子分类：
| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 61 | PRODUCTION OF WATER-FREE SODA | EP98966423.0 | 1998-12-22 | EP1042226A1 | 2000-10-11 | MEIJER, Johannes, Albertus, Maria; GEERTMAN, Robert, Michael; OOSTERHOF, Harald; WITKAMP, Geert-Jan; VAN ROSMALEN, Gerda, MAria |
| A process is presented in which anhydrous soda is crystallized and worked up to produce anhydrous soda crystals with a bulk density from 1300 to 1600 kg/m3. The process is characterized in that a solvent is used that allows the crystals to be formed and handled at atomspheric pressure in the presence of water without the monohydrate of soda being formed. | ||||||
| 62 | Production of water-free soda | EP98203961.2 | 1998-11-24 | EP1013607A1 | 2000-06-28 | The designation of the inventor has not yet been filed |
A process is presented in which anhydrous soda is crystallized and worked-up to produce anhydrous soda crystals with a bulk density from 1300 to 1600 kg/m3. The process is characterized in that a solvent is used that allows the crystals to be formed and handled at atmospheric pressure in the presence of water without the monohydrate of soda being formed. |
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| 63 | Process for production of dense soda ash from soda ash fines | EP96201222.5 | 1996-05-02 | EP0742175A3 | 1998-01-07 | Delling, David R; Green, Kevin L; Phillip, James D; Robertson, Donald M |
This invention provides a method for the production of dense soda ash by reacting sodium carbonate decahydrate with a light soda ash or soda ash fines at an elevated temperature to produce sodium carbonate monohydrate crystals, and drying the sodium carbonate monohydrate to produce dense soda ash. |
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| 64 | Installation et procédé pour la cristallisation d'une substance minérale et procédé et installation pour la cristallisation de carbonate de sodium monohydraté | EP93200741.2 | 1993-03-15 | EP0562665A3 | 1994-08-31 | Ninane, Léon; Breton, Claude |
Installation pour la cristallisation d'une substance minérale dans un brouet de cristaux, par désursaturation d'une solution sursaturée, l'installation comprenant une chambre de cristallisation d'axe vertical, divisée en une zone centrale (4) et une zone annulaire (5), un dispositif (9, 10) conçu pour réaliser une translation verticale du brouet dans la zone centrale (4) et une translation de sens opposé dans la zone annulaire (5), un dispositif (8) de soutirage du brouet, comprenant un tuyau (23, 24) qui débouche dans l'une des zones précitées, un organe (14) de cisaillement mécanique du brouet, comprenant un disque (17) portant une couronne de dents de cisaillement (19), et un tube (6, 31) traversant le couvercle (30) et servant à l'admission de carbonate de sodium anhydre, le tube (31) présentant un prolongement à l'intérieur de la chambre de cristallisation sur lequel on fait circuler un film d'eau. |
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| 65 | Installation et procédé pour la cristallisation d'une substance minérale et procédé et installation pour la cristallisation de carbonate de sodium monohydraté | EP93200741.2 | 1993-03-15 | EP0562665A2 | 1993-09-29 | Ninane, Léon; Breton, Claude |
Installation pour la cristallisation d'une substance minérale dans un brouet de cristaux, par désursaturation d'une solution sursaturée, l'installation comprenant une chambre de cristallisation d'axe vertical, divisée en une zone centrale (4) et une zone annulaire (5), un dispositif (9, 10) conçu pour réaliser une translation verticale du brouet dans la zone centrale (4) et une translation de sens opposé dans la zone annulaire (5), un dispositif (8) de soutirage du brouet, comprenant un tuyau (23, 24) qui débouche dans l'une des zones précitées, un organe (14) de cisaillement mécanique du brouet, comprenant un disque (17) portant une couronne de dents de cisaillement (19), et un tube (6, 31) traversant le couvercle (30) et servant à l'admission de carbonate de sodium anhydre, le tube (31) présentant un prolongement à l'intérieur de la chambre de cristallisation sur lequel on fait circuler un film d'eau. |
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| 66 | ANHYDROUS SODIUM CARBONATE HAVING A LOW PORE CONTENT | US14362926 | 2012-11-10 | US20140336273A1 | 2014-11-13 | Jens Klatyk; Hans-Kurt Peth; Thorsten Wedel; Guenter Moddelmog |
| The present invention relates to a highly pure, anhydrous sodium carbonate having a low pore content for use in pharmaceutical formulations and in the foods industry. Furthermore, a novel process for the preparation of this sodium carbonate is provided. | ||||||
| 67 | Process for producing gas from mineral ore | US13147722 | 2010-02-09 | US20110318252A1 | 2011-12-29 | Francis Coustry; Perrine Davoine; Claude Criado; Thoi-Dai Chau |
| Process for producing a gas from a mineral ore, and in particular from trona ore, said gas having a carbon dioxide concentration of more than 25 volume percents expressed on dry gas, and a quantity of volatile organic compounds of less than 700 mg per kilogram of generated carbon dioxide. The process comprises the steps of crushing the trona ore, introducing crushed trona in a rotary calcining drum with indirect heating, calcining the crushed trona in the calcining device, collecting the calcined trona from calcining device and collecting the gas generated by the trona ore calcination from calcining device in order to constitute the produced gas. | ||||||
| 68 | Sodium bicarbonate production from nahcolite | US09540658 | 2000-03-31 | US06699447B1 | 2004-03-02 | Kurt R. Nielsen; Leo G. Cirotski; Allan L. Turner |
| A method for producing sodium bicarbonate from a nahcolite deposit comprising injecting water or other aqueous solution at a temperature of at least 250° F. into the deposit, dissolving sodium bicarbonate in the hot water to form a production solution and subjecting the production solution to multiple stages of crystallization. The sodium bicarbonate crystals may be dewatered and dried to form a commercial sodium bicarbonate product. | ||||||
| 69 | Crystallization of sodium carbonate decahydrate from liquors supersaturated in sodium bicarbonate | US10299515 | 2002-11-18 | US20030095912A1 | 2003-05-22 | William C. Copenhafer |
| A process for recovering sodium carbonate decahydrate crystals from solutions and mother liquors supersaturated in sodium bicarbonate concentration. Feed liquors containing higher levels of sodium bicarbonate than traditionally fed to a sodium carbonate decahydrate crystallizer are used to create a mother liquor within a sodium carbonate decahydrate crystallizer that is supersaturated with respect to sodium bicarbonate. Substantially pure sodium carbonate decahydrate crystals may be precipitated from the supersaturated mother liquor without substantially precipitation of sodium bicarbonate containing crystals. | ||||||
| 70 | Sodium carbonate recrystallization | US09910333 | 2001-07-20 | US20030084547A1 | 2003-05-08 | Wayne C. Hazen; Dale Lee Denham JR.; Rudolph Pruszko; David R. Baughman |
| The present invention provides a process for producing sodium carbonate monohydrate crystals by introduction of anhydrous sodium carbonate into a saturated sodium carbonate brine solution under conditions in which sodium carbonate monohydrate formation is favored. As the anhydrous sodium carbonate dissolves, the brine becomes supersaturated resulting in relief of supersaturation by formation of sodium carbonate monohydrate crystals. The process includes controlling supersaturation and its relief to achieve growth of existing sodium carbonate monohydrate crystals rather than nucleation and formation of new sodium carbonate monohydrate crystals. The resulting crystals are separated from insoluble impurities on a size separation basis. | ||||||
| 71 | Process for the production of sodium carbonate anhydrate | US09203270 | 1998-12-01 | US06514475B1 | 2003-02-04 | Harald Oosterhof; Gerda Maria van Rosmalen; Geert-Jan Witkamp; Johannes de Graauw |
| The invention is directed to a process for the production of sodium carbonate-anhydrate having a bulk density of at least 800 kg/m3, said process comprising: providing a suspension of solid sodium carbonate and/or solid sodium bicarbonate and/or solid double salts at least comprising one of sodium carbonate and sodium bicarbonate, in a mixture containing water and an organic, water miscible or partly water miscible solvent, which solvent influences the transition temperature below which sodium carbonate monohydrate is stable, whereby the type and the amount of solvent is selected in such way that the said transition temperature is below the boiling point of the said mixture of water and an organic, water miscible or partly water miscible solvent, in case sodium bicarbonate is present, converting the bicarbonate into carbonate, crystallising sodium carbonate anhydrate from said mixture at a temperature above the said transition temperature and below the said boiling point, and recovering the sodium carbonate anhydrate. | ||||||
| 72 | Process for the production of sodium carbonate | US09151694 | 1998-09-11 | US06479025B2 | 2002-11-12 | Dale Lee Denham, Jr.; Rudolph Pruszko; Wayne C. Hazen |
| A process for the production of sodium carbonate monohydrate is disclosed. The process includes heating a feed stream containing trona and insoluble impurities in a calcining apparatus to a temperature of less than about 350° C. to form anhydrous sodium carbonate. The anhydrous sodium carbonate is contacted with a saturated sodium carbonate brine solution to form sodium carbonate monohydrate crystals. Sodium carbonate monohydrate crystals are separated from insoluble impurities. | ||||||
| 73 | Production of water-free soda | US09218519 | 1998-12-22 | US06334989B1 | 2002-01-01 | Johannes Albertus Maria Meijer; Robert Michael Geertman; Harald Oosterhof; Geert-Jan Witkamp; Gerda Maria Van Rosmalen |
| A process is presented in which anhydrous soda is crystallized and worked up to produce anhydrous soda crystals with a bulk density from 1300 to 1600 kg/m3. The process is characterized in that a solvent is used that allows the crystals to be formed and handled at atmospheric pressure in the presence of water without the monohydrate of soda being formed. | ||||||
| 74 | Method for the production of anhydrous alkali metal carbonates | US598283 | 1996-02-08 | US5788947A | 1998-08-04 | Raymundo Ruiz-Luna |
| A method for producing anhydrous alkali metal carbonates by mixing sodium bicarbonate with a stoichiometric equivalent of an alkaline metal hydroxide in an aqueous solution which reacts in an exothermic reaction to produce a thermally stable alkaline compound of the bicarbonate and hydroxide used, free of other compounds. On dehydrating, without the need of higher temperatures of calcination, one yields an anhydrous alkali metal carbonate or a mixed alkali metal carbonate depending on whether the alkali metal hydroxide used is not sodium but some other member of the alkali metal family. The active element on hydration of these mixed alkali metal carbonates is the alkali metal of the hydroxide used with the sodium bicarbonate to produce the anhydrous mixed alkali metal carbonate. | ||||||
| 75 | Process for the manufacture of anhydrous sodium carbonate | US503290 | 1995-07-17 | US5665327A | 1997-09-09 | Philippe Warny |
| Process for the manufacture of anhydrous sodium carbonate, according to which a drier kiln including a rotary drum (1) is used, sodium carbonate monohydrate is introduced into an upstream region (4) of the drum, anhydrous sodium carbonate is collected in a downstream region (6) of the drum and a fraction of the anhydrous sodium carbonate is recycled from the downstream region into the upstream region, the recycling of the anhydrous sodium carbonate being performed inside the drum. | ||||||
| 76 | Process for producing anhydrous sodium carbonate crystal | US226168 | 1981-01-19 | US4406869A | 1983-09-27 | Keiichi Nakaya; Kohji Kawanami; Suekazu Hirata |
| An anhydrous sodium carbonate crystal is produced by crystallizing a sodium carbonate hydrate crystal from an aqueous solution of sodium carbonate in a sodium carbonate hydrate crystallizing zone and transforming said sodium carbonate hydrate to an anhydrous sodium carbonate crystal in the presence of a crystal habit modifier in an anhydrous sodium carbonate crystallizing zone and recycling a separated mother liquor into said sodium carbonate hydrate crystallizing zone. | ||||||
| 77 | Method for slurrying soda ash | US14306271 | 1971-05-13 | US3802848A | 1974-04-09 | WEEKS L; DORAN R |
| A method for forming soda ash slurries is described wherein large quantities of soda ash are dispersed and wetted with a soda ash solution to form a mixture of saturated soda ash and sodium carbonate monohydrate.
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| 78 | Use of carboxylic acids as crystal growth modifiers for sodium carbonate monohydrate | US3796794D | 1972-06-01 | US3796794A | 1974-03-12 | ILARDI J |
| SODIUM CARBONATE MONOHYDRATE OF ACICULAR CRYSTALLINE FORM IS OBTAINED BY CRYSTALLIZING SODIUM CARBONATE MONOHYDRATE IN AQUEOUS SOLUTION CONTAINING AS A CRYSTAL MODIFYING AGENT AN ALIPHATIC CARBOXYLIC ACID HAVING FROM 4 TO ABOUT 18 CARBON ATOMS AND FROM 1-3 CARBOXYLIC ACID FUNCTIONS. ON CALCINATION OF THE SODIUM CARBONATE MONOHYDRATE IT YIELDS SODA ASH HAVING A LOWER BULK DENSITY THAN THAT PRODUCED FROM UNMODIFIED SODIUM CARBONATE MONOHYDRATE.
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| 79 | Sodium carbonate crystallization process with foam prevention | US3725014D | 1971-04-21 | US3725014A | 1973-04-03 | PONCHA R; GAROFANO N; GANCY A |
| INVENTION RELATES TO THE PREPARATION OF SODIUM CARBONATE PRECURSOR CRYSTALS, SUCH AS SODIUM BICARBONATE, SODIUM SESQUICARBONATE, ANHYDROUS SODIUM CARBONATE, AND SODIUM CARBONATE MONOHYDRATE BY A CRYSTALLIZATION PROCESS WHICH INVOLVES CRYSTALLIZING SAID PRECURSOR CRYSTALS FROM A CARBONATE PROCESS SOLUTION IN THE PRESENCE OF AN ANTIFOAMING EFFECTIVE AMOUNT OF A CATIONIC SURFACE ACTIVE AGENT AND SEPARATING THE CRYSTALS FORMED FROM THE MOTHER LIQUOR.
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| 80 | Process for preparing sodium carbonate | US3771560 | 1960-06-21 | US3061409A | 1962-10-30 | ROBSON HOMER L; WOJCIK BRUNO H |
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