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Method for preparing coconut shell fibers by removing pectin from coconut shell through steam explosion

A technology of coconut shell fiber and coconut shell, which is applied in the chemical post-treatment of fibers, fiber treatment, textiles and papermaking, etc., which can solve the problems of pollution, immature coconut shell fiber degumming technology, etc., to avoid environmental pollution and reduce production costs , Improve the effect of yield and quality

Inactive Publication Date: 2011-11-09
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] [Purpose of the present invention] The purpose of the present invention is to provide a method for cleaning and preparing coconut shell fiber by steam explosion degumming of coconut shell for the problems of immature coconut shell fiber degumming technology and serious pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Steam explosion: the collected coconut shells are cut into lengths of 5-10cm, and the thickness is 1-3cm block, and the steam explosion is carried out under the pressure of 1.4MPa for 2min;

[0018] (2) Steam-exploded coconut shell rinsing: the steam-exploded raw material is rinsed with 30 times of water to remove degraded pectin, hemicellulose, and lignin components;

[0019] (3) Bleaching of steam-exploded coconut shells: two-stage bleaching technology is adopted, and the composition of the first-stage bleaching solution is: Na 2 SiO 3 , 5g / L; H 2 o 2 , 6g / L; NaOH, 4g / L, the composition of the second bleaching solution is: NaOH 2 SiO 3 , 5g / L; H 2 o 2 , 3g / L; NaOH, 3g / L, all bleached at 40°C for 50 minutes each, solid-to-liquid ratio: 1 / 20; after bleaching, the coconut shell fiber is obtained by rinsing. The yield of coconut shell fiber was 46% of the dry weight of the raw material.

Embodiment 2

[0021] (1) Steam explosion: the collected coconut shells are cut into lengths of 5-10cm, and the thickness is 1-3cm block, and the steam explosion is carried out under the pressure of 1.3MPa for 3min;

[0022] (2) Steam-exploded coconut shell rinsing: the steam-exploded raw material is rinsed with 20 times of water to remove degraded pectin, hemicellulose, and lignin components;

[0023] (3) Bleaching of steam-exploded coconut shells: two-stage bleaching technology is adopted, and the composition of the first-stage bleaching solution is: Na 2 SiO 3 , 8g / L; H 2 o 2 , 10g / L; NaOH, 6g / L, the composition of the second bleaching solution is: NaOH 2 SiO 3 , 5g / L; H 2 o 2 , 3g / L; NaOH, 3g / L, all bleached at 40°C for 50 minutes each, solid-to-liquid ratio: 1 / 20; after bleaching, the coconut shell fiber is obtained by rinsing. The yield of coconut shell fiber was 45% of the dry weight of the raw material.

Embodiment 3

[0025] (1) Steam explosion: the collected coconut shells are cut into lengths of 5-10cm, and the thickness is 1-3cm block, and the steam explosion is carried out under the pressure of 1.0MPa for 3min;

[0026] (2) Steam-exploded coconut shell rinsing: the steam-exploded raw material is rinsed with 20 times of water to remove degraded pectin, hemicellulose, and lignin components;

[0027] (3) Bleaching of steam-exploded coconut shells: two-stage bleaching technology is adopted, and the composition of the first-stage bleaching solution is: Na 2 SiO 3 , 10g / L; H 2 o 2 , 7g / L; NaOH, 6g / L, the composition of the second bleaching solution is: NaOH2 SiO 3 , 5g / L; H 2 o 2 , 3g / L; NaOH, 3g / L, all bleached at 60°C for 40 minutes each, solid-to-liquid ratio: 1 / 20; after bleaching, the coconut shell fiber is obtained by rinsing. The yield of coconut shell fiber was 42% of the dry weight of the raw material.

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Abstract

The invention belongs to the field of resource utilization of natural plant fibers, and in particular relates to a method for preparing coconut shell fibers by removing pectin from a coconut shell through steam explosion. The method comprises the following steps of: cutting the coconut shell into blocks for steam explosion processing; and rinsing and bleaching the blocks to obtain high-quality coconut shell fibers. Steam is used as a medium and any chemical reagent is not added in the steam explosion process, so that the method is clean and causes no pollution; over 80 percent of the pectin and hemicellulose in the coconut shell fibers are degraded by the steam explosion processing; lignin is partially degraded; meanwhile, the coconut shell fiber bundle is completely separated from other components; other tissues apart from the fibers can be removed by rinsing; and the coconut shell fibers are torn into loose structures in the steam explosion process, so the bleaching, oil supply and loosening of the fibers are facilitated and the quality of the fibers is improved. The invention provides a clean low-cost method for preparing the coconut shell fibers.

Description

technical field [0001] The invention belongs to the field of utilization of natural plant fibers, in particular to a method for preparing coconut shell fibers by steam explosion degumming and cleaning. technical background [0002] Southeast Asian countries and my country's Hainan Province are rich in coconuts. For a long time, people have discarded the coconut shell after eating the coconut meat. They seldom consider the wonderful use of the fiber in the inner layer of the shell, resulting in a great waste of resources. In recent years, due to the shortage of fossil resources and severe environmental problems, people have paid more and more attention to the use of coconut shells. Through scientific research and practice, it has been found that the fibers of coconut shells are very similar to hemp, and they feel softer and more evenly dried. , Hygroscopicity and bulkiness are better than hemp, it is an ideal textile raw material. The traditional production process is as fol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01C1/00
Inventor 陈洪章彭小伟
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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