Patents for C01F 11 - Compounds of calcium, strontium, or barium (8,019)
09/1990
09/25/1990CA1274441A1 Hydrated calcium hypochlorite tablets containing lime compounds as lubricants and solubility retardants
09/18/1990US4957716 Method for removal of SO2 and NOx from combustion gases by metal chelation and thermal reduction
09/17/1990WO1990011256A1 Process and apparatus for producing calcium sulfate microfibers
09/17/1990CA2024146A1 Process and apparatus for producing calcium sulfate microfibers
09/12/1990EP0386868A1 Low-density calcium carbonate agglomerate
09/11/1990US4956157 Process for separating salts in seawater
09/11/1990US4955586 Apparatus for treating slurry by gas-liquid contact method
08/1990
08/28/1990US4952379 Method for purifying calcium nitrate melt/solution which is separated from the mixture obtained by the solution of rock phosphate with nitric acid
08/22/1990CN1044798A Joint production of strontium and alkali
08/07/1990US4946658 Addition of pyritic materials to feed mix for desulfurization of phosphogypsum
08/01/1990EP0380430A1 Process for grinding calcium carbonate in an aqueous medium
08/01/1990EP0379876A1 Process for the separation of barium from aqueous strontium salt solutions
07/1990
07/25/1990EP0378837A1 Preparation of calcium sulfate dihydrate having an elongated crystalline structure
07/24/1990US4943375 Crown and crypt compounds bound to silica; chromatography; metal recovery; blood, photographic films and waste demetallization
07/05/1990DE3844217A1 Process for preparing calcium hydroxides
07/04/1990EP0376550A2 Stabilized solid thiocarbonate compositions and methods for making same
07/04/1990CN1043483A Process for barium carbonate
07/04/1990CN1043482A Process for producing strontium carbonate
06/1990
06/28/1990CA2005873A1 Stabilized solid thiocarbonate compositions and methods for making same
06/26/1990US4937219 Oxidation or reduction catalyst, inflammable gas sensor
06/19/1990US4935211 Fluorogypsum waste solidification material
06/13/1990CN1042886A Production technology of strontium carbonate
06/13/1990CN1008355B Process for producing strontium carbonate by calcination
06/07/1990DE3840039A1 Process for preparing chemically reactive barium sulphate of specific morphology
06/06/1990EP0371530A1 Process for manufacturing barium sulphate with a variable morphology
05/1990
05/23/1990EP0368919A1 Method for the multistage, waste-free processing of red mud to recover basic materials of chemical industry
05/22/1990US4927618 Introducing carbon dioxide into an aqueous calcium hydroxide slurry containing an anionic organopolyphosphonate polyelectrolyte
05/22/1990US4927463 Aqueous dispersion of gypsum and its use as a filler and coating pigment in the production of paper and cardboard
05/22/1990CA1269223A1 Spherically shaped precipitated calcium carbonate, its preparation and use
05/16/1990CN1007963B Installation for wet-removal of sulphur from flue gas
05/02/1990EP0366569A2 Compatibility agent for aqueous polypigmentary suspensions, one of the pigments being hydrated calcium sulfate
05/02/1990EP0366182A1 Method for the disposal of a residue containing sodium sulfate
04/1990
04/18/1990CN1041334A Roasting method for preparing strontium oxide in production of strontium salt
04/17/1990US4918035 Process for the preparation of complex perovskite type compounds
04/17/1990CA1267772A1 Manufacturing process of spherical particles from group ii metal compounds
04/10/1990US4915705 Hydrolysis with aqueous ammonia
04/03/1990CA1267367A1 Procedure for filtering lime sludge meant to be regenerated to lime
03/1990
03/27/1990US4912078 Mixing magnesium and aluminum hydroxide; autoclaving; compression; sintering
03/27/1990CA1266959A1 Treatment of solids containing calcium salt of sulfuric oxyacid and method of purifying exhaust gas utilizing same
03/21/1990EP0359385A1 Dry ground/wet ground calcium carbonate filler compositions
03/21/1990CN1040572A Manufacturing method for ceramics and products thereof
03/21/1990CN1007237B Continuous process for preparing phosphoric acid and calcium sulphate
03/20/1990US4910002 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
02/1990
02/28/1990EP0356406A1 Process for preparaton of an acid resistent coating on filler particles
02/14/1990EP0354609A1 Process for the preparation of ultra-fine barium sulfate
02/13/1990US4900533 Alkaline earth metal carbonates
02/06/1990CA1265535A1 Removal of impurities from amines
01/1990
01/31/1990CN1006602B Process for desulfurization of flue gases
01/16/1990US4894217 Process for causticizing of an aqueous solution containing alkali carbonate
01/16/1990US4894093 Precipitation, pigments
01/16/1990CA1264408A1 Continuous process for preparing phosphoric acid and calcium sulphate
01/02/1990US4891194 Method for scrubbing flue gases from a firing unit
12/1989
12/27/1989CN1006222B Recovery of calcium chloride from waste liquid of
12/26/1989US4889665 Process for producing ultrafine particles of ceramics
12/20/1989CN1038071A Method for preparation of fiber calcium sulfate from waste liquor of ammonia soda plant and brine
12/19/1989US4888308 Glass manufacture using dense, unsintered, granular alkaline earth metal carbonates
12/19/1989US4888161 Method of forming dense, unsintered, granular alkaline earth metal carbonates
12/19/1989US4888160 Process for producing calcium carbonate and products thereof
12/19/1989US4888158 Separating unevaporated drops from hot flue gas stream using modified electrostatic precipitator; removal of sulfur oxides and particles; pollution control
12/19/1989CA1263908A1 Method of removing sulphur dioxide from a gaseous stream
12/07/1989DE3830390C1 Regenerative SO2 flue gas purification
11/1989
11/23/1989EP0342272A1 Process for the treatment of alpha-calciumsulphate-hemihydrate
11/22/1989CN1037319A Comprehensive utilization method of trona
11/16/1989WO1989010905A1 Process for preparing calcium sulphate alpha hemihydrate
11/16/1989DE3815683A1 Method of drying alpha -hemihydrate
11/02/1989EP0339310A1 Aqueous gypsum dispersion and its use as a filler and coating pigment in the production of paper and cardboard
10/1989
10/25/1989EP0338967A1 Apparatus for treating slurry by gas-liquid contact method
10/24/1989US4876076 Limestone absorber forming calcium sulfite, oxidation to sulfate; air pollution control
10/17/1989US4874591 Process for the purification of waste gases containing hydrochloric acid and sulphur dioxide
10/17/1989US4874585 Economic recovery and utilization of boiler flue gas pollutants
10/05/1989WO1989009187A1 Process for preparing calcium sulphate with an elongated crystalline structure, the length and shape factor of which are controlled
10/04/1989EP0335159A1 Thermoplastic moulding compositions
10/04/1989CN1035995A Method for making of strontium carbonate using ammonium chloride
10/03/1989US4871519 Method of making magnesium oxide and hydrates thereof
09/1989
09/28/1989DE3834679C1 Process for the desulphurisation of flue gases of power station boiler furnaces
09/27/1989EP0334292A1 Process for the preparation of calcium sulfate dihydrate with elongated shaped crystals provided with an imposed length and shape factor
09/26/1989CA1261589A1 Predetermined and enhanced densification in sintered metal oxides
09/21/1989WO1989008498A1 Economic recovery and utilization of boiler flue gas pollutants
09/21/1989DE3843285A1 Verfahren zur schadlosen entsorgung toxischer haertereialtsalze Procedures for the safe disposal of toxic haertereialtsalze
09/19/1989US4867961 Absorption by magnesium oxide slurry, reaction with sulfuric acid
09/13/1989EP0331704A1 Calcination of calcium carbonate and blends thereof
09/05/1989CA1258961A1 PROCESS FOR PRODUCING .alpha.-FORM GYPSUM HEMIHYDRATE
08/1989
08/30/1989CN1035097A Production of calcium oxide of high activity from calcium carbide residue
08/29/1989US4861572 Process for manufacture of metal oxide
08/29/1989US4861568 Calcium hydroxide, sugar
08/24/1989WO1989007576A1 Process and apparatus for desulfurization
08/23/1989EP0328712A1 Process of producing plate-shaped calcium carbonate particles
08/17/1989DE3803631A1 Method for controlling the crystal growth, the filterability and the dewaterability of flue gas gypsum
08/16/1989EP0327902A1 Process for the production of dry highly disperse calcium hydroxide
08/15/1989US4857291 Process of producing plate-shaped calcium carbonate particles
08/03/1989DE3801382A1 Process and plant for converting sodium sulphate into sodium hydroxide
08/02/1989CN1034350A New technology for producing barium hyaroxide monohydrate via dehydration of barium hydroxide octahydrate
07/1989
07/26/1989EP0324845A1 Process for desulphurating flue gases from power station boiler furnaces
07/25/1989US4851208 Precipitation by addition of partly miscible mixture to solution of group ii compounds
07/13/1989WO1989006223A1 Use of calcium sulphate to improve the fermentation of organic fertilizers
07/12/1989EP0323697A1 Process for preparing finely divided calcium carbonate and its use as a filler in polymeric compositions
07/11/1989US4847086 Calcium lactate, calcium tartrate
07/05/1989EP0322831A1 Use of calcium sulphate to improve the fermentation of organic wastes
06/1989
06/27/1989US4842842 Process for producing α-form gypsum hemihydrate
06/27/1989US4842833 Method for separating barium from water-soluble strontium compounds
1 ... 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81