MECHANISM AND METHODS OF CONTROLLING CONVERSION RATE OF CALCIUM-SULFATE DIHYDRATE INTO SEMIHYDRATE IN SULFURIC PHOSPHORIC-ACID SOLUTIONSстатья
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Дата последнего поиска статьи во внешних источниках: 29 мая 2015 г.
Аннотация:The kinetics and mechanism of conversion of crystalline CaSO4.2H2O (DH) into CaSO4 . 0.5H2O (SH) have been studied on samples of analytically pure grade under near-industrial conditions (18-27% P2O5, 4-12% SO3, t = 90-97-degrees-C). The methods developed for effectively controlling the conversion rate of DH into SH have an impact on the initial step (induction period) through an impulse alteration of the solution composition and temperature and through seeding with SH crystals.