气相合成二氟甲烷的研究进展

综述了二氟甲烷的气相催化合成工艺及其催化剂制备的最新进展 ;探讨了浙江化工研究院、阿托公司和联合信号公司的合成工艺 ,指出高转化率、低能耗和较少有毒性副产物生成将是合成二氟甲烷工艺的发展方向。催化剂是影响原料转化率的关键因素之一 ,介绍了制备催化剂的浸渍、沉淀及混合方法 ,指出选择稳定性高、晶形单一的载体是提高催化剂活性和使用寿命的主要途径。

Advances in gaseous-phase synthesis of difluoromethane

Latest advances in the gaseous phase catalytic synthesis of difluoromethane and the preparation of catalysts are summarized. Processes of Zhejiang Research Institute of Chemical Industry,Atochem and Allied Signal are discussed. It is pointed out that processes featuring high conversion rate, low energy consumption and less toxic byproducts will be the development trend in the synthesis of difuoromethane. Catalysts are one of the key factors for raw material conversion rate. Methods for the preparation of catalysts such as dipping, precipitating and mixing are reviewed. It is pointed out that the selection of supports with high stability and single crystal form is the major way to improve the activity and life of catalysts.