Method for coating ultrafine particles, system for coating ultrafine particles

Patent metadata

Field	Value
Publication number	US-10668499-B2
Application number	US-201815987405-A
Country	US
Kind code	B2
Filing date	May 23, 2018
Priority date	Feb 3, 2012
Publication date	Jun 2, 2020
Grant date	Jun 2, 2020

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 embodiment of the invention in which an exclusive property or privilege is claimed is defined as follows:

1. A method for coating particles, the method comprising:
a) fluidizing the particles;
b) subjecting the particles to a standing fluid wave which is produced by providing a modulating fluid flow in a reaction zone; and
c) contacting the subjected particles with a coating moiety.

2. The method as recited in claim 1 wherein the wave is generated when an inert fluid is coherently applied to the fluidized particles.

3. The method as recited in claim 2 wherein the inert fluid has the same frequency as the fluidized particles.

4. The method as recited in claim 1 wherein the wave is generated when an inert fluid is reflected onto the fluidized particles.

5. The method as recited in claim 1 wherein the particles are less than 20 microns in diameter.

6. The method as recited in claim 1 wherein the particles are more than approximately 10 nm and less than approximately 100 μm in diameter.

7. The method as recited in claim 1 wherein the standing fluid wave is the product of the fluid interacting with a reflector surface positioned within the reaction chamber.

8. The method as recited in claim 1 wherein the coating moiety comprises at least a portion of the standing fluid wave.

9. The method as recited in claim 1 wherein the particles are different sizes.

10. The method as recited in claim 1 wherein the reaction zone remains motionless.

11. The method as recited in claim 1 wherein the contacting step further comprises introducing two coating moieties alternatively into the reaction zone using a computer-controlled injection system with a fixed time interval between injections.

Assignees

• Uchicago Argonne Llc

Inventors

• Li Jie
• Liu Yung

Classifications

• C23C16/45502

  Flow conditions in reaction chamber · 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

• B05D1/24

  Applying particulate materials · CPC title

• C23C16/4417

  Methods specially adapted for coating powder · CPC title

• B01J2/16

  by suspending the powder material in a gas, e.g. in fluidised beds or as a falling curtain · CPC title