硫酸ナトリウムと二酸化硫黄を蒸解薬液とするケミメカニカルパルプ（ＳＯＸ）パルプ　ＩＩ　　わらのＳＯＸパルプ

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書誌事項

タイトル別名
  • Sodium Sulphate-Sulphur Dioxide Chemimechanical Process (SOX)-II
  • リュウサン ナトリウム ト 2サンカ イオウ オ ジョウカイ ヤクエキ ト ス
  • わらのSOXパルプ, パルプ廃液の完全処理と利用に関する研究 (V)

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抄録

High yield pulp prepared from rice straw by SOX process was studied. <BR>Rice straw contained 2.6% alcohol benzene soluble, 16.1% hot water soluble, 46.6% of 1% sodium hydroxide aq, sol. soluble, 27.1% of 1% hydrochloric acid aq. sol. soluble, 51.1% holocellulose, 37.3% α-cellulose, 20.0% pentosan, and 13.1% lignin. <BR>Rice straw were lightly heated in aqaous acidic solution of sodium sulphate and sulphur dioxide (liquor ratio 10 l/kg, as Na2O 60 g/l, SO2 O 60 g/l, 105145°C, 1 hr) and then mechanically treated with a single disk refiner.<BR>Rice straw SOX pulp (SOXP) is comparatively tough in spite of high yield (4774%) SOX 221 (yield 74.1%) gave higher yield and stronger pulp than RMP (yield 62.0%). <BR>SOX 223 (yield 59.7%) gave 19.7% ash, 13.7% pentosan, and Kappa number of 85.7.<BR>Hand sheets prepared from SOXP by Tappi standard method (CSF 330 ml) showed 3.29 km breaking length, 1.55 burst factor, 33.0 tear factor, 13.9 kg strength in ring crush test. <BR>Yield and components of SOXP was varied by cooking condition and concentration of sulphur dioxide and sodium sulphate in cooking liquor. <BR>The yield decreased by sulphur dioxide concentration, and increased by decreasing of sodium sulphate concentration.<BR>Ash content of SOXP was very high (1122%), and c.a. 98% of ash was silica. Ash content increased by decreasing of sulphur dioxide and decreased by increasing of sodium sulphate concentration in cooking liquor. Pentsan content (523%) of SOXP increased by decreasing of sodium sulphate, and decreased by increasing of sulphur dioxide concentration in cooking liquor. Kappa number of (6191) of SOXP decreased by increasing of sulphur dioxide.

収録刊行物

  • 紙パ技協誌

    紙パ技協誌 33 (12), 796-805, 1979

    紙パルプ技術協会

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