Process for increasing the water solubility of gypsum

Details Process for increasing the water solubility of gypsum Process for increasing the water solubility of gypsum

1998-04-20

1999-10-12

Green, Anthony

Compositions: coating or plastic

Coating or plastic compositions

Inorganic settable ingredient containing

106783, 423555, C04B 1100

Patent

active

059649402

ABSTRACT:
A process for increasing the water solubility of gypsum in which gypsum is ground to about 5 to 50 mesh U.S. Standard Sieve Size, about 5 to 95 parts by weight of ground gypsum are mixed with about 2 to 25 parts by weight concentrated sulfuric acid having a concentration of about 93 to 98.5% H.sub.2 SO.sub.4, optionally in the presence of about 5 to 20 parts by weight water, and the resulting product is dried at a temperature of about 100-125.degree. C. to form a water-soluble, granular, solid, free-flowing gypsum product having a water solubility increased by about 2- to greater than 350-fold.

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