Synthesis of diallylmethylamine from lower concentration methylamine water solution and allylchloride has been performed using polyglycol-400(PEG-400) as phase transfer catalyst. The results show that the reaction tim...Synthesis of diallylmethylamine from lower concentration methylamine water solution and allylchloride has been performed using polyglycol-400(PEG-400) as phase transfer catalyst. The results show that the reaction time can be efficiently shortened and product yield can be significantly increased. The orthogonal experimental method has been used to optimize the experiment conditions. The optimal condition are as follows:PEG-400 phase transfer catalyst, mole ratios of allylchloride∶methylamine=2.2∶1, the two periods of reaction temperature and time 20 ℃(1 h) and 60 ℃(6 h), diallylmethylamine is obtained in 75.6% yield. The product is characterized by IR, GC-MS and 1H NMR.展开更多
The synthesis of zeolites with special morphologies has attracted much attention,because the morphologies influence the efficiency of catalysis,applications as the hosts for micro-devices,and so on. Silicalite-1 with ...The synthesis of zeolites with special morphologies has attracted much attention,because the morphologies influence the efficiency of catalysis,applications as the hosts for micro-devices,and so on. Silicalite-1 with chain-like morphology (0.576.33 m) were synthesized successfully with poly(diallyldimethylammonium chloride) (PDDA) as an additive and was characterized by XRD and SEM. The PDDA as the additive in the synthesis system was the real key for the formation of the chain-like morphology of the products. The length and the diameter of the material can be tuned through adjusting the molar ratios of PDDA and TPAOH. The straight channels of materials are longer and their openings are much fewer than those of the traditional slicalite-1 crystals,because of the crystal stacking along the b axis.展开更多
文摘Synthesis of diallylmethylamine from lower concentration methylamine water solution and allylchloride has been performed using polyglycol-400(PEG-400) as phase transfer catalyst. The results show that the reaction time can be efficiently shortened and product yield can be significantly increased. The orthogonal experimental method has been used to optimize the experiment conditions. The optimal condition are as follows:PEG-400 phase transfer catalyst, mole ratios of allylchloride∶methylamine=2.2∶1, the two periods of reaction temperature and time 20 ℃(1 h) and 60 ℃(6 h), diallylmethylamine is obtained in 75.6% yield. The product is characterized by IR, GC-MS and 1H NMR.
文摘The synthesis of zeolites with special morphologies has attracted much attention,because the morphologies influence the efficiency of catalysis,applications as the hosts for micro-devices,and so on. Silicalite-1 with chain-like morphology (0.576.33 m) were synthesized successfully with poly(diallyldimethylammonium chloride) (PDDA) as an additive and was characterized by XRD and SEM. The PDDA as the additive in the synthesis system was the real key for the formation of the chain-like morphology of the products. The length and the diameter of the material can be tuned through adjusting the molar ratios of PDDA and TPAOH. The straight channels of materials are longer and their openings are much fewer than those of the traditional slicalite-1 crystals,because of the crystal stacking along the b axis.
