查询词典 sulphuric acid

Exposed argentite could be dissolved in thiourea acidified by sulphuric acid ,since native Ag is not dissolved in non-oxidizing inorganic acids , hydrochloric acid was used to dissolve the sphalerite and to soak out the argentite which was enveloped in sphalerite .

继以硫酸酸化的硫脲溶剂溶解裸露的辉银矿，然后根据自然银在非氧化性的无机酸中不溶的特性，采用盐酸溶解闪锌矿并浸

For example, acetylene generated by the carbide process contains arsenical and sulphur compounds, and other impurities, which must be removed by scrubbingwith concentrated sulphuric acid before it is sufficiently pure for reaction with hydrochloric acid (此处有误,应为hydrochloride氯化氢) to produce dichloroethane.

例如，由碳化钙发生的乙炔气含有砷和硫的化合物以及其他的杂质，必须在乙炔有足够的纯度与氯化氢反应制造二氯乙烷之前，用浓硫酸洗去这些杂质。

Aiming at the problems existed in the oxidative separating of zinc, cobalt and in the peroxysulphate production process, base on the summarizing of correlative research, through the study of the potential - pH picture of S-H2O system and the theoretical electrobath voltage, we explored the technology of electrolytic preparation of ammonium peroxysulphate and peroxysulphuric acid, taking ammonium sulphate and sulphuric acid as the raw material separately.

针对氧化分离锌钴和过二硫酸盐生产过程中存在的问题，在总结相关研究的基础上，通过研究S—H_2O系电位—pH图、计算理论槽电压，探索了以硫酸铵和硫酸为原料，电解法制备过二硫酸铵和过二硫酸的工艺。

By means of investigation of parameters (reactant strengths electrobath voltage reaction time reaction temperature membrane stuff material variety and the additive) in the sulfate and sulphuric acid electrolysis process, and compared the electrolysis process through analyzing several important technique factors, found the optimized parameters of peroxysulphate and peroxysulphuric acid electrolysis preparation.

通过对硫酸铵、硫酸电解过程中各工艺参数(反应物浓度、槽电压、反应时间、反应温度、膜材料、阴极室物料种类、添加剂)的考察，并结合对电解过程中重要技术指标的比较分析，确定了电解制备过二硫酸铵以及过二硫酸的较优条件，为工业化电解制备过二硫酸铵以及过二硫酸提供了可靠的基础数据以及工艺参数。

Calculate the volume of acid required for dilution to 100 cm3 of 1 M sulphuric acid.

若要把生产的硫酸稀释成100 cm3的1 M硫酸，需用多少体积的酸

Technology of synthesis of 2, 4, 8-trichloronitrobenzene by 1, 3, 5-trichlorobenzene, sulphuric acid and nitric acid was studied.

以1， 3， 5-三氯苯为原料，在浓硫酸与浓硝酸的作用下硝化成2， 4， 6-三氯硝基苯。

In medium of mixed sulphuric acid and phosphoric acid, with N-phenylated anthranilic acid as a tracer agent, the standard solution of ammonium ferrous sulphate is used to titrate chromium.

试样以硝酸、氢氟酸溶解，加高氯酸冒烟驱除硅和氟，并将铬氧化为六价，在硫磷混合酸介质中，以N-苯代邻氨基苯甲酸为指示剂，用硫酸亚铁铵标准溶液滴定铬。

In order to improve the electrocatalytic activity of the anode in the Direct Methanol Feul Cell, three kinds of transition metal substituted phosphomolybdic acid modified platinum electrodes were prepared, and the electrochemical behavior in the sulphuric acid solution of transition metal substituted phosphomolybdic acid modified platinum electrodes and their electrocatalytic effects of methanol oxidation were studyed. The anti-poison effect to carbon monoxide of the prepared electrodes were studied by the carbon monoxide adsorbing.

为了提高直接甲醇燃料电池阳极催化活性，本文研究了三种过渡金属取代磷钼酸修饰铂电极在硫酸溶液中的电化学行为及对甲醇的电催化氧化作用，并利用一氧化碳吸附实验评价了三种过渡金属取代磷钼酸修饰铂电极的抗一氧化碳毒化性能。

To obtain sulphuric acid, Cyrus Harding had only one operation to make,to calcine the sulphate of iron crystals in a closed vase, so that thesulphuric acid should distil in vapor, which vapor, by condensation, wouldproduce the acid.

赛勒斯·史密斯制造硫酸的最后一道工序，是把硫酸铁的结晶密封在瓶子里，进行锻烧，使之蒸发为水汽，经过冷却，就可以变成硫酸了。

This year the company operating the various organic chemical raw materials, varieties are: methanol, ethanol, ethylene glycol, butanol, isobutanol, isopropanol, glacial acetic acid, vinyl acetate, B lipid, Ding acetic acid lipid, styrene, toluene, phthalic anhydride, xylene, acetone, butanone, cyclohexanone, DMF, sulphuric acid, methyl isobutyl ketone, glycol Dingmi, three toluene, 2 Xin fat, melamine.

本公司常年经营各种有机化工原料，品种有：甲醇、乙醇、乙二醇、正丁醇、异丁醇、异丙醇、冰醋酸、醋酸乙烯、醋酸乙脂、醋酸丁脂、苯乙烯、甲苯、苯酐、二甲苯、丙酮、丁酮、环己酮、DMF、硫酸、甲基异丁基酮、乙二醇丁醚、三甲苯、二辛脂、三聚氰胺。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。