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Production technology of extrahigh viscosity refining cotton

A production process, a technology for refining cotton, applied in textile and papermaking, fiber processing, other chemical processes, etc., can solve the problems of long cooking time, low production efficiency, and large amount of NaOH

Inactive Publication Date: 2006-01-11
周家贵
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages are: the cooking is completed at one time, the cooking time is too long, the production efficiency is low, the amount of NaOH is large, and the product α-cellulose content is low
Wastewater treatment is difficult and energy consumption is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0004] 1) Material selection: select cotton linters with maturity ≥ 80%, no miscellaneous appearance, no foreign fibers, and fiber length between 8-10 mm as raw materials;

[0005] 2) Cooking:

[0006] a. Pre-cooking: put the raw materials into the steaming ball, add NaOH and Na 2 SO 3 Aqueous solution, pH value 8-10, dissolving ratio 1: 3-5, containing NaOH and Na by weight 2 SO 3 The concentration of NaOH in the aqueous solution is 2.1-2.6%, Na 2 SO 3 The concentration is 1-3%, and the ball is steamed at room temperature for 15-30 minutes;

[0007] b. The first stage of cooking: control the temperature in the steaming ball at 110-120°C, control the pressure at 0.1-0.3MPa, and cook for 50-70 minutes in the first stage;

[0008] c. Final stage cooking: control the temperature inside the steaming ball between 130-150°C, control the pressure at 0.3-0.6MPa, and final stage cooking for 70-120 minutes;

[0009] 3) Pulp washing: wash pulp with clean water or neutralized and r...

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Abstract

The present invention relates to a production process of extra high viscosity refined cotton. Said production process includes the following procedure:(1) selecting material; (2) cooking; (3) washing pulp; (4) bleaching pretreatment; (5) bleaching; and (6) rolling, dewatering and drying to obtain finished product. Said invention also provides the concrete requirements and steps of every procedure.

Description

technical field [0001] The invention relates to a production process of refined cotton, more specifically to a production process of ultra-high-viscosity refined cotton with a viscosity exceeding 800 mPa·s. Background technique [0002] Extra-high-viscosity refined cotton refers to ultra-high-viscosity refined cotton with a viscosity exceeding 800 mPa·s. Mainly used as a chemical thickener, the higher the viscosity, the better the thickening property. The traditional refined cotton production process generally adopts the following production processes: 1), material selection; 2) cooking: put cotton linters into steaming balls, and add alkali; 3), pulp washing: the cooked pulp is washed by rotary pulp; 4), pretreatment before bleaching; 5), bleaching; 6), rolling, dehydrating, and drying to make finished products. Such as: CN1470688A (application number: 02128307.9) discloses a kind of degreasing bleached cotton fiber for spunlace non-woven fabric and its production method....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01C1/00C09K3/00
Inventor 周家贵
Owner 周家贵
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