Most existing technologies for the production of pectic polysaccharides (PPS) are based on prolonged high-temperature acid hydrolysis extraction in a closed system, which is environmentally unsafe process. In this regard, an urgent problem is the development of fundamentally new environmentally adapted and resource-saving technologies that will allow us to produce a high-quality target product without harming the environment.<br/>To solve this problem, it is necessary to implement the basic principles of green chemistry: the use of renewable raw materials, reducing the level of toxicity of the process without loss of productivity, reducing energy costs, etc. In this regard, we studied the influence of hydrolysis-extraction factors (pH of the hydrolyzing agent, duration of the extraction process, temperature pressure and other) on the output and physico-chemical parameters of the PPP, the raw material for which was industrial agricultural waste. The results formed the basis of new technologies: baroextraction in static mode (BSM), combined fractionation (CFr) and baroextraction in dynamic mode (BDM). It has been proven that BSM allows you to reduce the duration of the process to 3-5 minutes, use a hydrolyzing agent with a sparing pH value (3.5-5.6), increase the yield of the target product by 1.5-2 times, depending on the raw material source. CFr, due to the continuous flow of the reaction medium, allows not only to increase the yield of PPSs and optimize their quality, but also to obtain substances for the food industry and medicine. BDM, due to the effect of pressure (1.0-2.5 atm.), can significantly reduce the process of combined fractionation of pectin hydrolyzate in the stream up to 5-7 minutes. without the use of aggressive solution, leading to an increase in the yield of target products with optimal physicochemical parameters and high molecular weight.<br/>Thus, the obtained results prove the effectiveness of the developed technologies, based on the principles of green chemistry, for the obtain of pectin polysaccharides from a wide range of raw materials.

Principles of green chemistry in pectin production

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

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