STUDY ON NITROGEN COMPOUNDS PRETREMENT TECHNOLOGY IN WHEAT STRAW CMP PROCESSING
The technology of urea-potassium hydroxide for pretreating wheat straw was studied in this paper. The dosages of urea and potassium hydroxide, temperature, time and liquor ratio were investigated in order to produce a chemi-mechanical pulp which the unscreened yield of the pulp was beyond 65％. The process parameter of the pretreatment wheat straw by potassium hydroxide-potassium sulfide technology was studied, the results shown that the chemi-mechanical unscreened yield was 70％ when the dosages of urea, potassium hydroxide and potassium sulfide were 16％, 8％，4％ respectively, and pretreatment temperature, heating time and keeping time at the high temperature were 150℃, 60min, 45min separately. The physical properties of the hand sheet were as follow: the ring crush compression resistance index was 7.87N·m/g, breaking length was 4.52km and the tight degree was 0.58g/cm2, the physical properties had achieved the national standard A grade level (GB/T 2679.6―1996) of the corrugated paper.
wheat straw CMP nitrogen compounds pretreatment urea pretreatment corrugated paper
Junbo Li Qing Han Huijuan Xiu
College of Papermaking Engineering,Shaanxi University of Science and Technology,Xian, 710021, China College of Papermaking Engineering, Shaanxi University of Science and Technology,Xian, 710021, Chin
国际会议
International Mechanical Pulping Conference 2011(2011国际机械浆学术会议)
西安
英文
211-214
2011-06-26（万方平台首次上网日期，不代表论文的发表时间）