Manufacturing technique of wax microcrystalline : with crude oil vacuum residua fractions as material, it is made from propane taking off asphaltum, furfural refining, ketone benzene taking off oil, and argil refining
微晶蠟的生產工藝流程:本產品以天然原油的減壓渣油為原料,經丙
烷脫瀝青、糠醛精製、酮苯脫油、白土補充精製及加氫補充精製冷卻后成型而制得該
系列產品。
Enantioselective borane reduction of prochiral ketones catalyzed by s - indolin - 2 - yl methanol or - indoline - 2 - carboxylic acid enantioselective borane reduction of prochiral ketones catalyzed by
硼
烷體
系中吲哚醇或吲哚酸催化的前手性酮的不對稱還原
As to the solvent, hexane and butvul acetate is discussed and former is more suitable for biotransformation. among seven kinds of energy source : menthok alcohok glycok glycerou 1 - hexanok butyl alcohol octyl alcohol, glycol is selected as energy source, so hexane - glycol is used as reaction system
從生物相容性和有利於轉化的角度對兩種溶劑,正己
烷和乙酸丁酯進行了比較,確定了正己
烷?憶二醇為該模型反應的溶劑體
系。
Cyclohexane and caprolactam, a profitable future partnership
環己
烷和己內酰胺,未來的互利關
系?
We can see from the photos of the sem that the diameters of the powers of this tree land of materials obtained by the system of trion x - 100 / caprylic alcohol / cyclohexane / water are about 20 nm. by means of uv - vis, atomic absorption spectrometry and so on, nanoparticles of this three kind of anode materials are synthesized
利用trionx - 100 /正辛醇/環己
烷/水反膠束體
系制備出三種物質的粉體,掃描電子顯微鏡照片顯示粒子的粒徑在20nm左右,分佈均勻;此外還利用uv - vis 、原子吸收光譜等測試手段,都表明合成出了三種正極材料的納米粒子。
Petroleum products - fuels - determination of octane number, cetane number and calculation of cetane index
石油產品.燃料.辛
烷值十六
烷值的測定和十六
烷指
系數的計算
Diazaspiro [ 4. 4 ] nonane was synthesized from malononitrile as the starting material by a series of nucleleophilic displacement, hydrolytic cyclization and carbonyl reduction
摘要以丙二腈為原料,經過親核取代、水解環合、羰基還原
系列反應,合成了2 , 7 -二氮螺[ 4 . 4 ]壬
烷。
A new convenient synthesis of a series of polyfluoroalkyl substituted cyclopropane derivatives was achieved by the reaction of polyfluoroalkyl iodides with diethyl allylmalonate in the presence of sodium dithionite in 45 % ~ 55 % yields
摘要以連二亞硫酸鈉為引發劑,烯丙基丙二酸二乙酯與多氟
烷基碘代
烷在溫和條件下反應,方便地得到一
系列多氟
烷基取代的環丙
烷衍生物,產率45 % ~ 55 % 。
A study on cr ceo2 catalysts and their catalytic performance for dehydrogenation of ethane
2體
系及其對乙
烷脫氫反應催化性能的研究
Ethylidene povidone series product pvp - i
聚乙烯吡咯
烷酮
系列產品pvp - p
系列
Pvp polyvinyl pyrrolidone series products pvp - p series ethylidene povidone series product pvp - i
聚乙烯吡咯
烷酮
系列pvp - p
This article choosed out organic phase change materials, and, the solid - liquid - equilibrium of eleven binary system including fatty alcohol / fatty acid, n - octadecane / fatty acid, n - octadecane / fatty alcohol system were determined by cooling curve, and, t - x phase diagrams of these systems were drawn. the result shows that all these systems are simple eutectic, at the same time, the entropy of phase change of every system in the eutectic point is determined by using differential scanning calorimetry ( dsc ). and n - octadecane / fatty acid systems were calculated theoretically
本文初選出部分有機相變貯能材料,採用步冷曲線法測定了12醇-羧酸
系列、 18
烷-羧酸
系列、 18
烷- 12醇體
系共11組體
系的二元固液相平衡關
系,繪制了這11組體
系的t - x相圖,測定結果表明,這幾組體
系均為簡單低共熔體
系;同時利用差熱掃描量熱法( dsc )對上面各組體
系低共熔點處的相變焓進行了測定;並對18
烷-羧酸
系列進行了熱力學理論預測。
R" is a replaceable function, e. g. acetoxy, methoxy, their acyloxy and alkoxy homologs or halo.
R」是取化基,如乙氧基、甲氧基及它們的環氧和
烷氧同
系物或鹵基。
Propane is said to be related to these other members of the family in a homologous sense.
就同
系列的意義而言,可以說丙
烷是與本
系列的其他成員相關連的。
Ketones are named by the iupac system as derivatives of the class name for this homologous series, " alkanones.
在iupac
系統中,酮是作為這個
系列的類名? ? 「
烷屬酮」的衍生物來命名的。
Study on isobaric vapor - liquid equilibrium for vinyltrichlorosilane vinyltrimethoxysilane binary system
乙烯基三甲氧基硅烷二元體系等壓汽液平衡研究