Abstract: The process has as an object the regeneration catalysts containing at least one contaminating metal of the vanadium, nickel and iron group. The operation is conducted as follows:(a) The catalyst (1) is roasted in the presence of an oxygen-containing gas so as to remove at least 90% of the sulfur;(b) The catalyst obtained in step (a) is contacted with a hydrogen peroxide aqueous solution containing at least one organic compound including a polar functional group, so as to remove at least 10% of the deposited metals of the vanadium, nickel and iron group; and(c) The regenerated catalyst (11) is separated from the aqueous solution of metal ions (5). The latter can be regenerated by passage over a complexing resin (6).The process is applicable to the regerneration of used catalysts, particularly to hydrotreatment catalysts in the oil industry.

Abstract: For the selective hydrogenation of a hydrocarbon charge containing at least one acetylenic and/or diolefinic hydrocarbon, there is used a catalyst comprising at least one group VIII metal selected from the platinum, palladium, nickel and cobalt group, or a compound thereof, and at least one metal from the group comprising germanium, tin and lead or a compound thereof, wherein at least one compound from one of the above-defined group VIII metals and at least one compound of metal from the germanium, tin and lead group is incorporated in a carrier, e.g., alumina, and wherein the compound of metal from the germanium, tin and lead group is incorporated in the carrier as a hydrocarbyl compound of said metal.

Abstract: Alcohols and particularly fatty alcohols are manufactured by hydrogenolysis of carboxylic esters in the presence of a catalyst comprising a carrier, rhodium and at least one second element selected from the group consisting of tin, germanium and lead. The rhodium content is from 0.1 to 5% b.w. and the content of the second element is from 0.1 to 10% b.w.