十八烯

所得的CdS和Ag纳米晶由于表面的憎水包覆层而分散在十八烯相。

As-prepared CdS and Ag NCs were dispersed in the ODE phase due to their hydrophobic capping layers .

以NiSO4/γ-Al2O3为催化剂丙烯齐聚制十二烯和十八烯工艺的研究

New Method of Dodecene and Octadecene Production by Propene Oligomerization over NiSO_4 / γ - Al_2O_3 Catalyst

根据本工艺提取的蜂胶经GC-MS检测，检测结果表明所提蜂胶中含有192种物质，包括黄酮类化合物、肉桂醇、羊毛甾醇醋酸盐、十六酸、十八烯、二十二烷酸和维生素E等。

According to GC-MS analysis , the propolis contains 192 substances , including flavonoids , cinnamic alcohol , lanosterol acetate , hexadecanoic acid , 18-ene , 22 alkyl acids , vitamin E , etc.2 .

研究结果表明，采用两段连续串联反应工艺的丙烯齐聚反应，具有工艺条件温和，十二烯和十八烯选择性高的特点。

The results showed that under mild reaction conditions , the selectivity of dodecene and octadecene were high .

在此条件下，丙烯总转化率达到90%以上，十二烯和十八烯的选择性分别达到49.1%和9.3%。

Under the optimal conditions , total conversion of propene was as high as 90 % , and the selectivity of dodecene and octadecene were 49.1 % and 9.3 % , respectively .