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Method for removing residual gum from ramie

A technology of glue residue and removal, which is applied in the direction of chemical production of bast fibers, etc., can solve the problems of high residue glue of ramie essence and dry hemp and cannot meet the requirements of spinning, and achieves good degumming effect, short processing time, and processing steps. less effect

Inactive Publication Date: 2012-11-21
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: provide a kind of use N-methylmorpholine-N-oxide aqueous solution to remove the residual glue of ramie dry hemp after biological degumming, to solve the problem that the ramie refined dry hemp cannot reach due to the high residual glue. to spinning requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Step (1): Add 50g of N-methylmorpholine-N-oxide into 50ml of distilled water, stir at room temperature until completely dissolved, and make 50% N-methylmorpholine-N-oxide aqueous solution.

[0019] Step (2): Soak the dried hemp after biological degumming in water at 100°C for 1 hour to remove the remaining water-soluble colloid, and then squeeze it dry to obtain pretreated hemp.

[0020] Step (3): Take 5 g of biologically degummed ramie lean dry hemp, and add it to 50 ml of 50% N-methylmorpholine-N-oxide aqueous solution at a bath ratio of 1:10.

[0021] Step (4): heating the step (3) to 70° C. for 60 minutes at this temperature to obtain fine-dried ramie that meets the requirements for spinning.

[0022] Step (5): Determination of the residual glue rate of ramie refined dry hemp after removing the glue

[0023] The detection of ramie residual glue rate is in accordance with GB 5889--1986 "Methods for Quantitative Analysis of Ramie Chemical Composition".

[0024] Aft...

Embodiment 2

[0026] Step (1): Add 80g of N-methylmorpholine-N-oxide into 120ml of distilled water, stir at room temperature until completely dissolved, and make 40% N-methylmorpholine-N-oxide aqueous solution.

[0027] Step (2): Soak the dried hemp after biological degumming in water at 100°C for 1 hour to remove the remaining water-soluble colloid, and then squeeze it dry to obtain pretreated hemp.

[0028] Step (3): Take 5 g of bio-degummed ramie lean dry hemp, and add it to 100 ml of 40% N-methylmorpholine-N-oxide aqueous solution at a bath ratio of 1:20.

[0029] Step (4): heating the step (3) to 70° C. for 60 minutes at this temperature to obtain fine-dried ramie that meets the requirements for spinning.

[0030] Step (5): Determination of the residual glue rate of ramie refined dry hemp after removing the glue

[0031] Same as Example 1, after detection, the ramie refined dry hemp after the gelatin removal obtained in this example has a residual glue rate of 2.86%.

Embodiment 3

[0033] Step (1): Add 60g of N-methylmorpholine-N-oxide into 40ml of distilled water, stir at room temperature until completely dissolved, and make 60% N-methylmorpholine-N-oxide aqueous solution.

[0034] Step (2): Soak the dried hemp after biological degumming in water at 100°C for 1 hour to remove the remaining water-soluble colloid, and then squeeze it dry to obtain pretreated hemp.

[0035] Step (3): Take 5 g of bio-degummed ramie lean dry hemp, and add it to 50 ml of 60% N-methylmorpholine-N-oxide aqueous solution at a bath ratio of 1:10.

[0036] Step (4): heating the step (3) to 70° C. for 60 minutes at this temperature to obtain fine-dried ramie that meets the requirements for spinning.

[0037] Step (5): Determination of the residual glue rate of ramie refined dry hemp after removing the glue

[0038] Same as Example 1, after testing, the ramie refined dry hemp after the gelatin removal obtained in this example has a residual glue rate of 2.92%.

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Abstract

The invention relates to a method for removing residual gum from ramie, in particular to method which adopts N-methyl morpholine-N-oxide aqueous solution as dissolvent to remove residual gum from degummed ramie after bio-degumming. The method includes the steps: preparation of N-methyl morpholine-N-oxide aqueous solution, pretreatment of degummed ramie, and removal of residual gum, wherein the residual gum of the degummed ramie after pretreatment is removed under the conditions that the reaction temperature is controlled to be 30-90 DEG C, the mass fraction of N-methyl morpholine-N-oxide is 10-80%, the soak time is 10-80 min and the bath ratio is1:5-1:50. The method solves the problems such as high energy consumption in production, serious pollution, low quality of degummed ramie, high residual gum rate, low yield and the like in the existing method for removing residual gum from ramie.

Description

technical field [0001] The invention belongs to a ramie degumming method, in particular to a method for removing ramie residual glue by using an N-methylmorpholine-N-oxide aqueous solution. Background technique [0002] Ramie is a characteristic textile raw material with resource monopoly in my country, and its output accounts for more than 90% of the world's ramie fiber output. It is called "Chinese grass". Ramie fabric has the advantages of rough, crisp, elegant, light, cool, breathable, antibacterial, etc., and is known as the "king of natural fibers". Ramie fiber has good wearability, and its superiority and unique style are unmatched by other fibers. The production of ramie fiber starts with degumming of ramie bast, which can be generally divided into chemical degumming and biological degumming. At present, the main method of degumming ramie in my country is chemical degumming, which has long process, many procedures, many manual operations, high labor intensity, long...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01C1/02
Inventor 蔡映杰曾庆福林丽娜陈悟崔永明李玉广陈洪高王军潘飞苏工兵
Owner WUHAN TEXTILE UNIV
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