Production process of cotton pulp for cellulose triacetate

Abstract

The invention relates to a production process of cotton pulp for cellulose triacetate, in particular to a simple production process of cotton pulp using cotton linter as a raw material; in the whole pulping process, the wastewater COD discharge is as low as 20250-25050mg / l, so that the environmental pollution and sewage treatment pressure can be reduced; on the conditions of stable polymerization, high whiteness and alpha cellulose content, uniform fiber length and proper compactness, the product has low content of methylene dichloride extract and metallic ions, low ash content and low dust, thus being applicable to the industry for producing cellulose triacetate.

Description

technical field

[0001] The invention relates to a production process of cotton pulp, in particular to a production process of cotton pulp for manufacturing cellulose triacetate. Background technique

[0002] my country is rich in cotton resources. Most domestic enterprises use cotton linters, a by-product of cotton processing, as raw materials. For example, in the textile field, cotton linters are used as raw materials to make cotton pulp, which is used in the viscose fiber industry. The added value is low, and in production, the COD discharge of wastewater is about 45000mg / l, which has the problem of polluting the environment.

[0003] Due to its toughness, high tensile strength, high compressive strength, and good heat resistance, triacetate cellulose is an indispensable part of the production of polarizers for liquid crystal displays. With the rapid development of liquid crystal displays, triacetate fibers Su put forward higher requirements. The most important raw materi...