The process of obtaining fertilising precipitate based on the interaction of off-balance ore phosphorites of Central Kyzylkum and chemically enriched phosphorite concentrate with hydrochloric acid, followed by precipitation of hydrochloric acid extraction with suspension of calcium hydroxide. The optimal parameters of the precipitation were determined for the first time in our country. Influence of calcium hydroxide norms on degree precipitation hydrochloricphosphoric acid extracts are studied. The resulting samples of precipitates under optimal conditions contain in their composition 23.63-24.19% P 2 O 5(t.) , 21.09-21.38% P 2 O 5accep. by 2% citric acid to those 26.97-28.41% CaO (t.) , 23.52-25.59% of CaO accep. by 2% citric acid. The degree of precipitation equal 94.01-98.05%. Physical and chemical studies (x-ray phase analysis) of the mineralised mass and products of its processing were also carried out.

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The research work established the distinctive features of the composition and properties of local Paulownia woods - raw materials for the production of highly energy-efficient activated adsorbents. The colloidal, physicochemical properties of the obtained adsorbents from Paulownia wood were revealed. The adsorption properties of the developed adsorbents have been established for deep purification of water-alcohol solutions. In the article, research work was carried out on the wooden stems of a number of trees growing in the territory of Uzbekistan. According to the results of the experimental research, the base of raw materials meeting the requirement of being an adsorbent was researched, and their physico-chemical, colloidal properties were studied. It was found that Pavlovnia wood with high density and porosity can meet the requirement to be an adsorbent. In the study, its porosity, moisture level, ash content, and adsorbent productivity were studied. Based on the obtained results, a series of raw materials that can meet the demand of adsorbent was formed.