Alkali metal bicarbonate particles with exceptional flowability
AssigneeSolvay SA
InventorDavid Jean Lucien SAVARY
Life of this patent
Estimating the term…
Abstract
Powder composition comprising alkali metal bicarbonate particles and an amino acid as additive. A process for preparing alkali metal bicarbonate particles by spray-drying of an aqueous solution comprising 1-10% by weight of alkali metal bicarbonate and an amino acid as additive. A process for preparing alkali metal bicarbonate particles by co-grinding the alkali metal bicarbonate in the presence of an amino acid as additive.
Claims19
A powder composition comprising particles, said particles comprising:
- at least 75% by weight of an alkali metal bicarbonate,
- less than 15% by weight of an alkali metal carbonate,
- less than 20% by weight of water, and
- 0.02 to 10% by weight of an amino acid or a salt thereof.
A process for preparing alkali metal bicarbonate particles comprising:
- co-grinding of the alkali metal bicarbonate in the presence of 0.02 to 10 parts by weight of an amino acid, per 100 parts by weight of the substance undergoing milling or
- spray-drying of an aqueous solution comprising 1 to 10% by weight of the alkali metal bicarbonate and 1 to 10000 ppm of an amino acid or a salt thereof.
A method for reducing the angle of repose, and/or for reducing the mean particle size, and/or increasing the bulk density and/or increasing the dissolution time of alkali metal bicarbonate particles, comprising spray-drying alkali metal bicarbonate in the presence of an amino acid as additive.
(canceled)
Dependencies are inferred from the claim text.