Fibrous clay mixtures
AssigneeChevron Research Company
InventorDonald S. Santilli
Life of this patent
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Abstract
A porous, ceramic composition suitable for use as a catalyst support for demetalation of asphaltene-containing feedstocks is made from a combination of fibrous clays, wherein the fibers of both clays are randomly dispersed and the resulting mass extruded and calcined. The first fibrous clay is preferably halloysite and the second fibrous clay is preferably attapulgite.
Claims21
A porous composition of matter comprising codispersed rods of a first fibrous clay and a second fibrous clay, said first fibrous clay having predominantly rods with the length range of 0.5-2 microns and a diameter range of 0.04-0.2 microns and said second fibrous clay having predominantly rods with a length range of 1-5 microns and a diameter range of 50-100 Angstroms.
A composition of matter comprising codispersed rods of tubular halloysite and fibrous attapulgite.
A method for preparing a porous composition of matter comprising preparing a mixture of a first fibrous clay and a second fibrous clay, said first fibrous clay having predominantly rods with a length range of 0.5-2 microns and a diameter range of 0.04-0.2 microns, and said second fibrous clay predominantly having rods with a length range of 1-5 microns and a diameter range of 50-100 Angstroms;
- adding sufficient water to create a slurry of no more than 25 weight percent solid content;
- vigorously agitating the slurry until the slurry ceases to thicken;
- drying the slurry to create a dry mass;
- and shaping the dried mass;
- and calcining the shaped mass.
A method for producing a composition of matter comprising:
- preparing a mixture of tubular halloysite and fibrous attapulgite;
- adding enough water to create a slurry of no more than 25 weight percent water content;
- vigorously agitating the slurry until the thickening of the slurry ceases;
- drying the mass, shaping the mass, and calcining the shaped mass.
Dependencies are inferred from the claim text.