Shell Oil Comapny

Herman W Kouwenhoven

Willem H Stork

Hennie Schaper

Method for the regeneration of spent alumina-based catalysts wherein the catalyst firstly is treated with steam at elevated temperature in order to remove at least part of the sulphur; subsequently with an oxygen-containing gas at elevated temperature, in order to burn off carbonaceous matter and finally with a basic medium.

Method for the regeneration of spent alumina-based catalysts

Novel crystalline silicates which in dehydrated form have the composition in terms of moles of the oxides: (1.0.+-.0.3)(R).sub.2/n O.[aFe.sub.2 O.sub.3.bAl.sub.2 O.sub.3.cGa.sub.2 O.sub.3.y(dSiO.sub.2.eGeO.sub.2)], wherein R is one or more mono- or bivalent cations and a, b, c, d, e, y and n are as defined hereinafter are disclosed. The thermally stable silicates are suitably employed as extracting agents, drying agents, ion exchange agents, catalysts and catalyst carriers.

Crystalline silicates and hydrocarbon-conversion processes employing same

Novel crystalline silicates which in dehydrated form having the composition in terms of moles of the oxides: (1.0.+-.0.3) (R).sub.2/n O. [a Fe.sub.2 O.sub.3. b Al.sub.2 O.sub.3. c Ga.sub.2 O.sub.3. y(dSiO.sub.2. eGeO.sub.2)], wherein R is one or more mono- or bivalent cations and a, b, c, d, e, y and n are as defined hereinafter are disclosed. The thermally stable silicates are suitably employed as extracting agents, drying agents, ion exhange agents, catalysts and catalyst carriers.

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Amsterdam, Netherlands

Herman W Kouwenhoven