Yoon Young Lee

US Patent:

7977473, Jul 12, 2011

Filed:

Jun 20, 2008

Appl. No.:

12/214661

Inventors:

Yoon Y. Lee - Auburn AL, US

Assignee:

Auburn University - Auburn IL

International Classification:

C08B 16/00
C08B 1/00
C08B 9/00

US Classification:

536 56, 536 57

Abstract:

A non crystalline or low crystallinity cellulose is able to be formed into a medicine tablet medium. A method of making a tablet of non crystalline or low crystallinity cellulose comprises providing cellulosic material, adding an effective acid in an amount effective to at least wet the cellulosic material, mixing the cellulosic material and acid under conditions effective to form an essentially uniformly wet condition, letting the mixture sit at ambient conditions for a period of time sufficient to form a viscous fluid, adding water or other diluent in an amount sufficient to lower the acid concentration and to form a slurry, dewatering the slurry, removing any residual acid from the dewatered slurry and forming the tablet.

US Patent:

20050272926, Dec 8, 2005

Filed:

Jun 2, 2005

Appl. No.:

11/142936

Inventors:

Yoon Lee - Auburn AL, US
Hatem Harraz - Auburn AL, US

International Classification:

C08B001/00

US Classification:

536056000

Abstract:

A non crystalline or low crystallinity cellulose. A method of making a non crystalline or low crystallinity cellulose comprising providing cellulosic material, adding an effective acid in an amount effective to at least wet the cellulosic material, mixing the cellulosic material and acid under conditions effective to form an essentially uniformly wet condition, letting the mixture sit at ambient conditions for a period of time sufficient to form a viscous fluid, adding water or other diluent in an amount sufficient to lower the acid concentration and to form a slurry, dewatering the slurry, and removing any residual acid from the dewatered slurry.

US Patent:

20120273413, Nov 1, 2012

Filed:

Aug 20, 2010

Appl. No.:

13/391549

Inventors:

Yoon Y. Lee - Auburn AL, US
Wei Wang - Auburn AL, US
Li Kang - Auburn AL, US

Assignee:

AUBURN UNIVERSITY - Auburn AL

International Classification:

C02F 9/14
C02F 9/04
C02F 1/68
C02F 103/28

US Classification:

210606, 210749, 210703, 210754

Abstract:

A method of chemically treating partially de-ashed pulp and/or paper mill sludge to obtain products of value comprising taking a sample of primary sludge from a Kraft paper mill process, partially de-ashing the primary sludge by physical means, and further treating the primary sludge to obtain the products of value, including further treating the resulting sludge and using the resulting sludge as a substrate to produce cellulase in an efficient manner using the resulting sludge as the only carbon source and mixtures of inorganic salts as the primary nitrogen source, and including further treating the resulting sludge and using the resulting sludge to produce ethanol.

US Patent:

20220298531, Sep 22, 2022

Filed:

Mar 17, 2022

Appl. No.:

17/697703

Inventors:

- Aubum AL, US
- Fort Lupton CO, US
Zhihua Jiang - Auburn AL, US
Jing Li - Auburn AL, US
Harry Cullinan - Opelika AL, US
Yoon Y. Lee - Auburn AL, US

Assignee:

Auburn University - Auburn AL
PureVision Technology LLC - Fort Lupton CO

International Classification:

C12P 7/10
C13K 1/02
C12P 19/02
C08H 8/00
C12P 19/14
C08B 37/00
C13K 13/00

Abstract:

An integrated process and corresponding apparatus that produces a relatively clean, delignified cellulose product from lignocellulosic biomass. The method includes treating a portion of the delignified cellulose itself as a substrate to produce on-site cellulolytic enzymes, including further treating the remaining delignified cellulose with the resulting cellulolytic enzymes for in situ enzymatic hydrolysis. The process and apparatus are useful to produce fermentable sugars for cost-effective manufacturing of fermentable sugars, fuels, bioproducts and chemicals.