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1225104 
Journal Article 
Surface modification of natural mordenite by acid washing and catalytic performance for the synthesis of dimethylamine 
Chu, RuiZhi; Meng, XL; Zu, JiaMei; Zong, ZhiMin; Wei, XY 
2010 
No 
Zhongguo Kuangye Daxue Xuebao
ISSN: 1000-1964 
39 
2 (Feb 2010) 
279-283 
In order to enhance the catalytic activity of natural mordenite (NM) for gas-phase amination of methanol with ammonia (GAMA) and selectivity of dimethylamine, the acid washing conditions, including solvent concentration, treatment temperature, treatment times, and treatment time were optimized. The process conditions for GAMA with modified NM were studied. The results show that the optimum conditions of acid washing are 2 mol/L solvent concentration, 80 degree C treatment temperature, 4 times treatment and 0.5 h at a time. Acid washing treatment did not destroy crystal structure of NM but increased distribution of micro-pore size by removing impurity in pores of NM, and increased acidity in active center on NM surface. The optimal conditions of GAMA are 390 degree C reaction temperature, 1.93 h-1 liquid hourly space velocity and 1.8 NH3/CH3OH. The NM deactivation is mainly controlled by coke deposition on internal surface. The reaction temperature should be under 410 degree C in order to avoid deactivation. 
IRIS
• Methanol (Non-Cancer)
     Search 2012
          ProQuest
 

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