烯烃

The polymerization conditions influenced the activity and distribution ofα-olefins.

聚合条件对乙烯齐聚活性及α-烯烃分布的影响很大。

They may also be converted to ether s and olefins.

醇又能转化为醚和烯烃。

Recent advances in heterogeneous catalyst s of ethylene oligomerization to α-olefins is summarized.

综述了国内外近几年乙烯齐聚制α-烯烃多相催化剂的研究进展。

Additionally, the C4 and heavier olefins may be hydrogenated.

另外可以使C4和更重的烯烃加氢。

PAO can be obtained by mixing two kinds of olefines which have different average carbon in proportion with variance analysis.

充分了解到裂解烯烃的平均碳数分布对产品的粘度指数和凝点的显著性影响。

Experience of process plants could include gas processing, ammonia, methanol, hydrogen, olefines sulphur, polyethylene, and polypropylene.

具备工艺装置经验包括天然气工艺、氨、甲醇、氢、烯烃、硫、聚乙烯、聚丙烯等。

Provide technical support and expertise relative to Olefins and Nitriles products to the Commercial Team and other departments as needed together with lab TS people.

与实验室技术服务人员共同为商务部和其他部门提供所需要的有关烯烃产品和腈类产品的技术支持和专业知识。

The results indicate the mutual effect exists between the single coals, which could increase the maximum of thermal weight loss obviously and has a small effect on the temperature extent of the weight loss. The main pyrolysis production of coal is coke, but the main production of waste plastics is tar; the yield of water became decrease and the gas became increase by adding the waste plastics. And the CRI and CSR decreased with the ratio of waste plastics in coal. The main ingredients of tar from blend coal are aromatic hydrocarbon and alkane, while those of waste plastics are alkane and alkene. The result of co-coking with coal and waste plastics make the light tar and the aromatic hydrocarbon increase obviously. The combustible ingredient(CO、H2、CH4) of gas from co-coking with coal increase at different ratio; Co-coking with coal and waste plastics could increase the combustible ingredient and thermal value of gas.

结果表明，废塑料与煤混合物在煤的塑性温度区间内存在明显的相互作用，使最大热解失重峰迁移，热解速率变大，且随着废塑料配比的增加呈现规律性的变化；煤热解产物固体焦炭为主，而废塑料的热解产物以焦油为主，废塑料的添加使得总体焦炭和水产率下降，焦炉煤气和焦油的产率增加，即共焦化呈现出明显的&增油减水&效应；随着塑料添加量的增加，焦炭热强度呈现劣化趋势；废塑料代替瘦煤配煤炼焦可使其比例提高到3%而不影响焦炭的质量；纯煤焦化所得焦油以芳香烃类和烷烃类为主，而废塑料热解焦油以烷烃和烯烃为主；废塑料配煤炼焦，可使得的焦油呈现&环构化&和&轻质化&趋势；废塑料的添加可使煤气中的可燃组分(CO、H2、CH4)的含量均有不同程度的增加；废塑料配煤炼焦可以优化焦炉煤气的组成，增加煤气中的可燃组分，提高焦炉煤气的热值。

It is caused by the property change of feed stock in storage process and alkadiene polymerization.

造成这一问题的主要原因，是原料油性质在存储过程中发生变化、二烯烃发生聚合。

As the quality of 8B and 20# aviation engine oils from soft wax cracking is unstable and product yield is low, the semi-refined wax was used as feedstock of optimized cracking process to produce C5～13 normal alpha olefins, which are synthesized to yield the base oil of 8B and 20# aviation engine oils.

针对8B和20号航空润滑油产品质量不稳定、产品收率低等难题，在优化裂解工艺的基础上，以半精炼蜡裂解生产的C5～C13正构α-烯烃为原料，同时合成8B和20号航空润滑油。

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。