An improved technology for the industrial production of K3 series vitamins based on menadion is reported. The procedure involves the Cr(VI)-promoted oxidation of the corresponding methyl-naphtahelenes with the following purification by precipitation/recrystallization. The best results were obtained under the process temperature between 20-40 °C, solution pH after dilution of MNB in a range of 5.5–5.7, and MNB content in initial solution of 25-30%.
For industrialized economies, a strategically important area is developing active methods for industrial use of carbon dioxide emissions to produce marketable products. A rational approach to the problem of clean generation should be based on the complete coordination of the output parameters of the CO2 discharged from the power plant and the input (working) CO2 parameters of the consumer, which will reduce the cost of emissions conditioning, and maintain power plant efficiency. The CO2 parameters from fossil fuel power plants and CO2 consumers’ potential were analyzed for three main indicators most sensitive to power generation: the amount of CO2, operating pressure, and purity considering the level of technological maturity and market attractiveness. Based on the analysis, three types of energy-industrial symbioses were identified with a cost-effective Power Plant – Consumer model without an intermediate unit for matching input and output parameters of CO2 (without a CO2 capture and conditioning system). A hybrid solution combining modern IGCC and the latest thermodynamic cycles based on oxy-fuel technologies is offered as a generalized configuration of the energy part of the promising complex. The concept and key technological solutions of the promising energy-industrial symbiosis “Power Generation Unit – CO2-based production” are being developed at Ural Federal University. Such symbiosis ensures the low-cost supply of CO2 to industrial consumers using mineralization technology. It will allow utilizing not only technogenic carbon but also ash, slag, and construction industry waste to produce marketable products (cement, concrete, and other materials).
The results of analysis of available information sources of K group vitamins production, which include 2-methyl-1, 4-naphtoquinone (menadione), menadione sodium bisulfite (MSB), menadionenicotinamide bisulfite (MNB) are presented. The main problem of the advanced method of a production, based on using of hexavalent chrome for producing mena-dione as an intermediate compound in the technology is high concentration of chrome in the final product. It is shown that providing of high technical and economical indexes in industrial vitamin production requires researching the chrome displacement at the technological process key stages special aspects and the validation of the target compound effective clearing modes. The statement-type character of the article is aimed to simplify the next publications in this research topic.
Promising areas of application of pigments obtained on the basis of industrial wastes and containing a number of impurities are considered. The quality of the pigment obtained by the alternative technology from iron-containing sludge was evaluated in comparison with the red iron oxide pigments of the KA TU 2322-166-05011907-98 (Russia) and YIPIN S130 (China) grades. Quality indicators are stated and analyzed relative to the requirements of TU 2322-166-05011907-98. Primer GF-021 was analyzed for compliance with GOST 25129-82 and for the presence of anticorrosion properties by the potentiodynamic method and in the salt spray chamber. Pigments in the composition of fine-grained concrete were investigated for their coloring ability and effect on strength characteristics at the age of 1, 3, 7, 28 days. Deviations and competitive advantages of the pigment obtained by alternative technology are determined with respect to the standard both in the composition of the primer GF-021 and in the composition of painted fine-grained concrete.
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