Method for manufacturing viscose fibers by ultrasonic polymerization reduction of wood-cotton composite pulp

Abstract

The invention provides a method for manufacturing viscose fibers by ultrasonic polymerization reduction of wood-cotton composite pulp, which is a method for producing the viscose fibers directly from the wood-cotton mixed pulp by ultrasonic polymerization reduction of an ultrasonic polymerization reduction pipe. The method comprises the following steps of: replacing the traditional reaction kettle by using the ultrasonic polymerization reduction pipe, and soaking the wood-cotton pulp into alkali to obtain paste; performing polymerization reduction on the paste under the action of an ultrasonic instrument; and squeezing the paste after the polymerization reduction to obtain alkali fibers, and finally preparing the alkali fibers into the viscose fibers. The method overcomes the defects of the prior art, and has more uniform polymerization reduction, low energy consumption, a little equipment, small floor space and stable product quality; and the polymerization reduction effect of ultrasonic on a polymer is applied in the manufacturing of the viscose fibers for the first time, so the polymerization reduction method in the polymerization reduction manufacturing of the viscose fibers is enriched.

Description

technical field [0001] The invention belongs to the field of viscose fiber production, and relates to a method for producing viscose fiber with kapok composite pulp, specifically a method for producing viscose fiber with kapok composite pulp by applying an ultrasonic depolymerization method. 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 damag...

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 production process become huge, time-consuming, with many equipments and large workshop area, which is not convenient for production management;

[0009] 3. The work of the reactor requires compressed air and steam, which consumes a lot of energy

[0010] 4. The reaction in the reaction kettle is under high temperature, aerobic and stirring conditions. There are many process control points and difficult control, resulting in unstable product quality.

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