Crystalline calcium sulfate dihydrate and process for making sam

Details Crystalline calcium sulfate dihydrate and process for making sam Crystalline calcium sulfate dihydrate and process for making sam

1977-06-24

1980-01-15

Vertiz, O. R.

Chemistry of inorganic compounds

Sulfur or compound thereof

Oxygen containing

423266, C01F 1146

Patent

active

041839080

ABSTRACT:
By the process of the invention a unique crystalline calcium sulfate dihydrate product is precipitated from an aqueous solution of calcium sulfate and a combination of molecularly dehydrated inorganic phosphates. Also within the scope of the invention is a wallboard manufacturing process and a gypsum wallboard which comprises the gypsum of the invention.

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patent: 3615189 (1971-10-01), Hayakawa
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patent: 4080428 (1978-03-01), Holter et al.

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