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Class Information
Number: 423/173
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.)
Description: Processes wherein the original mixture contains the carbonate of an alkaline earth metal.

Sub-classes under this class:

Class Number Class Name Patents
423/175 Calcining 52
423/174 Forming calcium carbide 5

Patents under this class:

Patent Number Title Of Patent Date Issued
8703079 Method for treating lime mud Apr. 22, 2014
8673247 Method for operating a regenerative shaft furnace for producing lime Mar. 18, 2014
7749483 Method for producing alkaline earth metal oxides Jul. 6, 2010
7438756 Method of improving material comprising a pozzolanic component Oct. 21, 2008
7396521 Heat transfer fluids with hetero-nanocapsules Jul. 8, 2008
7393558 Methods for producing protective coatings Jul. 1, 2008
7252713 Mesoporous glass as nucleant for macromolecule crystallisation Aug. 7, 2007
6777542 Method and apparatus for reducing the calcium and phosphorous ratio and increasing crude protein in shellfish waste meal Aug. 17, 2004
5711802 Heat treatment of lime sludge Jan. 27, 1998
5690897 Method for purification of calcium carbonate Nov. 25, 1997
5547640 Compact high temperature air purifier Aug. 20, 1996
5498362 Process for the production of road deicers from water plant residuals Mar. 12, 1996
5476642 Magnesium hydroxide and process for production thereof Dec. 19, 1995
5409714 Antimicrobial agent and method for sustaining freshness of food Apr. 25, 1995
5188814 Method of bleaching Feb. 23, 1993
5122350 Method for preparing calcium magnesium acetate and a residual mineral product by selectively calcining dolomite Jun. 16, 1992
5084254 Natural calcium carbonate ores Jan. 28, 1992
4978516 Process for treating talc Dec. 18, 1990
4937056 Process for obtaining high purity magnesium compounds from magnesium containing materials Jun. 26, 1990
4875938 Method of making a mortar binder and product Oct. 24, 1989
4824653 Method of bleaching limestone Apr. 25, 1989
4770860 Porous hydroxyl apatite material Sep. 13, 1988
RE32609 Continuous process for the manufacture of calcium magnesium acetate deicer Feb. 23, 1988
4606836 Continuous process for the manufacture of calcium magnesium acetate deicer Aug. 19, 1986
4572825 Process for bleaching natural chalk Feb. 25, 1986
4508690 Method of producing very pure magnesium oxide Apr. 2, 1985
4488978 Coarse-particle calcium/magnesium acetate suitable for roadway and walkway deicing, and process for its manufacture Dec. 18, 1984
4474737 Process of purification of magnesic raw material Oct. 2, 1984
4444672 Process of making calcium acetate deicing agents and product Apr. 24, 1984
4430242 Novel road and highway deicer and traction agent, and process for its manufacture Feb. 7, 1984
4426308 Process of making calcium acetate deicing agents Jan. 17, 1984
4389323 Process of making two uniform grades of calcium magnesium acetate Jun. 21, 1983
4377488 Process of making calcium acetate deicing agents Mar. 22, 1983
4239736 Method for increasing the brightness of limestone Dec. 16, 1980
4238459 Chemical beneficiation of phosphatic limestone and phosphate rock with .alpha.-hydroxysulfonic acids Dec. 9, 1980
4176157 Calcining calcium sulphate dihydrate Nov. 27, 1979
4154802 Upgrading of magnesium containing materials May. 15, 1979
4066735 Process for demineralization of crustacea shells Jan. 3, 1978

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