CN105483838A - Hemp fiber degumming processing method - Google Patents

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

A kind of flax fibre pectin degum processing method

Technical field:

The present invention relates to and relate to flax fibre production technical field, particularly relate to a kind of flax fibre pectin degum processing method.

Background technology:

Crudefiber crop can produce the raw material of chemical industry, medicine and papermaking, all flax fibres are cellulose fibre, basic chemical composition is cellulose, and other also have the non-fibrous materials such as pectic substance, hemicellulose, lignin, fatty wax, and these are referred to as " colloid ", flax fibre bonds in flakes by colloid, they, all together with cellulose association, take out available fiber, must remove colloid when producing, make fiber separation, so be referred to as to be called and come unstuck.And the colloid contained in different fiber crops is different, therefore the processing method needed is not identical yet, the chemical method that current removal pectin uses, although can pectin be removed, but it is very large to cellulosic infringement, and processing technology is chronic, thus greatly have impact on working (machining) efficiency, also have impact on the cellulosic quality processed.

Summary of the invention:

The object of this invention is to provide a kind of flax fibre pectin degum processing method, the fiber of its processing is complete, and pectin is removed completely, and little to fiber damage, the process time shortens greatly, significantly improves production efficiency.

In order to solve the problem existing for background technology, by the following technical solutions, it comprises the following steps the inventive method:

Step one: acidleach: raw ramie is put into water, then adds dilute sulfuric acid, and the concentration adding rear sulfuric acid is 0.5-1.0ml/L, is then heated to 35-45 DEG C and soaks, and the time is 40-50min;

Step 2: washing: with clear water rinsing twice, each 10min after the raw ramie after acidleach is taken out;

Step 3: come unstuck in advance:

1, in steamer, water is put into, and heat water to 80-90 DEG C, then the raw ramie before putting into after washing, then continue to heat water, come unstuck before adding when reaching 150 DEG C liquid medicine, and containing sodium thiosulfate, sulfuric acid, potassium chloride in the front liquid medicine that comes unstuck, the ratio between them is respectively 6:1:0.6, then continue to heat water to remain on 150 DEG C in 60 minutes, most relief its naturally cool to 95 DEG C;

2 and then by water secondary temperature elevation to 135 DEG C, boiling is cooled to 90 DEG C after 10 minutes again;

3 and then water is warming up to 110 DEG C three times, boiling was cooled to 90 DEG C after 25 minutes;

4, most relief water naturally cools to room temperature, then the raw ramie after coming unstuck in advance is put into clear water rinsing twice, each 10min;

Step 4: after come unstuck:

1, in another steamer, water is put into, and heat water to 70-80 DEG C, then the raw ramie after coming unstuck in advance is put into, then continue to heat water, come unstuck after adding when reaching 120 DEG C liquid medicine, after come unstuck containing magnesium sulfate, NaOH in liquid medicine, the ratio between them is respectively 10:1, then continue to heat water to remain on 120 DEG C in 50 minutes, most relief its naturally cool to 90 DEG C;

2 and then by water secondary temperature elevation to 115 DEG C, boiling is cooled to 90 DEG C after 10 minutes again;

3 and then water is warming up to 110 DEG C three times, boiling was cooled to 90 DEG C after 20 minutes;

4, most relief water naturally cools to room temperature, then by after come unstuck after raw ramie put into clear water rinsing three times, each 15min.

The inventive method to be come unstuck processing to fiber crops, and integral processing foreshortens to a few hours greatly, substantially increases production efficiency, and pectin degumming rate is high, substantially without remaining, the liquid medicine that comes unstuck is selected and is coordinated perfection with conditions of cooking, makes to drop to minimum to the infringement of fiber while efficiently coming unstuck.

Detailed description of the invention:

The inventive method concrete steps comprise:

Embodiment 1: the present embodiment carries out as follows:

Step one: acidleach: raw ramie is put into water, then adds dilute sulfuric acid, and the concentration adding rear sulfuric acid is 0.5ml/L, is then heated to 35 DEG C and soaks, and the time is 50min;

Step 2: washing: with clear water rinsing twice, each 10min after the raw ramie after acidleach is taken out;

Step 3: come unstuck in advance:

1, in steamer, water is put into, and heat water to 90 DEG C, then the raw ramie before putting into after washing, then continue to heat water, come unstuck before adding when reaching 150 DEG C liquid medicine, and containing sodium thiosulfate, sulfuric acid, potassium chloride in the front liquid medicine that comes unstuck, the ratio between them is respectively 6:1:0.6, then continue to heat water to remain on 150 DEG C in 60 minutes, most relief its naturally cool to 95 DEG C;

2 and then by water secondary temperature elevation to 135 DEG C, boiling is cooled to 90 DEG C after 10 minutes again;

3 and then water is warming up to 110 DEG C three times, boiling was cooled to 90 DEG C after 25 minutes;

4, most relief water naturally cools to room temperature, then the raw ramie after coming unstuck in advance is put into clear water rinsing twice, each 10min;

Step 4: after come unstuck:

1, in another steamer, water is put into, and heat water to 70 DEG C, then the raw ramie after coming unstuck in advance is put into, then continue to heat water, come unstuck after adding when reaching 120 DEG C liquid medicine, after come unstuck containing magnesium sulfate, NaOH in liquid medicine, the ratio between them is respectively 10:1, then continue to heat water to remain on 120 DEG C in 50 minutes, most relief its naturally cool to 90 DEG C;

2 and then by water secondary temperature elevation to 115 DEG C, boiling is cooled to 90 DEG C after 10 minutes again;

3 and then water is warming up to 110 DEG C three times, boiling was cooled to 90 DEG C after 20 minutes;

4, most relief water naturally cools to room temperature, then by after come unstuck after raw ramie put into clear water rinsing three times, each 15min.

Embodiment 2: the present embodiment carries out as follows:

Step one: acidleach: raw ramie is put into water, then adds dilute sulfuric acid, and the concentration adding rear sulfuric acid is 1.0ml/L, is then heated to 45 DEG C and soaks, and the time is 40min;

Step 2: washing: with clear water rinsing twice, each 10min after the raw ramie after acidleach is taken out;

Step 3: come unstuck in advance:

1, in steamer, water is put into, and heat water to 80 DEG C, then the raw ramie before putting into after washing, then continue to heat water, come unstuck before adding when reaching 150 DEG C liquid medicine, and containing sodium thiosulfate, sulfuric acid, potassium chloride in the front liquid medicine that comes unstuck, the ratio between them is respectively 6:1:0.6, then continue to heat water to remain on 150 DEG C in 60 minutes, most relief its naturally cool to 95 DEG C;

2 and then by water secondary temperature elevation to 135 DEG C, boiling is cooled to 90 DEG C after 10 minutes again;

3 and then water is warming up to 110 DEG C three times, boiling was cooled to 90 DEG C after 25 minutes;

4, most relief water naturally cools to room temperature, then the raw ramie after coming unstuck in advance is put into clear water rinsing twice, each 10min;

Step 4: after come unstuck:

1, in another steamer, water is put into, and heat water to 80 DEG C, then the raw ramie after coming unstuck in advance is put into, then continue to heat water, come unstuck after adding when reaching 120 DEG C liquid medicine, after come unstuck containing magnesium sulfate, NaOH in liquid medicine, the ratio between them is respectively 10:1, then continue to heat water to remain on 120 DEG C in 50 minutes, most relief its naturally cool to 90 DEG C;

2 and then by water secondary temperature elevation to 115 DEG C, boiling is cooled to 90 DEG C after 10 minutes again;

3 and then water is warming up to 110 DEG C three times, boiling was cooled to 90 DEG C after 20 minutes;

4, most relief water naturally cools to room temperature, then by after come unstuck after raw ramie put into clear water rinsing three times, each 15min.

Claims (1)

1. a flax fibre pectin degum processing method, it comprises the following steps:

Step one: acidleach: raw ramie is put into water, then adds dilute sulfuric acid, and the concentration adding rear sulfuric acid is 0.5-1.0ml/L, is then heated to 35-45 DEG C and soaks, and the time is 40-50min;

Step 2: washing: with clear water rinsing twice, each 10min after the raw ramie after acidleach is taken out;

Step 3: come unstuck in advance:

1, in steamer, water is put into, and heat water to 80-90 DEG C, then the raw ramie before putting into after washing, then continue to heat water, come unstuck before adding when reaching 150 DEG C liquid medicine, and containing sodium thiosulfate, sulfuric acid, potassium chloride in the front liquid medicine that comes unstuck, the ratio between them is respectively 6:1:0.6, then continue to heat water to remain on 150 DEG C in 60 minutes, most relief its naturally cool to 95 DEG C;

2 and then by water secondary temperature elevation to 135 DEG C, boiling is cooled to 90 DEG C after 10 minutes again;

3 and then water is warming up to 110 DEG C three times, boiling was cooled to 90 DEG C after 25 minutes;

4, most relief water naturally cools to room temperature, then the raw ramie after coming unstuck in advance is put into clear water rinsing twice, each 10min;

Step 4: after come unstuck:

1, in another steamer, water is put into, and heat water to 70-80 DEG C, then the raw ramie after coming unstuck in advance is put into, then continue to heat water, come unstuck after adding when reaching 120 DEG C liquid medicine, after come unstuck containing magnesium sulfate, NaOH in liquid medicine, the ratio between them is respectively 10:1, then continue to heat water to remain on 120 DEG C in 50 minutes, most relief its naturally cool to 90 DEG C;

2 and then by water secondary temperature elevation to 115 DEG C, boiling is cooled to 90 DEG C after 10 minutes again;

3 and then water is warming up to 110 DEG C three times, boiling was cooled to 90 DEG C after 20 minutes;

4, most relief water naturally cools to room temperature, then by after come unstuck after raw ramie put into clear water rinsing three times, each 15min.