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US 4,208,305 AGranted
Crystalline silicates and process of preparation
AssigneeShell Oil Company
InventorsHerman W. Kouwenhoven, Willem H. J. Stork
Life of this patent
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Abstract
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.
Claims14
Crystalline silicates, characterized in that
- (a) they are thermally stable up to temperatures above 600.degree. C.;
- (b) after dehydration in vacuum at 400.degree. C. they are capable of absorbing more than 3%w water at 25.degree. C. and saturated water vapor pressure;
- and
- (c) in the dehydrated form they have the following overall composition, in terms of moles of the oxides:
- (1.0.+-.0.3)(R).sub.2/n 0.[a Fe.sub.2 O.sub.3. b Al.sub.2 O.sub.3. c Ga.sub.2 O.sub.3 ]. y (d SiO.sub.2. e GeO.sub.2),
- where
- R=one or more monovalent or bivalent cations introduced during preparation of said silicates and selected from the group consisting of alkaline metals, alkaline earth metals and organic cations obtained from primary, secondary and tertiary alkylamines and quaternary ammonium compounds;
- a>0.5
- b.gtoreq.0;
- c.gtoreq.0;
- a+b+c=1;
- y=10 to 300
- d.gtoreq.0.1;
- e.gtoreq.0;
- d+e=1,
- n is the valency of R;
- and their X-ray diffraction patterns include, inter alia, the reflections given in Table A of this specification.
14 more elements
Dependencies are inferred from the claim text.