Method for manufacturing viscose through ultrasonic polymerization reduction of bamboo and cotton composite pulp

Abstract

The invention provides a method for manufacturing viscose through ultrasonic polymerization reduction of bamboo and cotton composite pulp, which is a viscose manufacturing method through direct polymerization reduction of bamboo and cotton mixed pulp gruel by an ultrasonic polymerization reduction pipe. In the method, the ultrasonic polymerization reduction pipe replaces the traditional reaction kettle, and bamboo and cotton pulp is 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 polymerizationreduction 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 with bamboo-cotton composite pulp, in particular to a method for producing viscose fiber with bamboo-cotton 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 t...

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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