PROCESS FOR APPLYING A CATALYTICALLY ACTIVE COATING ON CATALYST SUPPORTS

摘要

The present invention provides a process for applying a coating or film of catalytically active elements by means of solution on the external surface of a porous catalyst support i.e., a catalyst support having a large surface area, characterized in that the catalyst support is impregnated with a solution of at least one of various complexing agents, precipitants and reducing agents in an organic liquid, without exceeding the saturation of the catalyst supports, the solution of catalytically active elements is then added, the liquid is removed by heating and when required, the catalyst support thus treated is subjected to an aftertreatment which is treatment with a reducing agent or tempering at elevated temperature. The process provides a catalyst of uniform quality without a high loss of active components.