查询词典 dehydrating agent

The optimum synthetic conditions of ethyl chloroacetate are: molar ratio of chloroacetic acid to ethanol is 1:8, the quantity of catalyst[Fe2(SO4)3 xH2O] is 10% of the mass of chloroacetic acid, reaction time is 1 hour, 5A zeolite was used as dehydrating agent. In these conditions, the yield of ethyl chloroacetate was up to 73%.

用Fe_2(SO_4)_3·xH_2O作为催化剂合成氯乙酸乙酯的较佳反应条件是：酸醇物质的量之比为1：8，催化剂用量为氯乙酸质量的10％，以5A分子筛作为脱水剂，回流时间1h，收率达73％以上。

CNTs were first pre-treated using acid solution (HNO3) to obtain CNTs functionalized with carboxylic groups. Subsequently, the stearyl alcohol was grafted onto CNT with the assistance of dehydrating agent, N,N'-dicyclohexyl-carbodiimide. Excellent dispersion in organic solvents such as acetone, THF, and chloroform was found for the modified CNTs (CNT-C18). In addition, the PBS/CNTs nanocomposites were then prepared through simple melt-blending. Mechanical properties, thermal behavior, conductivity of resultant polymer/CNT composites were investigated. The results show that excellent dispersion of nanotubes in the PBS matrices was achieved.

为了增加多壁奈米碳管在复合材料中的分散性，将碳管表面进行化学修饰，首先将多壁奈米碳管浸入HNO3溶液中，进行酸化，使碳管表面带有羧酸的官能基，然后再加入十八烷醇，在温和的条件下，藉由N，N'-二环己基碳二亚胺(N，N'-dicyclohexyl- carbodiimide，DCC)脱水剂脱水，使碳管和十八烷醇之间产生酯基的化学键结，改质后的碳管可以分散在acetone、THF、chloroform…等有机溶剂中，结果显示成功的利用DCC脱水剂完成碳管的改质。

It is also an oxidizing (see oxidation-reduction) and dehydrating agent and chars many organic materials.

也是一种氧化剂和脱水剂，能碳化许多有机物。

Coffee and traditional teas contain caffeine, which produces increased urine output and is therefore a dehydrating agent.

含有咖啡因的咖啡和茶叶的传统，生产增加尿量，因此，是一个脱水剂。

Methane is used as the selective dehydrating agent for the production of 2,3,3,3-tetrafluoro-l-propene (R1234yf) from 2,2,3,3,3-pentafluoro-l-propanol.

使用甲烷作为选择性脱水剂由2，2，3，3，3-五氟-1-丙醇制备2，3，3，3-四氟-1-丙烯(R1234yf)。

Amide dehydrating agent in the presence of careful heating, can be transformed into nitriles.

酰胺在脱水剂存在下小心加热，可转变为腈。

Glacial acetic acid is a dehydrating agent and an irritant and is corrosive.

冰醋酸是个脱水代理及刺激物和腐蚀。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。