氢氧化钠

Light oil, ferrocene, EPA light hydrocarbon, dimethyl ether, xylene, acetone, hydroquinone, potassium permanganate, petroleum ether, naphtha, thiol, butane, sodium hydroxide , synthesis gas reactor

轻质油，二茂铁，轻烃碳五，二甲醚，二甲苯，丙酮，对苯二酚，高锰酸钾，石油醚，石脑油，硫醇，丁烷，氢氧化钠，合成液化气反应罐

The effects of solvents and salts on the formation of a third liquid phase, distribution of catalyst, reaction mechanism and reaction rate in the reaction between n-butyl bromide and sodium phenolate with tetrabutylammonium bromide as a phase transfer catalyst were investigated.

中文摘要本文系针对以溴化四丁基铵为相间转移触媒催化正溴丁烷与酚化钠之反应，研究溶剂种类及盐类与碱类之添加量对形成第三液相、触媒分布、反应机构及反应速率之影响，被测试之溶剂包括氯苯、甲苯与正己烷，而在盐类与碱类效应的研究中，则测试溴化钠与氢氧化钠。

The optimum conditions were reaction temperature 120°C, reaction time 20h, mole ratio of 5-chloromethyl-2-oxazolidinone and sodium phenolate 1:1. 3,5-Dimethylphenol and epichlorohydrin in sodium hydroxide were condensated to give l,2-epoxy-3-phenoxy propane, then the reation of l,2-epoxy-3-phenoxypropane and the carbamate afforded oxazolidinone in the yields of 69.0%~76.0%. The side reaction had been avoided effectively by the uses of the excessive epichlorohydrin and mixed catalysts.

用3，5-二甲基苯酚和环氧氯丙烷在氢氧化钠存在下缩合生成苯氧基环氧丙烷，然后和氨基甲酸酯反应生成噁唑烷酮，采用过量环氧氯丙烷和使用混合催化剂，有效的避免了副反应的发生，提高了噁唑烷酮的产率，产率69.0%～76.0%。

The first process is failed, which is for manufacture of monopotassium phosphate and sodium chlorate from potassium chloride, phosphoric acid and sodium hydroxide.

以氯化钾、磷酸和氢氧化钠为原料联产磷酸二氢钾和氯酸钠的工艺路线还存在一些问题。

More generally, lye is any strong alkaline solution or solid, such as sodium hydroxide or potassium hydroxide.

更广义地说，碱液是任何一种强碱溶液或固体，诸如氢氧化钠或氢氧化钾。

A 20% solution of either Potassium Hydroxide or Sodium Hydroxide is recommended for air testing.

注意：在使用腐蚀性溶液要戴防护眼镜，穿防护服。20%氢氧化钾或者氢氧化钠被推荐用于空气测定。

The results showed that the most important factors related to the accuracy were the recrystallized potassium persulfate and the sodium hydroxide.

通过试验发现，过硫酸钾、氢氧化钠的纯度是影响测定准确性的最重要因素，其中分析纯AR级的过硫酸钾(K2S2O8)经纯化处理可以降低空白值；消解时间的延长和消解温度增加对提高实验准确性的影响不显著。

To make a 20% solution, slowly add 100 grams of Potassium or Sodium Hydroxide crystals to 500 cc's of distilled water and store in a sealed jar.

制作20%的溶液，缓慢添加100g氢氧化钾或者氢氧化钠晶体到500蒸馏水中，储存在密封的广口瓶中。

NaOH also has the ability to extract reversely QOPh from the organic phase or the third liquid phase to the aqueous phase.

氢氧化钠另具有将QOPh从有机相或第三液相萃取至水相的能力。

Results The purification effect was satisfactory when the concentration of original solution of the extract of Cacumen Platycladi was 0.20 gmL^(-1), the loading amount was 0.375 g of Cacumen Platycladi per 1 mL of wet AB-8 resin, the adsorption velocity was 1 mLmin^(-1), the eluant was 70% alcohol being 4 times as much as the resin volume, and the elution velocity was 2 mLmin^(-1). AB-8 resin could be used for 3 times repeatedly after being reproduced by 95% of ethanol and 1 moLL^(-1) of natrium hydroxydatum. The remaining rate of the total flavonoids and quercitrin was over 70% and 95% respectively, and the remaining rate of peaks 1~3 was over 90%.

结果 AB-8型大孔吸附树脂纯化效果较好，最佳工艺条件为：上样液浓度为含生药量0.20gmL^(-1)，上样量为每1mL湿树脂上样0.375g生药，吸附速率为1mLmin^(-1)，洗脱液为4倍柱体积的70%乙醇，洗脱速率为2mLmin^(-1)；树脂经95%乙醇和1moLL^(-1)氢氧化钠溶液再生后，可重复使用3次。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。