olefins
推荐文章
n.
烯烃；链烯；
英英释义
olefin
n.any unsaturated aliphatic hydrocarbon
同义词：alkeneolefine
双语例句
Plants are sensitive to the simple olefins, particularly C2H4.
植物对简单烯烃是敏感的特别是乙烯。
With the higher olefins, stabilization of the energetic intermediates occurs more easily.
在较高的烯烃情况下，高能的中间物稳定作用更易出现。
权威例句
Catalytic Asymmetric Aminohydroxylation (AA) of OlefinsCOMPONENTS AND CATALYSTS FOR THE POLYMERIZATION OF OLEFINS
Living Polymerization of α-Olefins Using Ni II −α-Diimine Catalysts. Synthesis of New Block Polymers Based on α-Olefins
Efficient proline-catalyzed Michael additions of unmodified ketones to nitro olefins.
Facile catalyst separation without water: fluorous biphase hydroformylation of olefins
New Pd(II)- and Ni(II)-Based Catalysts for Polymerization of Ethylene and .alpha.-Olefins
ChemInform Abstract: Enantioselective Epoxidation of Unfunctionalized Olefins Catalyzed by (Salen)manganese Complexes
ChemInform Abstract: Rhodium(I)‐Catalyzed Hydroboration of Olefins. The Documentation of Regio‐ and Stereochemical Control in Cycl...
ChemInform Abstract: Bis(oxazoline)‐Copper Complexes as Chiral Catalysts for the Enantioselective Aziridination of Olefins
Iron-Based Catalysts with Exceptionally High Activities and Selectivities for Oligomerization of Ethylene to Linear α-Olefins
1. The first part of this thesis is about the oxidation of olefins catalyzed by AuCl.
本论文第一部分的内容为均相金催化剂在烯烃氧化反应中的应用。
www.dictall.com
2. The results have shown that the selectivities are good for all substrates and the yields are satisfactory for olefins and halides in this way.
试验结果表明，上述底物用这种新方法进行羰基合成，反应的选择性好，其中烯烃和卤代烃的收率也较高。
www.chemyq.com
3. Metallocene ligands, metallocene compounds and metallocene catalysts, their synthesis and their use for the polymerization of olefins.
金属茂配体，金属茂化合物和金属茂催化剂，它们的合成以及它们用于聚合烯烃的用途。
ip.com
4. Light olefins for industrial use. Determination of impurities by gas chromatography. General considerations.
工业用轻烯烃。用气相色谱法测定杂质的含量。一般考虑。
www.kuenglish.info
5. The development and application of the asymmetric epoxidation of olefins catalyzed by chiral ketones derived from fructose were reviewed with 34 references.
综述了果糖衍生的手性酮催化烯烃不对称环氧化反应的发展及应用。参考文献34篇。
www.chemyq.com
6. Many new compounds can be obtained by addition with water, hydrogen, alcohols, phenols, amines, amides, carboxylic acids, olefins, aldehydes, ketones, esters, etc.
与水、活性氢、醇、酚、胺、酰胺、羧酸、烯烃、醛、酮、酯加成得到的新化合物，可作脱水剂和氧化剂使用。
dict.cnki.net
7. Catalytic cracking of olefins features simplicity in operation and low cost, and should be developed in preference.
烯烃催化裂化技术具有操作简单和成本低廉等优势，应加快研究开发。
www.chemyq.com
8. Refinery gases vary in composition but consist largely of hydrocarbons, both paraffins and olefins.
各种炼厂气的组成不同，但都含有大量烃类，包括各种烷烃和烯烃。
www.infopetro.com.cn
9. Experience for ISBL units could include large continuous processes such as gasification, coal processing, gas processing, ammonia, methanol, hydrogen, olefins, sulphur, polyethylene, polypropylene.
在ISBL装置（包括大的不间断流程）上有经验，例如气化，煤处理，气体处理，氨，甲醇，氢，烯烃，硫，聚乙烯，聚丙烯。
www.lietou.com
10. Polymers of propylene or of other olefins, in primary forms.
初级形状的丙烯或其他烯烃聚合物。
www.china-customs.com
11. In this paper, the carbonylation has been studied of olefins in different solvent systems.
本文研究了烯烃在不同溶剂体系中进行羰基化反应的规律。
danci.911cha.com
12. Change of mole selectivities of alkanes and olefins in products with reaction temperature was investigated.
考察了产物烷烃和烯烃的选择性随反应温度变化的关系。
dict.cnki.net
13. At the same reactive condition, HZSM-5 catalyst not only has a higher activity to removing olefins by aromatization than HL catalyst, but also has excellent active stability.
在两者反应条件一致的情况下，HZSM-5沸石催化剂不但具有较好的烯烃芳构化活性，同时还表现出了良好的活性稳定性。
dict.cnki.net
14. The chlorination in allylic position of olefins is an important transformation in organic synthesis.
烯烃的烯丙位氯化是制备化学中间体的一个重要反应。
danci.911cha.com
15. Petroleum products. Determination of bromine number of distillates and aliphatic olefins. Electrometric method.
石油产品。蒸馏和脂肪烯烃的溴数测定。测电法。
www.tdict.com
16. The each content of gum, total oxidation insoluble matters and olefins, etc, is decreased significantly by chemical treatment of coker diesel oil before hydro-refining.
对焦化柴油进行加氢精制前化学精制处理，可使焦化柴油中的胶质、氧化总不溶物、烯烃等含量大幅度降低。
dict.cnki.net
17. The verification of the model shows that the macrokinetic equation of etherification of tert-olefins and kinetic parameters can well describe the process of the etherification reaction.
通过对模型的验证表明，得到的叔碳烯烃醚化反应宏观动力学方程及动力学参数能较好的描述醚化反应过程。
dict.cnki.net
18. The hydrogen transfer reaction on the Y zeolite catalyst mainly takes place between gasoline olefins and naphthenes.
分子筛上发生的主要是汽油烯烃和环烷烃之间的氢转移反应。
dict.cnki.net
19. The development in the oxidation of olefins to ketones catalyzed by palladium compounds was reviewed.
本文系统地评述了钯配合物催化烯烃氧化合成酮类物质的研究进展。
www.dictall.com
20. Meanwhile, coke yield increase and octane number loss should be considered when reducing olefins through hydrogen transfer reactions.
同时，在加强氢转移反应减少烯烃时，还需考虑焦炭选择性变差和汽油辛烷值下降的问题。
dict.cnki.net
21. It was shown that the coking components of the flare gas were olefins, coking reactions were mainly influenced by temperature with little effect by pressure.
研究结果表明，火炬气的结焦是由其中的烯烃聚合引起，火炬气结焦受温度影响较大而受压力影响较小。
dict.cnki.net
22. Two parameters, olefincity and hydrogen transfer index, were built to express the content of olefins and the degree of hydrogen transfer reaction.
在此基础上，分别构造了两个表示烯烃含量大小和氢转移反应强弱的参数———烯烃度和氢转移指数。
www.chemyq.com
23. Hydroformylation of olefins with different functional groups as Well as the effect of Solvent are also investigated.
溶剂也有显著影响，溶剂甲苯的结果最好。还考察了几种官能团烯烃的氢甲酰化反应。
dict.cnki.net
24. In this paper, a kind of new catalysts for olefins hydroformylation was studied.
本论文研制了一种新型烯烃氢甲酰化催化剂。
dict.cnki.net
25. In this paper, a kind of new catalysts for olefins hydroformylation was studied.
本论文研制了一种新型烯烃氢甲酰化催化剂。
dict.cnki.net
26. The low-molecular-weight paraffins and olefins, as found in natural gas and refinery gases, and the simple aromatic hydrocarbons have so far been of the most interest because it is these individual species that can readily be isolated and dealt with.
迄今为止，人们最感兴趣的是从天然气和炼厂气中所得到的低分子量石蜡和稀烃，以及简单芳烃，因为这些物质能够进行迅速分离和处理。
-- 来源 -- 汉英 - 翻译参考
27. Plants are sensitive to the simple olefins, particularly C2H4.
植物对简单烯烃是敏感的特别是乙烯。
-- 来源 -- 英汉 - 辞典例句
28. With the higher olefins, stabilization of the energetic intermediates occurs more easily.
在较高的烯烃情况下，高能的中间物稳定作用更易出现。
-- 来源 -- 英汉 - 辞典例句
29. The article points out that the refining? chemical integration advantages should be exploited to the full via recovering the ethylene and light olefins in the refinery FCC and coking dry gas to increase ethylene output and reduce ethylene cost.
提出了应发挥炼油化工一体化优势,回收炼厂催化和焦化干气中的乙烯和轻烃,增加乙烯产量,降低乙烯成本。
-- 来源 -- dict.cnki.net
30. The hydrogenation of olefins affords an example where both heterogeneous and homogeneous catalyses are effective.
烯烃的加氢反应就是这样的一个例子，对它说来均相催化和多相催化都是有效的。
-- 来源 -- 英汉 - 辞典例句
31. Light olefins for industrial use-Determination of traces of sulfur-Oxidative microcoulometric method
GB/T11141-1989轻质烯烃中微量硫的测定氧化微库仑法
-- 来源 -- 英汉 - 翻译参考[网络]
32. The compounds are prepared by the epoxidization of dinitrofluoromethyl olefins with peroxytrifluoroacetic acid.
这种化合物，由二硝基氟甲基烯烃与过氧化三氟醋酸进行环氧化反应而得到。
-- 来源 -- 英汉 - 辞典例句
33. "Oxidation of primary alcohols yields aldehydes and (if taken further) carboxylic acids; oxidation of secondary alcohols, ketones. Tertiary alcohols break down on oxidation. Alcohols generally react with carboxylic acids to produce esters. They may also be converted to ethers and olefins."
一级醇可被氧化成醛和（如果进一步氧化）羧酸；二级醇可被氧化成酮。三级醇经氧化则分解。醇通常与羧酸反应形成酯。醇又能转化为醚和烯烃。
-- 来源 -- 英汉 - 翻译样例 - 自然
34. "Olefins may be classified by whether the double Bond is in a ring (cyclic) or a chain (acyclic, or aliphatic) or by the number of double Bonds (monoolefin, diolefin, etc.)."
有两种分类方法︰一、分为环烯烃和非环(链)烯烃,双键依次位于成环(死循环)碳原子之间或开链基团的碳原子之间。二、分为单烯烃、双烯烃和三烯烃等,每个分子中的双键数目依次为1、2、3......。
-- 来源 -- 英汉 - 翻译样例 - 自然
35. "Rare in nature, olefins are obtained by the cracking of petroleum fractions at high temperatures. The simplest ones (ethylene, propylene, Butylene, Butadiene, and isoprene) are the Basis of the petrochemicals industry."
烯烃在自然界很稀少,但在石油裂解(大分子降能)成汽油过程中可大量生成,低级的单烯烃(即乙烯、丙烯和丁烯)已成为庞大的石油化学工业的基
-- 来源 -- 英汉 - 翻译样例 - 自然
olefins
