PROCESS FOR PRODUCING ALPHA-HEMIHYDRATE GYPSUM
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United States of America Patent
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Issued Date -
Aug 20, 2009
app pub date -
Feb 14, 2008
filing date -
Feb 14, 2008
priority date (Note) -
Abandoned
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Abstract
A process for producing alpha-hemihydrate gypsum from dihydrate gypsum includes feeding a slurry comprising the dihydrate gypsum and water into a heating tube, heating the heating tube at a temperature effective to generate steam and pressure from the water, wherein the steam and pressure are effective to convert the dihydrate gypsum to the alpha-hemihydrate gypsum, and withdrawing the alpha-hemihydrate gypsum from the heating tube.
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