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Chinese yew pulp and preparation method thereof

A technology of yew and fir pulp, applied in pulp bleaching, natural cellulose pulp/paper, textiles and papermaking, etc., can solve the problems of low added value, difficult production, thin branches, etc., and alleviate the shortage of raw materials , less impurities and high cellulose content

Active Publication Date: 2014-04-16
潍坊欣龙生物材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the stalks of yew are mostly used as fuel, and the added value of utilization is not high
Although the yew stem contains about 50% cellulose, the branches are thinner and the strength is higher. It is very difficult to produce according to the conventional pulping process, so it has not been used as a raw material for regenerated cellulose fiber at present.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Preparation: Cut the peeled yew into 4cm pieces, and rub them with a rubbing and shredding machine.

[0023] Pre-dipping: After rubbing, add 0.6wt% potassium hydroxide solution relative to absolute dry size, the amount added should be enough to wet the yew silk, heat to above 70°C, and then soak at 60°C for 2 hours.

[0024] Biological enzyme treatment: squeeze out the water after presoaking, add a compound enzyme composed of lignin peroxidase and manganese peroxidase at a mass ratio of 5:1, and soak at 50°C for 30h.

[0025] Refining: the refining concentration is 25wt%, using three-stage refining discs for refining, wherein the clearance of the first refining disc is 0.5mm, the clearance of the second refining disc is 0.3mm, and the clearance of the third refining disc is 0.05mm.

[0026] Alkali cooking: add 0.01wt% of the absolute dry pulp to the cooking aid green oxygen, the cooking liquid ratio is 1:2.5, the alkali rate is 12wt% relative to the absolute dry pulp, ...

Embodiment 2

[0031] Preparation: Cut the peeled yew into 6cm pieces, and rub them with a rubbing and shredding machine.

[0032] Pre-soaking: After rubbing, add potassium hydroxide solution with a relative absolute dry size of 1.0wt%, the amount added should be enough to soak the yew silk, heat to above 70°C, and then soak at 30°C for 4 hours.

[0033] Biological enzyme treatment: squeeze out the water after presoaking, add a compound enzyme composed of lignin peroxidase and manganese peroxidase at a mass ratio of 5:4, and soak at 35°C for 40 hours.

[0034] Refining: the refining concentration is 30wt%, using three-stage refining discs for refining, wherein the clearance of the first refining disc is 0.5mm, the clearance of the second refining disc is 0.3mm, and the clearance of the third refining disc is 0.05mm.

[0035] Alkali cooking: Add green oxygen as a cooking aid at 1 wt% of the absolute dry pulp, the cooking liquid ratio is 1:4, the alkali rate is 16 wt% relative to the absolute...

Embodiment 3

[0040] Preparation: Cut the peeled yew into 5cm pieces, and rub them with a rubbing and shredding machine.

[0041] Pre-soaking: After rubbing, add 0.8wt% potassium hydroxide solution relative to absolute dry size, the amount added should be enough to wet the yew silk, heat to above 70°C, and then soak at 45°C for 3 hours.

[0042] Biological enzyme treatment: after presoaking, squeeze out the water, add a compound enzyme composed of lignin peroxidase and manganese peroxidase at a mass ratio of 5:3, and soak at 40°C for 35 hours.

[0043] Refining: the refining concentration is 28wt%, using three-stage refining discs for refining, wherein the clearance of the first refining disc is 0.5mm, the clearance of the second refining disc is 0.3mm, and the clearance of the third refining disc is 0.05mm.

[0044] Alkali cooking: add 0.5wt% of the absolute dry pulp amount of cooking aid green oxygen, the cooking liquid ratio is 1:3, the alkali rate is 14wt% relative to the absolute dry ...

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Abstract

The invention discloses Chinese yew pulp and a preparation method thereof. Chinese yew stalks are used as raw materials, shredded by a rolling and grinding shredding machine and then added into the potassium hydroxide solution for pre-impregnation, water is squeezed out after pre-impregnation, complex enzyme comprising lignin peroxidase and manganese peroxidase according to the mass ratio of 5:1-4 is added into the solution, the Chinese yew stalks are soaked for 30-40h at the temperature of 35-50 DEG C, alkali cooking is performed after defibrination, total chlorine free bleaching is performed after shoving, cleaning, screening and impurity removal, and then paper is manufactured with pulp after acid treatment, washing and desanding, so that the Chinese yew pulp is prepared. A using approach with a high added value is provided for the Chinese yew stalks, the application field of the Chinese yew stalks is widened, a low-pollution mature production process is provided for preparing dissolving pulp and regenerated cellulose fibers with the Chinese yew stalks, and shortage of regenerated cellulose fiber raw materials at present is relieved.

Description

technical field [0001] The invention relates to the technical field of viscose fiber, in particular to a pulp prepared from yew as a raw material and a preparation method thereof. Background technique [0002] As a textile raw material, regenerated cellulose fiber is deeply loved by consumers due to its light texture, smoothness, softness and comfort. The raw materials of regenerated cellulose fiber are mainly cotton linters, wood, bamboo and hemp. Due to the high price of cotton linters in the past two years, the profit margin of regenerated cellulose fibers has been reduced. Due to the limited forest area in our country, a large amount of wood is also required for papermaking, and the wood production cycle is long, resulting in less and less wood resources; and some hemp and bamboo can be directly spun after degumming and delignification, but with The production of regenerated cellulose fibers from hemp and bamboo after pulping is relatively polluting to the environment. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H11/00D21C5/00D21C1/06D21C9/16
Inventor 张志鸿王乐军马君志秦翠梅姜明亮王东
Owner 潍坊欣龙生物材料有限公司
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