Precipitated aragonite and a process for producing it
OwnerIsaac Yanivinventor
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Abstract
Disclosed is a novel form of particulate precipitated aragonite, a novel process for producing it and compositions containing it.
Claims73
A process for producing a particulate precipitated aragonite calcium carbonate, which comprises reacting an aqueous calcium hydroxide slurry with a gas selected from the group consisting of carbon dioxide and a gas containing it, wherein the parameters of said process, including at least one preselected active agent, mode of operation, operating concentrations of raw materials, operating temperature, operating mixer speed and operating pH, are such that (A) the specific gravity of the product after drying for 12 hours at 120° C. is <2.5 g/cm3;
- and (B) the specific gravity of this dry product after ignition for eight hours at 500° C. is <2.5 g/cm3.
A particulate precipitated aragonite which has (A) a specific gravity <2.5 g/cm3 after drying for 12 hours at 120° C., and (B) a specific gravity <2.5 g/cm3 after ignition for eight hours at 500° C. of the product dried in (A).
A particulate precipitated aragonite which has (A) a specific gravity <2.3 g/cm3 after drying at 120° C., and (B) a specific gravity <2.3 g/cm3 after ignition for eight hours at 500° C. of the product dried in (A).
A particulate precipitated aragonite which has a specific gravity <2.1 g/cm3 after drying at 120° C. for twelve hours, and a specific gravity <2.1 g/cm3 after ignition for eight hours at 500° C.
A particulate precipitated aragonite which has (A) a specific gravity <1.8 g/cm3 after drying at 120° C., and (B) a specific gravity <2.3 g/cm3 after ignition for eight hours at 500° C. of the product dried in (A).
A particulate precipitated aragonite which has (A) a specific gravity <1.5 g/cm3 after drying at 120° C., and (B) a specific gravity <2.3 g/cm3 after ignition for eight hours at 500° C. of the product dried in (A).
A particulate precipitated aragonite which has (A) a specific gravity <1.5 g/cm3 after drying at 120° C., and (B) a specific gravity <2.1 g/cm3 after ignition for eight hours at 500° C. of the product dried in (A).
A particulate precipitated aragonite which has a specific gravity <2.5 g/cm3 after ignition for eight hours at 500° C.
A particulate precipitated aragonite which has a specific gravity <2.3 g/cm3 after ignition for eight hours at 500° C.
A particulate precipitated aragonite which has a specific gravity <2.1 g/cm3 after ignition for eight hours at 500° C.
A particulate precipitated aragonite, which after drying it for 12 hours at 120° C., has a Loose Bulk Density (L.B.D.)<0.4 g/cm3.
Dependencies are inferred from the claim text.