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- A new bimetallic basicity catalyst used for synthesis of methyl isobutyl ketone from acetone and hydrogen. 制备了常压下丙酮与氢气合成甲基异丁基酮的双金属碱性催化剂,并测定了其反应活性。
- A hydrocarbon, C6H3(CH3)3, occurring in petroleum and coal tar or synthesized from acetone and used as a solvent. 三甲苯一种碳氢化合物,化学式为C6H3(CH3)3,能从石油和煤焦油中提取或用丙酮合成,被用作一种溶剂
- The principal factors affecting the grading process for the recrystallization of RDX from acetone are given through the orthogonal test. 通过正交试验,给出影响RDX丙酮重结晶粒度分级工艺的主要因素。
- Furfurylidene acetone obtained from acetone and furfuratdehyde by condensationwas used as a brightener in an acid-sodium chloride type Zn electroplating bath. 由丙酮和呋喃甲醛经缩合反应所制得的呋喃叉丙酮,用作酸性氯化钠型镀锌的光亮剂。
- Sevoflurane is synthesized from aceton by vapor phase catalytic fluorination, vapor phase catalytic hydrogenation,chloridization and fluoromethylation, which gives a new synthetic method. 以丙酮为原料,经氯化、气相氟化、气相氢化及氟甲基化等一系列改进的方法合成了七氟醚,提供了一条新的合成路线。
- She read me a few extracts from her own new novel. 她把她自己的新小说念了几段给我听。
- She will not veer from her brave new intentions. 她不会改变她的大胆的新计划。
- Carbon tetrabromide was prepared from acetone and sodium hypobromite by adding tetrabutylammonium bromide.The yield and purity were very satisfactory. 向次溴酸钠溶液中滴加适量的丙酮,在四丁基溴化铵催化下,高产率得到四溴化碳。
- He catch the redeye from los angel to New York. 他赶上从洛杉矶到纽约的夜航班机。
- Synthesis of 1, 3, 5-trimethylbenzene from acetone, 1, 2, 4-trimethylbenzene or 1, 2, 3-trimethyibenzene has been reviewed. 15 references are presented. 介绍了由丙酮、偏三甲苯及连三甲苯合成均三甲苯的反应。参考文献15篇。
- From that time on I gained a new life. 那时起我获得了新生。
- The new process extracts oil from shale. 这一新过程可从页岩里提炼出石油。
- I got a new coat in that store last week. 上礼拜我在那家店买了一件新外套。
- The results of spectra showed that the stereocomplex was formed for the films ca st from acetone and benzene solutions with the appearance of the characteristic bands for the stereocomplex. 结果表明无规聚甲基丙烯酸甲酯在丙酮和苯中确能形成立构复合结构,结构的形成主要是依靠分子链中间规和等规链段的相互作用。
- The new chairman will shake up the company. 新任董事长将改组这家公司。
- Objective To prepare reference substance for quality control of Arnebia euchroma.Caffeic acid tetramers was extracted and separated from acetone water extraction of Arnebia echroma. 目的从新疆软紫草的丙酮水提取物中分离制备了咖啡酸四聚体对照品。
- We shall go from London to Washington via New York. 我们将从伦敦经过纽约到华盛顿。
- They all cooed over the new baby. 他们对着新生婴儿爱抚地轻声细语。
- The new law takes effect from tomorrow. 新法令明日起实行。
- It is a long distance from New York to Hongkong. 纽约离香港很远。
- 今日热词
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- 深远海浮式风电平台 - deep-sea floating wind power platform
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- 京雄高速公路 - Beijing-Xiongan expressway
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- 农业及相关产业增加值 - the added value of agriculture and related industries