Study of pulp refining (I) On the exclusion of resin in pulp

Yasusuke Shinomiya

doi:10.2115/fiber1925.18.282

パルプ精製に關する研究(第1報)

パルプ樹脂分の除去に就て

四宮康資

著者情報

ジャーナルフリー

1942 年 18 巻 8 号 p. 282-294

DOI https://doi.org/10.2115/fiber1925.18.282

詳細

発行日: 1942 年受付日: - J-STAGE公開日: 2008/11/27 受理日: 1942/04/15 早期公開日: - 改訂日: -
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訂正日: 2008/11/27 訂正理由: - 訂正箇所: 論文受付日訂正内容: 訂正前 : 19420415

訂正日: 2008/11/27 訂正理由: - 訂正箇所: 論文抄録訂正内容: Wrong : When needle-leaf-trees are used as pulping material, there will be an abominable phenomena, which leads to a pitch trouble in pulp-making, paper-making and artificial Cellulose industries. And by using wood of Manchuria, it is a fact that such a phenomena will be caused especially.
The present author has tried to make the experiment to escape the pitch trouble under the following five testing points.
1. General character of resin.
By studying the difference between the resin in original wood and that after various amounts of work for pulping which led to trouble.
The results obtained are to be seen in the 1st and 2nd table. The resin after various amounts of work for pulping has changed greatly by oxidation, polimerization and combination with salts.
2. Excluding ability for resin by using alkali.
Take a sample of unbleached pulp and add alkali solution in 1, 15, 2, 3, 5%, treating time 3 hours, treating temperature 50°C, while take a sample of-unbleached pulp after chlorination and add alkali Solution 1, 3, 5, 8%, treating time 3 hours, treating temperature 50°C and 85°C-%_??_95°C and examine if above all matters there had been excluding abilities for resin.
The results are as follows in the 3rd, 4th and 5th table.
3. Excluding ability for resin by using “Bentnite”.
Test the following examination, taking advantage of absorbing properties of “Bentnite”.
Add Bentnite with 1, 3, 5, 10%, treating time 1 hour, and there will be found a variation in the colour of resin the results of which are as in table 6.
Table 1.
Composition of natural and Collking-after resin.
Table 2.
Solubility of strong pulp resin on various Solvents.
Table 3.
diminish rate of ash and resin by various concentration of alkali.
Table 4.
diminish rate of Ash and resin by arious concentration of alkali on after chlorination.
Table 5.
Diminish rate of ash and resen by various Concentration of alkali on after chlorination.
4. Variation in quantity of resin by seasoning.
Testing the Cooking process with industrially using various matters that are of the same wood but differ in seasoning, we found a variation in the quantities of unbleached pulp. The results are as in taible 7.
As it is plain in the analytical result of unbleached pulp, we see that there is a great effect upon the composition of pulp by long or short seasoning.
Summarising the above results are as follows.
Table 6.
Diminiss rate of resin by bentnite treatment.
Table 7.
Unbleachable pulu composition by wood seasoning.
1. The wood to be used has been cooked after seasoning as a as posible 18_??_24 months.
2. The washing of the pulp after working has been done with alkali treating.with alkali solution of about 1% or Bentnite treating with Bentnite of about 1% a additions.
3. The above detailed pulp after treating with alkali or Bentnite was chlorinated and then added alkali 3%, treating temperature 85_??_95°C, 3_??_4 hours high temperature the alkali treating has been done.
We found that the improvement of the pulp quality is possible by the above process.

訂正日: 2008/11/27 訂正理由: - 訂正箇所: 著者情報訂正内容: Wrong : Yasusuke Shinoiniya¹⁾
Right : Yasusuke Shinomiya¹⁾

訂正日: 2008/11/27 訂正理由: - 訂正箇所: PDFファイル訂正内容: -

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