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US 4,774,064 AGranted
Conversion of calcium compounds into solid and gaseous compounds
AssigneeMississippi Chemical Corporation
InventorsDavid Arnold, Daniel P. McDonald
Life of this patent
Estimating the term…
Abstract
The invention relates to a process for the conversion of a calcium mineral into a calcium containing solid product and a gaseous stream which comprises subjecting the calcium mineral to a temperature in excess of about 3400 degrees Fahrenheit for less than one minute.
Claims10
A non-plasma process for the conversion of a calcium sulfate or calcium phosphate mineral in a reducing or oxidizing atmosphere into a calcium containing solid product and a gaseous stream, which comprises the steps of:
- (i) mixing said calcium sulfate or calcium phosphate mineral with a fossil fuel, said fossil fuel comprising the only the combustable fuel source in said process;
- and
- (ii) combusting said fossil fuel in the presence of a stoichiometric or excess amount of a source of oxygen, thereby subjecting said calcium sulfate or calcium phosphate mineral to a temperature in excess of 3400.degree. F. for less than one minute.
Dependencies are inferred from the claim text.