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US 5,922,403 AGranted
Method for isolating ultrafine and fine particles
OwnerBerhan Tecleinventor
Life of this patent
Estimating the term…
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.
Claims37
A method for isolating particles, comprising the steps of:
- forming a highly dispersed colloidal suspension of solid particles;
- adding to the suspension an encapsulant material and allowing the encapsulant material to directly contact said solid particles, thereby at least partially covering the surfaces of individual particles to encapsulate or substantially encapsulate said individual particles;
- allowing the individually encapsulated or substantially encapsulated particles to flocculate and settle out of the suspension thereby forming two phases, including a layer rich in the individually encapsulated or substantially encapsulated particles and a solvent-rich layer;
- and
- isolating independent and discrete, individually encapsulated or substantially encapsulated particles by separating the layer rich in said particles from the solvent-rich layer.
2 more elements
A method of isolating metal particles, comprising the steps of:
- preparing a highly dispersed colloidal suspension of solid particles comprising at least one metal in an organic solvent;
- adding to the suspension an encapsulant material and allowing the encapsulant material to directly contact said solid particles, thereby at least partially covering the surfaces of individual metal particles to encapsulate or substantially encapsulate said individual particles;
- allowing the individually encapsulated or substantially encapsulated metal particles to flocculate and settle out of the suspension thereby forming two phases, including a layer rich in the individually encapsulated or substantially encapsulated metal particles and a solvent-rich layer;
- and
- isolating independent and discrete, individually encapsulated or substantially encapsulated metal particles by separating the layer rich in said particles from the solvent-rich layer.
2 more elements
Dependencies are inferred from the claim text.