Junyong Yong Zhu

US Patent:

7381305, Jun 3, 2008

Filed:

Mar 25, 2005

Appl. No.:

11/090537

Inventors:

JunYong Zhu - Madison WI, US
Freya Tan - Madison WI, US
Roland Gleisner - Jefferson WI, US

Assignee:

The United States of America as represented by the Secretary of Agriculture - Washington DC

International Classification:

D21F 7/06

US Classification:

162263, 162198, 162 4, 162 5, 209164, 209166, 209170

Abstract:

A method and apparatus are presented for determining the quantity of liquid and solid content in a removal stream of a froth created from a suspension that is generated during a froth flotation operation. Specifically, electrodes are immersed in the froth generated from a suspension having a known quantity of fiber particles, and the conductance of the froth is measured to establish a relationship between the measured conductance and the quantity of fiber particles. The electrodes are then submerged in a froth generated from a suspension having an unknown quantity of fiber particles, and the froth conductance is measured. The quantity of fiber particles in the froth can then be determined from the pre-established relationship between conductance and solid particle content.

US Patent:

7618517, Nov 17, 2009

Filed:

Mar 31, 2008

Appl. No.:

12/080022

Inventors:

JunYong Zhu - Madison WI, US
Freya Tan - Madison WI, US
Roland Gleisner - Jefferson WI, US

Assignee:

The United States of America as represented by the Secretary of Agriculture - Washington DC

International Classification:

D21F 11/00

US Classification:

162198, 162 4, 162 5, 162263, 209164, 209166

Abstract:

A method and apparatus are presented for determining the quantity of liquid and solid content in a removal stream of a froth created from a suspension that is generated during a froth flotation operation. Specifically, electrodes are immersed in the froth generated from a suspension having a known quantity of fiber particles, and the conductance of the froth is measured to establish a relationship between the measured conductance and the quantity of fiber particles. The electrodes are then submerged in a froth generated from a suspension having an unknown quantity of fiber particles, and the froth conductance is measured. The quantity of fiber particles in the froth can then be determined from the pre-established relationship between conductance and solid particle content.

US Patent:

7945098, May 17, 2011

Filed:

May 17, 2007

Appl. No.:

11/804115

Inventors:

David W. Vahey - Madison WI, US
JunYong Zhu - Madison WI, US
Charles Timothy Scott - Mt. Horeb WI, US

Assignee:

The United States of America as represented by the Secretary of Agriculture - Washington DC

International Classification:

G06K 9/46

US Classification:

382207

Abstract:

A method is provided for reliably determining anatomical properties of a tree having a plurality of growth rings spaced from each other in a radial direction. The method involves preparing a sample from a tree to be analyzed, and preparing an image of the sample at a resolution sufficient to analyze at least one of the earlywood and latewood portions of one or more rings. The image is used to determine at least one anatomical property of the sample based on the image, the anatomical property being selected from the group consisting of sample density, tracheid wall thickness, and tracheid exterior dimension.

US Patent:

20120316330, Dec 13, 2012

Filed:

Jun 8, 2012

Appl. No.:

13/491881

Inventors:

JunYong Zhu - Madison WI, US
Ronald Sabo - Sun Prairie WI, US
Craig Clemons - Madison WI, US

Assignee:

The United States of America as Represented by the Secretary of Agriculture - Washington DC

International Classification:

C12P 19/14
C12P 7/10
C08B 15/00
C12P 19/20
C12P 19/02
B82Y 40/00

US Classification:

536 56, 435 99, 435 96, 435105, 435165, 977795, 977888

Abstract:

The present invention relates to systems, compositions and methods for the conversion of lignocellulosic material to recalcitrant cellulose and hydrolyzed sugars and products produced therefrom (e.g., biofuel, nano-fibrillated cellulose). In particular, the invention provides novel fractionation processes configured to integrate production of hydrolyzed sugars (e.g., for biofuel production) and recalcitrant cellulose (e.g., for nano-fibrillated cellulose production) from lignocellulosic material and methods of using the same (e.g., in the production of biofuel and nano-fibrillated cellulose). The invention is also directed to nanocellulose with morphologies of having a less entangled and slightly branched fibril network, and having the same thermal stability as of that of the initial lignocellulose feedstock.

US Patent:

20130303750, Nov 14, 2013

Filed:

May 15, 2012

Appl. No.:

13/472137

Inventors:

JunYong Zhu - Madison WI, US
Richard S. Reiner - Madison WI, US

Assignee:

The United States of America as Represented by the Secretary of Agriculture - Washington DC

International Classification:

C08B 5/00
C08B 5/14
C08B 15/00
B82Y 40/00
B82Y 30/00

US Classification:

536 59, 536 58, 536 62, 536 56, 977762, 977795, 977900, 977896

Abstract:

Methods for integrating the production of cellulose nanocrystals (CNC) and cellulose nanofibrils (CNF) from cellulose are provided. The methods use milder acid hydrolysis conditions than those for maximal CNC production to achieve reduced degradation of cellulose into soluble sugars. Also provided are negatively charged cellulosic solid residues (CSRs) in the form of cellulose fibers (CF) and/or cellulose microfibrils (CMF) during the acid hydrolysis, as well as CNFs fabricated from the CSRs.

US Patent:

58765581, Mar 2, 1999

Filed:

Dec 17, 1997

Appl. No.:

8/992727

Inventors:

Yulin Deng - Marietta GA
Junyong Zhu - Marietta GA

Assignee:

Institute of Paper Science and Technology, Inc. - Atlanta GA

International Classification:

D21C 502

US Classification:

162 4

Abstract:

The present invention provides a froth flotation process for the separation of paper and wood fibers from printed and copying inks and other contaminants during the recycling of paper. A liquid solution containing a frothing agent is applied from the top of a froth flotation device, preferably in the form of a spray, to the upper surface or portion of an aqueous pulp slurry present in the device, or of a froth phase produced in the device, prior to or during the froth flotation process.

US Patent:

20140106407, Apr 17, 2014

Filed:

Oct 15, 2012

Appl. No.:

13/652267

Inventors:

The United States of America as Represented by the Secretary of Agriculture - , US
JunYong Zhu - Madison WI, US

Assignee:

The United States of America as Represented by the Secretary of Agriculture - Washington DC

International Classification:

C12P 19/14
C12P 13/14
C12P 7/16
C12M 1/40
C12P 7/14

US Classification:

435 99, 4352891, 435162, 435160, 435110

Abstract:

A system is provided for reducing non-specific binding of an enzyme to lignin to enhance an enzymatic processing of a lignocellulosic material. The enhancements provide economic and process advantages to any process that converts a lignocellulosic biomass into a product using an enzyme. Systems are provided comprising a reaction vessel; a lignocellulosic feedstock comprising a component selected from the group consisting of a hardwood, a softwood, or a non-wood material; an enzyme component including a cellulase, a hemicellulase, or a combination thereof; and, water. The reaction vessel can contain a combination of the lignocellulosic feedstock, the water, and the enzyme component at a pH ranging from about 5.2 to about 6.2; and, the lignocellulosic feedstock can be saccharified in the reaction vessel. Moreover, the systems can include a lignosulfonate, with or without a pH of about 5.2 to about 6.2, to also reduce non-specific binding and enhance enzymatic activity.