Eric Chao Xu

age ~67

from Cincinnati, OH

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Multi-Stage Ap Mechanical Pulping With Refiner Blow Line Treatment
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US Patent:

8216423, Jul 10, 2012
Filed:

Mar 26, 2010
Appl. No.:

12/661907
Inventors:

Eric Chao Xu - Miamisburg OH, US
Assignee:

Andritz Inc. - Muncy PA
International Classification:

D21C 9/16
D21B 1/02
D21B 1/04
US Classification:

162 25, 162 26, 162 52, 162 56, 162261, 241 27, 241 28, 8107, 8111
Abstract:

The invention combines the step of adding chemicals such as alkaline peroxide to an intermediate line after refining, with the step of applying chemicals such as alkaline peroxide as a pre-treatment before primary refining and/or applying chemicals such as alkaline peroxide at the primary refiner. This is implemented in the preferred embodiment, by pre-treating feed material, refining the materials into a pulp in a superatmospheric refiner, and adding chemicals in the post refining blowline.

Processes And Systems For The Pulping Of Lignocellulosic Materials
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US Patent:

8262851, Sep 11, 2012
Filed:

Jul 18, 2007
Appl. No.:

11/826837
Inventors:

Johann Aichinger - Pregarten, AT
Eric Xu - Fairborn OH, US
Marc J. Sabourin - Beavercreek OH, US
Assignee:

Andritz Inc. - Glens Falls NY
International Classification:

D21B 1/02
D21B 1/16
US Classification:

162 25, 162 24, 162 28
Abstract:

A non-compression vessel, such as a digester, is employed for the chemical preconditioning of the chips followed by a fiberizing device to break the preconditioned chips down to fiber bundles, which are then washed before a high consistency chemical treatment. The digester may be one such as used in conventional chemical pulping of wood with or without screens for the extraction of chemical. If extracted this chemical could be recirculated to the digester with treatment in the circulation loop such as heating or the addition of dilution or other chemicals. This digester may be hydraulic or vapor phase (that is contain a vapor space within the digester), and operate in either a continuous or batch fashion. This digester allows for the discharge of material without the use of a screw mechanism. The digester treated material is then defiberized to convert the chips into course fiber bundles, which then is washed and dewatered.

Multi-Stage Ap Mechanical Pulping With Refiner Blow Line Treatment
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US Patent:

20040069427, Apr 15, 2004
Filed:

Oct 2, 2003
Appl. No.:

10/677545
Inventors:

Eric Xu - Miamisburg OH, US
International Classification:

D21C003/00
US Classification:

162/078000
Abstract:

The invention combines the step of adding chemicals such as alkaline peroxide to an intermediate line after refining, with the step of applying chemicals such as alkaline peroxide as a pre-treatment before primary refining and/or applying chemicals such as alkaline peroxide at the primary refiner. This is implemented in the preferred embodiment, by pre-treating feed material, refining the materials into a pulp in a superatmospheric refiner, and adding chemicals in the post refining blow-line.

Four Stage Alkaline Peroxide Mechanical Pulpings
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US Patent:

20100186910, Jul 29, 2010
Filed:

Mar 26, 2010
Appl. No.:

12/661909
Inventors:

Martin Herkel - Vienna, AT
Thomas Pschorn - Lennoxville, CA
Eric Chao Xu - Miamisburg OH, US
International Classification:

D21B 1/12
US Classification:

162 26
Abstract:

A process for applying chemicals, such as an alkaline peroxide pretreatment () to lignocellulosic material before chemical refining and at the primary refiner (). The preferred embodiment comprises (i) preconditioning at temperatures below 95 C., especially below 80 C., (ii) limiting the time and/or temperature in the refiner, (iii) reaction quench to maintain temperatures below 80 C., and (iv) subsequent high consistency bleaching ().

Chemical Treatment Of Lignocellulosic Fiber Bundle Material, And Methods And Systems Relating Thereto
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US Patent:

20140083633, Mar 27, 2014
Filed:

Sep 27, 2013
Appl. No.:

14/038940
Inventors:

- Glens Falls NY, US
Eric XU - Fairborn OH, US
Assignee:

ANDRITZ INC. - Glens Falls NY
International Classification:

D21C 3/26
US Classification:

162 25, 162234, 162 24
Abstract:

The present disclosure relates to a system and process in which pulp is produced using a chemical mechanical pulping process, during which lignocellulosic material undergoes fiberization without chemical impregnation. Chemical treatment of the lignocellulosic material is performed during or after fiberization of the material to become fiber bundles.