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The production method and pulp maked bamboos

A technology of cellulose pulp and bamboo, which is applied in the direction of pulping of cellulose raw materials, pulp bleaching, and fiber raw materials, and can solve problems such as fiber fragility, medicines, energy consumption, increased production costs, and durability issues

Inactive Publication Date: 2006-11-01
李权革
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the lack of consideration of the dense structural characteristics of bamboo, satisfactory pulp was not obtained, and the consumption of chemicals and energy was high, and the bleaching treatment was carried out under strong conditions, so not only the productivity was low, but also the decomposition and damage of fibers were caused. The problem of fiber fragility
[0007] In addition, chlorine bleaching using elemental chlorine in the bleaching process is responsible for the generation of dioxins
In addition, since bleaching powder, which has a corrosive effect on the device, is used as the bleaching chemical, many problems have been caused to the durability of the manufacturing device.
Therefore, this technological problem leads to the increase of medicine, energy consumption and production cost per unit of pulp produced

Method used

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  • The production method and pulp maked bamboos
  • The production method and pulp maked bamboos

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Bamboo from Myanmar is finely cut to a width of approximately 2mm and cut to a length of 15-25mm, and is screened with a mesh drum with 60 meshes to remove pollutants and bamboo residue, followed by washing.

[0058]Take out the amount corresponding to 400g of dried bamboo slices from the washed bamboo and put it into the cooking section, and inject water to adjust the liquid ratio to 6:1, then place a stainless steel weight on it to fully immerse the bamboo in the water.

[0059] After closing the lid of the cooking section and screwing on the screws, pre-hydrolyze at 170°C for 90 minutes.

[0060] After washing the undissolved matter after pre-hydrolysis, put it into the cooking section again, and add 16% of active alkali (converted to Na 2 O), 0.1% of anthraquinone and after adjusting the liquid ratio to be 4: 1, cook at 170° C. for 120 minutes.

[0061] The washed and cooked pulp was bleached in four stages of DEDD, and the pulp characteristics obtained as a result...

Embodiment 2

[0065] The treatment of bamboo and most of the conditions are the same as in Example 1, while the prehydrolysis conditions and bleaching conditions are as follows.

[0066] During pre-hydrolysis, adjust the liquid ratio to 4:1, and pre-hydrolyze at 170° C. for 100 minutes.

[0067] The four stages of DEDP bleaching were performed on the cooked and washed pulp, and the pulp characteristics obtained as a result are shown in Table 2.

[0068] Yield of pulp before bleaching (%)

37.8

kappa number *

9.8

Yield of pulp after bleaching (%)

36.2

Whiteness (%ISO)

86.2

Alpha cellulose (%)

95.4

Viscosity (cps)

5.1

Polymerization

821

[0069] As mentioned above, the present invention is easy to carry out pre-hydrolysis and cooking by splitting longitudinally and cutting transversely, so that cellulose (dissolving) pulp can be produced under milder conditions, and bamboo pulping is adopted i...

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Abstract

The present invention relates to a kind of method that utilizes bamboo to make paper pulp, relate to firstly splitting bamboo vertically and transversely and then going through the process of screening and washing to reduce the consumption of medicines in the process of prehydrolysis and pulping and make it easy to react, thereby A method of making pulp from bamboo and its pulp that can produce better-quality, higher-yield dissolving pulp, and that can prevent the generation of dioxins by using the bleaching method of ECF or TCF. Since the anthraquinone caustic soda method using anthraquinone as a catalyst is used in the cooking process, the effects of improving delignification and pulp quality and increasing pulp yield are obtained. Also, the content and degree of polymerization of α-cellulose can be arbitrarily adjusted according to the characteristics of the man-made fibers produced as desired by adjusting the conditions of prehydrolysis, cooking and bleaching. At the same time, by recovering xylose produced in the dissolving pulp manufacturing process, it is used to manufacture xylitol, seasoning, furfural, etc., thereby contributing to the improvement of resource utilization and economic efficiency of waste.

Description

technical field [0001] The present invention relates to a method of utilizing bamboo to produce dissolving pulp, in particular to a method of utilizing bamboo to produce cellulose (dissolving) pulp and the pulp thereof. Hemicellulose is bleached by bleaching agent with less environmental pollution, so as to produce high-quality dissolving pulp with high yield of pulp production and no emission of environmental pollutants such as dioxin. Background technique [0002] Paper and dissolving pulp are generally considered to be produced from wood. Here, the dissolving pulp refers to cellulose pulp, and refers to pulp that can be made into fibers from the cellulose pulp in the future. That is, in the past, wood pulp accounted for the vast majority, but recently due to insufficient wood resources, it has become a major issue to protect forests and maintain the environment to produce pulp as a raw material for papermaking. try. [0003] Such non-wood plants...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C3/02D21B1/02D21B1/12D21C5/00D21C9/02D21C9/10
CPCD21C1/02D21C1/04D21C3/02D21C3/222D21C5/00D21C9/10A62B1/20E06B5/01E06C7/505E06C9/02
Inventor 李权革元钟鸣
Owner 李权革
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