System and method for repulping of paper products and improvement of water quality with dipolar solvents and recovery

a technology of dipolar solvents and paper products, applied in the direction of textiles and paper, digesters, raw materials, etc., can solve the problems of large disproportionality on the cellulose chain, carcinogenic, mutogenic and toxic to animal reproduction, etc., and achieve the effects of increasing the hydration power of fibrous materials, reducing the number of ink particles, and increasing the detachment of adhesives, additives and ink particles
US20100263812A1Inactive Publication Date: 2010-10-21SANATA TECH
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
SANATA TECH
Publication Date
2010-10-21
Estimated Expiration
Not applicable · inactive patent

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Abstract

An enhanced method of repulping paper and improving water quality by placing used paper product material in an aqueous solution of dipolar aprotic protophylic solvent, processing it, and recovering recycled pulp based on two physical reactions of the dipolar solvent: first with water from one part of the solvent, and second with cellulosic material from the other part of the solvent. The water reaction involves a rearrangement of hydrogen bonds within the water, improving its reactivity and solvent capacity, and the cellulosic reaction involves dissolution of hemicellulose in a manner which results in reduced fibre loss and improved pulp quality. The net result is more efficient pulping and reduced environmental impact.
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Description

FIELD OF THE INVENTION

[0001] This invention relates to the treatment of water and the repulping of paper products.BACKGROUND OF THE INVENTION

[0002] In the pulp manufacturing industry water is used extensively and is a vital element of the process of repulping paper. It is used for dissolving pulp, and as a component in loading, sizing, and coloring ingredients as well as in the transportation of pulp fibres through the manufacturing process as it moves through storage tanks, screens, refiners and paper-making machines.

[0003] The current process of repulping paper involves pulping, screening, cleaning, and de-inking by processes like bleaching and the application of alkaline chemicals which contaminate the water. Waste paper treatment methods are variable depending on the type of paper and may involve de-inking of toner from laser printers or photocopiers, or the removal of other contaminants from the paper.

[0004] Pollution sometimes causes water molecules to form large clusters which su...

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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