Sodium zirconium carbonate and zirconium basic carbonate and methods of making the same
First Claim
1. A method of making a sodium zirconium carbonate comprising heating a mixture of zirconium oxychloride and soda ash at a sufficient temperature and for a sufficient time to form said sodium zirconium carbonate.
0 Assignments
0 Petitions
Accused Products
Abstract
A method of making sodium zirconium carbonate is described which involves forming a mixture of zirconium oxychloride with soda ash and then heating at a sufficient temperature and for a sufficient time to form the sodium zirconium carbonate. Subsequent washing and filtration steps can further form parts of this process. A novel sodium zirconium carbonate is further described which contains from about 2 wt % to about 5 wt % Na+; from about 44 wt % to about 50 wt % ZrO2; from about 12 wt % to about 18 wt % CO32−; and from about 32 wt % to about 35 wt % H2O. Methods of making zirconium basic carbonate are further described which involve titrating an aqueous slurry of sodium zirconium carbonate to a pH of from about 3.5 to about 4.0 with an acidic agent wherein the sodium zirconium carbonate has a moisture content of from about 15% to about 25% LOD in solid form. The process further involves washing the aqueous slurry containing the formed zirconium basic carbonate with water. A novel zirconium basic carbonate is further disclosed which has a minimum adsorption capacity of from about 30 to about 35 mg/PO4-P/gm SCZ; a minimum HCO3− content of from about 2 to about 4 mEq HCO3-gm/SCZ; a leachable Na+ content of from about 1.5 to about 2.0 mEq Na+/gm SCZ; and/or a pH range of titrated sodium zirconium carbonate of from about 6 to about 7. A method of making zirconium phosphate is also disclosed which involves treating sodium zirconium carbonate with caustic soda to from an alkaline hydrous zirconium oxide which is subsequently heated and mixed with phosphoric acid to obtain an acid zirconium phosphate which can be titrated with caustic soda to achieve the desired zirconium phosphate. Novel zirconium phosphates are also disclosed as well as uses for the above zirconium containing materials.
-
Citations
51 Claims
- 1. A method of making a sodium zirconium carbonate comprising heating a mixture of zirconium oxychloride and soda ash at a sufficient temperature and for a sufficient time to form said sodium zirconium carbonate.
-
23. A method of making sodium zirconium carbonate comprising mixing zirconium oxychloride with soda ash and agitating to form a solution mixture at ambient temperatures;
- heating said mixture of zirconium oxychloride and soda ash at a sufficient temperature and for a sufficient time to form said sodium zirconium carbonate, wherein said sufficient temperature is the boiling temperature of the mixture of zirconium oxychloride and soda ash;
after said heating, filtering off the sodium zirconium carbonate;
after filtering, washing any chloride or any impurities from said sodium zirconium carbonate;
titrating an alkaline slurry comprising said sodium zirconium carbonate with at least one acidic agent to obtain a pH of less than about 7.0;
after titrating, filtering off said sodium zirconium carbonate and washing said sodium zirconium carbonate; and
after washing, drying said sodium zirconium carbonate.
- heating said mixture of zirconium oxychloride and soda ash at a sufficient temperature and for a sufficient time to form said sodium zirconium carbonate, wherein said sufficient temperature is the boiling temperature of the mixture of zirconium oxychloride and soda ash;
-
24. A method of making a zirconium basic carbonate comprising titrating an aqueous slurry of sodium zirconium carbonate to a pH of from about 3.5 to about 4.0 with a acidic agent, wherein said sodium zirconium carbonate has a moisture content of from about 15% to about 25% LOD in solid form;
and washing said aqueous slurry containing the zirconium basic carbonate with water. - View Dependent Claims (25, 26, 27, 30, 31)
-
28. A zirconium basic carbonate having:
-
Na+ of less than about 1000 ppm;
a ZrO2 wt % of from about 35 wt % to about 40 wt %;
and a CO32−
of from about 8 wt % to about 10 wt %, based on the weight of the zirconium basic carbonate. - View Dependent Claims (29)
-
-
32. A sodium zirconium carbonate comprising from about 2 wt % to about 5 wt % Na+;
-
from about 44 wt % to about 50 wt % ZrO2;
from about 12 wt % to about 18 wt % CO32−
; and
from about 32 wt % to about 35 wt % H2O, based on the weight of the sodium zirconium carbonate. - View Dependent Claims (33, 34)
-
-
35. A method of making zirconium phosphate comprising treating sodium zirconium carbonate with caustic soda to form alkaline hydrous zirconium oxide;
-
heating a slurry comprising said alkaline hydrous zirconium oxide and adding phosphoric acid; and
recovering said acid zirconium phosphate. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43, 44, 45)
-
-
46. A zirconium phosphate having a Na+ of from about 4 to about 6%;
-
a ZrO2 wt % of from about 34 wt % to about 37 wt %;
a PO4 wt % of from about 41 wt % to about 43 wt %; and
a H2O wt % of from about 14 wt % to about 18 wt %, based on the weight of the zirconium phosphate. - View Dependent Claims (47, 48, 49, 50, 51)
-
Specification