625 results about "Ruthenium catalyst" patented technology
Filter
Efficacy Topic
Property
Owner
Technical Advancement
Application Domain
Technology Topic
Technology Field Word
Patent Country/Region
Patent Type
Patent Status
Application Year
Inventor
Ruthenium catalyst is highly active in hydrogenation of aliphatic carbonyl compound and aromatic ring. Hydrogenation is possible without side reaction in mild conditions. When mixing water with reacting system, water becomes a co-catalyst and can show high activity.
The invention discloses a method for recycling ruthenium in a supported type ruthenium or rutheniumoxide catalyst. The method comprises the following technological steps: (1) placing a supported type ruthenium catalyst or a supported type ruthenium oxide catalyst in an airtight container, heating to 300-500 DEG C, and roasting for 1-2 hours; and feeding nitrogen for protection during roasting process; (2) stopping the feeding of nitrogenstream in the step (1), continuing to heat to 800-1000 DEG C, and roasting for 2-10 hours; and obtaining black solids after cooling; (3) grinding black solids into powder, placing in the airtight container, and heating to 100-300 DEG C; and feeding oxygen / ozone to oxidize solidpowder and generate ruthenium tetroxide gas; and (4) feeding the ruthenium tetroxide gas into diluted hydrochloric acid, and restoring the acid combined with the gas into a red and brown ruthenium trichloride solution. According to the device, the step of recycling the catalyst is reduced; not only is the cost reduced during the recycling process of ruthenium catalyst, but also the recycling process is simplified; and economic benefit and the environment benefit are greatly improved.
A recovering process for the activated carbon carried Ru catalyst not containing the compound of alkali metal or alkali-earth metal includes such steps as calcining at 600-1000 deg.C for 2-20 hr to obtain gray mixture, mixing it with KOH and KNO3, holding the temp at 300-950 deg.C for 105 hr, cooling, dissolving in hot water at 50-90 deg.C to obtain K2RuO4 solution, adding sodiumhypochlorite and concentrated sulfuric acid, distilling to generate RuO4 gas, absorbing it by strong acid solution, and distilling to obtain Ru salt.