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Class Information
Number: 423/175
Name: Chemistry of inorganic compounds > Treating mixture to obtain metal containing compound > Alkaline earth metal (mg, ca, sr, or ba) > Treating impure carbonate (e.g., oyster shells, etc.) > Calcining
Description: Processes which include the step of heating the impure carbonate.


Sub-classes under this class:

Class Number Class Name Patents
423/176 Utilizing vacuum or steam 5
423/177 With agitating or at specified temperature 24


Patents under this class:

Patent Number Title Of Patent Date Issued
6706197 Method for reducing phosphorus in a body of water Mar. 16, 2004
6136144 Method of removing sulfur from a process gas stream using a packed bed calcinator Oct. 24, 2000
RE36369 Stabilized pressure-hydrated magnesium hydroxide slurry from burnt magnesite and process for its production Nov. 2, 1999
5824244 Lime mud regeneration process Oct. 20, 1998
5711802 Heat treatment of lime sludge Jan. 27, 1998
5487879 Stabilized, pressure-hydrated magnesium hydroxide slurry from burnt magnesite and process for its production Jan. 30, 1996
5409714 Antimicrobial agent and method for sustaining freshness of food Apr. 25, 1995
5380505 Production of low sulfur content lime from limestone Jan. 10, 1995
5378319 Lime mud calcining using dielectric hysteresis heating Jan. 3, 1995
5354375 Lime sludge treatment process Oct. 11, 1994
5260041 Method for the calcination of limestone Nov. 9, 1993
5230880 Process and device for forming calcium oxide Jul. 27, 1993
5110567 Method and apparatus for heat treatment of lime mud May. 5, 1992
4889592 Process and apparatus for control in burning and slaking of lime and causticizing Dec. 26, 1989
4871519 Method of making magnesium oxide and hydrates thereof Oct. 3, 1989
4828620 Calcination of calcium carbonate and blend therefor May. 9, 1989
4810190 Method and apparatus calcining mineral raw materials utilizing solid fuel Mar. 7, 1989
4748010 Energy conserving limestone calcining system May. 31, 1988
4720375 Process for producing magnesium oxide Jan. 19, 1988
4707350 Process and device for the decarbonation of minerals by fluidized bed calcination Nov. 17, 1987
4670228 Process for the recovery of valuable metals, particularly rare earths and similar metals, from a carbonate-containing raw material Jun. 2, 1987
4617059 Demolition agent for brittle materials Oct. 14, 1986
4565579 Nonexplosive chemical composition for gently breaking rock or concrete mass Jan. 21, 1986
4548796 Process for the production of pure burnt lime Oct. 22, 1985
4508690 Method of producing very pure magnesium oxide Apr. 2, 1985
4503019 Blends of magnesium oxide and copperoxychloride as calcium oxide deposit inhibitors in coal fired lime kilns Mar. 5, 1985
4483831 Method and apparatus for calcining lime Nov. 20, 1984
4451443 Causticization method May. 29, 1984
4414186 Method and apparatus for calcining limestone in a shaft kiln Nov. 8, 1983
4391671 Method of producing lime in a rotary kiln Jul. 5, 1983
4389323 Process of making two uniform grades of calcium magnesium acetate Jun. 21, 1983
4389381 Limestone calcination Jun. 21, 1983
4382779 Regenerative shaft furnace for burning carbonate-containing raw materials May. 10, 1983
4382911 Hydration of lime May. 10, 1983
4368177 Process of producing quicklime by calcining in a rotary kiln Jan. 11, 1983
4321239 Method of thermal treatment of a carbonate suspension Mar. 23, 1982
4315735 Process for calcining mineral raw materials in a uniflow regenerative shaft furnace Feb. 16, 1982
4287160 Process and shaft kiln for the burning of lime or similar bulk materials Sep. 1, 1981
4286944 Installations for the calcination of alumina and similar products Sep. 1, 1981
4220631 Process of calcining limestone or hydrated lime in a rotary kiln Sep. 2, 1980
4212850 Method for the calcining of lime Jul. 15, 1980
4210632 Process and apparatus for calcining limestone Jul. 1, 1980
4201750 Processing of breunnerite to recover magnesium compounds May. 6, 1980
4127406 Process for the heat treatment of fine material Nov. 28, 1978
4031183 Process for calcining limestone Jun. 21, 1977
4017391 Water treatment system Apr. 12, 1977
3998928 Process for calcining pellet-shaped calcium hydroxide Dec. 21, 1976
3991172 Process for the production of reactive calcium oxide Nov. 9, 1976



 
 
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