| Summary: | Based on the results of a comprehensive research of the nature and colloid-chemical properties of selected local clays before and after their acid activation, it has been established that Shafrikan bentonite (Bukhara region) and Mayskiy clay (Tashkent region) are promising raw materials for obtaining effective adsorbents for the oil and fat industry. The new types of adsorbents in cottonseed oil bleaching technology have been studied. The main sorption properties of local clays as adsorbents have been determined. The dependence of the chromaticity of cottonseed oils on the sorption properties of innovative types of adsorbents has been established. The temperature limits of the first, second and third “effect” for selected samples of local clays has been established by the method of differential thermal analysis. A spectral method has been developed for quantitative evaluation of the selectivity of adsorbents in the bleaching of vegetable oils, in particular cottonseed oils. Mathematical models have been developed for obtaining activated adsorbents from local clays, and based on them the optimal modes of recommended processes have been selected. The intensifying role of vacuum in the production of activated adsorbents from local clays has been established.
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