ANION EXCHANGE STUDIES. XIX. ANION EXCHANGE PROPERTIES OF HYDROUS ZIRCONIUM OXIDE1,2
ANION EXCHANGE STUDIES. XIX. ANION EXCHANGE PROPERTIES OF HYDROUS ZIRCONIUM OXIDE1,2
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阴离子交换研究。
DOI：
10.1021/ja01582a068
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发表时间：
1956
影响因子：
15
通讯作者：
H. O. Phillips
中科院分区：
文献类型：
--
作者：
K. Kraus;H. O. Phillips
主席先生：在寻找可能具有阴离子交换性能的无机材料时，对水合氧化锆的研究显得特别吸引人。它极不溶，对酸、碱、氧化和还原剂的侵蚀不敏感。本文描述了“氢氧化锆”的一些吸附性能。8如果人们认为它是由已知存在于溶液中的带正电的锆聚合物形成的，4在氢氧化物沉淀或随后的干燥过程中部分交联成网络，则阴离子交换性质是可以预期的。此外，一些氢氧化物(或氧化物)，如氧化铝或氢氧化铁，长期以来一直被认为是许多材料的良好吸附剂。“氢氧化锆”是用氨水从重结晶的氧氯化锆中沉淀出来的，离心后烘干(室温至800℃)，研磨并上浆。这些材料的组成不确定，含有少量的水和氯离子。它们在酸性溶液中对负离子，如Cl-、Br3-、N03-，特别是对硫酸盐和铬酸盐表现出良好的吸附性能，对一些复杂的阴离子也表现出很好的选择性。在较低的干燥温度下，它们表现出很好的从酸性溶液中吸收负离子的能力，例如，如果在32℃干燥，对铬酸盐的表观容量约为每公斤1.4摩尔。虽然吸附容量随着焙烧温度的升高而降低，但在300℃以下不会过大。材料上的吸附可以用离子交换术语来描述。材料表现出典型的阴离子交换置换反应，至少在低负载量时，交换基本上是理想的，例如在示踪剂溴-N03-交换实验中，溴-的分配系数D(每公斤量)。吸附剂/每升溶液的量)与Mn03-成反比。这种材料应该归类为弱碱性交换剂，因为即使在强酸性溶液中，表观容量也取决于酸度。虽然不能研究吸附速率，但在吸附-洗脱实验中，交换器很容易对条件的变化做出反应，并且在合理的流速(例如，1厘米)下显示出洗脱带。每分钟)预期的高斯分布。鉴于它们具有高化学稳定性、高吸附能力、快速响应、
Sir: In a search for inorganic materials whichmight exhibit anion exchange properties, investigation of hydrous zirconium oxide appeared particularly attractive. It is extremely insoluble and is ex-pected to be insensitive to attack by acids, bases, oxidizing and reducing agents. Some adsorption properties of “zirconium hydroxide” have been de-scribed. 8 Anion exchange properties might be anticipated if one visualizes it to be formed from positively charged zirconium polymers, known to occur in solution, 4 which are partially cross-linked into a network during hydroxide precipitation or subsequent drying. Further, some hydroxides (or oxides) such as aluminum oxide or ferric hy-droxide5 6 have long been known to be good adsorbents for a number of materials.“Zirconium hydroxide” was precipitated from recrystallized zirconium oxychloride with ammonia, centrifuged off, dried (room temperature to 800), ground and sized. The materials, of indefinite composition, contained small amounts of water and chloride ions. They showed good adsorption in acidic solutions for negative ions, eg, Cl-, Br-, N03-, and particularly sulfate and chromate and some, though small, selectivity for complex anions. At low drying temperatures they showed good uptake of negative ions from acidic solutions, eg, if dried at 32 apparent capacity for chromate was ca. 1.4 molesper kg. Though adsorptive capacity decreases with firing temperature, this does not be-come excessive below ca. 300. Adsorption on the materials can be described in terms of ion exchange terminology. The materials show typical anion exchange displacement reactions and, at least at low loading, exchange is essentially ideal, eg, in tracer Br--N03-exchange experimentsthe dis-tribution coefficients D of Br-(amount per kg. adsorber/amount per liter solution) were inversely proportional to M N03-. The materials should be classed as weak-base exchangers, since even in strongly acidic solutions apparent capacity is dependent on acidity. Although studies of rates of adsorption are not avail-able, in adsorption-elution experiments the ex-changers respond readily to changes in conditions, and elution bands showed at reasonable flow rates (eg, 1 cm. per minute) the expected Gaussian dis-tributions. In view of their high chemical sta-bility, high adsorptive capacities, rapid response,