Degumming and pulping method for broussonetia papyrifera phloem fiber

A technology of bast fiber and paper mulberry, which is applied in the field of degumming and pulping of paper mulberry bast fiber by selecting biological enzymes as catalysts, can solve the problems of serious environmental pollution, low product yield, difficult recovery and treatment, etc., so as to reduce environmental pollution. , broad application prospects, and the effect of improving resource utilization

Inactive Publication Date: 2008-04-30
大连中植环境生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the past, the bast fiber of the tree was degummed by adding alkali to obtain the fiber raw material required for papermaking. However, the fiber will be damaged and corroded by alkali to varying degrees, resulting in a very l

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Embodiment 1, the pectinase degumming pulping of hybrid mulberry bast fiber

[0011] Select the bast part of the hybrid tree, make it into fiber bundles, add tap water at a mass ratio of 1: 10, adjust the pH value to 7 with lime water, add fiber bundles and water total volume 0.2% pectinase solution (pectinase solution Vitality is 100U / ml) and kept at 50°C for 10 hours, during which time the fiber bundles were taken out for observation, and the degumming was completed when it was torn into a net by hand. The degumming wastewater is removed, washed with clean water and dried to obtain fiber raw materials for papermaking.

[0012] Here, the activity of the pectinase solution is defined as: 1ml of liquid enzyme catalyzes the hydrolysis of pectin to generate 1 microgram of galacturonic acid per minute under the conditions of 50.0°C and pH 3.5, which is an activity unit.

[0013] It is determined that after degumming and pulping the hybrid bast fiber by the above method, th...

Embodiment 2

[0014] Embodiment 2, the pectinase degumming pulping of hybrid mulberry bast fiber

[0015] Select the bast part of the hybrid tree, make it into fiber bundles, add tap water at a mass ratio of 1: 12, adjust the pH value to 8 with lime water, add fiber bundles and water total volume 0.1% pectinase solution (pectinase solution Vitality is 100U / ml), kept at 60°C for 5 hours, during which time the fiber bundle was taken out and observed until it was torn into a net by hand, that is, the degumming was over. The degumming wastewater is removed, washed with clean water and dried to obtain fiber raw materials for papermaking.

[0016] It is determined that after degumming and pulping the hybrid bast fiber by the above method, the yield of the obtained fiber raw material for papermaking is 71.5%.

Embodiment 3

[0017] Embodiment 3, pectinase degumming and pulping of wild pectinase bast fiber

[0018] Choose wild mulberry bast part, make it into fiber bundle, add tap water by mass ratio 1: 15, adjust pH value 9 with lime water, add the pectinase solution (pectinase solution) of fiber bundle and water total volume 0.1% Vitality is 100U / ml), was incubated at 60°C for 8 hours, during which the fiber bundle was taken out and observed until it was torn into a net by hand, that is, the degumming was over. The degumming wastewater is removed, washed with clean water and dried to obtain fiber raw materials for papermaking.

[0019] It has been determined that after degumming and pulping the hybrid bast fiber by the above method, the yield of the obtained fiber raw material for papermaking is 72%.

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Abstract

The invention discloses a novel method for degumming a paper mulberry bast fiber for pulping, which performs degumming to aqueous solution of the paper mulberry bast fiber for pulping at a temperature of 30 to 60 DEG C and by pectinase; the pH value of the aqueous solution of the paper mulberry bast fiber is 5 to 9. The degumming method provided by the invention fundamentally eliminates the pollution problem generated by a chemical degumming method, has no chemical residue in the waste water negated by degumming, and has no pollution to the environment; in addition, the utilization rate of the raw materials is increased by 5 percent compared with the prior chemical method, the fiber raw material used for paper making and obtained after the degumming fully meets the requirement of pulp paper making, and the obtaining rate is above 70 percent and is increased by 15 percent compared with the prior art. The method realizes that the environmental pollution while increasing the utilization rate of resource is reduced. The method has wide application prospect.

Description

technical field [0001] The invention relates to a method for degumming and pulping bast fiber of mulberry, in particular to a method for degumming and pulping bast fiber of mulberry by selecting biological enzyme as a catalyst. Background technique [0002] In the past, the bast fiber of the tree was degummed by adding alkali to obtain the fiber raw material required for papermaking. However, the fiber will be damaged and corroded by alkali to varying degrees, resulting in a very low product yield. In addition, the degumming process A large amount of waste water will be produced in the process, which is difficult to recycle and treat, and the environmental pollution is serious, so the process is strictly limited. For this reason, it is urgent to develop a new, efficient and environmentally friendly production process to replace the existing process. Contents of the invention [0003] The purpose of the present invention is to provide a method for degumming and pulping bas...

Claims

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Application Information

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IPC IPC(8): D21C3/00C12S3/08
Inventor 何连芳刘秉钺熊伟
Owner 大连中植环境生物科技有限公司
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