Unlock instant, AI-driven research and patent intelligence for your innovation.

Activation method for wheat straw cellulose

An activation method, the technology of wheat straw, is applied in the fields of pulping of cellulose raw materials, processing of fiber raw materials, textiles and papermaking, etc. It can solve the problems of environmental damage and fire hazards, and achieve low operating costs, good activation effect, and raw material sources. wide effect

Active Publication Date: 2018-01-05
GUANGXI NORMAL UNIV OF SCI & TECH
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Wheat straw is a by-product of wheat harvesting in northern my country. The annual output is huge, but only a small part is used in the paper industry. Most of the wheat straw is burned or abandoned. When the wheat straw is burned, a large amount of gas that damages the environment will be emitted. At the same time There is also a fire hazard

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A method for activating wheat straw cellulose, comprising the following steps:

[0016] S1. Dry the wheat straw at 55°C to constant weight, then crush it into pieces, pass the pieces through a 60-mesh sieve and put them into a ball mill, and ball mill them at 45°C at a speed of 800r / min for 1.5h to obtain the pre- processing wheat straw;

[0017] S2. In parts by weight, take 50 parts of the pretreated wheat straw in S1 and add it into a three-necked bottle with 1000 parts of a mass fraction of 3% sodium hydroxide solution. One side of the three-necked bottle is provided with Snake-shaped condensation, the other side port is closed with a rubber plug, a stirrer is installed at the front of the three-necked bottle, and the three-necked bottle is stirred in a water bath at 95°C for 1.5 hours at a stirring speed of 400r / min. After the stirring is completed, the temperature of the water bath is adjusted to room temperature , then add 30 parts of sodium hydroxide to the thre...

Embodiment 2

[0020] A method for activating wheat straw cellulose, comprising the following steps:

[0021] S1. Dry the wheat straw at 40°C to constant weight, then crush it into pieces, put the pieces through a 60-mesh sieve and put them into a ball mill, and ball mill them at a speed of 600r / min at 70°C for 2 hours to obtain pretreatment wheat straw;

[0022] S2. In parts by weight, take 50 parts of the pretreated wheat straw in S1 and add it into a three-neck bottle containing 1000 parts by mass fraction of 5% sodium hydroxide solution. One side of the three-necked bottle is provided with Snake-shaped condensation, the other side port is closed with a rubber stopper, a stirrer is installed at the front of the three-necked bottle, and the three-necked bottle is stirred in a water bath at 90°C for 1 hour at a stirring speed of 3500r / min. After the stirring is completed, the temperature of the water bath is adjusted to room temperature. Then add 20 parts of sodium hydroxide in the there-n...

Embodiment 3

[0025] A method for activating wheat straw cellulose, comprising the following steps:

[0026] S1. Dry the wheat straw at 60°C to a constant weight, then crush it into pieces, pass the pieces through a 60-mesh sieve, put them into a ball mill, and ball mill them at a speed of 500r / min for 2.5 hours at 55°C to obtain the pre- processing wheat straw;

[0027] S2. In parts by weight, take 50 parts of the pretreated wheat straw in S1 and add it to a three-necked bottle with 1000 parts of a mass fraction of 4% sodium hydroxide solution. One side of the three-necked bottle is provided with Snake-shaped condensation, the other side port is closed with a rubber plug, a stirrer is installed at the front of the three-necked bottle, and the three-necked bottle is stirred in a water bath at 93°C for 2 hours at a stirring speed of 450r / min. After the stirring is completed, the temperature of the water bath is adjusted to room temperature. Then add 25 parts of sodium hydroxide in the there...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
poweraaaaaaaaaa
Login to View More

Abstract

The invention discloses an activation method for wheat straw cellulose. The method comprises: using a mechanical milling to preliminarily activate cellulose, and then using a sodium hydroxide solutionin mass fraction of 3-5% to cook, after cooling, regulating mass fraction of the sodium hydroxide to 6-7%, and adding an activating agent formed by 3-7 parts of potassium bromide, 10-18 parts of sodium chloride, and 20-25 parts of ammonium hydroxide whose mass fraction is 25%, reacting for 3-5 h under condition of 600-1000 W microwave, finally, filtering, and washing filter residue to neutral, toobtain an activated cellulose. The method is characterized by economical, high efficiency, and good activation effect.

Description

technical field [0001] The invention relates to a method for activating wheat straw cellulose. Background technique [0002] Wheat straw is a by-product of wheat harvesting in northern my country. The annual output is huge, but only a small part is used in the paper industry. Most of the wheat straw is burned or abandoned. When the wheat straw is burned, a large amount of gas that damages the environment will be emitted. At the same time There is also a fire hazard. The main components of wheat straw are cellulose, hemicellulose and lignin, among which cellulose contains about 40%, and the content of cellulose is very considerable. The cellulose used for textile and papermaking in the world reaches 8 million tons per year. In addition, using separated and purified cellulose as raw material, rayon, cellophane, nitrate, acetate and other ester derivatives can be produced; methyl cellulose, ethyl cellulose, carboxymethyl cellulose can also be produced , polyanionic cellulose ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): D21B1/06D21C3/02D21C3/22
Inventor 廖政达李大成陈燕萌王小淑
Owner GUANGXI NORMAL UNIV OF SCI & TECH