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公开(公告)号：US5182026A
公开(公告)日：1993-01-26
申请号：US856615
申请日：1992-05-04
申请人： William C. Pike
发明人： William C. Pike
CPC分类号： B01J45/00 , B01J41/043 , B01J41/14 , Y10S423/14
摘要： Disclosed are novel ion-exchange and chelate-exchange resins having improved exchange kinetics for separating chemical species from liquids. The resins are prepared from copolymer beads consisting of a monovinyl aromatic monomer and a cross-linking monomer. The copolymer beads are functionalized such that weak-base exchange moieties are substituted at haloalkylated sites which are most accessible to diffusion into the beads, while hydrophilic, strong-base exchange moieties are substituted at haloalkylated sites which are least accessible to diffusion. The resins have improved exchange kinetics due to shortened diffusion path lengths for the chemical species being separated and improved diffusion into the resin beads due to the hydrophilic, strong-base exchange moieties.
摘要翻译： 公开了具有改进的用于将化学物质与液体分离的交换动力学的新型离子交换和螯合交换树脂。 树脂由由单乙烯基芳族单体和交联单体组成的共聚物珠制备。 共聚物珠被官能化，使得弱碱交换部分在卤代烷基化位点被取代，其最容易扩散到珠中，而亲水的强碱交换部分在不能扩散的卤代烷基化位点被取代。 由于亲水的强碱交换部分，由于分离的化学物质的扩散路径长度缩短和树脂珠粒的扩散，树脂具有改善的交换动力学。
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12.发明授权Process for making carboxylic acid esters using a crosslinked acrylic resin as the catalyst 失效使用交联丙烯酸树脂作为催化剂制备羧酸酯的方法
公开(公告)号：US4970333A
公开(公告)日：1990-11-13
申请号：US114893
申请日：1987-10-29
CPC分类号： C07C67/26
摘要： The production of esters via the reaction of an epoxide with a carboxylic acid hasbeen shown to give improved activity when a strong base macroporous anion exchange resin having an acrylic backbone is used in place of a styrene-divinylbenzene based anion exchange resin having an equivalent exchange capacity. Excellent results are obtained when acrylic acid and propylene oxide are reacted together in the presence of strong base macroporous anion exchange resins which have an acrylic backbone.
摘要翻译： 通过环氧化物与羧酸的反应制备酯已经显示出，当使用具有丙烯酸骨架的强碱性大孔性阴离子交换树脂代替具有等效交换容量的苯乙烯 - 二乙烯基苯阴离子交换树脂时，可提供更好的活性 。 丙烯酸和环氧丙烷在具有丙烯酸骨架的强碱性大孔阴离子交换树脂的存在下一起反应时，可获得优异的结果。
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