排序方式: 共有41条查询结果,搜索用时 203 毫秒
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绿色清洗——专业清洗可持续发展的途径 总被引:4,自引:3,他引:1
绿色清洗近年来已成为国外清洗界的热点领域,绿色清洗正在成为专业清洗可持续发展的途径。介绍了绿色清洗的定义及其绿色清洗产品和绿色清洗方法的具体内容。 相似文献
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采用电化学阻抗与能谱图研究了钼酸盐复合缓蚀剂在天然海水中的缓蚀机理。阻抗谱表明,该缓蚀剂通过增大金属表面的电荷转移电阻而降低电化学腐蚀速率;X射线光电子能谱(XPS)显示钼酸盐复合缓蚀剂在海水中的碳钢表面主要形成了Fe3O4、Fe2O3,以及三价铁与钼酸根和缓蚀剂中有机成分形成的有机铁络合物。能量谱(EDS)测试结果表明,添加了钼酸盐复合缓蚀剂的碳钢表面膜中钙元素含量很低(0.08%),表明缓蚀剂中具有阻垢性能的有机瞵酸盐(HEDP)和葡萄糖酸盐对海水中的Ca2+起络合分散作用,阻止了钙盐在金属表面的沉积,这也表明该缓蚀剂具有缓蚀性能的同时又具有良好的阻垢性能。 相似文献
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海水中紫铜缓蚀剂的缓蚀性能及表面分析 总被引:1,自引:0,他引:1
采用失重法、极化曲线、扫描电镜和XPS能谱分析等方法,对苯并三氮唑(BTA)及其复合缓蚀剂对海水中紫铜的缓蚀性能进行了试验。结果表明,BTA与柠檬酸钠之间存在很好的协同效应,当BTA浓度为2mg/L,柠檬酸钠浓度为20mg/L时,缓蚀率达到96.0%,腐蚀速率为10μm/a。极化曲线试验结果表明,BTA与柠檬酸钠复合缓蚀剂为混合型缓蚀剂。扫描电镜和XPS能谱分析表明,体系中添加了BTA和柠檬酸钠复合缓蚀剂后紫铜表面光亮,基本没有腐蚀;且在试片表面形成了Cu_2O、Cu(Ⅰ)-BTA和Cu(Ⅰ)-络合物的非水溶性保护膜,从而有效地抑制了紫铜在海水中的溶解腐蚀。 相似文献
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非均相催化一步合成碳酸二苯酯及溶胶凝胶法制备催化剂载体合成条件的优化 总被引:1,自引:0,他引:1
The support of catalyst for the direct synthesis of diphenyl carbonate (DPC) by heterogeneous catalytic reaction was prepared by the sol-gel method. Compared with activated charcoal, molecular sieve, porous ceramics, hopcalite, the support prepared by the sol-gel method has higher activity. The characterization of the support by X-ray diffraction (XRD) and transmission electron microscope (TEM) show that the mare crystal phase is Co2MnO4 and the average particle diameter is about 40 nm. The optimum conditions for synthesis of the support were determined by orthogonal experiments, which indicate that the proportion of Cu, Mn, and Co is the first important factor influencing the yield and selectivity of DPC. Temperature of calcination is the second one. The optimum conditions are: molar proportion of Cu, Mn, and Co being 1 : 1 : 1, temperature of calcination 700℃, drying at 100~C, temperature of water bath 85~C. The yield and selectivity of DPC in the process can reach 38% and 99% in the batch operation, respectively. The copper cobalt manganese mixed oxides chosen as the support contribute more to the high catalytic activity than the sol-gel method. 相似文献
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