Authors: A.I. Egorov

Title of the article: Method for removing adipic acid and using aqueous-acidic effluent of caprolactam production

Year: 2020, Issue: 1, Pages: 56-60

Branch of knowledge: 05.17.01 Technology of inorganic substances

Index UDK: 542.06, 542.63, 542.67, 66.065.5, 661.743.3

DOI: 10.26730/1999-4125-2020-1-56-60

Abstract: One of the most important goals of the enterprise is to reduce emissions of pollutants into the atmosphere and process by-products from the production process. Extraction of adipic acid from effluents allows to reduce atmospheric emissions and make a profit due to a new type of raw material. Adipic acid is the most important dicarboxylic acid obtained on an industrial scale. Demand for it is increasing every year due to the increase in areas of application. The aim of the work is to extract adipic acid from the aqueous-acidic effluent of caprolactam production to obtain a marketable product. The article describes the main methods of using adipic acid and methods of disposal of aqueous-acidic effluent. Methods for the isolation of adipic acid from an aqueous-acidic effluent of caprolactam production are presented. Based on the experimental data, the conditions are determined under which good quality adipic acid is released. It was found that during evaporation, isohydric crystallization and recrystallization, adipic acid is obtained, which can be used in the future as a raw material for the preparation of complex compounds. Experiments were carried out to determine the solubility in water and ethanol, and a comparative IR spectral analysis of samples and adipic acid of the brand “h” was carried out.

Key words: aqueous-acidic effluent utilization plasticizer adipic acid isohydric crystallization

Receiving date: 05.05.2020

Publication date: 11.06.2020

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