Method for coating ultrafine particles, system for coating ultrafine particles

Patent metadata

Field	Value
Publication number	US-9987657-B2
Application number	US-201414581154-A
Country	US
Kind code	B2
Filing date	Dec 23, 2014
Priority date	Feb 3, 2012
Publication date	Jun 5, 2018
Grant date	Jun 5, 2018

Abstract

The invention provides a method for dispersing particles within a reaction field, the method comprising confining the particles to the reaction field using a standing wave. The invention also provides a system for coating particles, the system comprising a reaction zone; a means for producing fluidized particles within the reaction zone; a fluid to produce a standing wave within the reaction zone; and a means for introducing coating moieties to the reaction zone. The invention also provides a method for coating particles, the method comprising fluidizing the particles, subjecting the particles to a standing wave; and contacting the subjected particles with a coating moiety.

First claim

The invention claimed is:

1. A system for coating particles, the system comprising:
a. a reaction zone;
b. a means for producing fluidized particles within the reaction zone;
c. a means for producing a standing fluid wave in the reaction zone by modulating fluid flow of a fluidizing gas; and
d. a means for introducing coating moieties to the reaction zone.

2. The system as recited in claim 1 wherein the reaction zone contains an adjustable surface adapted to reflect the modulating fluid flow.

3. The system as recited in claim 1 wherein the means for producing a standing fluid wave causes the fluidizing fluid to contact the fluidized particles to produce the standing wave.

4. The system as recited in claim 3 wherein the modulating fluid flow is coherently applied to the fluidized particles.

5. The system as recited in claim 1 wherein the particles are no larger than 100 microns in diameter.

6. The system as recited in claim 1 wherein the coating moieties comprise at least a portion of the standing fluid wave.

7. The system as recited in claim 1 wherein the particles are different sizes.

8. The system as recited in claim 1 wherein the reaction zone is defined by a reaction chamber and the reaction chamber remains motionless.

9. The system as recited in claim 1 wherein the means for introducing coating moieties to the reaction zone includes a computer-controlled injections system with a fixed time interval between injections for alternatingly introducing two coating moieties into the reaction zone.

Assignees

• Uchicago Argonne Llc

Inventors

• Li Jie
• Liu Yung

Classifications

• C23C16/442

  using fluidised bed process · CPC title

• B01J2/006 Primary

  Coating of the granules without description of the process or the device by which the granules are obtained (to prevent the granules sticking together B01J2/30) · CPC title

• B05C19/06

  Storage, supply or control of the application of particulate material; Recovery of excess particulate material · CPC title

• B05D1/24

  Applying particulate materials · CPC title

• C23C16/4417

  Methods specially adapted for coating powder · CPC title