Polysaccharides are the most widely used biopolymers in the food industry, for example sodium alginate (food additive E401) taken as an anionic substance. Sodium alginate can act as a thickening agent in jelly-like materials, fillings and gravy products, and as a moisture-retaining ingredient in baked goods and other products. The unique industrial source of sodium alginate in modern conditions is sea brown algae (kelp and fucus). In the Caspian basin Ectocarpus algae can be attributed to the brown algae species rich in alginates. Dry Ectocarpus served as the object of scientific analysis. At present, the emergence of new information on the pharmacological parameters of a number of algae biocomponents has led to an increased interest in the study of technological approaches to the production of functional food substances and their biologically active substances. At the same time, algae can act as a raw material base for producing both independent materials and their derivatives in the form of food premixes leading to an increase in the quality indicators of basic materials while maintaining taste sensations or improving the structural organization, external state and increasing storage time. The purpose of this study was to identify the static patterns of the ratio of the extractant masses and the object of study and the kinetics of extraction of the target components from the dry Ectocarpus with a aqueous-alcohol composition to determine the efficiency and rational time of this operation. The type of kinetic dependences of extraction does not contradict the approved and published data in this field with certain specifics for the product under study and the conditions for this operation. This determines the rationality of the original approaches to improve the efficiency of algal raw materials extraction in the above-mentioned extractant environment.

The scientists and technologists focus on studying the traditional technologies of processing geophytes. Modern development trends in biotechnology demand the expansion of the raw material base. The growing needs of medicine, food and feed industries in biologically active substances call for increased attention to new unconventional sources of renewable raw materials. For example, the brown algae of the Caspian Sea can be considered as a perspective object due to a high concentration of the unique biologically active substances. There are discussed the prospects and possibilities of obtaining the alginic acid and its derivatives from the algae of the Volga-Caspian basin. The decisive role of polysaccharides of the algae has been defined. Expediency of using aquatic plants of the Volga-Caspian basin as alternative little-studied raw materials for further processing and obtaining the products of different uses is substantiated. Analysis shows that the list of plants used to isolate alginate or alginate-containing products should be expanded.