PILLARED SILICA AND METAL OXIDE CATALYST AND PREPARATION METHOD OF -CAPROLACTAM THEREOF

摘要

PURPOSE: Disclosed are a porous catalyst composed of pillard silica and metal oxide and a preparation method of ε-caprolactam from cyclohexanone oxime. CONSTITUTION: The porous catalyst is mainly composed of a pillard silica and a metal oxide. The sodium ion (Na+) on pillard silica is substituted with hydrogen ion (H+) of inorganic acid solution and a spacing width of pillard silica expands to 20 - 30 Å by using a long chained amine compound. And then metal oxide compounds are added in the spacing interval of the pillared silica. The added content of metal oxide is optimally 2 - 10 wt% and the surface area is 100 - 300 m2/g. The pillared silica is precipitated from kanemite, kenyaite, magadite, illite, octosilicate and Ta2O5, Nb2O5, TiO2 or SiO2 are used as metal oxides.