丁烷

A selective and mild PS-DIB/ionic-liquid immobilized TEMPO catalytic oxidation procedure of alcohols to the corresponding aldehydes and ketones in ionic liquid BF4 at room temperature was developed. The oxidant PS-DIB was prepared via Iodation and acetylation of polystyrene resin. For the preparation of the ionic-liquid immobilized TEMPO catalyst, 4-(2,2,6,6-Tetramethyl-1-oxyl-4-piperidoxyl)butyl bromide was first synthesized from 2,2,6,6-tetramethyl-piperidin-4-ol-N-oxyl and 1,4-dibromobutane.

将聚苯乙烯树脂先碘化再乙酰基化，制得了负载型二乙酰氧碘苯(diacetoxyiodo polystyrene，PS-DIB)作为氧化剂。2，2，6，6-四甲基-N-氧自由基哌啶醇(2，2，6，6-tetramethyl-piperidin-4-ol-N-oxyl，TEMPO)与1，4-二溴丁烷反应生成4-溴丁氧基-2，2，6，6-四甲基-哌啶-1-氧化物，再与N-甲基咪唑发生季铵化反应，生成的溴化季铵盐与四氟硼酸钠进行离子交换制得氟硼酸型2，2，6，6-四甲基-N-氧自由基哌啶负载离子液体TEMPO-IL。

The influence of α-Sb_2O_4 content on selective oxidation of isobutane was evaluated.

探讨了催化剂中助剂α- Sb2 O4含量对异丁烷选择性催化氧化的影响。

The selective oxidation of isobutane to methacrylic acid is one of the most complex processes in partial oxidation of alkanes.

异丁烷选择氧化制甲基丙烯酸是烷烃选择氧化工艺中反应历程较复杂的过程之一。

The selective oxidation of isobutane to methacrylic acid is one of the most complex processes in partial ox...

异丁烷选择氧化制甲基丙烯酸是烷烃选择氧化工艺中反应历程较复杂的过程之一。

Several catalytic systems have been reported for the direct oxidation of isobutane.

文献中已报道了多种催化剂体系对异丁烷直接氧化制MAA表现出较好的反应活性。

Utilization reasonably of abundant isobutane resource in China.

指出我国应大力合理开发利用丰富的异丁烷资源。

Isobutane occurs in crude oil and natural gas, except biogenic gas.

异丁烷存在于原油和天然气中。

The incorporation of H〓 can increase the conversion of isobutane.

在反应气中引入H〓，可提高异丁烷转化率。

There is more methane,ethane, isobutane and isopentane in shaly limestone than in marlite.

泥灰岩比纯灰岩所产气体中含有更多的甲烷、乙烷、异丁烷和异戊烷。

Isobutane has a specific gravity of 0.56, a boiling point of 11°F at 14.7 psi, a vapor pressure of 72 psia at 100°F, a critical temperature of 275°F, and a critical pressure of 529 psia.

异丁烷的相对密度为0.56，在14.7磅/平方英寸压力下的沸点为11°F，在100°F温度下的蒸气压力72磅/平方英寸，临界温度为275°F，临界压力为529磅/平方英寸。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。