Pulping process for quality protection including methods for hemicellulose extraction and treatment of hemicellulose-extracted lignocellulosic materials

a quality protection and lignocellulosic material technology, applied in the field of modified pulping processes, can solve the problems of reducing the amount of wood that can go to pulping, and achieve the effect of more economical pulping process and yield and quality
US20120168102A1Inactive Publication Date: 2012-07-05YOON SUNG HOON +2
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
YOON SUNG HOON
Publication Date
2012-07-05
Estimated Expiration
Not applicable · inactive patent

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Abstract

A method for producing pulp by extracting hemicellulosic materials from lignocellulosic materials using water in an extraction stage, wherein the extraction stage is either a single extraction or a double extraction process; treating the lignocellulosic materials with an oxidizing agent in a treatment stage, wherein the treatment stage is selected from the group consisting of a second extraction process, an agent impregnation process, and a first pretreatment process; treating the lignocellulosic materials with a reducing agent in the treatment stage, wherein the treatment stage is selected from the group consisting of the second extraction process, the agent impregnation process, and a second pretreatment process; and then subjecting the lignocellulosic materials to a modified Kraft pulping process to produce pulp.
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Description

STATEMENT OF RELATED APPLICATIONS

[0001] This patent application claims priority on and the benefit of U.S. provisional patent application No. 61 / 165,995 having a filing date of 2 Apr. 2009, which is incorporated herein in its entirety by this reference.BACKGROUND OF THE INVENTION

[0002] 1. Technical Field

[0003] This invention is related generally to the field of pulping processes preceded by hemicellulose extraction, and is related more specifically to modified pulping processes, and particularly modified Kraft pulping processes, preceded by a hemicellulose extraction process, that maintain yield and quality of pulp. This invention also is related to the field of yield and strength advantages that can be achieved by modified pulping processes compared to Kraft pulping processes not preceded by hemicellulose extraction.

[0004] 2. Prior Art

[0005] Pulping is the process of converting wood or other lignocellulosic materials into separated pulp fibers for use in, for example, paper making. Comm...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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