Preparation method of chemimechanical leaf pulp
A chemical machinery and leaf technology, applied in the field of chemical mechanical pulp preparation, can solve the problems of restricting the healthy development of the paper industry, lack of wood fiber resources, and poor quality of domestic waste paper, so as to alleviate the tension of fiber resources, protect the natural environment, The effect of low production cost
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Embodiment 1
[0025] Select poplar leaves as raw materials, wash and remove dust, cut into small pieces with a length and width of 2-4 cm, and set aside. Stand-by raw materials are placed in the reactor, adding concentration is 8% sodium hydroxide aqueous solution, control solid-liquid ratio is 1:5, be warming up to 90 DEG C, process 60 minutes. The alkali-treated raw material is taken out, filtered and washed, rubbed and extruded by a kneading machine to separate the mesophyll from the veins, and screened; after screening, the weight ratio of the mesophyll to the raw material is controlled to be less than 40%. Adjust the concentration of the screened raw materials to 25%, and use a high-consistency refiner to perform two-stage refining treatment. The first stage controls the disc refiner gap to 0.8-1.0 mm, and the second stage controls the disc refiner gap to 0.25-0.3 mm. Control the beating degree of the milled slurry at 45-55 SR.
[0026] The slurry obtained in this embodiment can be us...
Embodiment 2
[0028] Wash and remove the leaves of magnolia leaves and sycamore leaves, cut into small pieces with a length and width of 2-4 cm, mix them according to the weight ratio of 60:40 (dry weight), and set aside. Put the spare raw materials in the reaction kettle, add a mixed aqueous solution of sodium hydroxide and sodium carbonate with a concentration of 10% (solute mass ratio 1:1), control the solid-liquid ratio to 1:4, heat to 85 ° C, and treat for 90 minutes . The processed raw materials are taken out, filtered and washed, rubbed and extruded by a kneading machine to separate the mesophyll from the veins, and screened; after screening, the weight ratio of the mesophyll to the raw materials is controlled to be less than 25%. Adjust the concentration of the screened raw materials to 20%, and use a high-consistency refiner to perform two-stage refining treatment. The first stage controls the disc refiner gap to 0.6-0.8 mm, and the second stage controls the disc refiner gap to 0.3...
Embodiment 3
[0031] Choose linden leaves as raw materials, wash and remove dust, cut into small pieces with a length and width of 2-4 cm, and set aside. Put the spare raw materials in the reaction kettle, add a mixed aqueous solution of sodium hydroxide and sodium bicarbonate with a concentration of 15% (solute ratio 2:1), control the solid-liquid ratio to 1:4.5, heat to 90°C, and process for 120 minutes . The processed raw materials are taken out, filtered and washed, rubbed and extruded by a kneading machine to separate the mesophyll from the veins, and screened; after screening, the weight ratio of the mesophyll to the raw materials is controlled to be less than 10%. Adjust the concentration of the screened raw materials to 15%, and use a high-consistency refiner to perform two-stage refining treatment. The first stage controls the disc refiner gap to 0.5-0.6 mm, and the second stage controls the disc refiner gap to 0.2-0.3 mm. Control the beating degree of the milled slurry at 35-40 S...
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