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METHOD OF PRODUCTION OF GRANULATED OXYGEN-CONTAINING BLEACHING AGENT ON BASE OF PEROXOSOLVATE OF SODIUM CARBONATE AND DEVICE FOR REALIZATION OF THIS METHOD
METHOD OF PRODUCTION OF GRANULATED OXYGEN-CONTAINING BLEACHING AGENT ON BASE OF PEROXOSOLVATE OF SODIUM CARBONATE AND DEVICE FOR REALIZATION OF THIS METHOD
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机译:基于碳酸钠过氧溶剂的粒状含氧漂白剂的生产方法及实现该方法的装置
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FIELD: chemical industry.;SUBSTANCE: proposed method includes delivery of aqueous solution of hydrogen peroxide and soda from reservoirs of 1 and 2 to reactor 3. Reaction mass thus obtained is delivered to double-screw mixer 6 communicated with drier 7. Part of dried granules is returned from drier 7 to mixer 6 and other part is directed to classifier 8; fraction at size of particles from 0.1 to 1.00 mm is directed from intermediate part of said classifier to storage reservoir 9 for target fraction granules. Then, granules are fed to vacuum drier in the scope of no more than 50% of its inner volume. Solution preparation unit 37 is used for preparation of aqueous solution of stabilizing agent- sodium, sodium sulfate, sodium carbonate, sodium silicate or their mixtures. Concentration of stabilizing agent solution is 5-15 mass-% and volume is 0.215-0.235 of volume of granules. Vacuum drier 11 and measuring reservoir 10 are evacuated simultaneously to residual pressure not exceeding 13.33 kPa. Granules are evacuated at heating to 55°C and are mixed with stabilizing agent solution first in vacuum followed by jumpwise rise of pressure to atmospheric level or to excessive pressure of 10 kPa; procedure is continued for 0.5-1.0 min. Then vacuum drying is performed at constant or periodic mixing. Moisture content of finished product doe not exceed 1.05% at stability of 59.93-65.74%.;EFFECT: enhanced efficiency.;12 cl, 1 dwg, 1 tbl
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