Method for manufacturing viscose through ultrasonic polymerization reduction of plant fibers

A plant fiber and viscose fiber technology, which is applied in the field of viscose fiber manufacturing, can solve the problems of large reactor area, unstable product quality, and uneven reduction of polymerization, so as to eliminate uneven reaction and reduce process control points , to avoid the effect of poly dead angle

Inactive Publication Date: 2011-05-04
YIBIN HIEST FIBER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 1. Uneven depolymerization: Due to the large volume of the reactor and many dead spots in the stirring, the stirring is uneven; and the addition of oxygen cannot evenly penetrate into the porridge to participate in the reaction, which eventually leads to uneven depolymerization;
[0008] 2. The reaction kettle occupies a large area, and requires compressed air and high temperature environment, which makes the whole viscose fiber produ

Method used

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  • Method for manufacturing viscose through ultrasonic polymerization reduction of plant fibers
  • Method for manufacturing viscose through ultrasonic polymerization reduction of plant fibers
  • Method for manufacturing viscose through ultrasonic polymerization reduction of plant fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Embodiment 1 (bamboo fiber one)

[0047] The specific process steps are as follows:

[0048] 1. Put bamboo fiber with an average degree of polymerization of about 1000 on the meal feeding machine, set a certain feeding speed (25kg / min), and then add lye with a concentration of 85g / l and a temperature of 60°C to 90°C. The flow rate is 10m 3 / h~20m 3, and then through stirring, the pulp is broken and mixed with lye fully to prepare a mixture of solid and liquid, which is called pulp porridge, and this process is called impregnation in technology.

[0049] Function: Make the bamboo fiber raw material into a solid and liquid mixture, dissolve β-cellulose at the same time, increase the content of α-fiber, and produce alkali cellulose.

[0050] Control parameters: lye temperature: 75±15°C lye concentration: 85g / l

[0051] Porridge concentration: 3.5±2% (mass percentage) Dipping time: 30±20min

[0052] 2. Pump the porridge in the auxiliary dipping barrel to the ...

Embodiment 2

[0062] Embodiment 2 (bamboo fiber two)

[0063] The specific process steps are as follows:

[0064] 1. Put bamboo fiber with an average degree of polymerization of about 800 on the meal feeding machine, set a certain feeding speed (25kg / min), and then add lye with a concentration of 80g / l and a temperature of 60°C to 90°C. The flow rate is 10m 3 / h~20m 3 , when adding lye, add auxiliary agent: methyl isopropyl ketone (MIBK)-alcohol mixed solvent, wherein MIBK: ethanol=50: 50 (volume ratio, the same below), its purpose is to accelerate lignin and impurity in bamboo fiber dissolution. Then, through stirring, the pulp is crushed and fully mixed with lye to prepare a mixture of solid and liquid, which is called pulp porridge, and this process is called impregnation in technology.

[0065] Function: Make the bamboo fiber raw material into a solid and liquid mixture, dissolve β-cellulose at the same time, increase the content of α-fiber, and produce alkali cellulose.

[0066] C...

Embodiment 3

[0078] Embodiment 3 (bamboo fiber three)

[0079] The specific process steps are as follows:

[0080] 1. Put bamboo fiber with an average degree of polymerization of about 1200 on the meal feeder, set a certain feeding speed (25kg / min), and then add lye with a concentration of 100g / l and a temperature of 60°C to 90°C. The flow rate is 10m 3 / h~20m 3 , when adding lye, add auxiliary agent: methyl isopropyl ketone (MIBK)-alcohol mixed solvent, wherein MIBK: ethanol=80: 50, its purpose is to accelerate the stripping of lignin and impurity in the bamboo fiber. Then, through stirring, the pulp is crushed and fully mixed with lye to prepare a mixture of solid and liquid, which is called pulp porridge, and this process is called impregnation in technology.

[0081] Function: Make the bamboo fiber raw material into a solid and liquid mixture, dissolve β-cellulose at the same time, increase the content of α-fiber, and produce alkali cellulose.

[0082] Control parameters: lye tempe...

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Abstract

The invention provides a method for manufacturing viscose through ultrasonic polymerization reduction of plant fibers, which is a viscose manufacturing method through direct polymerization reduction of the plant fibers by an ultrasonic polymerization reduction pipe. In the method, the ultrasonic polymerization reduction pipe replaces the traditional reaction kettle, and the plant fibers are subjected to alkali steeping to form pulp gruel; the pulp gruel is subjected to polymerization reduction under the action of an ultrasonoscope; the pulp gruel subjected to polymerization reduction is squeezed to form alkali fibers; and the alkali fibers are prepared into the viscose finally. The method overcomes the defects of the prior art, the polymerization reduction is more uniform, the energy consumption is low, a few pieces of equipment are used, the occupied space is small and the product quality is stable; and the polymerization reduction of ultrasonic waves on polymers is applied to the manufacturing of the viscose for the first time, so a polymerization reduction method for the manufacturing of the viscose through polymerization reduction is increased.

Description

technical field [0001] The invention belongs to the field of viscose fiber production, and relates to a method for producing viscose fiber from plant fibers and the application of ultrasonic depolymerization in the production of viscose fiber. technical background [0002] The depolymerization of cellulose (reducing the degree of polymerization) is an indispensable process step in the production of viscose. Only by reducing the depolymerization of plant cellulose to a certain extent can the production requirements of subsequent viscose fibers be met, and the uniformity of depolymerization in it And the degree of depolymerization is the key to depolymerization of cellulose. [0003] The reduction methods of cellulose for preparing viscose include: aerobic reduction and alkali reduction. In actual application, aerobic polymerization is the main method, while alkaline polymerization requires relatively high temperature and damages the original characteristics of cellulose, so ...

Claims

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Application Information

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IPC IPC(8): D01F2/06C08B1/08C08B1/10C08B9/00
Inventor 冯涛邓传东李蓉玲梁建军唐孝兵田启兵严青平胡小东施洋范怀熙
Owner YIBIN HIEST FIBER
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