| Patents for C01D 7 - Carbonates of sodium, potassium, or alkali metals in general (1,753) |
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| 10/12/2004 | CA2302751C Endothermic cooling agents |
| 10/07/2004 | US20040197258 Sodium carbonate recovery from waste streams and impounded sodium carbonate decahydrate deposits |
| 10/07/2004 | US20040195738 Continuous method and apparatus for manufacture of uniform size flake or powder |
| 09/29/2004 | EP0986515B1 Method for preparing compositions containing essentially an absorbent anhydrous alkaline metal carbonate |
| 09/29/2004 | EP0969964B1 A thermal control device |
| 09/21/2004 | US6793904 Method for the preparation of sodium percarbonate granules having enhanced stability |
| 09/07/2004 | US6787120 Volume reduction of aqueous waste by evaporative crystallization of burkeite and sodium salts |
| 09/01/2004 | CN1164493C Method for separating crystal slurry in synthetic heavy soda ash procedure |
| 08/26/2004 | WO2004071957A1 Method for recovering purified sodium bicarbonate and ammonium sulfate |
| 08/25/2004 | CN1522961A Process for preparing calcined soda by trona containing abundant sodium bicarbonate |
| 08/17/2004 | CA2235852C Gas/vapor delivery from solid materials |
| 08/12/2004 | US20040156775 Method for recovering purified sodium bicarbonate and ammonium sulfate |
| 08/04/2004 | EP1355854B1 Method for securely placing sodium percarbonate in bulk containers |
| 08/04/2004 | CN1517301A Method of preparing election class potassium carbonate using potassium rich rock |
| 07/28/2004 | CN1515491A Process for preparing alkali metal salt |
| 07/07/2004 | CN1156397C Method of formulating alkali metal salts |
| 07/01/2004 | US20040126292 Using carbon material; oxidation to carbon dioxide; exothermic reaction |
| 06/30/2004 | CN1508092A Method for preparing potash manure (kali salt) from potassium-rich rock using hydrothermal chemical reaction |
| 06/23/2004 | CN1507414A Abrasion-resistant agglomerate mineral substance granule, powder comprising such granules and production method therefore |
| 06/16/2004 | CN2620581Y High efficient natural circular external cooling carbonators |
| 06/16/2004 | CN1504412A Method for making superfine calcium carbonate using exhaust gas and liquid from ammonia-soda process for producing sodium carbonate |
| 06/02/2004 | EP1335881B1 Process for desalination of seawater |
| 06/02/2004 | CN1151966C Process for production of sodium carbonate |
| 05/06/2004 | DE4305802B4 Verfahren zur Herstellung von Soda A process for the production of soda ash |
| 04/28/2004 | CN1491890A Process for purifying ammonium sulfate |
| 04/21/2004 | CN1490247A Method for preparing soda from reussin |
| 04/20/2004 | CA2118943C Treatment of solid material |
| 03/25/2004 | US20040057892 Sodium bicarbonate production method |
| 03/25/2004 | US20040056235 Neutralization of prints such as books using potassium phosphate, carbonate or ammonium thiocyanate, distributed via screw conveyors, into air jets circulated by fans |
| 03/24/2004 | CN2607361Y Rotary material cooler for producing soda ash |
| 03/03/2004 | CN1140453C Method for raising purity of soda product and apparatus thereof |
| 03/03/2004 | CN1140452C Sodium preparation method for pulp-mixing medicine preparation |
| 03/02/2004 | US6699447 Multistage recrystallization using hot aqueous solution |
| 02/18/2004 | CN1475444A Method of producing soda using Gauber salt of natural salt lake sodium sulfate decahydrate resources blending with residuel halogen and carbonizing |
| 02/17/2004 | US6692716 Sodium sulfate and ammonium bicarbonate are reacted to form sodium bicarbonate; removal of carbonates; precipitating potassium sulfate; quality fertilizer |
| 02/12/2004 | US20040028597 Fullerenes |
| 02/12/2004 | US20040026982 Sodium carbonate and sodium bicarbonate production from nahcolitic oil shale |
| 02/04/2004 | CN1472139A Method for separating magma in producing soda process |
| 01/07/2004 | EP1377266A1 Micron sized bicarbonate particles and slurrys containing the same |
| 01/07/2004 | CN1133586C Cold separation and carbonization process for preparing sodium carbonate from natural soda |
| 12/31/2003 | CN1132783C Process for improving quality of sesquisoda crystallization |
| 12/31/2003 | CN1132782C Method for producing low salt low potassium heavy mass sodium carbonate by one step process |
| 12/24/2003 | WO2003106345A1 Continuous method and apparatus for manufacture of uniform size flake or powder |
| 12/23/2003 | US6667021 Method for producing enhanced sodium carbonate crystals for making sodium bicarbonate |
| 12/18/2003 | US20030232000 Continuous method and apparatus for manufacture of uniform size flake or powder |
| 12/17/2003 | EP1370491A1 Abrasion-resistant agglomerate mineral substance granule, powder comprising such granules and production method therefor |
| 12/10/2003 | CN1460642A Method for coproducing soda, potassium sulfate and ammonium chloride |
| 12/09/2003 | US6660049 Crystallizing carbonate salts from solution mined Nahcolite pregnant liquor having pH of 8 to 12 by incorporating into pregnant liquor at temperature of at least 170 degrees F., at least 2 ppm of food grade ampholytic crystal growth modifier |
| 11/26/2003 | CN1458065A Recovering process for NH3 and CO2 from production of low salt low potassium heavy sodium carbonate |
| 11/20/2003 | US20030215379 Low temperature heating and indirect heating; pollution control |
| 11/19/2003 | CN1128105C Sodium carbonate extracting process from caustic lime containing sodium sulfate |
| 11/13/2003 | US20030211027 Method for producing sodium hyrogencarbonate crystal particles having a low caking property, and sodium hydrogencarbonate crystal particles |
| 11/12/2003 | CN1455757A Process for desalination of seawater |
| 11/11/2003 | US6645298 Active substance and device for the deacidification of printed matter |
| 10/30/2003 | DE10206566C1 Plant for producing heavy soda, used e.g. in chemical, metal, paper or glass industry, has hopper with shaft for recycled heavy soda before shaft for light soda, feed screw to crystallizer and separator |
| 10/29/2003 | EP1357085A2 Method for producing sodium hydrogencarbonate crystal particles having a low caking property, and sodium hydrogencarbonate crystal particles |
| 10/29/2003 | EP1355854A1 Method for securely placing sodium percarbonate in bulk containers |
| 10/01/2003 | CN1122638C Comprehensive ultilization method of waste ammonia soda and sodium sulfate containing waste liquid |
| 09/24/2003 | CN1443711A External cooler heat-exchange process method in combined alkali-making method |
| 08/28/2003 | WO2003070636A1 Method of producing a silica aerogel and a sodium carbonate |
| 08/26/2003 | US6609761 Sodium carbonate and sodium bicarbonate production from nahcolitic oil shale |
| 08/20/2003 | EP1335881A1 Process for desalination of seawater |
| 08/05/2003 | CA2092380C Process and facility for mineral substance crystallization; process and facility for the crystallization of sodium carbonate monohydrate |
| 07/31/2003 | US20030143149 Sodium carbonate recovery from waste streams and impounded sodium carbonate decahydrate deposits |
| 07/22/2003 | US6595008 Process for the safe storage of sodium percarbonate in bulk containers |
| 07/08/2003 | US6589497 Process for preparing soda ash from solution mined bicarbonate brines |
| 06/25/2003 | EP0912442B8 Use of silica as agent for controlling the degradation of bicarbonate, resulting mixture and its application |
| 06/10/2003 | US6576209 Adding solid sodium carbonate to an aqueous of disodium carbonate/hydrogencarbonate; precipitating and separating sodium sesquicarbonate crystals of >50% the hydrogen carbonate; recovering the carbonate from the mother liquor |
| 06/10/2003 | US6576206 Bicarbonate conversion in a carbonate monohydrate process |
| 06/04/2003 | EP1051353B1 Method for purifying a gas consisting of acid compounds |
| 05/22/2003 | US20030095912 Crystallization of sodium carbonate decahydrate from liquors supersaturated in sodium bicarbonate |
| 05/15/2003 | US20030091486 Low temperature heating; air pollution control |
| 05/14/2003 | CN1417123A Production process of heavy soda ash |
| 05/08/2003 | US20030084547 Adding anhydrous sodium carbonate into a saturated sodium carbonate brine solution under conditions (controlling supersaturation) in which sodium carbonate monohydrate formation is favored |
| 04/30/2003 | CN1413909A Method for separating crystal slurry in synthetic heavy soda ash procedure |
| 04/23/2003 | EP0912442B1 Use of silica as agent for controlling the degradation of bicarbonate, resulting mixture and its application |
| 04/16/2003 | CN1410357A Method of preparing chromium oxide using wet reducing potassium bichromate or sodium bichromate |
| 04/02/2003 | EP1140701B1 Process for the production of sodium carbonate anhydrate |
| 03/19/2003 | CN1403373A Sulfate radical-eliminating process for underground bittern |
| 03/13/2003 | US20030049192 Crushing and calcinating a natural sodium carbonate-containing product; dissolving in water; decanting; adding a non-talow based non-fatty substituted cationic quaternary amine salt; filtering; crystallization |
| 02/19/2003 | CN2536571Y Pressurized carbonator cap |
| 02/05/2003 | EP1280761A2 Molecular arrangement with a structural configuration and use thereof for quantum-mechanical information processing |
| 02/04/2003 | US6514475 Crystallisation |
| 01/23/2003 | US20030017099 Sodium bicarbonate production method |
| 01/15/2003 | CN1390786A Process for preparing standard sodium carbonate from sodium sulfate |
| 01/09/2003 | US20030007923 Bicarbonate conversion in a carbonate monohydrate process |
| 12/19/2002 | US20020192140 Process for preparing soda ash from solution mined bicarbonate brines |
| 12/18/2002 | CN1096418C Process for preparing high-quality low-salt low-potassium heavy sodium carbonate and ammonium chloride |
| 11/27/2002 | CN1381400A Process for recovering alkali-contained salt mud of hydrazine hydrate by carbonizing and drying |
| 11/21/2002 | US20020172713 Micron sized bicarbonate particles and slurrys containing the same |
| 11/12/2002 | US6479025 Process for the production of sodium carbonate |
| 11/06/2002 | EP1084299B1 Device for the deacidification of printed matter |
| 11/05/2002 | US6475458 Method for formulating food grade sodium bicarbonate |
| 10/15/2002 | US6464736 Controlling saturation of brine solutions and purification of crystals from polymorphic compounds |
| 10/09/2002 | CN1373086A Process for preparing both sodium carbonate and silica white |
| 10/03/2002 | WO2002076420A1 Micron sized bicarbonate particles and slurrys containing the same |
| 10/03/2002 | US20020141930 Surface reaction between sodium percarbonate/bicarbonate and carbon dioxide to form dense solid film; for use in detergents containing zeolites |
| 09/18/2002 | CN1091085C Process for recovering nitrogen-contained organic alkali |
| 09/18/2002 | CN1091074C Sodium bicarbonate prepn. by catalytic circulation process and multi-phase reactor thereof |
| 09/11/2002 | CN1369025A Recrystallization process |