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结晶工艺及设备的最新进展 总被引:2,自引:0,他引:2
简单叙述了声场和磁场对结晶理论的最新进展,综述了反应结晶、真空结晶、无溶剂结晶、高压结晶、膜结晶、萃取结晶、蒸馏——结晶耦合、超临界流体(SCF)结晶、升华结晶等结晶技术及部分结晶器。 相似文献
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对石灰制取二氧化锆生产中结晶氯氧化锆的方法进行了比较,提出了加氯化钙结晶的新工艺,对影响氯氧化锆结晶率的因素进行了研究。结果表明,加氯化钙结晶的工艺具有结晶时间短、结晶率较高、生产效率高、缓解体系溶液膨胀的特点。 相似文献
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Tin electrodeposition in its initial stages in acid sulfate/gluconate baths was studied with varying tin and gluconate concentrations using potential-controlled electrochemical techniques. The deposit morphology was observed by scanning electron microscopy (SEM). A comparison with tin electrodeposition from acid sulfate baths in the absence of gluconate was also carried out. Use of a highly acidic bath leads to nonuniform deposits, even in the presence of gluconate; at pH 4 deposits are uniform, brilliant and suitable for finishing applications. Tin crystallites have a well defined morphology which depends on bath agitation conditions. In the absence of agitation, the crystallites have the same tetragonal shape as in a sulfate bath without gluconate. 相似文献
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文章采用了分光光度法测定葡萄糖催化氧化产物葡萄糖酸钠的含量,并与碘量法测定产品中残糖的含量进行比较。结果表明,采用分光光度法,操作简便易行,结果可靠,可作为葡萄糖催化氧化产物葡萄糖酸及其盐类的常规分析。 相似文献
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The effect of gluconate on the deposition rate and the deposit composition was examined at low pH of solution. The deposition rate exhibit a maximum and the content of copper present a minimum when the gluconate concentration changes between 0 and 40 g/l. The kinetic study carried out by cyclic voltammetry and electrochemical impedance showed that the gluconate acts on the anodic and cathodic reactions. The activation energy of the alloy deposition was determined. In addition, gluconate does not affect the crystallinity of the Ni-Cu-P deposit. 相似文献
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采用生物发酵法从葡萄糖直接制备葡萄糖酸镁,实验表明:温度在31℃,摇床转速250r/min,pH4~6时,其发酵转化率为8738%,产品的结构经元素分析和IR确证 相似文献