Magnesium ammonium phosphate hexahydrate slurry
AssigneeMagline, Inc.
InventorJ. Richard Green
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Abstract
A magnesium ammonium phosphate slurry and method of producing magnesium ammonium phosphate slurries. The method provides for obtaining a magnesium hydroxide supply having a small particle size of about 1 to 2 microns. Aqua ammonia and phosphoric acid are sequentially added while maintaining the temperature at below 110° F. The magnesium ammonium phosphate slurry formed has a small particle size of about 2 to 5 microns.
Claims15
A magnesium ammonium phosphate slurry, comprising:
- from about 33 wt. % to about 42 wt. % solid magnesium ammonium phosphate hexahydrate particles, wherein at least about 85 wt. % of the particles have a size from about 2 microns to about 5 microns;
- and
- from about 58 wt. % to about 67 wt. % free water,
- where the slurry has a pH from about 7 to about 7.5.
A process for producing a magnesium ammonium phosphate slurry, comprising the steps of:
- (a) producing a magnesium hydroxide slurry having magnesium hydroxide particles wherein at least about 85 wt. % of the particles have a size less than about 2 microns;
- (b) then adding ammonia;
- and
- (c) while maintaining an excess of ammonia and cooling, adding phosphoric acid at a rate so as not to exceed a temperature of about 110° F.
A magnesium ammonium phosphate slurry wherein at least about 85 wt. % of the particles have a size from about 2 microns to about 5 microns produced by the process comprising the steps of:
- (a) producing a magnesium hydroxide slurry having magnesium hydroxide particles wherein at least about 85 wt. % of the particles have a size less than about 2 microns;
- (b) then adding ammonia;
- and
- (c) while maintaining an excess of ammonia and cooling, adding phosphoric acid at a rate so as not to exceed a temperature of about 110° F.
Dependencies are inferred from the claim text.