异丁

The course of thermal reaction for iso-butyl mercaptan, di-n-butyl sulfide and di-n-butyl disulfide is free radical mechanism.

对于异丁硫醇、丁硫醚、丁基二硫化物的热反应，其热转化的途径是自由基机理。

Catalysts in three synthesis routes,the hydroxylation of 4-tert-butyl-phenol,the alkylation of pyrocatechol by tert-butyl alcohol and the alkylation of pyrocatechol by isobutene,were discussed in detail in terms of reaction conditions,catalysts,temperature,reaction time etc.

论述了对叔丁基苯酚羟基化法、邻苯二酚与叔丁醇烷基化法和邻苯二酚与异丁烯烷基化法生产对叔丁基邻苯二酚的合成路线的催化剂。

Analysis of the treated aqueous solution was conducted with GC-MS,and the main intermediates during phenol degradation were isobutyric acid,malonic acid,benzoquinone,butenoic acid,oxalic acid,maleic acid,succinic acid,hydroquinone,catechol and resorcin.

利用GC-MS分析了苯酚降解主要中间产物为异丁酸、丙二酸、对苯醌、丁烯酸、乙二酸、顺丁烯二酸、丁二酸、邻苯二酚、对苯二酚及间苯二酚等，并据此推测了苯酚电催化氧化的可能反应途径。

The experimental results show that using the feed technique of "starved state" can raise the conversion ratio of monomers, shorten the reactive time and get polymers with much more even distribution of molecular weight; the technique of adding azobisisobutyronitrile as an initiator first and then benzoperoxide as another initiator at later Stage of experiment can get higher initiating efficiency than using one initiator only.

结果表明：采用&饥饿态&聚合工艺可提高单体转化率，缩短反应时间，且所得到聚合物相对分子质量分布均匀；选用偶氮二异丁腈和过氧化笨甲酰两种引发剂进行复配，比选用单一引发剂的引发效果好；选用酯酸丁酯、正丁醇和丙二醇甲醚丙酸酯作混合溶剂，当配比为2：1：1时聚合体系稳定，聚合物的固体质量分数可达70%，且粘度适中。

The volatile components were separated and identified using GC-MS technique. RESULTS Seven ingredients were. isolated: 2-ethyl-hexyl-adipate (66.5%), 1-methoxy-4-(1-propenyl)benzene (12.5%), isopropyl isothiocyanate (6%), isobutylisothiocyanate (6%), 6-methyl-5-heptene-2-one (3.5%), benzaldehyde (1.4%), phenylacetaldehyde (0.8%).

结果 分离出7个成分，采用峰面积归一化法确定了各成分的相对含量，分别为66.5%双－2-乙基己基－己二酸、12.5%1-甲氧基－4-（1-丙烯基）苯、6%异硫氰酸异丙酯6%、6%异硫氰酸异丁酯、3.5%6-甲基－5-庚烯－2-酮、1.4%苯甲醛、0.8%苯乙醛。

The catalytic performance of the synthesized molecular sieves, modified by Pd or Pt, for isomerization and dehydroisomerization of n butane was investigated. Pd/SAPO 11 catalyst showed the highest selectivity in...

结果表明，载 0 3%Pd的SAPO 11分子筛催化剂具有最高的丁烷异构化选择性，而在丁烷一步异构脱氢反应中，含金属杂原子的催化剂具有更高的异丁烯选择性。

The studies found that compatibility between ZDDP and succinimide dispersants primarily depended upon active α-amino-group content in succinimides. The active α-amino-group content was affected by the alkylation and amination processes, and also affected by the structure of polyisobutylene in succinimides.

研究结果表明，丁二酰亚胺与 ZDDP 的相互作用主要取决于丁二酰亚胺中活泼的伯胺氮含量，而伯胺氮含量则决定于丁二酰亚胺在生产中的烃化、胺化工艺和聚异丁烯基的结构。

The result of study shows: The best petrol of methanol helps solvents to be alcohol of different cube - compound medicine which Kazakhstan SW17-MTBE makes up, its matching is: The different man's alcohol content is 0.1%, Kazakhstan SW17 content is 0.2%, MTBE is 10%.

研究结果表明：最佳的甲醇汽油助溶剂是异丁醇-哈SW17-MTBE组成的复合剂，其配比是：异丁醇含量为0.1%，哈SW17含量为0.2%，MTBE为10%。

The dehydrogenation of vapor phase methyl isobutyl carbinol to produce methyl isobutyl ketone over a CuO-ZnO-Al2O3 catalyst prepared by co-precipitation method under the atmospheric pressure was studied.

采用共沉淀法制备的铜系CuO/ZnO/Al_2O_3脱氢催化剂，在常压下进行了甲基异丁基甲醇的气相脱氢制备甲基异丁基酮的反应实验。

Ethane＞ toluene＞1, 3, 5-trimethylbenzene＞methyl isobutyl ketone＞1, 4-Dioxane＞isoprene＞ 1, 2, 4-trimethylbenzene＞cyclohexane＞1, 3-Butadiene＞methyl butyl ketone were the most reactive VOC species in PRD.

化学活性排名前十位的化合物为：乙烯＞甲苯＞1，3，5-三甲苯＞甲基异丁基酮＞1，4-环氧乙烷＞异戊二烯＞1，2，4-三甲苯＞环己烷＞1，3-丁二烯＞甲基丁基酮。

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。