Ling Ping Chen

US Patent:

6506435, Jan 14, 2003

Filed:

Nov 3, 1999

Appl. No.:

09/432945

Inventors:

Brock Lundberg - St. Paul MN
Lin Gu - St. Paul MN
Rongsheng Roger Ruan - Arden Hills MN
Ling Chen - Roseville MN
Paul Bradley Addis - St. Paul MN
Jack Edgar Johnson - Waseca MN

Assignee:

Regents of the University of Minnesota - Minneapolis MN
Agricultural Utilization Research Institute - Crookston MN

International Classification:

A23L 105

US Classification:

426578, 426661, 426506, 426518, 426519, 162 90, 162 96, 162 99, 162176

Abstract:

An improved method for refining cellulose that produces a highly refined cellulosic material comprising soaking raw material in a mild NaOH using reduced temperatures and pressures, and refining the material with a plate refiner so that a waste water stream is reduced in volume and has a pH within a range of 8 to 9. Also, a HRC gel having a lignin concentration of at least about one (1)% by weight, and a water retention capacity of about 25 to at least about 56 g H O/g dry HRC is provided.

US Patent:

7074300, Jul 11, 2006

Filed:

Nov 25, 2002

Appl. No.:

10/303256

Inventors:

Brock Lundberg - St. Paul MN, US
Lin Gu - St. Paul MN, US
Rongsheng Roger Ruan - Arden Hills MN, US
Ling Chen - Roseville MN, US
Paul Bradley Addis - St. Paul MN, US
Jack Edgar Johnson - Waseca MN, US

Assignee:

Regents of the University of Minnesota - Minneapolis MN
Agricultural Utilization Research Institute - Crookston MN

International Classification:

B29D 23/00
A23L 1/05
D21C 3/02

US Classification:

162 90, 162 96, 162 99, 162176, 426578, 426661, 426506, 426518, 426519, 428 348

Abstract:

The present invention comprises an improved method for refining cellulose that produces a highly refined cellulosic material. The method comprises soaking raw material in a mild NaOH using reduced temperatures and pressures, and refining the material with a plate refiner so that a waste water stream is reduced in volume and has a pH within a range of 8 to 9. The present invention also comprises a HRC gel having a lignin concentration of at least about one (1)% by weight, and a water retention capacity of about 25 to at least about 56 g HO/g dry HRC.

US Patent:

7582213, Sep 1, 2009

Filed:

May 16, 2006

Appl. No.:

11/435221

Inventors:

Brock Lundberg - Roberts WI, US
Lin Gu - Seattle WA, US
Rongsheng Roger Ruan - Arden Hills MN, US
Ling Chen - Roseville MN, US
Paul Bradley Addis - St. Paul MN, US
Jack Edgar Johnson - Waseca MN, US

Assignee:

Regents of the University of Minnesota - St. Paul MN
Agricultural Utilization Research Institute - Crookston MN

International Classification:

B01D 61/00
B01D 39/00

US Classification:

210655, 2103231, 21050029, 162157, 162 6, 428 348

Abstract:

The present invention comprises an improved method for refining cellulose that produces a highly refined cellulosic material. The method comprises soaking raw material in a mild NaOH using reduced temperatures and pressures, and refining the material with a plate refiner so that a waste water stream is reduced in volume and has a pH within a range of 8 to 9. The present invention also comprises a HRC gel having a lignin concentration of at least about one (1)% by weight, and a water retention capacity of about 25 to at least about 56 g HO/g dry HRC.

US Patent:

8641872, Feb 4, 2014

Filed:

Sep 16, 2009

Appl. No.:

13/119672

Inventors:

Rongsheng Ruan - Arden Hills MN, US
Shaobo Deng - Eden Prairie MN, US
Zhiping Le - Jiangxi, CN
Yanling Cheng - Beijing, CN
Xiangyang Lin - Fujian, CN
Ling Chen - Roseville MN, US

Assignee:

Regents of the University of Minnesota - St. Paul MN

International Classification:

B01J 19/12
C01C 1/04

US Classification:

20415746, 20415752

Abstract:

The disclosure herein describes a method for producing ammonia by introducing N, CO and water into a non-thermal plasma in the presence of a catalyst, the catalyst being effective to promote the disassociation of N, CO and water to form reactants that in turn react to produce NHand CH. This disclosure also describes producing a reactive hydrogen ion or free radical by the method comprising passing water through a non-thermal plasma in the presence of a catalyst, the catalyst being effective to promote the dissociation of water.

US Patent:

58173811, Oct 6, 1998

Filed:

Nov 13, 1996

Appl. No.:

8/748373

Inventors:

Ling Chen - Roseville MN
Rongsheng Roger Ruan - New Hope MN
Jack Edgar Johnson - Waseca MN
Paul Bradley Addis - St. Paul MN
Li Xu - St. Paul MN
Lun Yi - St. Paul MN

Assignee:

Agricultural Utilization Research Institute - Minneapolis MN
Regents of the University of Minnesota - Waseca MN

International Classification:

C08B 322

US Classification:

428 348

Abstract:

A process and materials are described in which highly refined celleuloise fibers are broken down into microfibers and further processed into compositions, films. coatings and solid materials which are biodegradable and even edible. The process for the formation of hardenable compositions may comprise:providing a composition comprising non-wood cellulose fiber, 36. mechanically reducing the size of the non-wood cellulose fiber to less than 2 mm, reducing the amount of binding of microfibers by lignin within said non-wood cellulose fibers present in said composition comprising cellulose fiber to form a first fiber product, providing pressure of at least 300 psi to said first fiber product while it is in the presence of a liquid, and removing said pressure within a time interval which will cause said cellulose fiber to break down into a second fiber product comprising microfibers in said liquid.

US Patent:

20200289681, Sep 17, 2020

Filed:

Mar 13, 2020

Appl. No.:

16/818795

Inventors:

- Minneapolis MN, US
Yanling Cheng - St. Paul MN, US
Nan Zhou - St. Paul MN, US
Dongjie Chen - St. Paul MN, US
Peng Peng - Lauderdale MN, US
Yunpu Wang - St. Paul MN, US
Renchuan Zhang - St. Paul MN, US
Charles Schiappacasse - Maplewood MN, US
Ling Chen - Roseville MN, US

International Classification:

A61L 2/00
A23L 3/005
B01J 35/00
B01J 21/06

Abstract:

Disinfecting particulate material includes combining the particulate material with a photocatalyst to yield a mixture, irradiating the mixture for a length of time with pulses from a light source having broadband emission spectrum between 190 nm-1100 nm to yield an irradiated mixture, and separating the photocatalyst from the disinfected mixture to yield the disinfected particulate matter. Irradiating the mixture inactivates microorganisms in the mixture to yield a disinfected mixture. A system for disinfecting particulate material includes a pulsed light source having a broadband emission spectrum in a range between about 190 nm and about 1100 nm, a chamber defining a cavity optically coupled to the pulsed light source, a humidifier, a fan, and one or more sensors. The chamber includes a conveyor configured to accept the particulate material and arranged such that the pulses emitted by the pulsed light source irradiate the particulate material on the conveyor.

US Patent:

20160230106, Aug 11, 2016

Filed:

Feb 9, 2016

Appl. No.:

15/019707

Inventors:

Rongsheng Ruan - Arden Hills MN, US
Min Min Addy - Falcon Heights MN, US
Yong Nie - Beijing, CN
Erik Andrew Anderson - Minneapolis MN, US
Chonghao Bi - Beijing, CN
Dong Li - Beijing, CN
Ling Chen - Roseville MN, US

International Classification:

C10L 1/08
C11B 3/04

Abstract:

A method for production of a biodiesel is described herein. The method for production of a biodiesel comprises (a) separating solids from a waste oil composition to provide a clarified oil composition; (b) acidifying the clarified oil composition to produce an acidified oil composition including free fatty acids derived from the waste oil; (c) converting at least a portion of the free fatty acids in the acidified oil composition to glycerides to provide a glyceride composition; and (d) reacting at least a portion of the glycerides in the glyceride composition with methanol to form fatty acid methyl ester to provide a biodiesel composition.