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US 2010/0305385 A1Published application
Decontamination of sediments through surface charge modification and encapsulation
OwnerYun-Feng Changinventor
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Abstract
Composition and process of encapsulation of sediment particles to reduce active pollutant components through surface charge modification.
Claims22
A composition of particle comprising a first particle covered or encapsulated by a second particle:
- (a) the first particle is selected from the group of sediment, polluted soil, solid removed from a chemical process, a production site, a polluted site, a mining site, a manufacturing site;
- (b) the second particle is selected from the group of colloids, cationic colloidal particles, metal oxides, nano-particles of oxides, clays, zeolites, molecular sieves, active carbon or carbon black, byproduct from a chemical process or manufacturing step.
A process of making a particle comprising a first particle covered or encapsulated by a second particle:
- (a) the first particle is selected from the group of sediment, polluted soil, solid removed from a chemical process, a production site, a polluted site, a mining site, a manufacturing site;
- (b) the second particle is selected from the group of colloids, cationic colloidal particles, metal oxides, nano-particles of oxides, clays, zeolites, molecular sieves, active carbon or carbon black, byproduct from a chemical process or manufacturing step.
The process of making a mixture comprising a first particle, the second particle, optionally the third and additional particles, and a dispersing medium following the sequence of:
- (a) the first particle is first introduced into the dispersing medium;
- (b) mix or mill the above mixture
- (c) the second particle is introduced into the mixed or milled first particle mixture
- (d) addition surface modifier is introduce in any of the steps of (a) to (c)
1 more element
Dependencies are inferred from the claim text.