碳酸钠

A method for the mercury thiocyanate spectrophotometric determination of chlorine in ore samples was reported in this paper. The sample was sintered with zinc oxide-sodium carbonate and then leached with water.

中文摘要：岩石样品经氧化锌-碳酸钠烧结预处理，用水浸取后澄清，取清液用硫氰酸汞间接分光光度法进行氯的测定。

By using phenolphthalein and methyl orange as indicators, free alkali, zinc and sodium carbonate were titrated with hydrochloric acid and zinc was titrated with EDTA.

提出了EDTA络合滴定和酸碱滴定联合测定碱法炼锌中含锌碱性溶液中游离碱、锌和碳酸钠的新方法。

The high-pure nanometer-sized zinc oxide was prepared by taking sodium carbonate and zinc chlorate as raw materials and using a precipitation-thermal decomposition method.

以碳酸钠和氯化锌为原料，采用沉淀-热分解二步法制备了高纯纳米氧化锌粉体。

The reaction conditions of methanol dehydrogenation to water-free formaldehyde was studied in a 16mm diameter fixed bed ceramic tube reactor,using Na_2CO_3 as catalyst,which was prepared by different ways.

在一个内径为16mm的固定床陶瓷管反应器中，研究了用不同方法制备的碳酸钠催化剂催化甲醇脱氢制无水甲醛反应的工艺条件。

Precipitation behavior of Na2CO3 and Na2SO4 in the evaporation process of sodium aluminate solutions and its influencing factors were respectively investigated.

摘 要：以氧化铝生产中种分母液为对象，研究铝酸钠溶液蒸发过程中碳酸钠和硫酸钠等杂质盐的析出行为及其影响因素。

One of the most widely employed materials of the chemical industry, it is used in manufacturing chlorine, caustic soda, sodium carbonate , bi carbonate of soda, soap, and chlorine bleach, as well as in ceramic glazes, metallurgy, food preservation, curing of hides, road de-icing, water softening, photography, and many consumer products, including mineral waters, mouthwashes, and table salt itself.

氯化钠是化学工业最广泛使用的材料之一，用于制造氯、氢氧化钠、碳酸钠、碳酸氢钠、含氯聚合物，另外在陶瓷釉、冶金、食物保存、皮肤消毒、道路除冰、水的软化、照相及许多消费商品、调味用。

The microstructure of the concrete is changed after FRT.

采用扫描电镜分析了混凝土的微观结构，结果表明，再碱化后，钢筋混凝土的粘结强度得到明显提高；电流、碳酸钠溶液浓度以及再碱化时间时再碱化后的粘结强度有显著影响；混凝土的微观结构发生了改变，孔隙率减小，有利于粘结强度的增加。

Current density, realkalisation time and concentration of sodium carbonate solution have significant effect on the bond strength after FRT.

采用拉拔试验，考虑到电流密度、再碱化时间、碳酸钠溶液浓度等因素研究了再碱化后钢筋混凝土的粘结强度。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。