Preparation method of paper machine wet end interpolation Xylo-Mucine and products thereof

Preparation method of paper machine wet end interpolation Xylo-Mucine and products thereof

  • CN 102,417,541 B
  • Filed: 10/18/2011
  • Issued: 10/21/2015
  • Est. Priority Date: 10/18/2011
  • Status: Active Grant
First Claim
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1. a preparation method for paper machine wet end interpolation Xylo-Mucine, is characterized in that:

  • described preparation method'"'"'s step is as follows;

    (1) Mierocrystalline cellulose and alkali-ol mixed solution are joined in kneader alkalize, temperature controls at 20 ~ 40 DEG C, alkalize 30 ~ 90 minutes, described alkali-ol mixed solution is formed by the NaOH solution of mass concentration 45 ~ 50% and the ethanolic soln mixture of mass concentration 80 ~ 95%, wherein the mol ratio of Mierocrystalline cellulose and NaOH controls 1;

    1.8 ~ 4.0, and the weight ratio of Mierocrystalline cellulose and ethanolic soln is 1;

    1 ~ 3;

    (2) after alkalization terminates, with the ethanolic soln of etherifying agent in kneader, the ethanolic soln joining day of etherifying agent is 10 ~ 40 minutes, adding temperature controls at 30 ~ 50C, then 78 ~ 80 DEG C of etherification reactions 50 ~ 80 minutes are warming up to, etherifying agent and cellulosic mol ratio are 0.5 ~ 1.0;

    1, before the ethanolic soln of etherifying agent adds or after adding, in kneader, add organic acidulant neutralize, carry out etherification reaction again, the add-on of organic acidulant is 15 ~ 50% of cellulose, described organic acidulant is selected from acetic acid, formic acid, citric acid, one in propionic acid, the mol ratio of etherifying agent and the middle NaOH of step (1) is 1;

    3.1 ~ 5.0,(3), after etherification reaction terminates, regulate pH to 6.5 ~ 8.5, then through washing, dry, pulverize, sieve, obtain the Xylo-Mucine that substitution value is 0.4 ~ 0.46;

    In the ethanolic soln of the etherifying agent described in step (2), the weight percent of etherifying agent is 60 ~ 80%, and etherifying agent is Mono Chloro Acetic Acid;

    In step (2), the joining day of organic acidulant is 10 ~ 40 minutes;

    Step (1) Mierocrystalline cellulose joins before in kneader, first that Mierocrystalline cellulose shredding is extremely cotton-shaped.

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