NaAlO_2溶液中铝酸根离子的微观结构  

Microstructure of Aluminate Anion in NaAlO_2 Solution

作　　者：曾双亲[1] 杨清河[1] 陈小新[1] 聂红[1] 

机构地区：[1]中国石化石油化工科学研究院,北京100083

出　　处：《石油学报（石油加工）》2012年第3期374-379,共6页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：中国石油化工股份有限公司生产系列拟薄水铝石新技术的研发及工业应用项目(108014)资助

摘　　要：采用IR、27Al NMR和UV 3种波谱方法对不同方式配制的Al2O3浓度和苛性系数基本相同的4种NaAlO2溶液进行了详细的表征。结果表明,IR、27Al NMR和UV 3种光谱方法给出的信息可以相互补充支持,共同给出NaAlO2溶液中铝酸根离子的微观结构。溶液配制方式对NaAlO2溶液中铝酸根离子的微观结构具有显著影响,4种NaAlO2溶液中的铝酸根均以四配位[Al(OH)4]-为主体离子,可以排除六配位[Al(OH)6]3-的存在;二聚[Al2O(OH)6]2-的含量因配制方式不同存在显著差别,在方式I配制的溶液中二聚[Al2O(OH)6]2-含量很少或不存在,在方式Ⅱ、Ⅲ、Ⅳ配制的溶液中显著存在二聚[Al2O(OH)6]2-,在溶液Ⅱ、Ⅲ中还存在尚未确定结构的离子。Three spectra, IR,27Al NMR and UV, were applied to characterize four sorts of NaA102 solutions I , Ⅱ , Ⅲ and IV with the same A12Oa and Na20 concentrations prepared by different procedures. The results showed that the information from IR, 27Al NMR and UV could give out the microstructure composition of NaAlO2 solution collaboratively. The preparation procedure significantly affected the microstructure composition of NaAlO2 solution. Four-coordinative aluminum species （FAI（OH）4]-） was dominant in all of the four NaAlO2 solutions and the existence of species [-Al（OH）63 could be excluded in them. The contents of dimmer [-Al2O（OH）6]2 were different in the four solutions prepared by different procedures. There was very little amount of dimmer [-Al2O（OH）6-]2 in solution I, but much more in the other three ones. In the NaA102 solution Ⅱ and Ⅲ, there was another uncertain Al specie whose band appeared at 370 nm in UV spectrum.

关 键 词：NaAlO2溶液 铝酸根离子 微观结构 表征 

分 类 号：TE624.9[石油与天然气工程—油气加工工程]