• NL原粉基础上制备了具有一定稳定性乙基化化剂z937

    An ethylation catalyst Z937 with suitable stability were prepared on THD basis of NL.

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  • 乙基选择性则与催化剂表面强度、酸性中心位置孔道结构等因素有关。

    Ethylation selectivity, was affected by strength of surface acid sites, location of acid sites and pore structure.

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  • 实验结果表明:本体系中转移化剂效率苄基三乙基大于四丁基溴乙基铵;

    The results show that catalytic efficiency of the phase transfer catalyst BETAC is higher than TBAB, and TBAB is nearly as efficient as TEBA.

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  • 制备了以超细二氧为载体乙基化可溶性蛋白质-化剂,研究了三丁基锡酰氯合物偶联反应的催活性。

    Silica supported cyanoethylated soluble protein-Pd has been prepared and its catalytic activity in the cross-coupling reaction of tributyltin hydride and acid chlorides was studied.

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  • 四丁基溴乙基效率相当;采用2相转移催化剂的催效率大于采用4克催化剂的催效率;随高锰酸钾用量增加而增加

    The effects of 2 g PTCs used are better than those of 4 g PTCs, and the yield of azelaic acid is raised as the amount of potassium permanganate increases.

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  • 椰油环氧乙烷乙基低级脂肪胺存在反应制得二羟乙基脂肪胺新型

    A new deactivator with lower pour point was obtained by the reaction of coconut amine and ethylene oxide in the presence of 5% catalyst.

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  • 氮芥是非结构专一性抗肿瘤生物烷化剂,作用靶点主要是DNA,其中N,N-(2-氯乙基氨基是抗肿瘤活性功能

    Mustard of non-structural specificity disturbs the synthesis of DNA due to the active functional group of N, N-(2-chloroethyl) amino.

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  • 氮芥是非结构专一性抗肿瘤生物烷化剂,作用靶点主要是DNA,其中N,N-(2-氯乙基氨基是抗肿瘤活性功能

    Mustard of non-structural specificity disturbs the synthesis of DNA due to the active functional group of N, N-(2-chloroethyl) amino.

    youdao

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