Paper-making pulping method by using kenaf aggregate

A technology of aggregates and kenaf, applied in the field of papermaking, can solve the problems of lack of kenaf aggregates pulping and papermaking methods, lack of kenaf aggregates, etc.

Active Publication Date: 2011-04-20
SHANGHAI ZHONGWEI BIOCHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is still a lack of pulping or papermaking processes suitable for kenaf aggregates, and there is still a lack of sati

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0072] Example 1

[0073] Raw material: Cut kenaf aggregate about 3-5 cm in length, about 2 to 3 cm in diameter, and the dosage is about 5kg.

[0074] Pretreatment: Put the kenaf aggregate in hot water at 85°C for about 25 minutes, cool it naturally to below 50°C, and then squeeze the kenaf aggregate.

[0075] Chemical treatment: sodium hydroxide dosage is 3.0%; hydrogen peroxide dosage is 5.0%; EDTA is 0.4%; sodium dodecyl sulfonate is 0.02%; MgSO 4 0.15%; anhydrous sodium silicate (Na 2 SiO 3 ) Is 1.0%; PH value is 10.5-11; when the ratio of material to liquid is 1:7; temperature is 80°C and time is 150min.

[0076] Refining: 1.5mm, 0.5mm, 0.15mm, 0.1mm four-stage grinding. During the refining process, the freeness of the pulp is controlled to be 150-450ml.

[0077] Latent elimination: Latent elimination at 90°C for 4 hours to obtain the pulp of kenaf aggregate.

[0078] The paper samples made with this pulp on the Rapid-Kothen automatic sheet forming machine, the tested data are as...

Example Embodiment

[0080] Example 2

[0081] The method is the same as in Example 1, the difference is that the pretreatment, chemical treatment and refining conditions are different.

[0082] Pretreatment: Put the kenaf aggregate in 90℃ hot water for about 20min, add cold water to cool it to about 45℃, and then squeeze the kenaf aggregate.

[0083] Chemical treatment: sodium hydroxide dosage is 5.0%; hydrogen peroxide dosage is 3.0%; EDTA is 0.5%; MgSO 4 0.5%; Na 2 SiO 3 It is 2.0%; PH value is 10.5-11; when the material-liquid ratio is 1:7; the temperature is 90℃ and the time is 90min.

[0084] Refining: 1.5mm, 0.5mm, 01mm three-stage grinding.

[0085] Disinfect the latent at 90°C for 4h to obtain the pulp of kenaf aggregate.

[0086] The paper samples made with this pulp on the Rapid-Kothen automatic sheet forming machine, the tested data are as follows:

[0087] Freeness

Example Embodiment

[0088] Example 3

[0089] The method is the same as in Example 1, the difference lies in the pretreatment, chemical treatment, refining and latent elimination conditions.

[0090] Pretreatment: Put the kenaf aggregate into 95℃ hot water for about 20min, add cold water to cool it to about 45℃, and then squeeze the kenaf aggregate.

[0091] Chemical treatment: sodium hydroxide dosage is 7.0%; hydrogen peroxide dosage is 2.0%; EDTA is 0.15%, MgSO 4 0.5%; Na 2 SiO 3 It is 0.05%; Sodium dodecyl sulfonate 0~0.12%; PH value is 10.5~11; when the ratio of material to liquid is 1:8; temperature is 95℃ and time is 90min.

[0092] Refining: use 0.3mm, 0.15mm, 0.06mm three-stage grinding.

[0093] Latent elimination: the latent elimination at 70 ℃ for 30 min, the speed of 200r / min to obtain the pulp of kenaf aggregate.

[0094] The paper samples made with this pulp on the Rapid-Kothen automatic sheet forming machine, the tested data are as follows:

[0095] Pulp yield

[0096] Bulk

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Abstract

The present invention relates to a paper-making pulping method by using kenaf aggregates. Concretely, the present invention provides a paper-making pulping method by using kenaf aggregates which comprises the following steps: (a) soaking the kenaf aggregates in water or an aqueous solvent at a temperature of 70-100 DEG C for 5-180 min, cooling the soaked kenaf aggregates to the temperature of 5-50 DEG C, and pulverizing to obtain the pulverized kenaf aggregates; (b) soaking the kenaf aggregates obtained through step (a) at a temperature of 70-90 DEG C for 60-300 min with the presence of 2.0-7.0 wt% of sodium hydroxide, 2.0-5.0 wt% of hydrogen peroxide, 0.05-3.0 wt% of sodium silicate, and 0.05-2.0 wt% of magnesium sulfate; (c) performing the refining and latency procedure to the chemically treated pulp so as to obtain kenaf aggregate paper pulp.

Description

technical field [0001] The invention relates to the field of papermaking, in particular to a papermaking and pulping method of kenaf aggregates. Background technique [0002] The demand for paper in China is increasing by 10% year by year. Due to the serious shortage of forest resources in our country. Forest coverage is only 2 / 3 of the global average. Therefore, there is an urgent need to develop non-wood fiber raw materials to replace wood fibers. [0003] Shanghai Zhongwei Biochemical Co., Ltd. applied soil conditioner technology to plant kenaf on salinized and desertified land. Substituting kenaf for trees, since the biomass of kenaf is 3-4 times that of trees, planting kenaf to absorb carbon dioxide has become one of human strategies to prevent global warming; at the same time, it improves the soil and prevents further invasion of desertification and salinization. [0004] At present, the utilization of kenaf mainly includes the direct use of kenaf as raw material t...

Claims

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Application Information

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IPC IPC(8): D21H11/12D21C3/00
Inventor 张士楚王恒新
Owner SHANGHAI ZHONGWEI BIOCHEM
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