Method for isolating ultrafine and fine particles and resulting particles
AssigneeBerhan Tecle
InventorBerhan Tecle
Life of this patent
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Abstract
A method of making isolated particles including the step of at least substantially encapsulating particles present in a highly dispersed colloidal suspension with an encapsulant material, such that the encapsulated particles remain independent and discrete upon separation from the suspension. Also, independent and discrete particles at least substantially encapsulated with the encapsulant material.
Claims56
Isolated particles prepared by a process comprising the steps of:
- forming a highly dispersed colloidal suspension of particles;
- adding to the suspension an encapsulant material to at least substantially encapsulate individual particles with the encapsulant material;
- and
- isolating from said suspension independent and discrete, individually encapsulated or substantially encapsulated particles.
Isolated metal particles formed according to the process comprising the steps of:
- preparing a highly dispersed colloidal suspension of particles comprising at least one metal in an organic solvent;
- adding to the suspension an encapsulant material to at least substantially encapsulate the individual metal particles with the encapsulant material;
- and
- isolating independent and discrete, individually encapsulated or substantially encapsulated metal particles from the suspension.
Independent and discrete, individual ultrafine particles having a diameter of 100 nm or less at least substantially encapsulated with an encapsulant material, wherein the encapsulant material is at least one compound selected from an amine, an ether, a thiol, a sulfide, a carboxylic acid, a hydroxy acid, a sulfonic acid, a polyhydroxy alcohol, an organosilane, a titanate, a zirconate, a zircoaluminate, a carboxylate, a sulfate, a sulfonate, an ammonium salt, a pyrrole, a furan, a thiophene, an imidazole, an oxazole, a thiazole, a pyrazole, a pyrroline, a pyrrolidine, a pyridine, a pyrimidine, a purine, a triazole, a triazine, and derivatives thereof.
Independent and discrete, individual fine particles having a diameter greater than 100 nm and less than 1500 nm at least substantially encapsulated with an encapsulant material, wherein the encapsulant material is at least one compound selected from an amine, an ether, a thiol, a sulfide, a carboxylic acid, a hydroxy acid, a sulfonic acid, a polyhydroxy alcohol, an organosilane, a titanate, a zirconate, a zircoaluminate, a carboxylate, a sulfate, a sulfonate, an ammonium salt, a pyrrole, a furan, a thiophene, an imidazole, an oxazole, a thiazole, a pyrazole, a pyrroline, a pyrrolidine, a pyridine, a pyrimidine, a purine, a triazole, a triazine, and derivatives thereof.
Dependencies are inferred from the claim text.