硫酸

The solution of sulfuric acid was added dropwise to the reaction vessel contained 1,3-dichloro-2-propanol, sodium dichromate and water.

将硫酸水溶液滴加到1，3-二氯-2-丙醇与重铬酸钠水溶液的混合物中，在温度23~27℃的条件下搅拌反应5 h，重铬酸钠∶1，3-二氯-2-丙醇=1∶2，此条件下收率为79.6%。

Based on laboratory research,the feasible analysis on process technology of producing sodium dichromate from used chromic residue phosphate produced by reused sodium hydroger sulfate in chromate producing system is made,together with its potential market analysis.

铬盐生产厂含铬硫酸氢钠返回系统中再利用所产生的废渣———磷酸铬渣，通过实验室研究，可生产重铬酸钠。

Conceal disturbing elements like iron,copper,lead with hydrogen fluoride amine-EDTA,add the potassium iodide to separate iodine, and take starch as indicator,titrate with sodium hyposulfite.

试样以王水分解、泡塑富集分离金，硫脲解脱，以硝酸-硫酸破坏硫脲，用氟化氢胺-EDTA掩蔽铁、铜、铅等干扰元素，加碘化钾使之析出碘，以淀粉为指示剂，用硫代硫酸钠进行滴定。

It is indicated that BET specific surface area is most significant influenced by reaction temperature, and the sequence of influence level are concentration of sodium silicate, cocurrent time and concentration of vitriol.

实验结果表明，反应温度对沉淀二氧化硅的BET比表面积的影响最大，其次是硅酸钠浓度、并流时间和硫酸浓度。

Sodium laureth sulfate is just one common example.

钠laureth硫酸只是一个常见的例子。

Sodium dodecyl sulfate is the type representative of the anion sulfate genera SDS. It is useful for comprehensive.

十二烷基硫酸钠是阴离子硫酸酯类表面活性剂的典型代表，具有广泛的用途。

objective to establish the detection method of bacterial endotoxin for chondroitin sulfate a sodium injection.

目的建立检查硫酸软骨素a钠注射液细菌内毒素的方法。

The speed of attack of sodium sulfate is faster than the one of attack of magnesium sulfate under various factors.

在各种影响因素下，硫酸钠侵蚀破坏的速度比硫酸镁侵蚀快。

Penicillin G sodium salt, streptomycin sulfate salt, and reagent grade sodium tetraborate were used in experiments assessing the effects of antibiotics on metal sensitivity.

青霉素G钠盐，硫酸链霉素盐，试剂级硼砂是在实验中使用的评估抗生素对金属的敏感性。

Then,the mother liquor was used in solarization salt-making,and obataned CaSO4·2H2O was used in production of calcium sulfate whisker through dissolving,heating,filtrating,and cooling crystallization transformation process.It has provided a new technical route for comprehensive utilization of sodium sulfate bittern resource.

处理后的清液可用于日晒制盐， CaSO4·2H2O 沉淀经溶解、加热、过滤、冷却结晶转化可生产硫酸钙晶须，为硫酸钠型卤水资源的综合利用提供了一条新的技术路线。

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％。