Alkaline peroxide treatment of rejects in an integrated neutral-alkaline paper mill

Alkaline peroxide treatment of rejects in an integrated neutral-alkaline paper mill

  • CN 102,459,753 A
  • Filed: 06/09/2010
  • Published: 05/16/2012
  • Est. Priority Date: 06/15/2009
  • Status: Active Application
First Claim
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1. one kind is used for the method that processing machine is starched, and may further comprise the steps:

  • A) cellulosic material that is obtained by cork or hardwood is provided;

    B) with being used to change into the main line slurry in this main line defibrination system of cellulosic material introducing;

    C) from this main line slurry by screening or hierarchical processing and isolate elimination product;

    D) neutrality-alkaline plain boiled water stream is mixed with said elimination product and form a kind of elimination product fiber, it is recirculation from a paper technology that this plain boiled water flows, be substantially free of oxidable sulfur species and comprise a kind of buffer;

    E) a kind of treat liquid of hydrogen peroxide and a kind of alkali that comprises is added in the said elimination product fiber, wherein to be based on fiber be from about 0.35/1.0 to about 1.5/1.0 less than the ratio of about 3.5% (on 100% basis) and alkali and hydrogen peroxide to the value of alkali by weight;

    AndF) will be used for controlling the plain boiled water stream that a kind of chelating agent of the harmful metal ion of hydrogen peroxide is added said elimination product fiber and said neutrality-alkalescence.

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