Hybrid penisetum NaOH-AQ method for pulp making, bleaching and paper forming

A hybrid pennisetum, pulping and papermaking technology, applied in pulp bleaching, plant products, pulping with inorganic alkali, etc., can solve the problems of high cost, large purchase radius, poor quality, etc., to improve quality and reduce energy consumption , The effect of solving the shortage of papermaking raw materials

Inactive Publication Date: 2006-09-06
王洪宾
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The contradiction between supply and demand of papermaking raw materials is becoming increasingly prominent, especially for manufacturers that mainly u

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Material preparation: cut off the roots and leaves of the hybrid pennisetum, keep the main stem and some leaves, cut into 3-5cm long material sections, air dry, put them in plastic bags to balance the water, and set aside;

[0029] (2) Cooking: the hybrid Pennisetum forage section prepared in step (1) is packed into a multi-pot digester with 8 cooking pots, and glycerin is used as a heating medium, and the potting amount is 100g dry material / L, the amount of adding NaOH is 18%, the amount of anthraquinone is 0.02%, the liquid ratio is 1: 6, the maximum temperature is 160 ° C, and the holding time is 2 hours, the cooking is carried out;

[0030] (3) Bleaching: After the cooked slurry is washed and squeezed dry, it is dissociated in a fiber dissociation machine for 1-3 minutes to disperse the fibers, and the sieve plate with a sieve of 0.3mm is selected to be screened on a vibrating sieve of Φ300mm Finally, balance the water, add sodium hypochlorite to carry out sing...

Embodiment 2

[0034] Same as the steps in Example 1, except that the amount of NaOH added in step (2) is 20%, the amount of anthraquinone is 0.05%, the liquid ratio is 1: 7, and the maximum temperature is 160°C

[0035] After testing, all the indicators of the finished paper are in line with the national standard requirements of white board paper. The measurement results are shown in Table 1 below.

[0036] bleached pulp

Embodiment 3

[0038] Same as the steps in Example 1, except that in step (3), the two-stage bleaching is used to replace the single-stage bleaching, the total amount of available chlorine is 10g / L, and the total bleaching time is 5 hours. The effective chlorine dosage ratio of the two stages is 6:2, and the bleaching time ratio of the two stages is 1:1.

[0039] After testing, all the indicators of the finished paper are in line with the national standard requirements of white board paper.

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PUM

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Abstract

The invention discloses the method for making the product with crossing pennisetum alopecuroides NaOH-AQ method. The method uses crossing pennisetum alopecuroides as raw material, pulping, bleaching, and getting the product with paper machine. The method can solves the problem that the raw material is in short supply, reduce energy consumption and improve quality. The invention can be used for making laundry paper board and book and periodicals paper or double adhesive tape. The physical property indexes amount to the national standard. Compared with the 75% national standard, the white content of planograph book and periodicals paper is 88.77%.

Description

technical field [0001] The invention relates to a pulping and papermaking method and its products, in particular to a pulping and papermaking method using hybrid pennisetum as a raw material NaOH-AQ method for pulping, bleaching, offset printing book paper and offset paper. Background technique [0002] In recent years, my country's paper industry has developed rapidly, and it is one of the few industries in which consumption growth is greater than production growth. my country is a big country in the world for pulping and papermaking of non-wood fiber raw materials. More than 70% of the paper and cardboard produced in my country are made of non-wood fiber raw materials. The use of straw pulp for papermaking has a long history, mature technology, and numerous production equipment. In order to promote the paper industry Development played an important role. As the production and consumption of paper and cardboard continue to increase, the supply of pulp is decreasing day by d...

Claims

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Application Information

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IPC IPC(8): D21H11/12D21C3/02D21C1/00D21C9/12D21B1/00A01H1/02A01H5/00
Inventor 王洪宾
Owner 王洪宾
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