甲醇氯化铵法合成氯甲烷催化剂

Synthesis of Methyl Chloride from Methanol and Ammonium Chloride

采用等体积浸渍法,分别以Zn(NO3)2,Ni(CH3COO)2,Zn(CH3COO)2,Ni(NO3)2和ZnCl2作为负载物制备了活性炭载体金属基催化剂,在自制的常压连续流动固定床反应器中,以氯化氢和甲醇为原料,在氨环境下模拟氯化铵与甲醇反应考察了不同催化剂在合成氯甲烷中的催化性能。结果表明,以活性炭为载体制备的氯化锌催化剂,在温度290～350℃,氯化氢和甲醇物质的量之比为1:1和空速300 min-1的条件下,甲醇转化率、氯甲烷选择性和收率较高,氯甲烷收率达到66%以上。催化剂性能稳定,且有较长的使用寿命。

Metal-based catalysts carried on activated carbon support for synthesis of methyl chloride from methanol and ammonium chloride were prepared with iso-volumetric impregnation of Zn（NO3）2, Ni（CHaCOO）2, Zn（CHaCOO）2, Ni（NO3）2 and ZnCl2, respectively. The catalytic performance of the catalysts for synthesis of methyl chloride from methnnol and ammonium chloride were evaluated in a laboratory fixed bed reactor fed. The experimental results showed that the catalyst prepared with ZnCI2 impregnation method exhibited the best catalytic performance under the conditions of temperature of 290-350℃, molar ratio of methanol to hydrogen chloride of l：l, and space velocity of 300 min^-l. The yield of ammonium chloride reached up to 66%. Moreover, the catalyst was stable and had a long life time.