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Chlorineless bleaching paper pulp producing process using pith removed corn stalk as raw material

A chlorine-free bleaching and pulping technology, applied in the field of papermaking, can solve the problems of lack of materials and unfavorable people's survival, and achieve the effect of reliable resources and easy management

Inactive Publication Date: 2004-10-06
SHENYANG SHENNONG GREEN FERTILIZER GARBAGE TREATMENT
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The paper industry uses a lot of wood, which will deplete wood materials sooner or later, which is not conducive to people's survival, but there is currently no better material to replace wood; in addition, all paper bleaching in the past was done with CL 2 and CLO 2 For bleaching, there are highly toxic dioxin substances in the pulp bleached by chlorine-containing chemicals and in the wastewater discharged during the bleaching process

Method used

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  • Chlorineless bleaching paper pulp producing process using pith removed corn stalk as raw material
  • Chlorineless bleaching paper pulp producing process using pith removed corn stalk as raw material
  • Chlorineless bleaching paper pulp producing process using pith removed corn stalk as raw material

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Embodiment Construction

[0024] Step 1: Ingredients and Cooking

[0025] Use whole corn stalks (without pith removal) to make paper, cut (shred) the stalks, and then use water power to remove the pith, so not only does it consume more water, but the most important thing is that the pith removal is not clean, and the corn pith enters the cooking system, which requires more consumption NaOH. Because the pith contains too much sugar and pectin, the quality of the cooked pulp is not high, which causes great trouble to the subsequent process, consumes a lot of chemicals, the yield is low, the pulp is not well filtered, the yield is low, and the quality is poor. Influence the development of cornstalk as a raw material for papermaking. The demyelination technology that the present invention adopts just overcomes this disadvantage.

[0026] The second step: pulping TCF (Totally chlorine Free) bleaching process

[0027] There are two technical points in this process: one is to squeeze the pulp thoroughly, a...

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Abstract

A process for preparing pulp from the non-pith corn stalk and bleaching it without use of chlorine includes removing pith and leaves from corn stalk, cutting in to stalk pieces with 20-30 mm length digestion and PO bleaching twice. Its advantages are no need of wood and no chlorine pollution.

Description

Technical field: [0001] The invention belongs to the papermaking technology of making paper pulp with corn stalks removed as raw materials. Background technique: [0002] The paper industry uses a lot of wood, which will deplete wood materials sooner or later, which is not conducive to people's survival, but there is no better material to replace wood at present; in addition, all paper bleaching in the past uses CL 2 and CLO 2 For bleaching, there are highly toxic dioxin substances in the pulp bleached by chlorine-containing chemicals and in the wastewater discharged during the bleaching process. Invention content: [0003] The present invention solves the problem that there is no better material to replace wood pulp and the pollution caused by chlorine-containing chemical bleaching, and provides a good material that can replace wood to make pulp and a process that avoids chlorine-containing chemical bleaching. [0004] The technology that the present invention adopts is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C3/02D21C9/16
Inventor 姜宇坤罗少初
Owner SHENYANG SHENNONG GREEN FERTILIZER GARBAGE TREATMENT
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