Decolorization method of acetyl chloride and application of strong acid oxidant to decolorization of acetyl chloride

Abstract

The invention discloses a decolorization method of acetyl chloride. The decolorization method comprises the following steps: S1: adding a strong acid oxidant to the discolored acetyl chloride while stirring at the temperature not higher than 45 DEG C; controlling the mass ratio of the strong acid oxidant and acetyl chloride to be (1: 250) to (1:1000); S2: rising the temperature until fractions occur, and performing a total reflux reaction; S3: after the total reflux reaction is finished, distilling to be cutoff at the temperature not higher than 85 DEG C. The invention further discloses application of the strong acid oxidant to decolorization of acetyl chloride. The method disclosed by the invention can remove organic compounds containing unsaturated bonds and more active in properties inacetyl chloride to effectively prevent the discoloration of acetyl chloride in transportation and storage to improve use values of acetyl chloride.

Description

technical field [0001] The invention relates to the field of organic matter decolorization, in particular to an acetyl chloride decolorization method and the application of a strong acidic oxidant in the acetyl chloride decolorization. Background technique [0002] During the industrial use of acetic anhydride and methyltrichlorosilane to synthesize methyltriacetoxysilane, the by-product acetyl chloride will be generated. As a raw material for organic synthesis, acetyl chloride is used in the production of pesticides, medicines, new electroplating complexing agents, catalysts for chlorination of carboxylic acids, acetylation reagents, and other fine organic synthesis intermediates. [0003] Due to the existence of other side reactions in the production process, the trace impurities of acetyl chloride with active organic substances are unstable during storage and transportation, which leads to the darkening of the color of acetyl chloride. [0004] At present, it takes about...

AI Technical Summary

Problems solved by technology

[0005] The discolored acetyl chloride contains a small amount of impurities, and after the discolored acetyl chloride is repurified and rectified, it will still change color during the later storage and transportation process, which not only affects the appearance, but also the impurities will affect the acetyl chloride. The reaction has an impact, which is not conducive to its normal use as a reaction raw material in various downstream fields. At present, because acetyl chloride itself is relatively active, activated carbon is usually used to decolorize it, and the effect is poor.