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A method for preparing textile fibers from raw hemp by degumming with an organic solvent

An organic solvent and raw hemp technology, applied in the field of raw hemp degumming, can solve problems such as cellulose damage, achieve the effects of reducing surface tension, simple and efficient damage, and low residual glue rate

Active Publication Date: 2020-04-17
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above methods do not pollute the environment and are beneficial to environmental protection, but because the degumming reaction is carried out under high temperature and water conditions, too high pressure will cause great damage to cellulose

Method used

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  • A method for preparing textile fibers from raw hemp by degumming with an organic solvent
  • A method for preparing textile fibers from raw hemp by degumming with an organic solvent
  • A method for preparing textile fibers from raw hemp by degumming with an organic solvent

Examples

Experimental program
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Effect test

Embodiment 1

[0037] A method for preparing textile fibers with raw hemp through degumming with an organic solvent, the steps are as follows:

[0038] (1) prepare degumming solution;

[0039] The degumming solution is an anhydrous system composed of ethylene glycol and anthraquinone, and the content of anthraquinone in the degumming solution is 0.1wt%;

[0040] (2) Set up a circulating closed system;

[0041] Such as figure 1 As shown, the circulating closed system is mainly composed of a main kettle and an auxiliary kettle. The heating device 3 is respectively installed on the main kettle and the auxiliary kettle. A closed loop is formed between the main kettle and the auxiliary kettle through a pipeline a and a pipeline b. Both are equipped with valve 2 and condenser 1;

[0042] (3) First, mix the prepared degumming solution and ramie raw hemp in the main kettle of the closed system at a weight ratio of 1:30, then heat the main kettle and the auxiliary kettle to 200°C, and heat the mix...

Embodiment 2

[0049] A method for preparing textile fibers with raw hemp through degumming with an organic solvent, the steps are as follows:

[0050] (1) prepare degumming solution;

[0051] The degumming solution is an anhydrous system composed of glycerol and anthraquinone, and the content of anthraquinone in the degumming solution is 0.01wt%;

[0052] (2) Set up a circulating closed system;

[0053] The structure of the closed loop system is identical to that of Example 1;

[0054] (3) First, mix the prepared degumming liquid and hemp raw hemp in the main kettle of the closed system at a weight ratio of 1:20, then heat the main kettle and the auxiliary kettle to 180°C, and heat the mixture under a pressure of 0.6MPa. Next, use the degumming liquid in the circulating closed system to treat the raw cannabis for 0.5 hours. During the treatment process, the circulating closed system realizes the circulation of the degumming liquid through continuous distillation, condensation and reflux, ...

Embodiment 3

[0057] A method for preparing textile fibers with raw hemp through degumming with an organic solvent, the steps are as follows:

[0058] (1) prepare degumming solution;

[0059] The degumming solution is an anhydrous system consisting of 1,2-propanediol, sodium citrate, urea and anthraquinone. In the degumming solution, the contents of anthraquinone, sodium citrate and urea are 0.05wt%, 0.2wt% and 0.2wt% respectively %;

[0060] (2) Set up a circulating closed system;

[0061] The structure of the closed loop system is identical to that of Example 1;

[0062] (3) First, mix the prepared degumming solution and kenaf raw hemp in the main kettle of the closed system at a weight ratio of 1:15, then heat the main kettle and the auxiliary kettle to 198°C, and heat the mixture under a pressure of 0.2MPa. Next, use the degumming solution in the circulating closed system to treat the raw kenaf for 1 hour. During the treatment process, the circulating closed system realizes the circu...

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Abstract

The invention relates to a method for preparing a textile fiber by degumming raw hemp through an organic solvent. According to the method, the textile fiber is obtained by processing the raw hemp through degumming liquid, the degumming liquid is an anhydrous system and mainly contains an organic solvent and a quinone catalyst, the organic solvent is low-grade fatty alcohol, low-grade fatty acid, low-grade fatty ketone, low-grade ester or an R radical-containing low-grade aliphatic series, R radical is at least one of amido, a nitrile group or acylamino, and low grade represents that the carbonnumber is less than 8. According to the method, the hemp fiber is degummed in one step by virtue of the total organic solvent anhydrous system, the required pressure is low, the process flow is simple, the cost is low, the prepared fiber has the advantages of low residual gum content, low injury, good fibrousness, high strength, flexibility, good spinnability and the like and has great promotional values.

Description

technical field [0001] The invention belongs to the technical field of degumming raw hemp, and relates to a method for preparing textile fibers by degumming raw hemp with an organic solvent. Background technique [0002] Hemp is a plant fiber, one of the earliest fibers used by humans. Hemp fiber has the functions of moisture absorption, heat resistance, washing resistance, breathability, antibacterial, antiseptic and mildew resistance, and its fiber products are widely used in various fields of human production and life. [0003] From the composition analysis of hemp fiber, in addition to the cellulose component, the non-cellulose component, that is, the gum component, mainly includes hemicellulose, lignin and pectin. The main purpose of degumming raw hemp is to partially or completely remove the colloidal components in the raw hemp and retain the cellulose components, so as to obtain textile fibers with good properties. [0004] Nowadays, the commonly used methods for de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01C1/02
Inventor 张瑞云屈永帅赵树元刘柳俞建勇程隆棣李毓陵吴德群
Owner DONGHUA UNIV
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