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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。 | |
PPh is just one of a series of commercial propylene glycol ethers.
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| | The coke formed on LA-2 catalysts during the conversion of propylene oxide and alcohols to propylene glycol ethers is studied by 13C CP/MAS NMR spectrostroscopy and 1H. 13C NMR spectrostroscopy for the soluble components in coke. The mechanism of coke formation and the reason of catalyst deactivation are also discussed | | 利用积炭样品的(13)CCP/MASNMR及其浸洗液的1H、(13)CNMR测试,研究环氧丙烷与醇合成丙二醇醚时催化剂(LA-2)的积炭结构及床展不同部位样品积炭的相对量,从而探讨其积炭的机理及催化剂失活的原因. | | 文摘来源 | |   |
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