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1·By two alkyl halide with alkali metal or alkaline earth metal polysulfides from condensation.

由二卤代烷与碱金属或碱土金属的多硫化物缩聚而成。

2·The present invention discloses catalyzed hydrogen reduction process of alkyl halide to dehaloginate and produce hydrocarbon.

本发明公开了一种催化氢气还原卤代烃脱卤制备烃的方法。

3·X-ray photoelectron spectroscopy (XPS) indicated that the higher reaction activity of alkyl halide, the more alkyl substitution degree on hydroxyl group of chitosan.

对烷基化壳聚糖进行X射线光电子能谱分析表明，随着卤代烷试剂反应活性的增高，发生在壳聚糖羟基上的烷基取代反应增多。

4·Sulfuric acid dimethyl ester, one of the important chemical raw materials ACTS as the methylating agent in the organic synthesis for the purpose of replacing alkyl halide.

硫酸二甲酯是一种重要的化工原料，在有机合成中用于代替卤代烷作为甲基化剂。

5·The polystyrene is mixed with alkyl halide, alkyl aluminium halide, dehydrant, brominated by bromine to get narrow distributed brominated polystyrene with low molecular weight.

该聚苯乙烯与烷基卤化物、烷基卤化铝、脱水剂混合，用溴素溴化得到窄分布低分子量溴化聚苯乙烯。