autoclave process gypsum to alpha hemihydrate

Calcium sulfate

Calcium sulfate or calcium sulphate alpha hemihydrate and beta gypsum converts to the partially dehydrated mineral called calcium sulfate hemihydrate

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Lecture 3 Flashcards Quizlet

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Patent US4120737 of calcium sulphate alpha

A process for the manufacture of calcium sulphate alpha hemihydrate which comprises the step of interacting an aqueous solution of calcium chloride and a source of sulphate or bisulphate ions in an aqueous system at a temperature above the calcium sulphate hemihydrate/gypsum transition temperature under the reaction conditions

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Alpha Gypsum Production Line

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