| Patents for C01F 11 - Compounds of calcium, strontium, or barium (8,019) |
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| 09/10/1992 | DE4102685A1 Biological purificn. of waste water |
| 09/08/1992 | US5145902 Low viscosity |
| 09/08/1992 | CA1307093C Process for the fabrication of hydrofluoric acid by reacting sulfuric acid on spath fluor in a rotating furnace |
| 08/27/1992 | DE4105856A1 Use of calcium sulphate with low content of water of crystallisation - as additive to fodder, binding water and improving flow |
| 08/26/1992 | EP0499666A1 Process for the preparation of very pure calcium carbonate powder |
| 08/19/1992 | EP0498844A1 Apparatus and process for the production of acetylene. |
| 08/19/1992 | CN1063662A Sodium hydrate preparing method using barium salt and sodium sulfate as material |
| 08/19/1992 | CN1063661A Process for production of phosphoric acid and hydrogen fluoride from phosphate rock and fluosilicic acid |
| 08/18/1992 | US5139749 For preheating incoming solids by use of hot exhaust gases |
| 08/11/1992 | CA1306098C Method and structure for forming a reaction product |
| 08/04/1992 | US5135734 Process for removing a residue containing sodium sulphate |
| 07/29/1992 | EP0496432A1 Process for cleaning gases and exhaust gases |
| 07/29/1992 | EP0496295A1 High-Performance flue-gas desulfurization process and apparatus |
| 07/29/1992 | EP0495937A1 Continuous production of fertilizing salts with derivatives of strontium and gypsum |
| 07/23/1992 | WO1992012095A1 Production of phosphoric acid and hydrogen fluoride |
| 07/22/1992 | EP0494933A1 Tetrathiocarbonate process |
| 07/22/1992 | CN1062886A Production method of barium hydroxide combined with barium carbonate |
| 07/22/1992 | CN1062883A Comprehensive utilization of boron-magnesium mine |
| 07/21/1992 | US5132253 Sol-gel method for making ceramic materials |
| 07/21/1992 | US5132027 Desulfurizaiton of Exhaust Gases |
| 07/15/1992 | CN1062671A Wet-type waste gas desulphurizing system having air-supplying device |
| 06/24/1992 | EP0491141A1 Sol-gel method for making ceramic materials |
| 06/18/1992 | CA2054871A1 Sol-gel method for making ceramic materials |
| 06/17/1992 | EP0490298A1 Wet-type exhaust gas desulfurization system having a means for supplying air |
| 06/16/1992 | US5122505 Carbonate-free inorganic nitrates or oxides and process thereof |
| 06/16/1992 | US5122353 Using alkali and alkaline earth sorbents |
| 06/16/1992 | US5122352 Heat exchanger and pollutant removal system |
| 06/11/1992 | WO1992009528A1 Method for preparing calcium and/or magnesium hydroxide, and use thereof |
| 06/10/1992 | CN1061764A Prepn. of ultra-micropowder of high purity barium titanate |
| 06/09/1992 | US5120521 Introducing carbon dioxide into colored aqueous slurry of calcium hydroxide and watersoluble dye |
| 06/04/1992 | DE4138866A1 Preventing catalyst loss in calcium sulphate prodn. from sulphite - using soluble sulphate to prevent pptn. and occlusion of transition metal catalyst |
| 06/03/1992 | EP0488603A2 Biaxially oriented polyester film |
| 06/02/1992 | US5118478 Extractrion process for removing and recovering metals from aqueous solutions |
| 05/30/1992 | CA2036329A1 Absorption of liquids by calcium sulphate |
| 05/27/1992 | CN1061392A Process for manufacture of crystal calcium carbonate |
| 05/27/1992 | CN1061391A Process for production of fine and lightweight calcium carbonate from mud of calcium carbide |
| 05/19/1992 | US5114690 Two stage sorption of sulfur compounds |
| 05/13/1992 | CN1016602B Method for purifying calcium nitrate mell solution which is separated from the mixture obtained by the solution of rock phosphate with nitric acid |
| 05/13/1992 | CN1016601B Production and preparation method of barium hydroxide |
| 05/07/1992 | DE4035042A1 Working-up flue-ash obtd. from exhaust gas cleaning - by forming suspension with sulphuric acid and recovering calcium sulphate as filter cake |
| 05/06/1992 | EP0483889A1 Process for the purification of gypsum |
| 05/05/1992 | US5110567 Thickening by filtration, drying in pneumatic drier heated with flue gases from reburning kiln, roasting |
| 05/05/1992 | US5110474 Monitoring nuclear waste pollution |
| 05/05/1992 | US5110358 Compatibility agent for aqueous polypigmentary suspensions containing hydrated calcium sulfate |
| 05/05/1992 | US5110289 Apparatus for heat treatment of lime mud |
| 04/29/1992 | CN1016412B Technology for producing barium hyclroxide monohyolrate via dehyclration of barium hydroxide octahydrate |
| 04/28/1992 | US5109090 Compatibility agent for aqueous polypigmentary suspensions containing hydrated calcium sulfate |
| 04/21/1992 | US5106600 Process for producing tabular acicular gypsum crystals |
| 04/16/1992 | WO1992006037A1 Carbonate-free inorganic nitrates or oxides and process thereof |
| 04/15/1992 | EP0480587A2 Precipitated calcium carbonate |
| 03/28/1992 | WO1992006038A1 Precipitated calcium carbonate |
| 03/28/1992 | CA2026364A1 Desulfurization of solid carbonaceous fuels by coagglomeration with sulfur sorbents |
| 03/25/1992 | EP0476354A2 Process and plant for treating a scrubber sludge resulting from flue gas desulfurization |
| 03/17/1992 | US5096685 Heating silicon dioxide-containing material with silicon and/o r carbon-containing material at subatmospheric pressure in pre sence of nonoxidizing gas, transferring condensed silicon mono xide from reaction chamber to collection chamber |
| 03/11/1992 | CN1059319A Combined production technology of strontium carbonate-refined sodium sulfite |
| 03/05/1992 | DE4027237A1 High solids aq. dispersions of flue gas gypsum - contg. a surface active sulphonate and complexing agent |
| 03/03/1992 | US5093093 Milling, granulation, fruit acid as retarder, injection mortar |
| 03/03/1992 | CA1296531C Chlorination of ores containing alkali or alkaline earth values |
| 02/06/1992 | WO1992001630A1 Continuous production of fertilizing salts with derivatives of strontium and gypsum |
| 02/06/1992 | WO1992001629A1 Vaterite and production method |
| 02/04/1992 | US5085800 Glycol dispersion of precipitated calcium carbonate |
| 01/29/1992 | EP0468719A1 Precipitated calcium carbonate |
| 01/29/1992 | CN1058200A Method for producing liquid calcium chloride |
| 01/29/1992 | CN1058199A Producing method for high-pruity barium carbonate |
| 01/29/1992 | CN1058198A Method for producing highly active calcium oxide |
| 01/28/1992 | WO1992002457A1 Precipitated calcium carbonate |
| 01/28/1992 | US5084257 Sulfur dioxide removal from stack gas |
| 01/28/1992 | US5084255 Purification of flue gas by adding calcium sulfate and magnesi um compounds also adding calcium oxide and recovering gypsum |
| 01/28/1992 | US5084254 Natural calcium carbonate ores |
| 01/25/1992 | WO1992001627A1 High surface area hydrated lime and methods |
| 01/22/1992 | EP0467165A1 Solids suspensions stable against sedimentation and process for their preparation |
| 01/22/1992 | CN1058005A Process for preparing high-purity technical calcium carbonate from calcium carbide dregs |
| 01/22/1992 | CN1058004A Process for preparing high-purity calcium oxide from calcium carbide dregs |
| 01/21/1992 | US5082644 From calcium carbide and water |
| 01/09/1992 | WO1992000347A1 Method and dispersants for production of high solids aqueous calcium carbonate suspensions |
| 01/09/1992 | WO1992000252A1 Fluidized calcining process |
| 01/09/1992 | CA2086231A1 Method and dispersants for production of high solids aqueous calcium carbonate suspensions |
| 01/08/1992 | CN1057629A Process for producing strontium carbonate |
| 01/01/1992 | CN1015252B Desulfurization of gypsum |
| 12/27/1991 | EP0462781A2 Method for desulphurizing exhaust smoke |
| 12/25/1991 | CN1057243A Preparation process for octahydrated barium hydroxide |
| 12/25/1991 | CN1015165B Process for producing barium sulfate having chemically reactive surface |
| 12/24/1991 | US5075093 Calcium carbonate in a platelet-like particulate form and a method for the preparation thereof |
| 12/04/1991 | EP0459552A1 Electroconductive barium sulphate and process for manufacturing the same |
| 12/04/1991 | EP0459399A1 Monodisperse vaterite type calcium carbonate, its manufacturing method and method of controlling growth of particles and shape thereof |
| 12/04/1991 | EP0459348A1 Treatment of residues obtained during barium or strontium sulphide extraction |
| 12/04/1991 | EP0459317A1 A polyester composition containing vaterite-type calcium carbonate |
| 12/04/1991 | CN1056672A Making method of active lime powder agent for injection metallurgy |
| 11/30/1991 | CA2042430A1 Water treatment blend in solid form |
| 11/27/1991 | CN1056474A Productive method of high-activity and-urity calcium hydroxide |
| 11/27/1991 | CN1056442A Industrial production method of granular barium carbonate and granulator thereof |
| 11/27/1991 | CA2043171A1 Electrically conductive barium sulfate and process of producing it |
| 11/15/1991 | WO1991018131A1 Process to produce hydrogen and/or hemihydrate calcium sulphate from calcium sulphite |
| 11/15/1991 | CA2082957A1 Process to produce hydrogen and/or hemihydrate calcium sulphate from calcium sulphite |
| 11/14/1991 | DE4014908A1 REgulating purity of gypsum recovered from off-gas of power station - by purifying recovered from the hydrocyclone plant prior to recycling to absorption circuit |
| 11/13/1991 | EP0456413A2 Calcium carbonate pigment for heat-sensitive recording paper, process for preparing same, coating composition for heat-sensitive recording paper and heat-sensitive recording paper |
| 11/13/1991 | CN1014696B Process for producing strontium carbonate |
| 11/12/1991 | US5064718 Precipitation in dipersant copolymer of acrylated polyether and acrylate monomer |
| 10/30/1991 | CN1055718A Productive method for magnesium oxide and calcium carbonate |
| 10/29/1991 | US5061467 Economic recovery and utilization of boiler flue gas pollutants |