【摘要】 筛选沸石止血剂附载金属离子的种类及附载量,将依据标准曲线合成的不同金属离子含量的5A沸石300℃下烘烤12 h,去除沸石中的自由水和结合水后,在湿度为0%的条件下,利用微热量热仪测定其水合热。结果沸石附载Ag+后水合热可以降低到(396.873±5.712)～(598.399±6.377)J/g;附载Zn2+后可使水合热降低到(578.937±5.334)～(622.438±5.763)J/g;双离子附载后可使水合热降低到(430.572±8.371)～(503.344±5.261)J/g。说明:①Ag+、Zn2+附载均可以降低沸石的水合热,且降低的程度与金属离子附载量密切相关;②相同载量的银型沸石比锌型沸石可以降低更多的水合热;③根据既能达到降低放热反应又节约的原则,沸石止血剂中Ag+、Zn2+的量以2%Ag++8%Zn2+为最佳。更多还原

【Abstract】 To find the optimal concentration of metal ion in the zeolite,the zeolites mixed with different concentration of metal ion were heated to 300℃ and dehydrated completely,the enthalpy of hydration was determined with microcalorimeter.It is resulted that addition of Ag+ decreased the enthalpy of hydration to（396.873±5.712）^{598.399±6.377} J/g,addition of Zn2+ decreased the enthalpy of hydration to（578.937±5.334）^{622.438±5.763} J/g,while addition of Zn2+ and Ag+ decreased the enthalpy of hydration to（430.572±8.371）^{503.344±5.261} J/g.It is conclused that:① These data indicated that addition of Ag+ or Zn2+ decrease the enthalpy of hydration,and this effect is proportional to the concentration of metal ion.② Zeolite with Ag+ decrease the enthalpy of hydration more intensely than the one with same concentration of Zn2+.③For the purpose of minimal enthalpy of hydration,2% Ag+ and 8% Zn2+exchanged zeolite will be optimal choice.更多还原