查询词典 sulfuric acid

A novel sulphonate oil-displacement surfactant was made in laboratory using ester and fuming sulfuric acid and by hydrolysis and neutralization technologies.

摘要用发烟浓硫酸对油酯进行磺化，水解、中和后制成了磺酸盐驱油剂。

In order to minimize the pollution of the environment with waste acids and/or waste acidic salt solution, following measures were taken:(1) Instead of using excess sulfuric acid, sulfonation reaction was carried out in the presence of excess toluene and the water produced during the sulphonation was removed by azeotropic distillation.

在CLT酸生产中，为了使废酸和酸性废盐水对环境的污染减少到最低程度，采取了如下的措施：(1)与使用过量硫酸相反，磺化反应是在过量甲苯的存在下进行，同时用共沸蒸馏方法移出了磺化过程中产生的水。

The recent processes in the domestic sulphonation units are introduced which concern heat energy recovery, utilizing SO3 from sulfuric acid unit and replacing ESP with fiber precipitator.

介绍了近年来国内磺化装置在热能回收、采用硫酸装置吸收SO_3气体、用布林克多芯纤维除雾器取代静电除雾器处理磺化尾气诸方面所作的努力和工艺流程，对建设资源节约、环境友好型的新装置及老装置改造有借鉴作用。

The ore sample tested was the tail of Pan-Zhi-Huan vanadic titanomagnetite after magneticseparation and froth flotation of the sulfides,with particle size minus 0.315mm and TiO_2 content 17.5-18%. A high-grade concentrate of 47.7% TiO_2 with a 67% recovery was abtained in a open circuit flotation (one roughing and two cleaning operation), using solely sulfuric acid as pH regulator.

对浮选攀枝花钒钛磁铁矿的磁选—浮硫化物后的尾矿—即试料(粒度为—0.315毫米、含TiO_2为17.5—18%)，除用硫酸调整pH外，在不需添加其他调整剂的情况下，经一次粗选二次精选就可获得含TiO_247.7%、收率为67%的高品位钛精矿。

As catalyst, the tungstosilicic and phosphato-tungstic acids have similar catalytic activities which are six times more than that of sulfuric acid in the same reactive conditions.

钨硅酸和磷钨酸具有相似的活性活性，在同样条件下，其速度常数均为硫酸的六倍，其选择性为硫酸的3倍。

The costuslactone and dehydrocostuslactone in the supercritical CO 2 extract of aucklandia were identified by TLC using a mobile phase of petroleum ether,ethyl acetate and benzene (70∶5∶15) and the colour developing reagent of 5% vanillic aldehyde dissovled in sulfuric acid.

用薄层色谱法，以ψ(石油醚∶乙酸乙酯∶苯)=70∶5∶1 5为展开剂，质量分数为 5 %香草醛硫酸为显色剂对木香超临界萃取物中的木香烃内酯与去氢木香内酯进行鉴别；并建立高效液相色谱法同时测定木香烃内酯与去氢木香内酯的含量方法。

Methods Xanthydrol coloring method,sulfuric acid coloring method,and HPLC method were developed for determination of the release of dirithromycin enteric-coated tablets.

分别采用口占吨氢醇显色法、硫酸显色法以及高效液相色谱法测定地红霉素肠溶片的释放度，对每种方法进行方法学的研究和验证。

An alcohol solution containing 10% sulfuric acid was used for colouration in the way of sprayin.

结论该方法准确、简便，可为白术的目的建立白术薄层色谱鉴别方法。

The seed were soaked in hot water under respective temperatures of 50℃, 60℃ and 70℃; soaked by concentrated sulfuric acid respectively for 5min, 10 min, 15 min and treated under ultra low temperature for 2 min, 5 min and 8 min; Then burgeoned under 15℃.

以12份从不同地区采集的达乌里胡枝子种子作为试验用种，采用不同温度(50℃、60℃、70℃)热水浸泡、浓硫酸(5min、10min、15min)浸种和液氮(2min、5min、8min)对种子进行硬实处理，在15℃温度下进行发芽试验。

While chromium may stably exist in either the passive or active state, small amoullt additioll of palladium significantly increases the corrosion resistance of chromium plating in deaerated 5% and 20% sulfuric acid solutions in consequence of spontaneous passivation.

极化曲线和阻抗频谱测定表明，在相应铬镀层处于活化－钝化过渡的电位区间，含钯镀层都表现出净阴极电流；活化溶解与钝化过程随电位的相对发展变化可由低频段容抗圈的演变来推定。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。