固状リグノスルフォン酸生成(初期スルフォン化)反應の動力學的研究 (その1)

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  • 軒原 榮三
    国策パルプ工業株式会社附属農林科学研究所

書誌事項

タイトル別名
  • Kinetics of the Formation of Solid Lignosulphonic Acid (The First Stage Sulphonation in Sulphite Cooking) I
  • コジョウ リグノスルフォンサン セイセイ ショキ スルフォンカ ハンノウ ノ ドウリキガクテキ ケンキュウ 1 サルファイト ジョウカイ ノ ケンキュウ
  • Studies on the Sulphite Cooking. Part 1
  • サルファイト蒸解の研究第1報

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抄録

As the preliminary experiment for the kinetics of the formation of solid lignosulphonic acid (the first stage of the sulphite cooking on the Hägglund's theory), spruce wood meal (100 mesh, extracted with alcohol-benzene) was cooked with the following liquors at 135°, 0 to 5 hrs; (A) 15% Na2SO3 (pH 9.0), (B) 12% Na2SO3+3%NaHSO3 (pH 6.3), (C) 15% NaHSO3 (pH 4.4) and (D) neutral buffer solution (NaOH-KH2PO4; pH 7.0).<br> The amounts of resoluted lignin in 5 hrs. cooking with liquors (A)_??_(C) were 3_??_6% of dry wood meal. The lowest amount was for the cooking with the liquor (B). On the other hand, there was no difference among first stage cookings with three liquors in relation to the inactivation of lignin for the second stage delignification (cooking with industrial cooking liquors). Consequently, the author would use the liquor (B) for the study of the kinetics of the formation of solid lignosulphonic acid.<br> The author recognized in the determination of lignin with chlorine-water at 0°C (OKADA's method), the pretreatment of the coarse wood meal with 5% NaOH solution in boiling water bath (1 hr.) was the most adequate in order to let chlorine-water penetrate into wood meal.

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