Stabilizing treatment system for cellulose acetate and derivatives thereof

Abstract

The invention discloses a stabilizing treatment system for cellulose acetate and derivatives thereof, belonging to the field of production equipment of cellulose acetate and derivatives thereof. The invention discloses the system capable of realizing stabilizing treatment of cellulose acetate and the derivatives thereof so as to improve the removal effect of corresponding byproducts in a product and finally improve the product quality of the cellulose acetate and the derivatives thereof. According to the invention, targeted stabilizing treatment can be carried out on the cellulose acetate andthe derivatives thereof in the production process, so the removal effect on byproducts is improved, and the product quality is improved. Besides, materials can be boiled and also can be steamed through filtering with a bottom filtering net at first and then spraying steam, the heating effect of the products can be further improved through direct steam spraying and heating, heat waste of the steamis reduced, and energy consumption in the whole treatment process is greatly reduced.

Description

technical field [0001] The invention relates to the field of production equipment for cellulose acetate and its derivatives, in particular to a stabilization treatment system for cellulose acetate and its derivatives. Background technique [0002] Cellulose acetate and its derivatives are made of natural wood pulp or cotton pulp, with acetic acid as solvent and acetic anhydride as acetylating agent. Washing, pressing, drying and other processes to obtain cellulose acetate and its derivatives are one of the earliest cellulose organic esters for industrial application. According to the degree of substitution, it can be divided into cellulose acetate and its derivatives, cellulose diacetate and its derivatives, and cellulose triacetate and its derivatives. Derivatives of cellulose acetate and its derivatives include cellulose acetate organic acid esters formed from acetic acid and other organic acids and cellulose, such as cellulose acetate propionate, cellulose acetate benzoa...

AI Technical Summary

Problems solved by technology

However, in general, there are multiple reactions in any system reaction, and some are reversible competing reactions, including the reaction of cellulose sulfate into cellulose acetate, and the reaction of cellulose into cellulose sulfate. It is not even ruled out that the reaction of cellulose acetate into cellulose sulfate, not to mention the existence of many side reactions such as cellulose chain scission and oxidation, will inevitably form certain by-products, which will affect the performance of cellulose acetate and its derivatives. product quality

Corresponding to most general-purpose cellulose acetate and its derivatives, after hydrolysis, filtration and other post-processes, simply removing the by-products can meet the product quality requirements without affecting the downstream performance of the product; but for some demanding applications , only through simple hydrolysis, filtration and other processes to process by-products, it is not enough to make cellulose acetate and its derivatives meet the high-quality requirements; resulting in insufficient stability of cellulose acetate and its derivatives, and the free content exceeds the standard. problems such as degradation

[0004] At present, in the production of cellulose acetate and its derivatives, the original traditional stabilization treatment method only uses simple treatment, high steam consumption, dead angles in the treatment, incomplete treatment of by-products, and problems such as ineffective control, and uniform product quality Poor performance, and can not fully meet the requirements of higher quality cellulose acetate and its derivatives

Moreover, there is no special system equipment for stabilizing cellulose acetate and its derivatives at present, which is specially used for stabilizing cellulose acetate and its derivatives to remove the corresponding by-products, thus resulting in The residual amount of by-products is difficult to control, and the randomness is very large. It is difficult to guarantee the quality of cellulose acetate and its derivatives with high quality requirements

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