ,  Paul R. Kurek

    Inventor： Robert R. Frame ,  Paul R. Kurek

    IPC: C07C7/20 ,  C07C15/46

    CPC classification number: C07C7/20 ,  Y10S585/952

    Abstract: Applicants have developed a process for inhibiting the polymerization of vinyl aromatic compound during the distillation of the vinyl aromatic compounds. The process involves adding to the vinyl aromatic compound, e.g., styrene, a nitroso compound such as N-nitroso-N, N'-di-3-pentyl-p-phenylenediamine.

    Abstract translation: 申请人开发了在乙烯基芳族化合物的蒸馏期间抑制乙烯基芳族化合物的聚合的方法。 该方法包括加入乙烯基芳族化合物，例如苯乙烯，亚硝基化合物如N-亚硝基-N，N'-二-3-戊基 - 对苯二胺。

    Oxidative removal of aqueous cyanide by manganese(IV)-containing oxides
    20.
    发明授权
    Oxidative removal of aqueous cyanide by manganese(IV)-containing oxides 失效
    通过含锰（IV）的氧化物氧化除去氰化水溶液

    公开(公告)号：US5705078A

    公开(公告)日：1998-01-06

    申请号：US707985

    申请日：1996-08-23

    Applicant: Paul R. Kurek ,  Tom N. Kalnes ,  Gregory John Lewis

    Inventor： Paul R. Kurek ,  Tom N. Kalnes ,  Gregory John Lewis

    IPC: C02F1/72 ,  C02F1/74 ,  C02F1/78

    CPC classification number: C02F1/74 ,  C02F1/725 ,  C02F1/722 ,  C02F1/78 ,  C02F2101/18 ,  Y10S210/904

    Abstract: Manganese(IV)-containing oxides are effective catalysts for oxidation of water-soluble cyanide over a wide pH range (0.5-12) and temperature (15.degree.-250.degree. C.). Oxygen is the preferred oxidizing agent at partial pressures between about 0.2 and 5 atmospheres (2.9-75 psi, 20-517 kPa). Electrolytically deposited MnO.sub.2 is one preferred form of the catalyst. Another preferred manganese(IV)-containing oxide is the group of cation-stabilized manganese(IV)-containing oxides illustrated by cryptomelane. Yet another preferred form of manganese(IV)-containing oxide is a group of crystalline manganese phosphate compositions having an extended network and an empirical composition on an anhydrous basis expressed by an empirical formula of: (A.sup.a+).sub.v (Mn.sup.b+)(M.sup.c+).sub.x P.sub.y O.sub.z where A is a templating agent selected from the group consisting of alkali metals, alkaline earth metals, hydronium ion, ammonium ion, organoammonium ions, and mixtures thereof, "a" represents a weighted average valence of A and varies from 1.0 to 2.0, "v" is the mole ratio of A to Mn and varies from about 0.1 to about 5, "b" is the average valence of Mn and has a value of greater than 3 to about 4, M is a metal selected from the group consisting of Al, Fe.sup.3+, Ca, Sn.sup.4+, Ti, Sb.sup.5+, and mixtures thereof, "x" is the mole ratio of M to Mn and varies from 0 to about 3.0, "c" is the weighted average valence of M and varies from about 1.0 to about 5.0, "y" is the mole ratio of P to Mn and varies from about 0.10 to about 5.0 and "z" is the mole ratio of O to Mn and has a value determined by the equation z=1/2(a.times.v+b+x.times.c+5.times.y).

    Abstract translation: 含有锰（IV）的氧化物是在宽pH范围（0.5-12）和温度（15-250℃）下氧化水溶性氰化物的有效催化剂。 在约0.2和5个大气压（2.9-75psi，20-517kPa）之间的分压下，氧气是优选的氧化剂。 电解沉积的MnO 2是催化剂的一种优选形式。 另一种优选的含有锰（Ⅳ）的氧化物是由赤藓烷所示的阳离子稳定化的含锰（Ⅳ）的氧化物。 另一种优选形式的含锰（IV）的氧化物是一组结晶磷酸锰组合物，其具有延伸的网络和无水基础上的经验组成，其经验式为：（Aa +）v（Mnb +）（Mc +）xPyOz A是选自碱金属，碱土金属，水合氢离子，铵离子，有机铵离子及其混合物的模板剂，“a”表示A的加权平均化合价，为1.0至2.0，“v “是A与Mn的摩尔比，在约0.1至约5之间变化，”b“是Mn的平均化合价并且具有大于3至约4的值，M是选自Al ，Fe 3+，Ca，Sn 4+，Ti，Sb 5+及其混合物，“x”是M与Mn的摩尔比，从0变化到约3.0，“c”是M的加权平均价， 约5.0，“y”是P与Mn的摩尔比，约0.10至约5.0，“z”是mo O与Mn的比值，并且具有由方程z = + E，fra 1/2 + EE（axv + b + xxc + 5xy）确定的值。

Patent Agency Ranking