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解答:1.Silylation, P modification and MgO modification can improve p - DEB selectivity greatly.
MgO改性提高对二乙苯选择性最为明显.
2.The best choice for separating diethylbenzene is the adsorptive separation by zeolite adsorbents in high efficiency.
指出高效、节能的分子筛吸附分离法是分离二乙苯的最佳选择.
3.The reaction 5 - amino - lH - pyrazole with 2,4 - dichlorophenoxy acetyl chloride was studied.
2.研究了 5- 氨基 -1H- 吡唑与2,4-二氯苯氧乙酰氯反应的选择性和反应性能.
4.L - Phenylalanine, L - valine and L - leucine were used to prepare the corresponding NCAs.
用L - 苯丙氨酸,L - 缬氨酸,L - 亮氨酸制得相应的N- 羧酸内酸酐,并分别与二乙胺,叔丁胺, 异丙胺,正丁胺反应.
5.Diethyl 1, 2 - DEE was synthesized in catalytic hydrogenation from diethyl phthalate as raw material.
以邻苯二甲酸二乙酯为原料,经催化氢化合成1, 2- 环己二甲酸二乙酯.
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