Polymer-supported 4-(N-benzyl-N-methylamino)pyridine catalyst and
process for same
    1.
    发明授权
    Polymer-supported 4-(N-benzyl-N-methylamino)pyridine catalyst and process for same 失效
    聚合物负载的4-(N-苄基-N-甲基氨基)吡啶催化剂及其方法

    公开(公告)号:US5229479A

    公开(公告)日:1993-07-20

    申请号:US699694

    申请日:1991-05-14

    IPC分类号: C07D213/74 C08F2/18

    CPC分类号: C07D213/74

    摘要: A cross-linked polymer-supported 4-(N-benzyl-N-methylamino) pyridine material and process for its preparation in high yield and having effective physical and catalytic properties. The polymer-supported catalyst is characterized by the suspension copolymerization of an organic phase containing the corresponding vinyl-substituted pyridine monomer, a styrene monomer, and a suitable cross-linking agent and free radical-generating catalyst in the presence of an aqueous phase containing a cellulose ether derivative as the stabilizing agent. The catalyst is further characterized by its yield in excess of 90% by weight and by its predominant and generally spherical and smooth bead form and substantially uniform size that is efficiently hard and durable and possesses sufficient catalytic activity for effective use in acylation, alkylation or other related reactions.

    摘要翻译: 交联聚合物负载的4-(N-苄基-N-甲基氨基)吡啶材料及其高产率制备并具有有效物理和催化性能的方法。 聚合物负载的催化剂的特征在于在含有相应的乙烯基取代的吡啶单体,苯乙烯单体和合适的交联剂和产生自由基的催化剂的有机相的悬浮共聚, 纤维素醚衍生物作为稳定剂。 催化剂的特征还在于其产率超过90重量%,其主要和通常为球形和平滑的珠粒形式和基本上均匀的尺寸,其有效硬度和耐久性并且具有足够的催化活性,有效用于酰化,烷基化或其它 相关反应。

    Polymer-supported 4-(N-benzyl-N-methylamino)pyridine catalyst and
process for same
    2.
    发明授权
    Polymer-supported 4-(N-benzyl-N-methylamino)pyridine catalyst and process for same 失效
    聚合物负载的4-(N-苄基-N-甲基氨基)吡啶催化剂及其方法

    公开(公告)号:US5015706A

    公开(公告)日:1991-05-14

    申请号:US247152

    申请日:1988-09-21

    CPC分类号: C07D213/74

    摘要: A cross-linked polymer-supported 4-(N-benzyl-N-methylamino) pyridine material and process for its preparation in high yield and having effective physical and catalytic properties. The polymer-supported catalyst is characterizd by the suspension copolymerization of an organic phase containing the corresponding vinyl-substituted pyridine monomer, a styrene monomer, and a suitable cross-linking agent and free radical-generating catalyst in the presence of an aqueous phase containing a cellulose ether derivative as the stabilizing agent. The catalyst is further characterized by its yield in excess of 90% by weight and by its predominant and generally spherical and smooth bead form and substantially uniform size that is efficiently hard and durable and possesses sufficient catalytic activity for effective use in acylation, alkylation or other related reactions.

    摘要翻译: 交联聚合物负载的4-(N-苄基-N-甲基氨基)吡啶材料及其高产率制备并具有有效物理和催化性能的方法。 聚合物负载的催化剂的特征是在含有相应的乙烯基取代的吡啶单体,苯乙烯单体和合适的交联剂和产生自由基的催化剂的有机相在含有 纤维素醚衍生物作为稳定剂。 催化剂的特征还在于其产率超过90重量%,其主要和通常为球形和平滑的珠粒形式和基本上均匀的尺寸,其有效硬度和耐久性并且具有足够的催化活性,有效用于酰化,烷基化或其它 相关反应。

    4-(N-benzyl-N-methylamino)pyridine acid salts and use in preparation of
polymer-supported catalysts
    3.
    发明授权
    4-(N-benzyl-N-methylamino)pyridine acid salts and use in preparation of polymer-supported catalysts 失效
    4-(N-苄基-N-甲基氨基)吡啶酸盐,并用于制备聚合物负载的催化剂

    公开(公告)号:US5183895A

    公开(公告)日:1993-02-02

    申请号:US836257

    申请日:1992-02-18

    IPC分类号: C07D213/74

    CPC分类号: C07D213/74

    摘要: A cross-linked polymer-supported 4-(N-benzyl-N-methylamino) pyridine material and process for its preparation in high yield and having effective physical and catalytic properties. The polymer supported catalyst is characterized by the suspension copolymerization of an organic phase containing the corresponding vinyl-substituted pyridine monomer, a styrene monomer, and a suitable cross-linking agent and free radical-generating catalyst in the presence of an aqueous phase containing a cellulose ether derivative as the stabilizing agent. A purified acid salt of the vinyl-substituted pyridine monomer useful in polymerizations and stable for storage as either a solid or an aqueous solution.

    摘要翻译: 交联聚合物负载的4-(N-苄基-N-甲基氨基)吡啶材料及其高产率制备并具有有效物理和催化性能的方法。 聚合物负载催化剂的特征在于在含有纤维素的水相存在下,含有相应的乙烯基取代的吡啶单体,苯乙烯单体和合适的交联剂和产生自由基的催化剂的有机相的悬浮共聚 醚衍生物作为稳定剂。 乙烯基取代的吡啶单体的纯化酸盐可用于聚合并稳定存储为固体或水溶液。

    4-(N-benzyl-N-methylamino)pyridine acid salts and use in preparation of
polymer-supported catalysts
    5.
    发明授权
    4-(N-benzyl-N-methylamino)pyridine acid salts and use in preparation of polymer-supported catalysts 失效
    4-(N-苄基-N-甲基氨基)吡啶酸盐,并用于制备聚合物负载的催化剂

    公开(公告)号:US5147954A

    公开(公告)日:1992-09-15

    申请号:US609393

    申请日:1990-11-05

    IPC分类号: C07D213/74 C08F12/26

    CPC分类号: C07D213/74 C08F12/26

    摘要: A cross-linked polymer-supported 4-(N-benzyl-N-methylamino) pyridine material and process for its preparation in high yield and having effective physical and catalytic properties. The polymer-supported catalyst is characterized by the suspension copolymerization of an organic phase containing the corresponding vinyl-substituted pyridine monomer, a styrene monomer, and a suitable cross-linking agent and free radical-generating catalyst in the presence of an aqueous phase containing a cellulose ether derivative as the stabilizing agent. A purified acid salt of the vinyl-substituted pyridine monomer useful in polymerizations and stable for storage as either a solid or an aqueous solution.

    摘要翻译: 交联聚合物负载的4-(N-苄基-N-甲基氨基)吡啶材料及其高产率制备并具有有效物理和催化性能的方法。 聚合物负载的催化剂的特征在于在含有相应的乙烯基取代的吡啶单体,苯乙烯单体和合适的交联剂和产生自由基的催化剂的有机相的悬浮共聚, 纤维素醚衍生物作为稳定剂。 乙烯基取代的吡啶单体的纯化酸盐可用于聚合并稳定存储为固体或水溶液。

    Highly selective chelating resins and monomers for their preparation
    7.
    发明授权
    Highly selective chelating resins and monomers for their preparation 失效
    高选择性螯合树脂及其制备单体

    公开(公告)号:US5180822A

    公开(公告)日:1993-01-19

    申请号:US750467

    申请日:1991-08-27

    摘要: Described are preferred monomers including a vinylbenzyl moiety N-bonded to an alkylaminopyridinyl or pyridylimidazolyl function. Also described are preferred acid salts of such monomers. Additionally, preferred processes involving and resins formed from these preferred monomers are described. The preferred resins are highly selective for valuable heavy metal ions such as copper and demonstrate superior iron rejection values.

    摘要翻译: 描述的是优选的单体,包括与烷基氨基吡啶基或吡啶基咪唑基官能团N-键合的乙烯基苄基部分。 还描述了这些单体的优选酸盐。 此外,描述了涉及由这些优选单体形成的优选方法和由这些优选的单体形成的树脂。 优选的树脂对于有价值的重金属离子如铜是高度选择性的并且表现出优异的铁排斥值。

    Processes for recovering citric acid
    8.
    发明授权
    Processes for recovering citric acid 失效
    回收柠檬酸的方法

    公开(公告)号:US6137004A

    公开(公告)日:2000-10-24

    申请号:US485348

    申请日:1995-06-07

    CPC分类号: C07C51/47 C07C51/487

    摘要: Described are preferred processes for recovering citric acid from a medium in which it is contained. The citric acid is recovered both effectively and in a form which is readily purifiable. In one preferred process, the citric acid-containing medium is contacted with a solid-phase free base resin having tertiary amine groups to adsorb the citric acid. The citric acid is then desorbed by displacement with a stronger acid, and a citric acid-containing fraction is collected substantially free from contamination by the stronger acid. In another preferred process, a citric acid-containing medium is contacted with a solid-phase divinylbenzene-crosslinked polymer having pyridine or aliphatic tertiary amine functions to adsorb citric acid, the contacting being at a temperature below about 40.degree. C. Adsorbed citric acid is then desorbed with hot H.sub.2 O at a temperature of at least about 75.degree. C. Unnecessary impurities such as those arising from the use of organic solvent or throughput inorganic acid desorbents are thereby avoided while at the same time achieving a commercially attractive recovery of the citric acid. Additional preferred modes and process features are also described.

    摘要翻译: 描述了从其所含的培养基中回收柠檬酸的优选方法。 柠檬酸被有效地回收并且以易于净化的形式回收。 在一个优选的方法中,将含柠檬酸的培养基与具有叔胺基团的固相游离碱树脂接触以吸附柠檬酸。 然后通过用较强酸置换来解吸柠檬酸,并且收集基于没有较强酸的污染的含柠檬酸的级分。 在另一优选方法中,含柠檬酸的介质与具有吡啶或脂族叔胺官能团的固相二乙烯基苯交联聚合物接触以吸附柠檬酸,接触温度低于约40℃。吸附的柠檬酸为 然后在至少约75℃的温度下用热的H 2 O解吸。由此避免了不必要的杂质,例如由于使用有机溶剂或通过无机酸脱附而产生的杂质,同时实现了商业上有吸引力的柠檬酸回收 。 还描述了另外的优选模式和处理特征。

    Polyvinylpyridinium anion-exchangers for recovery of technetium and
plutonium anions
    9.
    发明授权
    Polyvinylpyridinium anion-exchangers for recovery of technetium and plutonium anions 失效
    用于回收锝和钚阴离子的聚乙烯基吡啶鎓阴离子交换剂

    公开(公告)号:US5604264A

    公开(公告)日:1997-02-18

    申请号:US415622

    申请日:1995-04-03

    申请人: Donald W. McQuigg

    发明人: Donald W. McQuigg

    摘要: Described are anion-exchange materials having extraordinarily high affinity for plutonium anions such as plutonium (IV), and technetium anions such as pertechnetate. Preferred inventive resins are highly divinylbenzene cross-linked polyvinylpyridine resins exhibiting a macroreticular bead form, which have been quaternized to contain a substantial amount of 1-alkyl-pyridinium groups wherein the alkyl group has 4 to 8 carbon atoms. The inventive resins can be used in preferred processes for recovering plutonium and/or technetium anions from aqueous mediums, for example nuclear waste streams or groundwater related to civilian or defense-related nuclear operations.

    摘要翻译: 描述了对钚阴离子如钚(IV)和锝阴离子如高锝酸盐具有非常高的亲和力的阴离子交换材料。 优选的本发明树脂是显示大网络珠形的高度二乙烯基苯交联的聚乙烯基吡啶树脂,其已被季铵化以含有大量的1-烷基 - 吡啶鎓基团,其中烷基具有4-8个碳原子。 本发明的树脂可用于从水介质中回收钚和/或锝阴离子的优选方法,例如与民用或与国防有关的核作业相关的核废料流或地下水。

    Polyvinylpyridinium anion-exchangers for recovery of technetium and
plutonium anions
    10.
    发明授权
    Polyvinylpyridinium anion-exchangers for recovery of technetium and plutonium anions 失效
    用于回收锝和钚阴离子的聚乙烯基吡啶鎓阴离子交换剂

    公开(公告)号:US5693680A

    公开(公告)日:1997-12-02

    申请号:US801629

    申请日:1997-02-18

    申请人: Donald W. McQuigg

    发明人: Donald W. McQuigg

    摘要: Described are anion-exchange materials having extraordinarily high affinity for plutonium anions such as plutonium (IV), and technetium anions such as pertechnetate. Preferred inventive resins are highly divinylbenzene-crosslinked polyvinylpyridine resins exhibiting a macroreticular bead form, which have been quaternized to contain a substantial amount of 1-alkyl-pyridinium groups wherein the alkyl group has 4 to 8 carbon atoms. The inventive resins can be used in preferred processes for recovering plutonium and/or technetium anions from aqueous mediums, for example nuclear waste streams or groundwater related to civilian or defense-related nuclear operations.

    摘要翻译: 描述了对钚阴离子如钚(IV)和锝阴离子如高锝酸盐具有非常高的亲和力的阴离子交换材料。 优选的本发明树脂是显示大网络珠形的高度二乙烯基苯交联的聚乙烯基吡啶树脂,其已被季铵化以含有大量的1-烷基 - 吡啶鎓基团,其中烷基具有4至8个碳原子。 本发明的树脂可用于从水介质中回收钚和/或锝阴离子的优选方法,例如与民用或与国防有关的核作业相关的核废料流或地下水。