共查询到20条相似文献,搜索用时 156 毫秒
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对番茄红素的提取工艺和以明胶与蔗糖作为壁材喷雾干燥制备番茄红素微胶囊的工艺进行了探讨.研究表明,经微胶囊化后大大提高了番茄红素的稳定性. 相似文献
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在水泥厂回转窑的工艺操作中,经常会遇到很多问题.笔者在近几年的实践中,总结出了一些操作方法和经验,现归纳如下,与同行们一起探讨研究. 相似文献
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紫外线相关消毒工艺在饮用水处理中的应用 总被引:1,自引:0,他引:1
叙述了国内外紫外线消毒技术在给水处理中的最新研究进展.介绍了紫外线的消毒效果、反应动力学及缺点,对紫外线与其它化学消毒剂联用消毒工艺,以及近年来发展的光催化消毒技术,UV/H2O2工艺用于消毒的可行性进行了分析.对紫外线相关消毒技术的研究趋势进行了展望,认为饮用水消毒方面,应特别针对隐孢子虫,贾第虫以及藻类等的灭活效果及影响因素进行探讨,深入研究紫外线与其它消毒剂的联用技术,加强中压汞灯的光催化消毒效果,机理的研究;藻类控制方面,应系统研究紫外线对不同藻类的灭活剂量以及预处理中对藻毒素、消毒副产物的控制,并加与其它工艺联用除藻工艺的研究. 相似文献
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提出了膨化硝铵炸药水分控制过程检测存在的问题,研究讨论了膨化硝铵炸药半成品和成品的水分检测方法,通过测定方法的改进,提高了检测效率和生产过程控制效果,解决了膨化硝铵炸药生产过程控制的一个难题. 相似文献
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废碳酸锶制备八水氢氧化锶联产硝酸钠研究 总被引:1,自引:1,他引:0
介绍了利用工业SrCO3生产过程中产生的废次碳酸锶生产八水氢氧化锶及硝酸钠的工艺,为废锶的综合利用提出了一条新的途径。 相似文献
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碳酸锶生产方法及前景 总被引:6,自引:0,他引:6
简要介绍了碳还原法、复分解法,酸法,热法、硝酸锶法及醋酸锶法等几种生产碳酸锶的传统方法,重点探讨了一种碳酸锶的绿色生产新技术,该方法实现了辅助技术和溶剂水的闭路循环,具有生产成本低、三废污染少,操作环境良好等优点。 相似文献
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《Journal of the European Ceramic Society》1999,19(9):1741-1746
This paper proposes new preparation methods for alumina–tetragonal zirconia–Ca or Sr hexaluminate composites. Two powder preparation routes were explored. In the first, aluminium and calcium or strontium nitrate hydrates were added to alumina zirconia powders and in the second only calcium or strontium nitrate hydrates were used. Powders produced by the second route are to be preferred since reinforcements do not inhibit the composite sintering process. 相似文献
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Sr5(PO4)2SiO4:Eu2+ phosphosilicate phosphor was prepared by high temperature solid-state reaction. Effects of strontium sources (strontium oxide, strontium nitrate and strontium carbonate) and of phosphorus sources (diammonium phosphate, strontium monophosphate) on the reactivity of their mixture during heating and on phase composition, morphology and photoluminescence excitation and emission properties of the phosphors were investigated by TG–DTG–DSC, XRD, SEM and photoluminescence spectroscopy. The sequence of the solid-state reactions when using the different starting reagents was discussed based on the TG–DTG–DSC results. It was found that it is hard to prepare pure Sr5(PO4)2SiO4:Eu2+ phosphor with either of strontium sources studied when stoichiometric (NH4)2HPO4 was used as a phosphorus source. Minor Sr2SiO4 impurity phase was present in the phosphors. The content of impurity phase, the morphology and resultant photoluminescence properties of the phosphors were markedly influenced by the strontium source employed. When SrCO3 was used as the strontium source, the phase purity of the phosphor was improved with the addition of excess (NH4)2HPO4. When (NH4)2HPO4with 5% excess or SrHPO4 in stoichiometric ratio was used as the phosphorus source a pure phase phosphor was obtained. In addition, the morphology and photoluminescence of the phosphor were also influenced by phosphorus source. The possible reasons causing different properties of the phosphors prepared using different raw materials were discussed based on reaction schemes. 相似文献
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当硫酸盐和亚硫酸盐共存时,对硝酸锶中这2种杂质的测定存在一定的难度。建立了同时测定工业硝酸锶样品中的硫酸盐及亚硫酸盐含量的离子色谱方法。采用ICS-1500型离子色谱仪,选取IonPac AS18作为色谱分离柱,以氢氧化钾进行梯度洗脱,电导检测器检测,线性相关系数达到0.999 4~0.999 6,加标回收率为87.4%~100.8%,相对标准偏差2.9%~3.2%。该方法准确、快速,在生产检测中具有重要意义。 相似文献