Patents for C01F 11 - Compounds of calcium, strontium, or barium (8,019)
09/1978
09/12/1978US4113835 Removing phosphate impurities from gypsum
09/05/1978CA1037669A1 Compacted calcium chloride particulate
08/1978
08/29/1978US4110432 Prophylaxis
08/29/1978US4110402 Recovery of strontium from brine that contains strontium and calcium
08/22/1978US4108958 Extraction of Cu(II), Fe(III), Ni(II), Co(II), Cd(II), Zn(II), Ca(II) and Mg(II) metal values using 2-hydroxy iminoacetic acids
08/22/1978US4108957 Aqueous slurry, forming calcium monophosphate, adding oxalic acid to precipitate calcium
08/15/1978US4106918 Method of recovering fluorine from vapor of crude phosphoric acid solution
08/15/1978CA1036572A1 Process for preparing materials having improved mechanical and thermal properties and materials obtained thereby
07/1978
07/25/1978US4102989 Simultaneous reductive and oxidative decomposition of calcium sulfate in the same fluidized bed
07/18/1978US4101638 Process for the manufacture of a slurry containing highly concentrated phosphoric acid and calcium sulfate hemihydrate in a readily filterable form
07/11/1978US4100264 From calcium chloride and diammonium carbonate
07/11/1978US4100260 Regenerative method for quantitative removal of sulfur dioxide from stack gases
07/11/1978US4100254 Industrial process of preparing magnesia of high purity
07/04/1978US4098873 Counter-current process for passing a solid particulate reactant to a liquid reactant
07/04/1978US4098871 Process for the production of powdered, surface-active, agglomeratable calcined material
06/1978
06/27/1978CA1033772A1 Cement manufacture
06/06/1978US4093706 Method of production of synthetic fluorite having a selected grain size
05/1978
05/30/1978US4092402 Method for removing sulfur dioxide from exhaust gas
05/30/1978US4092401 Process for reutilization of iron chlorides in aqueous solution
05/23/1978US4091080 Method for the production of alpha type calcium sulfate hemihydrate
05/09/1978US4088738 Process for producing phosphoric acid using mixed acid feed and a dicalcium phosphate intermediate
04/1978
04/25/1978US4086322 Acidulation of phosphate rock with solution containing primary potassium phosphate, precipitation of monocalcium phosphate and potassium fluosilicate
04/25/1978US4086099 Method of preparing plaster
04/18/1978US4085194 Absorption in sea water, formation of sulfites, oxidation to sulfates
04/11/1978US4083942 Process for producing metal bromides
04/11/1978US4083929 Beneficiation of phosphate rock
03/1978
03/28/1978US4081363 Mineral beneficiation by froth flotation: use of alcohol ethoxylate partial esters of polycarboxylic acids
03/21/1978US4080428 Process for the purification of flue and other waste gas
03/21/1978US4080427 Method of desulfurizing exhaust gases by wet lime-gypsum process
03/07/1978US4078043 Process for preparing calcium fluoride from hexafluoro silicic acid and production of silicic acid gel or active silicic acid from said calcium fluoride
02/1978
02/28/1978US4076776 Calcium chloride prilling
02/14/1978US4073864 Method of desulfurizing exhaust emission using pulverized slag as absorbent
01/1978
01/17/1978US4069300 Oxidation of calcium sulfite, surfactant
01/03/1978US4066735 Process for demineralization of crustacea shells
12/1977
12/27/1977US4065320 Drying cement pellets
12/06/1977US4061715 Hydrogen, water vapor
12/06/1977US4061593 Stabilization of calcium oxide sulfate trapping materials
12/06/1977US4061476 Sorption
11/1977
11/29/1977US4060586 Recovery of fluorides from gypsum
11/29/1977US4060585 From barite, reduction with carbon, oxidation
11/22/1977US4059674 Method for manufacturing phosphoric acid and gypsum
10/1977
10/11/1977US4053572 Process for preparing essentially pure barium fluoride crystals
09/1977
09/20/1977US4049774 Process for reducing formation of gypsum scale durng the washing of calcium sulphate hemihydrate crystals
09/13/1977US4048287 Sulfur recovery method
09/06/1977US4046856 Magnesium hydroxide absorber, gypsum
08/1977
08/30/1977US4045341 Method for the disposal of waste water containing ammonium ions, sulfate ions and organic substances
08/23/1977US4044111 Method of treating calcium nitrate contained in denitration waste liquid
08/23/1977US4043803 Process for the manufacture of a compacted synthetic flux based on calcium fluoride
08/09/1977US4040803 Wet waste flue gas desulfurizing process using lime as absorbent
08/02/1977US4039616 Process for the manufacture of stabilized, hardenable calcium sulphate by reacting crude phosphate with sulphuric acid
07/1977
07/26/1977US4038367 Process for the removal of SOx and NOx from waste gases using alkali metal or alkaline earth metal iodide
07/26/1977US4038366 Method for removing hydrogen sulfide
06/1977
06/21/1977US4031195 Regenerative method removal of sulfur dioxide from stack gases
06/21/1977US4031193 Process for preparing calcium fluoride from hexafluoro silicic acid
06/21/1977US4031183 Process for calcining limestone
06/14/1977US4029512 Gypsum suspension, saturated steam, calcining
06/07/1977US4028237 Method and apparatus for treatment of fluorine-containing waste waters
05/1977
05/31/1977US4026991 Process for stabilizing lime mud
05/31/1977US4026990 Production of low-fluorine gypsum as a by-product in a phosphoric acid process
05/17/1977US4024220 Flue gas scrubbing and conversion of calcium sulfite to calcium sulfate
04/1977
04/19/1977US4018877 Production of calcium carbonate
04/19/1977US4018875 Ammonium oxalate process
04/12/1977US4017592 Process for production of aqueous hypochlorous acid solution
03/1977
03/22/1977US4013590 Alumina catalysts
03/22/1977US4013578 Calcium carbonate
03/01/1977US4010245 Production of hydrogen fluoride and calcium sulfate
02/1977
02/22/1977US4009244 Process for removing oxides of nitrogen and sulfur from exhaust gases
02/22/1977US4009215 Trichlorofluoromethane, dichlorodifluoromethane, carbon tetrachloride
02/15/1977US4008309 Process for crystallizing calcium nitrate
02/01/1977US4006215 Recovering iron, nickel, or cobalt from sulfate solution
02/01/1977US4006080 Process for the treatment of acidic waste liquid containing dissolved salts
12/1976
12/21/1976US3998928 Process for calcining pellet-shaped calcium hydroxide
12/21/1976US3998596 Calcining and hydrating chambers
12/07/1976US3996133 From a calcium and phosphate-bearing-sludge
11/1976
11/16/1976US3992217 Hydration, carbonation
11/09/1976US3991172 By decomposing calcium carbonate
11/09/1976US3990966 Flotation process for purifying calcite
11/09/1976US3990642 By removal of discoloring contaminants
11/02/1976US3989797 Process for removing sulfur oxides from gas streams
11/02/1976US3989796 Method for removing sulfur dioxide in the form of calcium sulfite from combustion exhaust gas
10/1976
10/26/1976US3988418 Hydrometallurgical production of technical grade molybdic oxide from molybdenite concentrates
10/19/1976US3987149 Method for removing sulfur dioxide from exhaust gas
10/12/1976US3985860 Reacting sulfur dioxide with sodium carbonate, calcium hydroxide or carbonate to form calcium sulfite which is oxidized to calcium sulfate
09/1976
09/28/1976US3982930 Drilling, strontium nitrate
09/21/1976US3981815 Process for utilizing collected material removed from effluent gas
09/14/1976US3980756 Air pollution control system
09/14/1976US3980240 Brightening of natural calcitic ores
08/1976
08/31/1976US3978298 Miniature switch having pivotal actuator with budging contact and position safety structure
08/24/1976US3976447 Removal of hydrogen fluoride from gaseous mixture by absorption on alkaline earth metal fluoride
08/03/1976US3972981 Method of preventing gypsum scale formation in phosphoric acid plant filters
07/1976
07/13/1976US3969493 Thermochemical process for manufacture of hydrogen and oxygen from water
06/1976
06/29/1976US3966894 Method of preparing barium hydroxide
06/29/1976US3966427 Production of briquettes
06/08/1976US3961903 Apparatus for reclaiming limestone mud
06/01/1976US3961105 Method for the manufacture of coated calcium sulfate whisker fibers
06/01/1976US3961027 Cyclic process for re-use of waste water generated during the production of UO2
06/01/1976US3961021 Scrubbing with alkali sulfite, reaction with calcium compound to produce gypsum
05/1976
05/25/1976US3959132 Hydrolysis to fluorides for precipitation
05/18/1976US3957678 Method of manufacturing a luminescent sulfide
05/11/1976US3956456 Spiral air flow
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