Method for treating paper pulp by using 1-butyl-3-methylimidazole chloride
A methyl imidazole and chloride technology is applied in the field of pulp processing to achieve the effects of improving fiber quality, improving physical indicators and simple operation
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Embodiment 1
[0015] The bagasse chemical pulp is conventionally beaten to a beating degree of 38.0°SR, the beating energy consumption is 420kW·h / t pulp, the fiber length is 1.18mm, and the fine component content is 14.2%. Use this slurry to make quantitative 68g / m 2 Cultural paper, the bulk thickness of the finished paper is 1.85cm 3 g -1 , whiteness 80.2% ISO, burst index 1.75KPa m 2 g -1 , Tensile index 45.8N m / g, folding number 356 times, tear index 4.58mN m / g 2 g -1 , the pulling speed is 1.12m / s, and the K&N value is 20.5.
[0016] The method of the invention is adopted to process the bagasse chemical pulp. Steps: Before beating, the pulp is concentrated, dried and dehydrated to a moisture content of 1.9%, and then the pulp is treated with 1-butyl-3-methylimidazolium chloride, and the treatment conditions are: 1-butyl-3-methylimidazolium chloride The dosage is 12L / kg slurry, the steam is indirectly heated, the temperature is 80°C, and the time is 120min. The pulp is washed aft...
Embodiment 2
[0019] Poplar high-yield pulp is beaten to a beating degree of 52.0°SR, the beating energy consumption is 1095kW·h / t pulp, the fiber length is 1.01mm, and the fine component content is 22.8%. Use this slurry to make paper with a weight of 70g / m 2 , the bulk thickness of the paper is 3.24cm 3 g -1 , whiteness 78.3% ISO, burst index 2.38KPa m 2 g -1 , tensile index 33.5N m / g, tear index 3.28mN m / g 2 g -1 , the pulling speed is 0.72m / s, and the K&N value is 25.3.
[0020] The method of the invention is used to treat the poplar high-yield pulp. Steps: after a period of rough refining, the poplar high-yield pulp is treated, the pulp is first concentrated, dried and dehydrated to a moisture content of 1.7%, and then the pulp is treated with recovered 1-butyl-3-methylimidazolium chloride, The dosage is 6L / kg pulp, microwave heating, temperature 100°C, time 80min, pulp is washed after treatment, and the removed 1-butyl-3-methylimidazolium chloride continues to be recycled.
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Embodiment 3
[0023] The taeda pine chemical pulp was conventionally beaten to a beating degree of 53.0°SR, the beating energy consumption was 545kW·h / t pulp, the fiber length was 2.41mm, and the fine component content was 8.2%. Use this slurry to make quantitative 70g / m 2 Cultural paper, the bulk thickness of the finished paper is 1.91cm 3 g -1 , whiteness 81.8% ISO, burst index 2.72KPa m 2 g -1 , Tensile index 46.2N m / g, folding number 487 times, tear index 6.04mN m 2 g -1 , the pulling speed is 1.21m / s, and the K&N value is 20.2.
[0024] The method of the invention is used to treat the taeda pine chemical pulp. Steps: Concentrate, dry and dehydrate the pulp to a moisture content of 1.5% before beating, and treat the pulp with 1-butyl-3-methylimidazolium chloride, and the treatment condition is the amount of 1-butyl-3-methylimidazolium chloride 5L / kg pulp, microwave heating, temperature 140°C, time 100min, wash the pulp after treatment, and recover 1-butyl-3-methylimidazolium chlo...
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