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Hemp fiber degumming processing method

A processing method and hemp fiber technology, applied in the field of hemp fiber pectin degumming processing, can solve the problems of long processing time, affecting cellulose quality, affecting processing efficiency, etc., and achieve shortening processing technology, improving production efficiency, and high-efficiency degumming fiber. the effect of damage

Inactive Publication Date: 2016-04-13
宿州学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Different hemp contains different colloids, so the processing methods required are also different. Although the current chemical methods used to remove pectin can remove pectin, they do great damage to cellulose, and the processing time is very long , which greatly affects the processing efficiency and the quality of the processed cellulose

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: the present embodiment carries out as follows:

[0020] Step 1: acid leaching: put the raw hemp into water, then add dilute sulfuric acid, the concentration of sulfuric acid after adding is 0.5ml / L, then heat to 35°C for 50min;

[0021] Step 2: Washing: Take out the raw hemp after acid leaching and rinse it twice with water, 10 minutes each time;

[0022] Step 3: Pre-degumming:

[0023] 1. Put water in the steamer and heat the water to 90°C, then put in the pre-washed raw hemp, then continue to heat the water, add the pre-degumming potion when it reaches 150°C, the pre-degumming potion contains Sodium thiosulfate, sulfuric acid, potassium chloride, the ratio between them is 6:1:0.6 respectively, then continue to heat the water for 60 minutes and keep it at 150°C, and finally let it cool down to 95°C naturally;

[0024] 2. Then heat the water up to 135°C for the second time, and then cool down to 90°C after cooking for 10 minutes;

[0025] 3. Then heat t...

Embodiment 2

[0032] Embodiment 2: the present embodiment carries out as follows:

[0033] Step 1: Acid leaching: Put the raw hemp into water, then add dilute sulfuric acid, the concentration of sulfuric acid after adding is 1.0ml / L, then heat to 45°C for 40 minutes;

[0034] Step 2: Washing: Take out the raw hemp after acid leaching and rinse it twice with water, 10 minutes each time;

[0035] Step 3: Pre-degumming:

[0036] 1. Put water in the steamer and heat the water to 80°C, then put in the pre-washed raw hemp, then continue to heat the water, add the pre-degumming potion when it reaches 150°C, the pre-degumming potion contains Sodium thiosulfate, sulfuric acid, potassium chloride, the ratio between them is 6:1:0.6 respectively, then continue to heat the water for 60 minutes and keep it at 150°C, and finally let it cool down to 95°C naturally;

[0037] 2. Then heat the water up to 135°C for the second time, and then cool down to 90°C after cooking for 10 minutes;

[0038] 3. Then h...

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PUM

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Abstract

The invention provides a hemp fiber degumming processing method. Raw hemp is put into water, dilute sulphuric acid is added, the mixture is heated to 35-45 DEG C, and the raw hemp is soaked for 40-50 min; the raw hemp subjected to acid dipping is taken out and bleached twice; water in a steamer is heated to 80-90 DEG C, the raw hemp is put into the steamer, a pre-degumming liquid preparation is added when the water is heated to 150 DEG C, and the water continues to be heated for 60 minutes and then cooled to 95 DEG C; the water is heated to 135 DEG C and the raw hemp is steamed and boiled for 10 minutes; the water is heated to 110 DEG C and the raw hemp is steamed and boiled for 25 minutes; pre-degummed raw hemp is bleached twice; water is heated to 70-80 DEG C in another steamer, the pre-degummed raw hemp is put into the steamer, a post-degumming liquid preparation is added when the temperature reaches 120 DEG C, and the water is heated for 50 minutes and then cooled to 90 DEG C; the water is heated to 115 DEG C and steamed and boiled for 10 minutes; the water is heated to 110 DEG C and steamed and boiled for 20 minutes; the raw hemp is cooled to the room temperature and bleached three times. With the adoption of the method, processed hemp fiber is complete, degumming is complete, the fiber is seldom damaged, the processing time is greatly shortened, and the production efficiency is remarkably improved.

Description

Technical field: [0001] The invention relates to the technical field of hemp fiber production, in particular to a processing method for degumming hemp fiber pectin. Background technique: [0002] Hemp crops can be used as raw materials for chemical industry, medicine and papermaking. All hemp fibers are cellulose fibers, the basic chemical composition is cellulose, and other non-fibers such as pectin, hemicellulose, lignin, and fat wax Substances, these are collectively referred to as "colloid", hemp fibers are bonded into sheets by colloid, and they are all associated with cellulose. To take out available fibers, the colloid must be removed to separate the fibers, so it is called is called degumming. Different hemp contains different colloids, so the processing methods required are also different. Although the current chemical methods used to remove pectin can remove pectin, they do great damage to cellulose, and the processing time is very long , thus greatly affecting t...

Claims

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Application Information

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IPC IPC(8): D01C1/02
CPCD01C1/02
Inventor 邓福康
Owner 宿州学院