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Sunflower stalk pulping technology

A sunflower and pulping technology, applied in the direction of pulping with inorganic alkali, post-treatment of cellulose pulp, pulp beating/refining method, etc., can solve the problems of papermaking cost increase, price increase, output cannot meet demand, etc., and achieve expansion The effect of selecting a range

Inactive Publication Date: 2011-01-19
SHANDONG TAIYANGZHIYE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The lack of raw materials will inevitably lead to an increase in its price, an increase in the cost of papermaking, and the output cannot meet the demand, and even the need to import raw materials and finished products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A sunflower stalk pulping technology, comprising the following steps:

[0015] (1), remove the pith part of the sunflower stalk;

[0016] (2), the remaining stalk bark is crushed to a length of 2 cm and a width of 1 cm;

[0017] (3) Soak the broken stalk skin in hot water at 40°C for 20 minutes, and stir slightly at the same time to mix the broken stalk skin and hot water evenly;

[0018] (4), adding 3% sodium hydroxide relative to the absolute dry weight of the stalk bark, 2% sodium silicate, and reacted for 30 minutes at a temperature of 50° C.;

[0019] (5), after pulping and depotentialization, pulping is ready for use.

[0020] The whiteness of pulp produced by applying this technology reaches 45%, and the bulk thickness reaches 1.80cm 3 / g, tensile index up to 10.0N.m / g, breaking length 1.02Km, tear index 3.00N.m 2 / g, burst index 0.90Kpa.m 2 / g, internal bond strength 70J / m 2 ; It can be used in the production of white cardboard (including coated), kraft li...

Embodiment 2

[0022] A sunflower stalk pulping technology, comprising the following steps:

[0023] (1) Remove the pith part of the sunflower stalk.

[0024] (2), the remaining stalk bark is crushed, with a length of 4 cm and a width of 2 cm;

[0025] (3), soak the broken stalk skin in hot water at 100°C for 200 minutes, and stir slightly at the same time to mix the broken stalk skin and hot water evenly;

[0026] (4), add 10% sodium hydroxide, 5% sodium silicate, 15% hydrogen peroxide, 5% magnesium sulfate, 5% chelating agent (DTPA or EDTA etc.); React 300 minutes under 100 ℃ of temperature.

[0027] (5), after pulping and depotentialization, pulping is ready for use.

[0028] The whiteness of pulp produced by applying this technology reaches 85%, and the bulk thickness reaches 3.80cm 3 / g, tensile index up to 50.0N.m / g, breaking length 5.10Km, tear index 6.00N.m 2 / g, burst index 6.80Kpa.m 2 / g, internal bond strength 900J / m 2 ; It can be used in the production of white cardboard (i...

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Abstract

The invention relates to the technical field of pulping and papermaking, in particular to sunflower stalk pulping technology. The technology comprises that the following steps: after pulp is removed from sunflower stalks, crushing stalk barks into certain sizes; after the crushed stalk barks are pretreated in hot water, adding 3 to 20 percent of sodium hydroxide, 2 to 10 percent of sodium silicate, 0 to 15 percent of hydrogen peroxide, 0 to 5 percent of magnesium sulfate and 0 to 5 percent of chelating agent into the stalk barks; and after preserving the heat for certain time, grinding and digesting the mixture. The whiteness of the sunflower stalk pulp reaches 45 to 85 percent, the bulk reaches 1.80 to 3.80 cm<3> / g, the tensile index reaches 10.0 to 50.0 N.m / g, the fracture length is 1.02 to 5.10 Km, the tear index is 3.00 to 6.00 N.m<2> / g, the burst index is 0.90 to 6.80 Kpa.m<2> / g, and the internal bonding strength is 70 to 900 J / m<2>. The technology can be used for producing whitepaper boards (comprising coating class), paper such as kraft box board paper, corrugated paper and the like and paper boards.

Description

technical field [0001] The invention relates to the technical field of pulping and papermaking, in particular to a sunflower stalk pulping technology. Background technique [0002] At present, in addition to being used as fuel, sunflower stalks are mainly used to extract pectin or crush them to produce plywood; there is no specific research report on its application in pulping and papermaking. With the rapid development of my country's economy, the demand for paper and cardboard has risen sharply, which has led to a serious shortage of commonly used plant fiber raw materials, such as coniferous trees, broad-leaved trees, hemp, cotton, rice straw, reed, bagasse, etc. . The lack of raw materials will inevitably lead to an increase in its price, an increase in the cost of papermaking, and the output cannot meet the demand, and even the need to import raw materials and finished products. Contents of the invention [0003] Aiming at the above problems, the present invention pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H11/12D21B1/02D21B1/06D21C1/02D21C3/02D21D1/20D21C9/00
Inventor 杜艳芬应广东李洪信李树伦王喜鸽姚丽媛杨江红
Owner SHANDONG TAIYANGZHIYE