| Patents for C01F 11 - Compounds of calcium, strontium, or barium (8,019) |
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| 09/25/1990 | CA1274441A1 Hydrated calcium hypochlorite tablets containing lime compounds as lubricants and solubility retardants |
| 09/18/1990 | US4957716 Method for removal of SO2 and NOx from combustion gases by metal chelation and thermal reduction |
| 09/17/1990 | WO1990011256A1 Process and apparatus for producing calcium sulfate microfibers |
| 09/17/1990 | CA2024146A1 Process and apparatus for producing calcium sulfate microfibers |
| 09/12/1990 | EP0386868A1 Low-density calcium carbonate agglomerate |
| 09/11/1990 | US4956157 Process for separating salts in seawater |
| 09/11/1990 | US4955586 Apparatus for treating slurry by gas-liquid contact method |
| 08/28/1990 | US4952379 Method for purifying calcium nitrate melt/solution which is separated from the mixture obtained by the solution of rock phosphate with nitric acid |
| 08/22/1990 | CN1044798A Joint production of strontium and alkali |
| 08/07/1990 | US4946658 Addition of pyritic materials to feed mix for desulfurization of phosphogypsum |
| 08/01/1990 | EP0380430A1 Process for grinding calcium carbonate in an aqueous medium |
| 08/01/1990 | EP0379876A1 Process for the separation of barium from aqueous strontium salt solutions |
| 07/25/1990 | EP0378837A1 Preparation of calcium sulfate dihydrate having an elongated crystalline structure |
| 07/24/1990 | US4943375 Crown and crypt compounds bound to silica; chromatography; metal recovery; blood, photographic films and waste demetallization |
| 07/05/1990 | DE3844217A1 Process for preparing calcium hydroxides |
| 07/04/1990 | EP0376550A2 Stabilized solid thiocarbonate compositions and methods for making same |
| 07/04/1990 | CN1043483A Process for barium carbonate |
| 07/04/1990 | CN1043482A Process for producing strontium carbonate |
| 06/28/1990 | CA2005873A1 Stabilized solid thiocarbonate compositions and methods for making same |
| 06/26/1990 | US4937219 Oxidation or reduction catalyst, inflammable gas sensor |
| 06/19/1990 | US4935211 Fluorogypsum waste solidification material |
| 06/13/1990 | CN1042886A Production technology of strontium carbonate |
| 06/13/1990 | CN1008355B Process for producing strontium carbonate by calcination |
| 06/07/1990 | DE3840039A1 Process for preparing chemically reactive barium sulphate of specific morphology |
| 06/06/1990 | EP0371530A1 Process for manufacturing barium sulphate with a variable morphology |
| 05/23/1990 | EP0368919A1 Method for the multistage, waste-free processing of red mud to recover basic materials of chemical industry |
| 05/22/1990 | US4927618 Introducing carbon dioxide into an aqueous calcium hydroxide slurry containing an anionic organopolyphosphonate polyelectrolyte |
| 05/22/1990 | US4927463 Aqueous dispersion of gypsum and its use as a filler and coating pigment in the production of paper and cardboard |
| 05/22/1990 | CA1269223A1 Spherically shaped precipitated calcium carbonate, its preparation and use |
| 05/16/1990 | CN1007963B Installation for wet-removal of sulphur from flue gas |
| 05/02/1990 | EP0366569A2 Compatibility agent for aqueous polypigmentary suspensions, one of the pigments being hydrated calcium sulfate |
| 05/02/1990 | EP0366182A1 Method for the disposal of a residue containing sodium sulfate |
| 04/18/1990 | CN1041334A Roasting method for preparing strontium oxide in production of strontium salt |
| 04/17/1990 | US4918035 Process for the preparation of complex perovskite type compounds |
| 04/17/1990 | CA1267772A1 Manufacturing process of spherical particles from group ii metal compounds |
| 04/10/1990 | US4915705 Hydrolysis with aqueous ammonia |
| 04/03/1990 | CA1267367A1 Procedure for filtering lime sludge meant to be regenerated to lime |
| 03/27/1990 | US4912078 Mixing magnesium and aluminum hydroxide; autoclaving; compression; sintering |
| 03/27/1990 | CA1266959A1 Treatment of solids containing calcium salt of sulfuric oxyacid and method of purifying exhaust gas utilizing same |
| 03/21/1990 | EP0359385A1 Dry ground/wet ground calcium carbonate filler compositions |
| 03/21/1990 | CN1040572A Manufacturing method for ceramics and products thereof |
| 03/21/1990 | CN1007237B Continuous process for preparing phosphoric acid and calcium sulphate |
| 03/20/1990 | US4910002 Cyclic process for the removal of NOx and SOx from gas streams using a water-soluble, polymeric chelate of a polyvalent metal and membrane separation means |
| 02/28/1990 | EP0356406A1 Process for preparaton of an acid resistent coating on filler particles |
| 02/14/1990 | EP0354609A1 Process for the preparation of ultra-fine barium sulfate |
| 02/13/1990 | US4900533 Alkaline earth metal carbonates |
| 02/06/1990 | CA1265535A1 Removal of impurities from amines |
| 01/31/1990 | CN1006602B Process for desulfurization of flue gases |
| 01/16/1990 | US4894217 Process for causticizing of an aqueous solution containing alkali carbonate |
| 01/16/1990 | US4894093 Precipitation, pigments |
| 01/16/1990 | CA1264408A1 Continuous process for preparing phosphoric acid and calcium sulphate |
| 01/02/1990 | US4891194 Method for scrubbing flue gases from a firing unit |
| 12/27/1989 | CN1006222B Recovery of calcium chloride from waste liquid of |
| 12/26/1989 | US4889665 Process for producing ultrafine particles of ceramics |
| 12/20/1989 | CN1038071A Method for preparation of fiber calcium sulfate from waste liquor of ammonia soda plant and brine |
| 12/19/1989 | US4888308 Glass manufacture using dense, unsintered, granular alkaline earth metal carbonates |
| 12/19/1989 | US4888161 Method of forming dense, unsintered, granular alkaline earth metal carbonates |
| 12/19/1989 | US4888160 Process for producing calcium carbonate and products thereof |
| 12/19/1989 | US4888158 Separating unevaporated drops from hot flue gas stream using modified electrostatic precipitator; removal of sulfur oxides and particles; pollution control |
| 12/19/1989 | CA1263908A1 Method of removing sulphur dioxide from a gaseous stream |
| 12/07/1989 | DE3830390C1 Regenerative SO2 flue gas purification |
| 11/23/1989 | EP0342272A1 Process for the treatment of alpha-calciumsulphate-hemihydrate |
| 11/22/1989 | CN1037319A Comprehensive utilization method of trona |
| 11/16/1989 | WO1989010905A1 Process for preparing calcium sulphate alpha hemihydrate |
| 11/16/1989 | DE3815683A1 Method of drying alpha -hemihydrate |
| 11/02/1989 | EP0339310A1 Aqueous gypsum dispersion and its use as a filler and coating pigment in the production of paper and cardboard |
| 10/25/1989 | EP0338967A1 Apparatus for treating slurry by gas-liquid contact method |
| 10/24/1989 | US4876076 Limestone absorber forming calcium sulfite, oxidation to sulfate; air pollution control |
| 10/17/1989 | US4874591 Process for the purification of waste gases containing hydrochloric acid and sulphur dioxide |
| 10/17/1989 | US4874585 Economic recovery and utilization of boiler flue gas pollutants |
| 10/05/1989 | WO1989009187A1 Process for preparing calcium sulphate with an elongated crystalline structure, the length and shape factor of which are controlled |
| 10/04/1989 | EP0335159A1 Thermoplastic moulding compositions |
| 10/04/1989 | CN1035995A Method for making of strontium carbonate using ammonium chloride |
| 10/03/1989 | US4871519 Method of making magnesium oxide and hydrates thereof |
| 09/28/1989 | DE3834679C1 Process for the desulphurisation of flue gases of power station boiler furnaces |
| 09/27/1989 | EP0334292A1 Process for the preparation of calcium sulfate dihydrate with elongated shaped crystals provided with an imposed length and shape factor |
| 09/26/1989 | CA1261589A1 Predetermined and enhanced densification in sintered metal oxides |
| 09/21/1989 | WO1989008498A1 Economic recovery and utilization of boiler flue gas pollutants |
| 09/21/1989 | DE3843285A1 Verfahren zur schadlosen entsorgung toxischer haertereialtsalze Procedures for the safe disposal of toxic haertereialtsalze |
| 09/19/1989 | US4867961 Absorption by magnesium oxide slurry, reaction with sulfuric acid |
| 09/13/1989 | EP0331704A1 Calcination of calcium carbonate and blends thereof |
| 09/05/1989 | CA1258961A1 PROCESS FOR PRODUCING .alpha.-FORM GYPSUM HEMIHYDRATE |
| 08/30/1989 | CN1035097A Production of calcium oxide of high activity from calcium carbide residue |
| 08/29/1989 | US4861572 Process for manufacture of metal oxide |
| 08/29/1989 | US4861568 Calcium hydroxide, sugar |
| 08/24/1989 | WO1989007576A1 Process and apparatus for desulfurization |
| 08/23/1989 | EP0328712A1 Process of producing plate-shaped calcium carbonate particles |
| 08/17/1989 | DE3803631A1 Method for controlling the crystal growth, the filterability and the dewaterability of flue gas gypsum |
| 08/16/1989 | EP0327902A1 Process for the production of dry highly disperse calcium hydroxide |
| 08/15/1989 | US4857291 Process of producing plate-shaped calcium carbonate particles |
| 08/03/1989 | DE3801382A1 Process and plant for converting sodium sulphate into sodium hydroxide |
| 08/02/1989 | CN1034350A New technology for producing barium hyaroxide monohydrate via dehydration of barium hydroxide octahydrate |
| 07/26/1989 | EP0324845A1 Process for desulphurating flue gases from power station boiler furnaces |
| 07/25/1989 | US4851208 Precipitation by addition of partly miscible mixture to solution of group ii compounds |
| 07/13/1989 | WO1989006223A1 Use of calcium sulphate to improve the fermentation of organic fertilizers |
| 07/12/1989 | EP0323697A1 Process for preparing finely divided calcium carbonate and its use as a filler in polymeric compositions |
| 07/11/1989 | US4847086 Calcium lactate, calcium tartrate |
| 07/05/1989 | EP0322831A1 Use of calcium sulphate to improve the fermentation of organic wastes |
| 06/27/1989 | US4842842 Process for producing α-form gypsum hemihydrate |
| 06/27/1989 | US4842833 Method for separating barium from water-soluble strontium compounds |