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用碱金属阳离子（Ｎａ＋、Ｋ＋）交换改性后的丝光沸石作催化剂，研究其在甲醇气相胺化合成甲胺反应中的催化性能。结果表明，该催化剂对二甲胺具有较高的选择性和活性。用氨－胺混合物（氨一甲胺三甲胺＝８２．９１％１３．２５％３．８４％（质量））与甲醇反应时，在Ｎ／Ｃ（原子比）＝２．５—４．０、温度３００—３２０℃、压力１．８ＭＰａ、空速１５００—２５００ｈ－１条件下，反应产物中一甲胺、二甲胺和三甲胺之质量比可达３６．０７％，４８．７１％和１５．２２％，甲醇转化率大于９５％。用光电子能谱技术对催化剂进行表征，从而对催化剂的二甲胺高选择性提出了解释
The modified mordenite catalyst was exchanged with alkali metal cation (Na +, K +) to study its catalytic performance in the gas phase amination of methanol to methylamine. The results show that the catalyst has higher selectivity and activity for dimethylamine. In the case of reacting with methanol with an ammonia-amine mixture (ammonia-methylamine trimethylamine = 82.91% 13.25% 3.84% by mass) at a N / C (atomic ratio) = 2.5 to 4.0 , The temperature of 300-320 ℃, the pressure of 1.8MPa, the space velocity of 1500-2500h-1 conditions, the reaction product of monomethylamine, dimethylamine and trimethylamine mass ratio of up to 36.07%, 48.71% and 15.22%, methanol conversion rate greater than 95%. The catalyst was characterized by photoelectron spectroscopy to explain the high selectivity of dimethylamine to the catalyst