辛烷值

A new prediction method for octane number of acyclic alkanes is proposed.

提出了一种采用基团组成和拓扑指数分别描述分子的化学组成和结构信息，进而预测烷烃辛烷值的方法。

Hard alkane value is a ruggedized index which shows the petrol at the time of burning in the petrol machine.

辛烷值是表示汽油在汽油机中燃烧时的抗震性指标。

When the mol quantity of Cu2+ dissolved was 5% of those of AlCl3 in ionic liquids, alkylation results from ionic liquids is comparable with those obtained with concentrated sulfur acid: the yield of alkylate reaching 178% of the volume of butene inputted, the selectivity of C8 reaching 75% and the octane number of alkylate reaching 92.2.

溶入Cu2+和Cu+后，离子液体的催化性能有显著的改善，当Cu2+的摩尔加入量为三氯化铝的5%时，烷基化油收率达到丁烯体积的178%，对C8的选择性为75%，烷基化油辛烷值为92.2，并且离子液体可以重复使用。

This paper discusses the blending effect of methanol with straight-run gasoline, alkylate, catalytic cracked gasoline and reformate on octane number, saturated vapor pressure, compatibility and stability of the blended stocks.

本文论述了甲醇与直馏汽油、烷基化油、催化裂化汽油以及催化重整汽油调合时的辛烷值调合效应、饱和蒸气压调合效应，以及调合油的相溶性、稳定性。

Alkylation of isobutane with butene is an effective method to producehigh-octane gasoline.

异丁烷与丁烯烷基化是生产高辛烷值汽油的有效方法。

Through research, MTBE is a good high-octane level of gasoline additives and antiknock.

通过研究，甲基叔丁基醚是一种良好的高辛烷值汽油添加剂和抗爆剂。

Gasoline antiknock of its chemical composition related to China's adoption of motor determination and use octane as an indicator.

汽油的抗爆性与其化学组成有关，中国采用马达法测定，并用辛烷值作指标。

Synthesis, Characterizations and Gasoline Antiknock Properties of Transition Metal Complexes

在环保和节能的推动下，必须有更经济高效的无铅化汽油抗爆剂来满足人们对高辛烷值汽油的需求。

Test results of oil-solubility and corrosiveness indicate that both products are suitable asexcellent gasoline antiknock agents.

油溶性和腐蚀性试验结果表明，产品2，2，6，6-四甲基-3，5-庚二酮铈符合要求，适宜作为汽油辛烷值改进剂。

The experimental results showed that reaction temperature and space velocity had remarkable influence on aromatization of light hydrocarbons.

考察了反应温度、空速和高径比条件对轻烃在分子筛催化剂上低温芳构化制取高辛烷值汽油性能的影响。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。