a modified catalyst palladowo - gold, especially in response wodoroodchlorowania carbon tetrachloride and obtained in this way, the catalyst palladowo - gold of suitable active phase of metallic construction

摘要

The object of the invention is the modification of the palladium-gold catalyst, in particular to the reaction of hydrochlorofluorocarbon with the characteristic that (a) after a previous reduction of the initial carrier palladium-gold catalyst, a non-alloy palladium is removed, which is the active metallic phase of the palladium gold metal catalyst using nitric acid (V). (b) the active metal catalyst phase in the dilution H2/Ar mixture with the production of a modified palladium gold carrier catalyst is then reduced;where the amount of palladium and gold in the catalyst results from the atomic ratio Au/Pd of 1,44 prior to the washing stage, and for the catalyst obtained after modification, the atomic ratio Au/Pd is from 1,50 to 2,00. In addition, the invention includes a palladium-gold catalyst, obtained by the above method, which is characterised by having an appropriate metallic phase in which palladium is contained only in the Pd-Au catalyst step, which means that this catalyst is free from the non-gold palladium and the atomic ratio Au/Pd in the The modified palladium gold carrier catalyst is 1.50 to 2.00.