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Preparation method of bamboo dissolving pulp

A technology for dissolving pulp and bamboo, applied in pulp bleaching, pulping with inorganic alkali, pulping with cellulose raw materials, etc., can solve the problems of high consumption of chemical preparations, complex process flow, and large amount of waste water.

Inactive Publication Date: 2011-07-13
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the known preparation method of producing masson pine dissolving pulp, usually carry out kraft cooking after pre-hydrolysis, its main disadvantages are: complex process flow, high energy consumption and chemical preparation consumption, much waste water, serious environmental pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A preparation method of bamboo dissolving pulp, comprising the following steps:

[0042] 1) Prepare materials, choose 2-year-old bamboo and cut it into a sheet with a specification of 25×25×5, and the moisture content of the bamboo is 40%.

[0043] 2) Loading the pot: Calculate the amount of material and liquid medicine according to the volume of the digester; add qualified bamboo chips and liquid medicine to the cooking pot at the same time. The liquid temperature should be appropriate.

[0044] Bamboo with a water content of 40% and the medicinal liquid are cooked in a cooking pot. The medicinal liquid is the existing general-purpose sulfate and alkali. 24%, heating rate 8°C / 10min, 135°C heat preservation 90min, maximum cooking temperature 170°C, heat preservation time 80min. The total heating time: 205min, the number of small steam releases: 1 time, divided into three stages: the first stage, from the initial temperature to 135°C, the heating time is 145min, and on...

Embodiment 2

[0062] A preparation method of bamboo dissolving pulp, comprising the following steps:

[0063] 1) Prepare materials, choose 3-year-old bamboo and cut it into a sheet with a specification of 25×25×5, and the moisture content of the bamboo is 40%.

[0064] 2) Loading the pot: Calculate the amount of material and liquid medicine according to the volume of the digester; add qualified bamboo chips and liquid medicine to the cooking pot at the same time. The liquid temperature should be appropriate.

[0065] Bamboo with a water content of 40% and the medicinal liquid are cooked in a cooking pot. The medicinal liquid is the existing general-purpose sulfate and alkali. 23%, the heating rate is 9°C / 10min, the heat preservation time is 80 minutes at 130°C, the maximum cooking temperature is 180°C, and the heat preservation time is 80 minutes. The total heating time: 210min, the number of small steam releases: 1 time, divided into three stages: the first stage, from the initial temper...

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PUM

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Abstract

The invention discloses a preparation method of bamboo dissolving pulp. The method comprises the following steps of: (1) preparing materials; (2) stewing with sulfate; (3) bleaching with OO-X-D1-E-D2; and (4) treating with acid. The purity and the content of type A cellulose in the bamboo dissolving pulp prepared with the preparation method of the bamboo dissolving pulp are increased in a certain degree compared with those in the prior art, the purity and the content of alpha cellulose are increased by 1.5-2.5 percent compared with those in the prior art, the yield can be further increased, the dosage of chemical preparations and energy consumption are reduced, and environmental pollution can be further reduced.

Description

technical field [0001] The invention relates to a preparation method of bamboo dissolving pulp, in particular to a preparation method of bamboo dissolving pulp used in the textile and chemical fiber industry. Background technique [0002] Bamboo forest is an important part of forest resources. Bamboo forests in the world are mainly distributed in the southeast monsoon region of Asia. my country's bamboo accounts for nearly one-third of the world's resources, and is the world's largest bamboo resource country, with an existing bamboo forest area of ​​4,842,600 hm 2 . Bamboo grows fast and is easy to regenerate. The fiber shape and fiber content of bamboo are very similar to broad-leaved wood suitable for papermaking. It is a high-quality raw material for the pulp and paper industry. Bamboo pulp produced by the kraft process is commonly used in papermaking. After entering the 21st century, a series of problems threatening human survival and development, such as resource sho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C3/02D21C3/22D21C9/10D21C9/00
Inventor 陈礼辉黄六莲马晓娟陈艳希
Owner FUJIAN AGRI & FORESTRY UNIV
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