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- olefin cyclization 成烯关环反应
- Cyclization occurs readily with dilute alkali. 遇到稀碱就容易环化。
- Olefin gas closely approximates air. 烯空气跟空气十分近似。
- I advise you don't,but put on some olefin to conserve it. 建议不磨了，上石腊保存起来吧。
- Ozone is formed in the reaction, and a nitro derivative of the olefin. 在反应中形成臭氧及烯烃的硝基衍生物。
- Collect supply/demand data and conduct marketing analysis for olefin products. 收集烯烃产品的市场供需数据并做市场调研。
- We use synthetic materials such as nylon, polyester, acrylic or olefin. 用合成纤维，像尼龙、多元酯、压克力或烯属烃。
- Domestic gasoline consists of more than 75% high olefin contained FCC naphtha. 我国车用汽油的组成中烯烃含量较高的催化裂化汽油占75%25以上。
- High gaseous olefin yields are the main features of DCC and MGG technologies. 多产气体烯烃是DCC和MGG工艺的主要特点。
- Levocetirizine Dihydrochloride was prepared from benzoyl chloride by acidylation,hydrogenation,cyclization with an overall yield of 8.05%. 以苯甲酰氯为原料;经酰化;还原;环合等反应合成左旋西替利嗪盐酸盐;反应总收率为8.;05%25。
- Study progress on cyclization of citronellal to(-)-isopulegol over catalysts is reviewed. 综述催化香茅醛环化为(-)-异胡薄荷醇的催化剂研究进展.
- These fabrics are made of such fibers as polypropylene, olefin, polyester, nylon, and acrylic. 这些织物使用的纤维有：聚丙烯、烯烃、涤纶、尼龙以及丙烯膊纤维。
- Sodium ethylate was used as catalyst in Baker-Venkataraman of cyclization, and all factors were studied. 环合反应采用乙醇钠作为Baker-Venkataraman重排反应的催化剂,研究了影响反应的各个因素。
- METHODS Gimeracil was synthesized by steps of condensation, cyclization, chlorination and hydrolysis. 方法以丙二腈为起始原料，经缩合、环合、氯化、水解等5步反应制得吉美拉西。
- Application of samarium diiodide in mediating intramolecular cyclization reactions was reviewed. 综述了二碘化钐在分子内环化反应中的应用。
- The mechanism was discussed in the proton acid catalytic reaction of furan phenol cyclization. 探讨了呋喃酚环合反应质子酸催化机理。
- The organometallic compounds - catalyzed cyclization reactions in syntheses of carbo -and heterocycles are reviewed. 综述了近年来金属有机化合物催化的环化反应在合成碳20环及杂环化合物中的应用。
- Toward this end, the olefin 51 was treated with cyanogen azide and, indeed, produced the ring expanded ketone 52. 为了证明这一看法，他用氰化迭氮处理烯烃（51）就得到扩大的环酮。
- In contrast, switching the acylsilane functionality to an aldehyde, the radical cyclization failed. 至于将矽基酮的部分换成醛基时，自由基反应则无法进行。
- Due to reducing coke burning amount at high catalyst flux, packing stripper was fit for oil becoming heavier and olefin producing via FCC. 填料型汽提器在高催化剂循环通量条件下仍可有效降低再生器烧焦量，正适合原油重质化和利用催化裂化生产低碳烯烃的发展趋势。
