Loading patent…
AssigneesAkzo Nobel N.V., Nippon Ketjen Co., Ltd.
InventorsSonja Eijsbouts, Franciscus Wilhelmus Houtert, Marcel Adriaan Jansen, Tetsuro Kamo, Frans Lodewijk Plantenga
Estimating the term…
The present invention pertains to a process for regenerating a used additive-based catalyst comprising the step of regenerating the catalyst by contacting it with an oxygen-containing gas at a maximum temperature of 500° C. Preferably, the maximum catalyst temperature during the regeneration step is 300-500° C., more preferably 320-475° C., even more preferably 350-425° C. The regenerated additive-based catalyst obtained with the process according to the invention has a higher activity than an additive-based catalyst regenerated at a higher temperature. Additionally, its activity is also higher than that of a corresponding catalyst, which never contained an additive.
A process for regenerating an organic additive-based catalyst deactivated in the hydrotreating of hydrocarbon feeds and containing one or both of tungsten and molybdenum hydrogenation metals and containing one or both of nickel and cobalt hydrogenation metals, comprising the step of contacting said catalyst with an oxygen-containing gas at a maximum catalyst temperature of 500° C., said additive being selected from the group of compounds consisting of at least two oxygen atoms and 2-10 carbon atoms and the compounds built up from these compounds and/or the group of compounds consisting of at least one covalently bonded nitrogen atom and at least one carbonyl moyety, said catalyst containing said organic additive prior to being applied in the hydrotreating of hydrocarbon feeds, said additive being lost from said catalyst during a presulfiding step, if there is a presulfiding step, and/or during said catalyst being applied in the hydrotreating of hydrocarbon feeds.
Dependencies are inferred from the claim text.