| Patents for C01F 11 - Compounds of calcium, strontium, or barium (8,019) |
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| 02/27/2001 | US6193945 Preparing aqueous suspension of waste material containing calcium compounds; lowering ph by mixing with acid; raising ph to precipitate non-calcium compounds; separating solidp phase; carbonizing liquid to precipitate calcium carbonate |
| 02/27/2001 | US6193944 Digesting spent potliner material in acid digester to produce a gas and hydrogen cyanide gas and water; removing gas; heating recovered silicon tetrafluoride gas to form fumed silica and hydrogen fluoride; recovering fumed silica |
| 02/22/2001 | WO2001012544A1 Production of fumed silica |
| 02/22/2001 | DE19939353A1 Fluoride mixtures, used in production of highly pure metal, in silver solder or as catalyst in organic reactions or for fluorinating organic compounds, contain alkali(ne earth) fluoride and small amount of silica |
| 02/22/2001 | DE19926216A1 Verfahren zur Herstellung von Bariumsulfat, Bariumsulfat und Verwendung des Bariumsulfats A process for preparing barium sulfate, barium sulfate, and use of the barium sulfate |
| 02/22/2001 | CA2381389A1 Production of fumed silica |
| 02/21/2001 | EP1077199A2 Calcium hydroxide and process for the production thereof |
| 02/20/2001 | US6190636 Reacting alkali-metal sulfate with alkaline earth metal chloride; treating alkaline earth metal sulfate with ammonia/carbon dioxide or ammonium carbonate and ammonium bicarbonate to form alkaline earth metal carbonate |
| 02/20/2001 | US6190633 Process for preparing calcium carbonate |
| 02/13/2001 | US6187277 Removing sulfur dioxide from gas by contacting gas with acidic aqueous solution of dimethyl sulfoxide to dissolve sulfur dioxide, reacting with alkaline earth metal ions to form solid alkaline earth sulfate and/or sulfite |
| 02/13/2001 | US6187275 Digesting spent potliner using acid to form gaseous hydrogen fluoride which is converted to hydrofluoric acid and reacted with alumina trihydrate to form aluminum trifluoride |
| 02/13/2001 | CA2004490C Process for grinding calcium carbonate in an aqueous medium |
| 02/01/2001 | WO2001007370A1 Removal of sulphates from a feedstock |
| 02/01/2001 | WO2001007365A1 High speed manufacturing process for precipitated calcium carbonate employing sequential pressure carbonation |
| 01/31/2001 | EP1073089A1 Mn2+ activated green emitting SrAl12O19 luminescent material |
| 01/25/2001 | WO2001005706A1 Method of producing surgical grade calcium sulphate |
| 01/23/2001 | CA2228586C Method for producing calcium chloride scales and a use of the method |
| 01/18/2001 | WO2001004218A1 Precipitated calcium carbonate product having improved brightness and method of preparing the same |
| 01/11/2001 | WO2001002298A1 Electrolytic purification of calcium carbonate |
| 01/11/2001 | CA2373081A1 Electrolytic purification of calcium carbonate |
| 01/10/2001 | EP1066818A1 Inorganic composite powder and cosmetic comprising the same |
| 01/03/2001 | EP1064227A1 METHOD FOR REPROCESSING WASTE ACID RESULTING FROM TiO 2? PRODUCTION |
| 01/03/2001 | EP1064225A1 Process for preparing and modifying synthetic calcium carbonate |
| 01/03/2001 | EP1064224A1 Synthesis method for powder ceramic complexes of refractory metals |
| 01/03/2001 | EP1064223A1 METHOD FOR REPROCESSING WASTE ACID RESULTING FROM TiO 2? PRODUCTION |
| 01/03/2001 | CN1278781A Process and apparatus for preparing preoiptated calcium carbonate |
| 12/27/2000 | CN1278234A Method for prepn. of calcium carbonate particles |
| 12/21/2000 | WO2000076919A1 Method for producing barium sulfate, barium sulfate and the utilization thereof |
| 12/21/2000 | CA2374726A1 Method for producing barium sulfate, barium sulfate and the utilization thereof |
| 12/20/2000 | CN1059641C Process for producing gypsum, sodium chloride and magnesium chloride from calcium-containing waste liquid and high- and low-temp. salt |
| 12/19/2000 | CA2196124C Process for preparing colloidal calcium carbonate by particle size |
| 12/12/2000 | US6159442 Pressurization; forming solid phase particles |
| 12/12/2000 | US6159436 Mixing hydrochloric acid; adding sodium carbonate to aqueous solution |
| 12/07/2000 | WO2000072685A1 Method for producing bactericide |
| 12/05/2000 | US6156286 With a coarse-grained aragonite precipitated calcium carbonate. |
| 11/30/2000 | WO2000048477A3 Acidic solution of sparingly-soluble group iia complexes |
| 11/22/2000 | CN1058685C Process for producing calcium carbonate particles having size of 0.1 to 1.0 micrometer |
| 11/22/2000 | CN1058684C Process for preparing colloidal calcium carbonate |
| 11/22/2000 | CN1058683C Process for producing ultrafine particles of colloidal calcium carbonate |
| 11/16/2000 | WO2000068496A1 Feeding device and process and feeding system which utilise the feeding device |
| 11/14/2000 | US6146607 Process for producing highly reactive lime in a furnace |
| 11/09/2000 | WO2000066982A1 Oxidative reactor for oxidation of salts |
| 11/09/2000 | WO2000066495A1 Method, apparatus and use of chelating agents for the purification of calcium sulphate |
| 11/09/2000 | WO2000039029A3 Production of concentrated carbonate suspensions |
| 11/09/2000 | CA2370247A1 Oxidative reactor for oxidation of salts |
| 11/07/2000 | US6143260 Method for removing magnesium from brine to yield lithium carbonate |
| 11/07/2000 | US6143065 Precipitated calcium carbonate product having improved brightness and method of preparing the same |
| 11/07/2000 | US6143064 Pigment particles such as kaolin, natural calcium carbonate or titanium dioxide and precipitated calcium carbonate are mixed in aqueous phase at ph 6-11, causing pigment particles to be coated with particles of precipitated calcium carbonate; paper |
| 11/02/2000 | WO2000064809A1 Method of recovering fumed silica from spent potliner |
| 11/02/2000 | CA2371248A1 Method of recovering fumed silica from spent potliner |
| 11/01/2000 | CN1057981C Process for preparation of superfine active calcium carbonate |
| 11/01/2000 | CN1057980C Method for purification of calcium carbonate |
| 10/31/2000 | US6140376 Dispersed aqueous suspensions |
| 10/26/2000 | WO2000063118A1 Method and apparatus for continuous gas liquid reactions |
| 10/25/2000 | CN1057712C Magnesium-enhanced sulfur dioxide scrubbing with gypsum formation |
| 10/24/2000 | US6136085 Silica-coated alkaline earth metal carbonate pigment |
| 10/19/2000 | WO2000061361A1 Surface treated barium sulfate and method of preparing the same |
| 10/19/2000 | CA2368021A1 Surface treated barium sulfate and method of preparing the same |
| 10/18/2000 | EP1044925A2 Process and apparatus for the production of high-purity magnesium hydroxide |
| 10/18/2000 | CN1270143A High purity magnesium hydrate and preparation thereof |
| 10/18/2000 | CN1057507C Preparation of high purity strontium carbonate |
| 10/17/2000 | US6132773 Precipitating active silica from aqueous alkali metal silicate solution, on support material other than silica to form slurry; separating silica slurry to form silica susepnsion; drying silica suspension |
| 10/17/2000 | US6132696 Reaction of carbon dioxide with calcium oxide |
| 10/12/2000 | WO2000059641A1 Device and method for micronizing powder and granular material |
| 10/11/2000 | CN1269326A Calcium carbonate drying technology |
| 10/05/2000 | WO2000058528A1 Method of treating spent potliner material from aluminum reduction cells |
| 10/05/2000 | WO2000058217A1 Process for the preparation of discrete particles of calcium carbonate |
| 10/04/2000 | EP1040087A1 Stabilized liquid lime dispersion for sewage treatment |
| 09/28/2000 | WO2000056661A1 Process for producing calcium carbonate |
| 09/27/2000 | CN1056820C Method for preparing F and anti-corrosion in producing process of supermicro barite powder |
| 09/26/2000 | US6123908 Method of treating spent potliner material from aluminum reduction cells |
| 09/26/2000 | US6123855 Use of non-ionic surfactants |
| 09/26/2000 | US6123764 Degassing calcium fluoride powder particles to desorb impurities from surfaces; preprocessing degassed calcium fluoride powder particles by fusing degassed calcium fluoride powder particles in crucible; refusing to grow single crystals |
| 09/20/2000 | CN1056591C Method for preparation of light calcium carbonate |
| 09/13/2000 | CN1266124A Method of making calcium carbonate for inner filling paper |
| 09/08/2000 | WO2000051941A1 A composition of matter comprising high brightness calcium carbonate pigments and processes for making same |
| 09/08/2000 | CA2364743A1 A composition of matter comprising high brightness calcium carbonate pigments and processes for making same |
| 09/06/2000 | CN1056166C Super-fine-ground calcium carbonate for paper-making and production method thereof |
| 08/29/2000 | US6110429 Transformation of halogenated refrigerant gases |
| 08/29/2000 | US6110379 Method for treating water containing sulfate |
| 08/24/2000 | WO2000048477A2 Acidic solution of sparingly-soluble group iia complexes |
| 08/24/2000 | CA2369067A1 Acidic solution of sparingly-soluble group iia complexes |
| 08/23/2000 | EP1028916A1 Method for making calcium carbonate |
| 08/23/2000 | CN1264351A Seeding of aragonite calcium carbonate and the product thereof |
| 08/16/2000 | EP1027287A1 Process for preparing calcium carbonate particles |
| 08/16/2000 | EP1027286A1 Process and apparatus for preparing precipitated calcium carbonate |
| 08/15/2000 | CA2150411C Process for the water-repellent impregnation of plaster |
| 08/10/2000 | WO2000046149A1 Procedure for preparing silica from calcium silicate |
| 08/09/2000 | EP1024883A1 Process for producing highly reactive lime in a furnace |
| 08/09/2000 | EP0909335B1 Treatment of fly ash/apc residues including lead salt recovery |
| 08/09/2000 | CN2390866Y Charging device of preheating device pipe in lime calcining system |
| 08/09/2000 | CN1262223A Process for preparing nm-class calcium carbonate by ultrasonic cavitation technique |
| 08/02/2000 | CN1261601A Process for producing potassium chloride from alkaline slag and potassium feldspar |
| 07/26/2000 | EP1022254A1 Method and installation for the recycling of a residue of flue gas cleaning |
| 07/25/2000 | US6093487 Polymer/CaCO3 composite core/sheath particulates and hollow . CaCO.sub3 microbeads prepared therefrom |
| 07/25/2000 | US6093423 Reduced absorption of fatty acids |
| 07/20/2000 | WO2000041967A1 Ammonia recovery |
| 07/20/2000 | WO2000029485A8 Organic polymer/fine inorganic particle aqueous dispersion with excellent dispersion stability and use thereof |
| 07/20/2000 | CA2359930A1 Ammonia recovery |
| 07/19/2000 | EP1019108A1 Macroporous composite for carrying one or more medicinal substances and for use as a bone reconstruction material, and method for making same |