| Patents for C01F 11 - Compounds of calcium, strontium, or barium (8,019) |
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| 01/26/1982 | US4312839 Process for controlling calcium in a leach operation |
| 01/26/1982 | CA1116830A1 Method and apparatus for the thermal treatment of fine-grained material with hot gases |
| 01/20/1982 | EP0044120A2 Process for the preparation of phosphoric acid and calcium sulphate anhydrite |
| 01/20/1982 | EP0044005A1 Production of calcium-sulfate hemihydrate using waste heat, diluted sulfuric acid and sulfuric salts |
| 01/19/1982 | US4311570 Chemical process on the surface of a rotating body |
| 01/05/1982 | US4309398 Reduction with hydrogen or carbon monoxide in presence of metal oxide, carbonation of soluble products |
| 01/05/1982 | CA1115487A1 Fibrous calcium sulfate |
| 01/05/1982 | CA1115483A1 Preparation of monocalcium phosphate and phosphoric acid |
| 12/29/1981 | US4308246 Fixation of nitrogen using silicon oxide catalysts |
| 12/29/1981 | CA1115025A1 Process for producing calcium sulfate |
| 12/16/1981 | EP0041761A1 Process for recovering calcium compounds and sulphur dioxide from calcium sulphate, and calcium compounds and sulphur dioxide obtained according to this process |
| 12/16/1981 | EP0041758A1 Process for the reduction of radioactivity of calcium sulphate produced from phosphorite |
| 12/16/1981 | EP0041614A1 Barium sulphate powder coated with organic material |
| 12/15/1981 | CA1114133A1 Process for producing aqueous solution of calcium nitrite |
| 12/01/1981 | CA1113224A1 Process for the preparation of lead chloride from lead salts, sulphate or carbonate, containing foreign metals |
| 11/17/1981 | US4301130 Method of washing waste phosphogypsum |
| 11/17/1981 | US4301127 Flue gas scrubbing system |
| 11/17/1981 | CA1112421A1 Process for producing calcium fluoborate |
| 11/10/1981 | US4299809 Process for the manufacture of calcium chloride |
| 11/10/1981 | CA1112021A1 Inorganic fibers |
| 11/04/1981 | EP0039324A1 Method of processing hydrosilicofluoric acid produced during the wet decomposition of phosphates, and arrangement for carrying out this method |
| 10/29/1981 | WO1981003016A1 Process and equipment for the performance of precipitate forming reactions by using an ion-exchange auxiliary phase |
| 10/20/1981 | US4296089 Inorganic fibers |
| 10/13/1981 | US4294807 System for removing solids from a used lime or limestone slurry scrubbing liquor in flue gas desulfurization |
| 10/06/1981 | US4293097 Method for brightening natural calcitic ores |
| 09/01/1981 | US4286995 Mica-free joint compound |
| 09/01/1981 | US4286994 Method for the use of the gypsum occurring in flue gas desulfurizing installations, operated on a lime basis |
| 08/25/1981 | CA1107676A1 Amalgam electrolysis of crude salt containing calcium and sulphate including precipitation of glauberite |
| 08/04/1981 | US4282192 Process for producing a calcium sulfate product containing low amounts of radium |
| 08/04/1981 | CA1106184A1 Benefication method for iron which residues from electrolytic treatment of zinc |
| 07/14/1981 | US4278208 Suspending calcium carbonate |
| 07/07/1981 | USRE30668 Impregnation of alumina with silicon compound followed by controlled oxidation |
| 07/07/1981 | US4277447 Process for reducing calcium ion concentrations in alkaline alkali metal chloride brines |
| 06/30/1981 | CA1103889A1 Process for the manufacture of lump calcium sulfate |
| 06/23/1981 | CA1103642A1 Comminution of materials |
| 06/09/1981 | US4272498 Process for comminuting and activating limestone by reaction with CO2 |
| 06/02/1981 | US4271137 Reaction with oxygen to form nitrogen oxides, producing nitrates therefrom with solid metal oxide |
| 06/02/1981 | US4270954 Inorganic fibers |
| 05/13/1981 | EP0028543A1 Process for simultaneous production of hydrated hydrazine and crystalline gypsum and method of separating hydrazine from a mixture of hydrated hydrazine and crystalline gypsum |
| 05/12/1981 | US4267157 Process of preparing metal phosphorus trisulfides |
| 05/12/1981 | US4267156 By conflowing the lime slurry and a sodium bisulfite through a mixing nozzle |
| 05/06/1981 | EP0027997A1 Mineral filler, particularly calcium carbonate for paints and paper coatings |
| 04/28/1981 | US4264563 Added to a suspension of lime, heated to boiling to form a calcium fluosilicate compound |
| 04/28/1981 | US4264543 Process for manufacturing synthetic gypsum absorbent granules |
| 04/28/1981 | CA1100122A1 Removal of noxious contaminants from gas |
| 04/21/1981 | US4263043 Desulfurizing agent for injection |
| 04/21/1981 | CA1099483A1 Process of making calcium sulfate from aqueous sulfuric acid containing ferrous sulfate |
| 04/14/1981 | US4261962 Concurrent fluid flow through bifurcated nozzle |
| 03/24/1981 | CA1098136A1 Gypsum products |
| 03/18/1981 | EP0025237A1 Method for producing strontium nitrate |
| 03/17/1981 | CA1097476A1 Treatment of gypsum plaster |
| 03/17/1981 | CA1097475A1 Treatment of gypsum plaster |
| 03/10/1981 | US4255398 Novel ettringite whiskers, production and uses |
| 03/10/1981 | CA1097029A1 Recovery of strontium from strontium calcium loaded brine |
| 03/03/1981 | CA1096584A1 Process for recovery of nitric acid from waste nitric acid and/or nitrate |
| 02/25/1981 | EP0024221A1 Marine anchor, especially for large tonnage ships |
| 02/24/1981 | CA1096174A1 Explosive composition and process for its manufacture |
| 02/24/1981 | CA1096113A1 Fluidized bed recovery of sodium carbonate from spent cooking liquor |
| 02/17/1981 | US4251351 Processing of calcium carbonate minerals |
| 02/03/1981 | US4248850 From basic metal compound and bromine, formaldehyde reducing agent |
| 01/28/1981 | EP0022785A1 A method of recovering calcium and sulphur compounds from a metallurgical waste material. |
| 01/27/1981 | US4247525 Method of and apparatus for removing sulfur oxides from exhaust gases formed by combustion |
| 01/22/1981 | WO1981000100A1 Process for the preparation of an agent for neutralizing acidic components of flue gas,such an agent and the use thereof |
| 01/14/1981 | EP0022367A2 Process for the preparation of an agent for neutralizing acidic components of flue gas |
| 01/13/1981 | US4244933 Calcium carbonate particles and processes for preparing same |
| 01/07/1981 | EP0021474A1 Process for preparing calcium sulphate hemihydrate, and hemihydrate so obtained |
| 01/06/1981 | CA1093228A1 Preparation of clear, dilute lime solution by ion exchange |
| 12/30/1980 | US4242318 Process for the preparation of aqueous suspensions containing at least 65% by weight of calcium carbonate |
| 12/23/1980 | CA1091898A1 Method for removing sulfur dioxide from exhaust gas |
| 12/16/1980 | US4239736 Bleaching iron impurity |
| 12/16/1980 | CA1091632A1 Processing of calcium carbonate minerals |
| 12/09/1980 | US4238459 Chemical beneficiation of phosphatic limestone and phosphate rock with α-hydroxysulfonic acids |
| 11/18/1980 | US4234556 Method of producing calcium bromide |
| 11/18/1980 | US4234398 Electrolytic oxidation |
| 11/11/1980 | CA1089189A1 Disposal of the residue of the exhaust gas washers of furnaces in particular bituminous coal power stations |
| 11/04/1980 | US4231995 Ammonia double-alkali process for removing sulfur oxides from stack gases |
| 10/07/1980 | US4226839 Roasting calcium carbonate in carbon dioxide atmosphere |
| 09/30/1980 | US4225572 Catalytic iron oxide for lime regeneration in carbonaceous fuel combustion |
| 09/23/1980 | US4224120 Electrolytic method and apparatus for producing magnesium from a salt solution containing magnesium sulphate |
| 09/23/1980 | US4224078 Treatment of gypsum plaster |
| 09/17/1980 | EP0015333A1 Converting calcium sulphide to calcium oxide |
| 09/16/1980 | US4222993 Removal of noxious contaminants from gas |
| 09/16/1980 | US4222990 Multistage, multizonal |
| 09/02/1980 | CA1084957A1 Plaster made from ferrous sulphate |
| 08/26/1980 | US4219590 Uniformity of particle size |
| 08/26/1980 | CA1084236A1 Method of obtaining granulated and defluorated phosphogypsum |
| 08/19/1980 | CA1083778A1 Apparatus and process for preparing calcined gypsum |
| 08/06/1980 | EP0014189A1 Process for the working up of ferrous II sulphate heptahydrate |
| 08/06/1980 | EP0014169A1 Process and apparatus for the production of calcium chloride |
| 08/06/1980 | EP0013986A1 Process for the removal of ammonia from ammonia containing solutions, especially coke oven waters |
| 08/05/1980 | US4216197 Regeneration of calcium oxide used to desulfurize fuel oils |
| 07/22/1980 | US4213946 Process for preventing formation of gypsum scale in a flue gas desulfurization process |
| 07/15/1980 | US4212851 Regeneration of sulfided dolomite |
| 07/01/1980 | US4210626 Manufacture of magnesium carbonate and calcium sulphate from brine mud |
| 06/25/1980 | EP0012488A1 Process for the preparation of calcium sulphate hemihydrate and calcium sulphate hemihydrate obtained by this process |
| 06/25/1980 | EP0012487A1 Process for the preparation of calcium sulphate anhydrite and calcium sulphate anhydrite obtained by this process |
| 06/17/1980 | US4208393 Adding calcium carbonate to sulfuric acid-ferrous sulfate mixture |
| 06/17/1980 | US4208391 Process for producing aqueous solution of calcium nitrite |
| 06/17/1980 | US4208388 Flow aid |
| 05/27/1980 | US4205054 Process for recovery of nitric acid from nitrates |