查询词典 anhydrous

Naphthalene acetyl chloride was prepared firstly by the reaction between α-naphthylacetic acid and SOCl2 in anhydrous benzene,then reacted with potassium thiocyanate to obtain α-naphthalene acetyl isosulfocyanate,as taking an addition reaction with p-chloro benzoyl hydrazine the novel compound N-naphthalene acetyl-N'-p-chloro benzoylamino thiocarbamide was finally synthesized.

通过α-萘乙酸和SOC l2在无水苯中反应制得α-萘乙酰氯，然后与硫氰酸钾反应生成α-萘乙酰基异硫氰酸酯，再与对氯苯甲酰肼进行加成反应，生成新型化合物N-萘乙酰基-N'-对氯苯甲酰氨基硫脲。

Naphthalene acetyl chloride was prepared firstly by the reaction betweenα-naphthylacetic acid and SOCl2 in anhydrous benzene, then reacted with potassium thiocyanate to obtainα-naphthalene acetyl isosulfocyanate, as taking an addition reaction with p-chloro benzoyl hydrazine the novel compound N-naphthalene acetyl-N'-p-chloro benzoylamino thiocarbamide was finally synthesized.

通过α-萘乙酸和SOCl2在无水苯中反应制得α-萘乙酰氯，然后与硫氰酸钾反应生成α-萘乙酸基异硫氰酸酯，再与对氯苯甲酰肼进行加成反应，生成新型化合物N-萘乙酰基－N'-对氯苯甲酰氨基硫脲。

Chloro-2-hydroxypropyl trimethylammonium chloride was synthesized by using trimethylamine hydrochloride and epichlorohydrin as the raw materials and anhydrous as solvent.

以无水乙醇作溶剂、三甲胺盐酸盐和环氧氯丙烷为原料合成了3-氯-2-羟丙基三甲基氯化铵，探索出最佳合成条件为：n∶n为0.95∶1，反应温度为40~50℃，反应时间为30m in，所得产品质量分数大于98%，收率达90%。

Anhydrous alcohol and glacial acetic acid were used as component solvent, which the volume ratio was 2:1, zinc dust as reductant, reaction temperature was 25~35℃, reaction time was 2 h, the yield was 81%.

在还原反应中采用无水乙醇和冰醋酸的混和溶剂，两种溶剂的体积比为2：1，以锌粉为还原剂，反应温度为25~35℃，反应时间为2h，产率为81%。

Eight novel N,N′-naphthalene acyl substituted aromatic acylamino thiocarbamides(Ⅱ1~Ⅱ8) were synthesized from aryl acylhydrazine and α-naphthalene acyl isothiocyanate, which was obtained by the reaction of potassium thiocyanate with α-naphthalene acyl chloride obtained from 2-naphthylacetic acid and thionyl chloride in anhydrous benzene.

通过α-萘乙酸和SOCl2在无水苯中反应制得α-萘乙酰氯，与硫氰酸钾反应生成α-萘乙酰基异硫氰酸酯，再与芳基酰肼进行加成反应，合成8种新型N，N′-萘乙酰基取代芳乙酰胺基硫脲类化合物(Ⅱ1～Ⅱ8)。

Taking natural anhydrate(anhydrous gypsumⅡ) as major raw material,adding composite activator for modification to adjust setting time,flexural strength and compression strength,then mixed and milled with proper amount of composite water-retention agent,fly ash and air entraining agent to obtain plastering gypsum .

以天然硬石膏为主要原料，掺加复合激发剂进行改性处理，调节凝结时间及抗折、抗压强度，然后辅以适量复合保水剂、粉煤灰掺合料、引气剂等，磨细混匀后即得到抹灰用的粉刷石膏。

The content of arsenic in the anhydrous sodium arseniate product reached to 24%.

产品锑酸钠中锑含量在40％左右，碳酸钠中砷含量小于1.5％，砷酸钠中砷含量在24％以上。

Anhydrous sodium arseniate was got after stirring the liquid for 3 h at 55℃.

以锑精炼产生的含砷9％、含锑2％、含碱40％左右的二次砷碱渣为原料，在液固比为3：1、90℃以上搅拌浸出3h，过滤后得到砷锑渣和浸出液。

Analog calculation of azeotropic rectification tower in the process of anhydrous alcohol was done.

对无水酒精恒沸精馏工艺中恒沸精馏塔进行模拟计算。

The chlorinating mechanism of cerium dioxide was investigated by chlorinating CeO2 with NH4Cl and thermal analysis, which is meaningful for chlorinating RE minerals such as bastnasite by NH4Cl and preparing anhydrous RE chloride.

通过考察反应温度、时间及NH4Cl用量对CeO2氯化的影响以及CeCl3*7H2O的热分解行为的研究，对CeO2的氯化机制进行了探讨。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷