The effects of propanedioic acid, succinic acid, hexanedioic acid, sebacic acid and oxalic acid on floatation performance of feldspar and quartz in dodecyl amine system were investigated.

In dodecyl amine system, oxalic acid can be as the effective modifier to float feldspar from quartz in dodecyl amine system at pH2.

草酸可以作为在十二胺体系中，在强酸性条件下，实现长石与石英的浮选分离的有效调整剂。

A synthetic method of amine oxide from dodecyl amine was introduced. The factors which influence the reaction and synthetic conditions of tertiary amine oxide were studied.

介绍了用十二胺合成氧化叔胺的方法，研究了叔胺及氧化叔胺的合成工艺条件和影响反应的因素。

Studies on Phase Structures of N, N-Dimethyl-n-dodecyl Amine/ Inorganic Oxyacid System

N，N-二甲基正十二烷基胺/无机含氧酸体系的相态结构研究

The results indicate that the DN 12 is a better cationic collector than the dodecyl amine.

结果表明：DN12的捕收性能优于十二胺；

Adsorption of sodium oleate and dodecyl amine hydrochloride on feldspar and quartz

油酸钠和十二胺盐酸盐在长石和石英表面的吸附

Nipagin esters were synthesized by the esterification of dodecyl and octadecyl alcohol with p-hydroxybenzoic acid in the presence of vitamin C.

以维生素C为催化剂，对羟基苯甲酸和十六醇及十八醇为原料合成尼泊金十六酯与尼泊金十八酯。

The kinetics of homogeneous phase dodecyl alcohol ethoxylation for alcohol ether synthesis has been studied in the presence of KOH catalyst with a continuous tubular reactor. A simplified kinetic model and the reaction rate constant were obtained.

利用连续管式反应器对以KOH为催化剂的均液相月桂醇乙氧基化反应合成醇醚的动力学进行了研究，获得了其简化的动力学模型和反应速度常数k。

Study on the preparation of methylacrylic dodecyl alcohol esters in the catalysis of cationic exchange resin

阳离子交换树脂催化甲基丙烯酸十二醇酯的合成研究

The cotton was falling in price on the international market and the buyers held off.

国际市场上,棉花价格正在下跌,买主们踟蹰不前.

But your father stands in the way because of certain unrealistic scruples.

但是你爸爸因为一些不切实际的清规戒律就踟蹰不前,阻碍了生意的前进.

Wireless technology is advancing by leaps and bounds-and there is much more to come.

无线技术正大步流星地向前跃进 ---- 而且会有更多的发展.

He walked along the path with great strides.

他在这条小路上大步流星地走着.

Then his pride was up, and he strode away and went outside.

这一下伤了他的面子, 于是他大步流星,来到外面.

Suddenly, he pulled up sharply in his stride, and fell to the floor.

突然，原本大步流星的他猛地停住了脚步，倒在了地上。

Different types of wastewater from dyestuff technology are treated by using modified clay adsorbent Y, which is modified from activated clay with cationic functional group ( dodecyl dimethyl benzyl ammonium chloride).

采用氯化十二烷基二甲基苄基铵改性后的改性黏土吸附剂Y处理不同类型的染料工艺废水。

Synthesis and Properties of Dodecyl Dimethyl Hydroxyethyl Ammonium Chloride

氯化十二烷基二甲基羟乙基铵的合成及性能

Experiment observation on properties of dodecyl dimethyl benzyl ammonium chloride

十二烷基二甲基苄基氯化铵性能的试验观察

The solubility, surface tension and critical micelle concentration of the anionic and cationic surfactant blend of dodecyl polyoxyethylene methylammonium chloride and dodecyl polyoxyethylene ether sulfate with different oxyethylene units were studied.

研究了十二烷基甲基聚氧乙烯氯化铵与脂肪醇聚氧乙烯醚硫酸盐复配体系在不同乙氧基化数的溶解性、表面张力及临界胶束浓度。

The results showed that the distance between layers of OMMT ( DK2) modified by bis-hydroxyethyl dodecyl trimethyl ammonium chloride was larger;

结果表明，经双羟乙基十二烷基三甲基氯化铵改性得到的OMMT（DK2）层间距较大；

In order to compare the efficacy of the disinfectant solution containing benzyl-di-( 2-hydroxyethyl) dodecyl ammonium chloride, the germicidal ingredient, in kil-ling microorganisms in suspension and on cloth strip, suspension and carrier quantitative germicidal tests were carried out.

为比较杀菌成分为苄基－双－（2－羟乙基）十二烷基氯化铵消毒液对悬液中与布片上微生物的杀灭效果，进行了悬液与载体定量杀菌试验。