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|  | | 为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。 | |
NMR and infrared spectroscopic studies of the self-association of tert-butyl and tert-pentyl hydroperoxides
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| | This paper introduces the synthesis of four different rare earth derivatives of diphthalocyanine:octa-4-(tetrahydro-saccharoxyl)neodymium(Ⅲ)(A):octa4-(β-naphthoxy)neodymium(Ⅲ)(B);octa4-(2,4-bis-(tert-pentyl)phenoxyl) neOdymium(Ⅲ)(C) and octa-4-(2,4-bis.(tert-pentyl)phenoxyl)praseodymium(Ⅲ)(D),which have been confirmed by elemental analysis,infrared spectrum(IR)and nuclear-magnetic re-sonant spectrum(NMR).Ultravionlet and visible spectrum(UV/Vis)proved that these four complexes exist ... | | 本文介绍四种新的稀土(Nd,Pr)(Ⅲ)双酞菁衍生物合成:八-4-(四氢糖氧基)钕(Ⅲ)(A);八-4-(β-萘氧基)铁(Ⅲ)(B);八-4-(2.4-二特戊基苯氧基)钕(Ⅲ)(C);八-4-(2.4-二特戊基苯氧基)镨(Ⅲ)(D).并通过元素分析、红外光谱、核磁共振谱加以确认。紫外可见光谱表明它们在氯仿(10 ̄(15)moL/L)溶液中以单分子形式存在,热重分析证明配合物的热稳定性:B>C>A。实验得出,四种配合物成膜性好. | | 文摘来源 | | Etherification of 5 carbon and 6 carbon tertiary olefins in FCC light naphtha to methyl tert pentyl ether and methyl tert hexyl ether for reducing the olefin content in FCC naphtha was conducted on a catalytic distillation pilot plant. Through mixing the etherified oil into the heavy portion of the FCC naphtha at a natural ratio, the olefin content of FCC naphtha reduced by 5-9 percentage, the antiknock index dropped more than 1 unit and the vapor pressure decreased significantly. | | 报道FCC轻汽油馏分中的C5、C6叔烯烃与甲醇进行醚化反应转化为甲基叔戊基醚、甲基叔己基醚 ,降低汽油中烯烃含量的催化蒸馏中型试验 ,结果表明 ,将醚化油按自然比例与催化裂化重汽油馏分混合后 ,汽油的烯烃含量约降低 5~ 9个百分点 ,蒸气压显著降低 ,抗爆指数提高 1个单位以上。 | | 文摘来源 | |   |
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