重铬酸钠

通过提高钝化体系的重铬酸钠的浓度、降低钝化体系温度和提高钝化的电量，增加钝化膜的厚度，提高镀锡板抗氧化的能力。

The oxidation resistance of tinplate was improved by increasing the concentration of sodium dichromate , lowering the temperature of passivation and increasing the charge of passivation , which increased the thickness of passive film .

介绍了一种制取铬酸钙的新方法，利用重铬酸钠溶液分解碳酸钙，可以得到高纯度的铬酸钙。

It is shown that calcium carbonate can be decomposed in aqueous sodium dichromate solution and transformed to calcium chromate at ambient pressure and boiling temperature .

利用工业生产重铬酸钠的废弃物铝泥研制Cr-Al鞣剂，必须首先对铝泥的成分进行分析，并确定合适的方法准确测定铝泥中的Cr、Al含量。

Analysis of aluminum residue and determination of the content of Cr (ⅵ) and Al (ⅲ) in it are essential to utilize aluminum residue , a kind of waste from dichromate industry , for preparation of Cr-Al complex tanning agents .

介绍了用离子膜电解槽电解工业铬酸钠溶液合成重铬酸钠的过程。

A process of electrolytic synthesis of sodium dichromate from industrial sodium chromate solution is introduced .

缓交联铬冻胶体系由部分水解聚丙烯酰胺、重铬酸钠与有机还原剂硫脲组成。

A kind of chromium gel system of retarded crosslinking made of partially hydrolyzed polyacrylamide ( HPAM ), sodium bichromate and organic reductant sulfocarbamide was investigated .

研究了柠檬酸与重铬酸钠的反应历程、生成螯合物的结构以及Cr3+HPAM胶态分散体冻胶的性能。

The reaction mechanism between citric acid and sodium dichromate , the structure of product chelate , and the performances of chromium-HPAM colloidal dispersion gel were studied .

选择氧化法精制催化裂化柴油，以过氧化氢和重铬酸钠作为氧化剂，建立以色号、胶质及氧化沉渣等性质作为评价催化裂化柴油安定性能的主要指标。

The catalytic cracking diesel oil is refined by oxidation method using H_2O_2 and Na_2Cr_2O_7 as oxidants , and the colority , colloid and oxidated sediment as evaluating indexes .

为从源头解决铬盐生产中环境污染的问题，亟需探索清洁高效的重铬酸钠生产技术。

In order to resolve environmental pollution problems from the source in chrome salts production , it is urgent to explore a clean and efficient production technology of sodium dichromate .

利用重铬酸钠铵盐还原法制备三氧化二铬，其工艺简单，产品质量高，可达化学试剂级。

The process for preparating chromium trioxide from sodium dichromate by reduction of ammonium salt is simple and the product has high quality and can be up to chemical regent grade .

化学处理，例如重铬酸钠溶液，可以促进无氧化膜和杂质不锈钢表面的钝化膜更快速度的生成。

Chemical treatments , such as sodium dichromate solutions , may facilitate the more rapid formation of the passive film on a stainless steel surface already free of scale or foreign matter .

考察了以重铬酸钠为氧化剂，胶束催化氧化合成对硝基苯甲酸的有关影响因素。

For the synthesis ofp-nitrobenzoic acid by means of micelles catalytic oxidation , sodium dichromate is used as oxidant , and the best catalyst is found to be dodecyl dimethyl benzyl ammonium bromide .

在线实验测得不同温度、不同电流密度、阳极液不同初始浓度时，铬酸钠电催化合成重铬酸钠和重铬酸钠电催化合成铬酸酐过程中不同反应时间下的工作电压。

The working voltages were experimentally measured on-line at different reaction times under conditions of different temperatures , different current densities , and different initial anolyte concentrations in the electrochemical synthesis process of sodium dichromate and chromic anhydride from sodium chromate and sodium dichromate , respectively .