| Patents for C01D 7 - Carbonates of sodium, potassium, or alkali metals in general (1,753) |
|---|
| 05/31/2000 | EP1004345A2 Acid component-removing agent, method for producing it and method for removing acid components |
| 05/31/2000 | EP0697011B1 Large potassium bicarbonate crystals and process for the preparation thereof |
| 05/31/2000 | CN1254683A Process for preparing low-salt heavy sodium carbonate |
| 04/20/2000 | WO2000021887A1 Method of formulating alkali metal salts |
| 04/20/2000 | WO2000021886A1 Method of ammonium sulfate purification |
| 04/13/2000 | CA2284969A1 Method of ammonium sulfate purification |
| 04/13/2000 | CA2284967A1 Method of formulating alkali earth salts |
| 04/05/2000 | EP0827487B1 Method for preparing a salt, particularly potassium chloride, by leaching and cooling a solution thereof |
| 03/29/2000 | EP0989096A2 Liquor oxalate stabilizers |
| 03/28/2000 | US6042622 Crystallizing alkali metal carbonate salt from aqueous solution in the presence of crystal growth promoting agent lecithin |
| 03/22/2000 | EP0986515A1 Method for preparing compositions containing essentially an absorbent anhydrous alkaline metal carbonate |
| 02/08/2000 | US6022516 Adding 1-hydroxy-ethylidene-1,1-diphosphonic acid prior to the steps of carbon dioxide removal, water removal and/or heating |
| 02/08/2000 | US6022385 Process for the manufacture of sodium carbonate crystals from minerals or solutions |
| 01/12/2000 | EP0969964A1 A thermal storage and transfer device |
| 01/04/2000 | US6010672 Process for producing sodium carbonate from trona ore |
| 12/15/1999 | CN2353731Y Carbonisation tower for producing high-quality heavy alkali |
| 11/23/1999 | US5989505 Method for recovery of alkali values from trona using air stripping |
| 11/09/1999 | US5980848 Method for production of sodium bicarbonate, sodium carbonate and ammonium sulfate from sodium sulfate |
| 11/03/1999 | CN2346774Y Internally circulating carbonators |
| 11/02/1999 | US5976403 Organoalkali compounds and their preparation |
| 10/14/1999 | WO1999051818A1 Active substance and device for the deacidification of printed matter |
| 10/14/1999 | CA2327786A1 Active substance and device for the deacidification of printed matter |
| 09/21/1999 | US5955043 Production of sodium carbonate from solution mine brine |
| 09/01/1999 | CN1044897C Large potassium bicarbonate crystals and process for preparation thereof |
| 08/17/1999 | US5939033 Solid hydrogen peroxide complex sealed in fluid communication with gas permeable, liquid impermeable membrane such that vapor is released through membrane upon heating |
| 08/17/1999 | US5938969 Fire suppressant powder |
| 08/05/1999 | WO1999038801A1 Sodium carbonate recrystallization |
| 08/05/1999 | WO1999038800A1 Method for purifying a gas consisting of acid compounds |
| 07/21/1999 | CN1044222C Method for comprehensive utilization of sodium sulfate containing chromium |
| 07/20/1999 | US5925316 Injection system and method for releasing gas or vapor from a solid material |
| 07/08/1999 | WO1999033750A1 Production of water-free soda |
| 07/06/1999 | US5919418 Delivery system and method for delivering a plurality of packages containing a solid material |
| 06/15/1999 | US5911959 Method for purification and production of saline minerals from trona |
| 06/15/1999 | US5911950 Method of releasing gas or vapor from a solid material |
| 05/20/1999 | WO1999024359A1 Carbon product rich in lithium for use as negative electrode in a lithium cell |
| 05/18/1999 | US5904897 Sterilization system and method |
| 05/18/1999 | CA2205199C Method for production of sodium bicarbonate, sodium carbonate and ammonium sulfate from sodium sulfate |
| 05/11/1999 | US5902560 Method for inhibiting precipitation of sodium oxalate in a Bayer process liquor |
| 05/06/1999 | EP0912442A1 Use of silica as agent for controlling the degradation of bicarbonate, resulting mixture and its application |
| 05/05/1999 | CN1215696A Method and apparatus for incineration treatment of caprolactam saponification waste lye to recover sodium carbonate |
| 05/05/1999 | CN1043214C Production of alkali metal carbonates |
| 05/04/1999 | US5900220 Soda ash processing method |
| 04/27/1999 | CA2116017C Production of sodium hydroxide |
| 04/14/1999 | EP0748252B1 Gas delivery apparatus and compositions for infusion |
| 04/07/1999 | CN1212950A Method and apparatus for concentrating salt-containing solutions |
| 04/07/1999 | CN1042824C Method for preparing chemical products containing sodium carbonate from brine solution containing sodium carbonate |
| 03/11/1999 | WO1999011455A1 A thermal storage and transfer device |
| 03/10/1999 | EP0687323B1 Zero discharge mill distillation, salt recovery, and water management |
| 02/10/1999 | EP0821618B1 Process and device for producing granulates by fluidised bed spray granulation |
| 01/21/1999 | DE19730573A1 Automatic control of carbonisation in production of potassium carbonate solution from potassium hydroxide solution |
| 01/19/1999 | CA2205493C Method for production of sodium bicarbonate, sodium carbonate and ammonium sulfate from sodium sulfate |
| 12/30/1998 | CN1203193A Inhibition of magnesium scale formation in production of soda ash from trona |
| 12/10/1998 | WO1998055399A1 Method for preparing compositions containing essentially an absorbent anhydrous alkaline metal carbonate |
| 12/09/1998 | EP0719359B1 Minimum adverse environmental impact pulp mill |
| 12/03/1998 | DE19722059A1 Recovery of gas mixtures containing hydrogen@ and carbon mon:oxide |
| 12/02/1998 | EP0881194A1 Reactive compound for removing acid compounds from fumes or gases at high temperature, and the process for its preparation |
| 11/11/1998 | CN1198406A Method for oxidation of at least one alkaline metal |
| 11/03/1998 | US5830422 Continuous processing |
| 09/30/1998 | CN1194236A Method of recovering waste slag |
| 09/16/1998 | EP0864535A2 Process and apparatus for evaporation of saline solutions |
| 09/16/1998 | CN1039802C Hydrotropic making halogen technology by separating salt and alkali in lake |
| 09/09/1998 | EP0862466A1 Vapor sterilization using inorganic hydrogen peroxide complexes |
| 09/02/1998 | EP0861094A1 Gas/vapor delivery from solid materials |
| 08/27/1998 | WO1998036842A1 Beneficiation of saline minerals |
| 08/19/1998 | EP0858429A1 Composition containing at least sodium bicarbonate, preparation method therefor and uses thereof |
| 08/05/1998 | CN1039436C Process for producing sodium salts from brines of sodium ores |
| 08/04/1998 | US5788947 Method for the production of anhydrous alkali metal carbonates |
| 07/28/1998 | US5785934 Vapor sterilization using inorganic hydrogen peroxide complexes |
| 07/22/1998 | EP0854115A1 Process for the oxidation of at least one alkali metal |
| 07/22/1998 | CN1039220C Improved steam calcining furnace for soda ash industry |
| 07/21/1998 | US5783159 Inorganic impurities removal in soda ash solutions with carbon |
| 07/07/1998 | US5776426 Using caustic liquid and lime |
| 07/07/1998 | US5776369 Alkali metal dispersions |
| 06/16/1998 | US5766270 Contacting ore with aqueous solution containing sodium carbonate to produce feed brine, steam stripping to convert sodium bicarbonate to sodium carbonate, cooling to precipitate crystals, separating, returning mother liquors to ore deposit |
| 06/03/1998 | CN1038577C Method for producing heavy soda ash and fixed decomposition reaction furnace thereby |
| 06/02/1998 | US5759507 Process for production of dense soda ash from soda ash fines |
| 05/20/1998 | CN1182377A Process and device for producing granulates by fluidised-bed spray granulation |
| 04/08/1998 | EP0833799A1 Method for production of sodium bicarbonate, sodium carbonate and ammonium sulfate from sodium sulfate |
| 04/01/1998 | CN1177572A Method for production of high-purity iron oxide red by using ammonia-soda process |
| 03/24/1998 | US5730875 Bringing a reactant gas and a reactant liquid into interfacial contact under conditions conducive to controlled chemical reaction between the gas and liquid |
| 03/11/1998 | EP0827487A1 Method for preparing a salt, particularly potassium chloride, by leaching and cooling a solution thereof |
| 03/04/1998 | CN1174813A Technology for producing pure alkali and ammonium chloride |
| 02/10/1998 | US5716419 Process for crystallization of mineral salts |
| 02/04/1998 | EP0821618A1 Process and device for producing granulates by fluidised bed spray granulation |
| 01/21/1998 | EP0599917B1 Production of alkali metal hydroxide and regeneration of pulp liquors |
| 01/15/1998 | WO1998001390A1 Use of silica as agent for controlling the degradation of bicarbonate, resulting mixture and its application |
| 12/30/1997 | US5702570 Process of producing sodium hydroxide from sodium sulphate in a pulp mill |
| 12/03/1997 | CN1166453A Combiend production process of potassium carbonate and light magnesium carbonate |
| 12/03/1997 | CN1166452A Sodium bicarbonate preparation by catalytic circulation process and multi-phase reactor thereof |
| 12/02/1997 | US5693597 Antiwear, extreme pressure oil additives |
| 11/19/1997 | CN1165114A Regeneration method for storage battery desulfurizing agent |
| 11/06/1997 | WO1997041271A1 Crystallization of sodium carbonates using alcohols |
| 10/14/1997 | US5678240 Sodium to sodium carbonate conversion process |
| 09/23/1997 | CA2056382C Aluminum-containing oxide, its molded article, and process for producing aluminum-containing oxide |
| 09/16/1997 | US5667753 Vapor sterilization using inorganic hydrogen peroxide complexes |
| 09/09/1997 | US5665327 Process for the manufacture of anhydrous sodium carbonate |
| 08/21/1997 | CA2246528A1 Red mud processing |
| 08/13/1997 | EP0614446B1 Production of alkali metal carbonates |
| 08/07/1997 | DE19631794A1 Removal of carbon di:oxide from exhaust gas of incinerators |
| 08/06/1997 | CN1156124A Process for producing low-salt heavy sodium carbonate |