Technique for preparing cotton pulp with high-degree of polymerization for cellulose ether

Abstract

The invention relates to a process for producing cellulose ether used high polymerised cotton pulp, in particular to a cotton pulp production process mainly used for manufacturing high-viscosity cellulose ethers products, such as carboxymethyl cellulose, hydroxypropyl methylcellulose, etc. by utilizing cotton linters as the raw materials. The process adopts low temperature cooking to prevent carcinogenic toxic substances such as dioxins, organic halides, etc. from being produced through adding chlorine dioxide, thereby having low toxicity, reducing the pollution to the environment, and producing the cotton pulp with high polymerization degree, uniform fiber length, less dust and high alphacellulose content. Besides, the COD discharge amount of the waste water in the practical production is low, and belongs to the low pollutant emission.

Description

Technical field

[0001] The invention relates to a cotton pulp production process, in particular to a production process for using cotton linters as raw materials to produce a high degree of polymerization cotton pulp for cellulose ethers, and is mainly used for the production of high-viscosity carboxymethyl cellulose , Hydroxypropyl methyl cellulose and other cellulose ether products cotton pulp production process. Background technique

[0002] High degree of polymerization cotton pulp is made of high-grade cotton linters. It is mainly used to make cellulose ether products such as ultra-high viscosity carboxymethyl cellulose and hydroxypropyl methyl cellulose. It is an urgently needed commodity in the international market. With the development of the petroleum industry, especially offshore oil exploration, and the needs of the construction industry, especially in the production of food, medicine and other industries, the quality index requirements of cotton pulp are not only high...