Calcium Sulfate Dihydrate → Calcium Sulfate, Hemihydrate

HRID 848438Notes

Reaction equation

HRID 848438 reaction equation
O.O.[S:3]([O-:7])([O-:6])(=[O:5])=[O:4].[Ca+2:8]>O>[OH2:4].[S:3]([O-:7])([O-:6])(=[O:5])=[O:4].[Ca+2:8].[Ca+2:8].[S:3]([O-:7])([O-:6])(=[O:5])=[O:4]

Participants

3

Reactant 1

HCID 24928Calcium Sulfate Dihydrate

Product 1

HCID 3033839Calcium Sulfate, Hemihydrate

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

10 grams of calcium sulfate dihydrate fibers, prepared in accordance with Example 2, are heated in the autoclave in a water vapor atmosphere (at a pressure of 6 bars) for 6 hours at 130°, becoming substantially dehydrated and forming essentially monocrystalline calcium sulfate hemihydrate fibers.

Sources & evidence

ORD record
ord-234ad53c60974881935454fd368c28da
Source dataset
uspto-grants-1981_10
Patent number
US04296089

Reaction notes

Loading…