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Chemistry and Industry of Forest Products ›› 2015, Vol. 35 ›› Issue (3): 80-84.doi: 10.3969/j.issn.0253-2417.2015.03.014

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Application of Hydrophobic Carboxymethyl Cellulose in Deinking

BEI Jun-jie, CAO Yun-feng   

  1. Jiangsu Provincial Key Laboratory of Pulp and Paper Science and Technology, Nanjing Forestry University, Nanjing 210037, China
  • Received:2014-04-08 Online:2015-06-25 Published:2015-07-03

Abstract: Lauroyl chloride esterified carboxymethyl cellulose(CMC-R) was prepared by carboxymethyl cellulose (CMC) and lauroyl chloride in the presence of triethylamine as acid binding agent and DMAc as solvent.The optimized CMC-R could be obtained as thecarboxymethyl cellulose reacted with lauroyl chloride with a ration of 1:0.4 (m/m) at 60 ℃ for 5 h.CMC-R was utilized in old news paper (ONP) deinking. The results revealed that individual application of CMC-R could improve the pulp brightness by 2.2%(ISO),and the residual ink decreased by 457.66 mm2/m2.Another increase of pulp brightness by 2.13% and reduction of residual ink by 3.18% could be realized when CMC-R and non-ionic surfactants were utilized together.

Key words: carboxymethyl cellulose, surfactant, ONP, deink

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