Reaction equation
[Ga:1].[OH:2][S:3]([OH:6])(=[O:5])=[O:4]>C(O)C.O>[OH2:2].[S:3]([O-:6])([O-:5])(=[O:4])=[O:2].[Ga+3:1].[S:3]([O-:6])([O-:5])(=[O:4])=[O:2].[S:3]([O-:6])([O-:5])(=[O:4])=[O:2].[Ga+3:1]Participants
Reactant 2
Product 1
Reagents, catalysts & solvents 2
Procedure
4.1 g of gallium sulphate hydrate (the H2O/Ga2 (SO4)3 molar ratio is close to 25) are dissolved in 3.7 g of distilled water. The sulphate is obtained by dissolving gallium (Grade 1 from Johnson Matthey) in hot concentrated H2SO4, in excess, taking up the suspension obtained in ethanol at a concentration of 60% in water at normal temperature, reprecipitation, in this cooled solution, of gallium sulphate hydrate by adding ether followed by filtration and controlled drying. 1.15 g of 85% phosphoric acid (Prolabo) are added with stirring followed by 0.25 g of 40% hydrofluoric acid (Fluka) and, lastly, 4.55 g of di-n-propylamine (Fluka), abbreviated to DPA in what follows. Stirring is continued for approximately 15 minutes. The pH is then 6.
Sources & evidence
- ORD record
- ord-de9085482ee942acb56e459381852f84
- Source dataset
- uspto-grants-1993_09
- Patent number
- US05246902
Linked notes
Loading…