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Green pulp bleaching technology

A technology of pulp and process, applied in the field of green bleached pulp process, which can solve the problems of poor hydrogen peroxide bleaching effect, complicated process and high preparation cost

Inactive Publication Date: 2017-10-10
江苏妙卫纸业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The existing pulp bleaching method has a complicated process; the hydrogen peroxide bleaching effect is poor; the bleaching system construction investment is large; the preparation cost is high; there are still certain toxic organic chlorides

Method used

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  • Green pulp bleaching technology

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Embodiment Construction

[0005] combine figure 1 , the more detailed flow process of the inventive method comprises the following steps: a kind of green bleaching pulp process is characterized in that comprising the following steps: the present invention uses non-polluting oxygen and hydrogen peroxide to clean the bleaching agent, through single-stage double-tower oxygen bleaching and activation Pretreatment to achieve high-efficiency bleaching, the activator is sulfite anhydride, cisic anhydride, mannan, succinic anhydride, phthalic anhydride or maleic anhydride.

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Abstract

The invention relates to a green pulp bleaching technology. According to the invention, pollution-free oxygen and hydrogen peroxide clean bleaching agents are subjected to single-segment double-tower oxygen bleaching and activation pretreatment so as to realize efficient bleaching, the bleaching efficiency is high, the whiteness reaches up to 90% or above, and the pollution is less.

Description

technical field [0001] The invention relates to a pulp bleaching method in the pulp and paper industry, in particular to a cleaning bleaching method for wood and grass pulp. technical background [0002] The existing pulp bleaching method has a complicated process; the hydrogen peroxide bleaching effect is poor; the bleaching system construction investment is large; the preparation cost is high; and there are still certain toxic organic chlorides. Contents of the invention [0003] The object of the present invention is to provide a green bleaching pulp process aimed at the defects existing in the existing pulp bleaching technology, which specifically includes: a green bleaching pulp process, which is characterized in that it includes the following steps: the present invention uses non-polluting oxygen and peroxide Hydrogen-cleaning bleaches, high-efficiency bleaching through single-stage two-tower oxygen bleaching and activating pretreatment with sulfite anhydride, cis-ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C9/10D21C9/16
CPCD21C9/10D21C9/163
Inventor 陆泳东
Owner 江苏妙卫纸业有限公司