ES2349380A1 - System for the obtaining of calcium hydroxide from calcium sulfate. (Machine-translation by Google Translate, not legally binding) - Google Patents
System for the obtaining of calcium hydroxide from calcium sulfate. (Machine-translation by Google Translate, not legally binding) Download PDFInfo
- Publication number
- ES2349380A1 ES2349380A1 ES200900317A ES200900317A ES2349380A1 ES 2349380 A1 ES2349380 A1 ES 2349380A1 ES 200900317 A ES200900317 A ES 200900317A ES 200900317 A ES200900317 A ES 200900317A ES 2349380 A1 ES2349380 A1 ES 2349380A1
- Authority
- ES
- Spain
- Prior art keywords
- calcium
- sulfate
- calcium hydroxide
- ammonia
- obtaining
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 title claims abstract description 59
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 title claims abstract description 27
- 239000000920 calcium hydroxide Substances 0.000 title claims abstract description 25
- 229910001861 calcium hydroxide Inorganic materials 0.000 title claims abstract description 25
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 41
- 238000006243 chemical reaction Methods 0.000 claims abstract description 23
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 19
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims abstract description 12
- 235000011130 ammonium sulphate Nutrition 0.000 claims abstract description 11
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000000839 emulsion Substances 0.000 claims abstract description 7
- 239000011575 calcium Substances 0.000 claims description 26
- 229910000069 nitrogen hydride Inorganic materials 0.000 claims description 6
- 238000010908 decantation Methods 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 2
- 238000000354 decomposition reaction Methods 0.000 claims 1
- 239000002244 precipitate Substances 0.000 claims 1
- 235000011149 sulphuric acid Nutrition 0.000 claims 1
- 238000002425 crystallisation Methods 0.000 abstract description 6
- 230000008025 crystallization Effects 0.000 abstract description 6
- 238000002663 nebulization Methods 0.000 abstract description 4
- 238000004090 dissolution Methods 0.000 abstract description 2
- 235000011132 calcium sulphate Nutrition 0.000 abstract 3
- -1 amine sulphate Chemical class 0.000 abstract 1
- 239000001175 calcium sulphate Substances 0.000 abstract 1
- 229910021653 sulphate ion Inorganic materials 0.000 abstract 1
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 8
- 239000000292 calcium oxide Substances 0.000 description 5
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 4
- 229910000019 calcium carbonate Inorganic materials 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000005979 thermal decomposition reaction Methods 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical class [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/02—Oxides or hydroxides
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2/00—Lime, magnesia or dolomite
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
Description
Obtención de hidróxido cálcico a partir de sulfato cálcico.Obtaining calcium hydroxide from calcium sulfate
La gran preocupación que implican las emisiones de CO_{2} a la atmósfera y la entrada en vigor de protocolos, como el de Kyoto, así como medidas gubernamentales en la materia encaminadas a penalizar a aquellas empresas que más CO_{2} emitan a la atmósfera, justifica de por sí la iniciativa de cualquier invención que sea capaz de reducir ó mitigar las emisiones de CO_{2} en los procesos industriales.The major concern of emissions of CO2 to the atmosphere and the entry into force of protocols, such as that of Kyoto, as well as government measures in the matter aimed at penalizing those companies that emit more CO_ {2} to the atmosphere, justifies the initiative of any invention that is capable of reducing or mitigating emissions from CO_ {2} in industrial processes.
En el estado actual, la obtención del óxido cálcico -CaO- hidróxido cálcico -Ca(OH_{2})-, se realiza mediante la calcinación de la piedra caliza, compuesta mayoritariamente por carbonato cálcico -CaCO_{3}-, de forma que se desprende CO_{2} que es emitido a la atmósfera y queda el óxido cálcico -CaO-, que previa su hidratación se convierte en hidróxido cálcico -Ca(OH)_{2}-. El óxido e hidróxido cálcico -CaO y Ca(OH)_{2}-, tienen multitud de aplicaciones especialmente en las cementeras para producir el cemento porlant, por lo que las emisiones de CO_{2} a la atmósfera para la obtención de óxido e hidróxido cálcico -CaO y Ca(OH)_{2}- son de mucha importancia.In the current state, obtaining the oxide calcium -CaO- calcium hydroxide -Ca (OH2) -, is performed by calcining limestone, composed mostly by calcium carbonate -CaCO3 -, so that emits CO2 which is emitted into the atmosphere and the oxide remains calcium -CaO-, which prior hydration becomes hydroxide calcium -Ca (OH) 2 -. Oxide and calcium hydroxide -CaO and Ca (OH) 2 -, have many applications especially in cement plants to produce porlant cement, so the CO2 emissions into the atmosphere for the obtaining calcium oxide and hydroxide -CaO and Ca (OH) 2 - are very important.
Es dentro de esta realidad, donde se encuadra la presente invención, que desarrolla un sistema para evitar las emisiones de CO_{2} en la producción del óxido e hidróxido cálcico -CaO y Ca(OH)_{2}- y que se consigue mediante un proceso de reacciones químicas. La invención consiste en obtener el hidróxido cálcico -Ca(OH)_{2}- tomando como materia prima el sulfato cálcico -CaSO_{4}-, en lugar del carbonato cálcico -CaCO_{3}-, evitando así la emisión de CO_{2} a la atmósfera, como ocurre en la actualidad.It is within this reality, where the present invention, which develops a system to avoid CO2 emissions in the production of calcium oxide and hydroxide -CaO and Ca (OH) 2 - and which is achieved by a chemical reaction process. The invention consists in obtaining the calcium hydroxide -Ca (OH) 2 - taking as matter premium calcium sulfate -CaSO_ {4} -, instead of carbonate calcium -CaCO_ {3} -, thus avoiding the emission of CO2 to the atmosphere, as is the case today.
Por todo ello el motivo de la presente invención trata de reducir las emisiones de CO_{2} producido por calcinación del carbonato cálcico -CaCO_{3}-, para obtener el hidróxido cálcico -Ca(OH)_{2}- partiendo del sulfato cálcico -CaCO_{4}- como materia prima, para la obtención de dicho producto.Therefore, the reason for the present invention tries to reduce CO2 emissions produced by calcination of the calcium carbonate -CaCO 3 -, to obtain the hydroxide calcium -Ca (OH) 2 - starting from calcium sulfate -CaCO_ {4} - as raw material, to obtain said product.
La presente invención, tal y como expresa el enunciado de esta memoria descriptiva, consiste en un nuevo "Sistema para la obtención de hidróxido cálcico -Ca(OH)_{2}- a partir del sulfato cálcico -CaCO_{4}-", reduciendo las emisiones de CO_{2} que actualmente se emiten a la atmósfera cuando se obtiene el óxido cálcico -CaO- y por hidratación, el hidróxido cálcico -Ca(OH)_{2}-, a cuando la materia prima de la que se parte es el carbonato cálcico -CaCO_{3}-.The present invention, as expressed by the stated in this descriptive report, it consists of a new "System for obtaining calcium hydroxide -Ca (OH) 2 - from calcium sulfate -CaCO_ {4} - ", reducing the CO2 emissions that currently they are emitted into the atmosphere when rust is obtained calcium -CaO- and by hydration, calcium hydroxide -Ca (OH) 2 -, when the raw material from which part is calcium carbonate -CaCO 3 -.
"El sistema para la obtención de hidróxido cálcico -Ca(OH)_{2}- a partir del sulfato cálcico -CaCO_{4}-", viene determinado por la trituración del mineral de sulfato cálcico -CaCO_{4}-, con una granulometría inferior a cincuenta mieras. El sulfato cálcico -CaCO_{4}- micronizado, lo introduciremos en un "depósito de reacción", a temperatura y presión ambiente."The system for obtaining hydroxide calcium -Ca (OH) 2 - from calcium sulfate -CaCO_ {4} - ", is determined by the crushing of the ore of calcium sulfate -CaCO4 -, with a particle size lower than fifty microns Calcium sulfate -CaCO4 - micronized, what we will introduce in a "reaction tank", at temperature and ambient pressure
En una torre de platos, disolveremos amoniaco -NH_{3}- en agua, hasta su saturación, para formar el ion -NH_{4}^{+}- en la disolución.In a tower of dishes, we will dissolve ammonia -NH_ {3} - in water, until saturation, to form the ion -NH 4 + - in the solution.
Dicha agua saturada de amoniaco -NH_{3}- la introduciremos en el deposito de reacción, con la finalidad de crear una emulsión dentro del mismo. La emulsión la realizamos mediante una agitación continua a tres mil vueltas por minuto, para favorecer la reacción química principal. El sulfato cálcico -CaCO_{4}- micronizado, en combinación con el agua con el amoniaco -NH_{3}- disuelto, producirá la siguiente reacción química:Said saturated ammonia water -NH3 - the we will introduce in the reaction tank, in order to create An emulsion inside it. We perform the emulsion through a continuous stirring at three thousand turns per minute, to favor The main chemical reaction. Calcium sulfate -CaCO_ {4} - micronized, in combination with water with ammonia -NH3 - dissolved, it will produce the following chemical reaction:
CaSO_{4} + NH_{4}^{+} ====> (NH_{4})_{2}SO_{4} + Ca(OH)_{2}CaSO_ {4} + NH_ {4} + <===> (NH_ {4}) 2 SO_ {4} + Ca (OH) 2
De manera que el sulfato cálcico -CaCO_{4}- se trasforma en sulfato amónico e hidróxido cálcico -Ca(OH)_{2}-.So the calcium sulfate -CaCO4 - is transformation into ammonium sulfate and calcium hydroxide -Ca (OH) 2 -.
El hidróxido cálcico -Ca(OH)_{2}-, que es insoluble, se recupera por decantación, del depósito de reacción. El sulfato de amonio -(NH_{4})_{2}SO_{4}-, que es soluble, queda en la disolución. La disolución del sulfato amónico -(NH_{4})SO_{4}- se extrae del depósito y se somete a un tratamiento de cristalización por nebulización para conseguir la cristalización del sulfato amónico -(NH_{4})_{2}SO_{4}-. Una vez cristalizado el sulfato amónico, a una temperatura de 338 grados centígrados, se descompone térmicamente, en ácido sulfúrico concentrado -H_{2}SO_{4}- y amoniaco -NH_{3}- en forma de gas. El amoniaco -NH_{3}-, que se recupera, se reutiliza de nuevo en la reacción principal.Calcium hydroxide -Ca (OH) 2 -, which is insoluble, is recovered by decantation, of the reaction tank. Ammonium sulfate - (NH 4) 2 SO 4 -, which is soluble, remains in the dissolution. The ammonium sulfate solution - (NH_ {4}) SO_ {4} - is removed from the tank and subjected to a mist crystallization treatment to achieve crystallization of ammonium sulfate - (NH 4) 2 SO 4 -. Once the sulfate crystallized ammonium, at a temperature of 338 degrees Celsius, decomposes thermally, in concentrated sulfuric acid -H 2 SO 4 - and ammonia -NH 3 - in the form of gas. Ammonia -NH 3 -, which is recover, reuse again in the main reaction.
"Sistema para la obtención de hidróxido cálcico Ca(OH)_{2} a partir del sulfato cálcico -CaCO_{4}-", que consiste, tal como hemos indicado anteriormente, en la introducción de sulfato cálcico micronizado -CaCO_{4}- en un depósito de reacción."System for obtaining hydroxide calcium Ca (OH) 2 from calcium sulfate -CaCO_ {4} - ", which consists, as we have indicated previously, in the introduction of micronized calcium sulfate -CaCO_ {4} - in a reaction tank.
Con independencia de lo anterior, introducimos en una torre de platos agua y amoniaco -NH_{3}- hasta su saturación, para que los iones resultantes en disolución sean iones amonio -NH_{4}^{+}-. Una vez disuelto el agua y el amoniaco -NH_{3}-, lo introduciremos en el depósito de reacción, donde ya habíamos introducido el sulfato cálcico -CaCO_{4}- micronizado.Regardless of the above, we introduce in a tower of water and ammonia dishes -NH_ {3} - until its saturation, so that the resulting ions in solution are ions ammonium -NH 4 + -. Once dissolved the water and the ammonia -NH_ {3} -, we will introduce it in the reaction tank, where already we had introduced the calcium sulfate -CaCO_ {4} - micronized
Mediante un agitador mecánico y a tres mil
revoluciones por minuto crearemos una emulsión dentro del depósito,
para que reaccionen el sulfato cálcico -CaCO_{4}- con el amoniaco
-NH_{3}- en disolución. La reacción produce
-(NH_{4})_{2}SO_{4}- sulfato de amonio, que se queda en
la disolución e hidróxido cálcico -Ca(OH)_{2}- que
decanta.By means of a mechanical stirrer and at three thousand revolutions per minute we will create an emulsion inside the tank, so that the calcium sulfate -CaCO_ {4} - reacts with the ammonia -NH3 {- in solution. The reaction produces
- (NH 4) 2 SO 4 -ammonium sulfate, which remains in the solution and calcium hydroxide -Ca (OH) 2 - which decants.
Finalizada esta fase del proceso en el depósito de reacción, el hidróxido cálcico -Ca(OH)_{2}-, es recuperado por decantación y el sulfato de amonio -(NH_{4})_{2}SO_{4}- lo someteremos a un tratamiento de cristalización por nebulización para alcanzar su estado sólido.After this phase of the process in the warehouse of reaction, calcium hydroxide -Ca (OH) 2 -, is recovered by decantation and ammonium sulfate - (NH 4) 2 SO 4 - we will undergo a treatment of nebulization crystallization to reach its solid state.
Posteriormente y a una temperatura de 338 grados centígrados, por descomposición térmica, obtendremos el ácido sulfúrico concentrado -H_{2}SO_{4}- y amoniaco en gas -NH_{3}-. El amoniaco -NH_{3}-, que se recupera, vuelve a ser introducida dentro de la torre de platos para su reutilización de una forma continuada.Subsequently and at a temperature of 338 degrees Celsius, by thermal decomposition, we will obtain the acid concentrated sulfuric acid -H 2 SO 4 - and gas ammonia -NH_ {3} -. The ammonia -NH 3 -, which is recovered, is again introduced into the dish tower for reuse of A continuous way.
En la Figura número 1, se representa de forma gráfica, el conjunto de elementos que conforman el "Sistema para la obtención de hidróxido cálcico a partir del sulfato cálcico -CaCO_{4}-" y donde (1) representa el deposito de reacción, donde se introduce el sulfato cálcico -CaCO_{4}- micronizado (2).In Figure number 1, it is represented graphic, the set of elements that make up the "System for obtaining calcium hydroxide from calcium sulfate -CaCO_ {4} - "and where (1) represents the reaction tank, where calcium sulfate -CaCO4 - micronized is introduced (2).
El (3) y como proceso independiente representa una torre de platos, donde introducimos agua y amoniaco -NH_{3}- (4) hasta su saturación, para que los iones resultantes en disolución sean NH_{4}-.The (3) and as an independent process represents a tower of dishes, where we introduce water and ammonia -NH_ {3} - (4) until saturation, so that the ions resulting in solution be NH4 -.
El resultado se introduce en el depósito de reacción (1), donde ya habíamos introducido el sulfato cálcico -CaCO_{4}- micronizado (2). Mediante un agitador mecánico y a tres mil revoluciones por minuto crearemos una emulsión dentro del deposito, para que reaccionen el sulfato cálcico -CaCO_{4}- con el ion amonio -NH_{4}^{+}- en disolución.The result is entered in the deposit of reaction (1), where we had already introduced calcium sulfate -CaCO4 - micronized (2). Through a mechanical stirrer and three thousand revolutions per minute we will create an emulsion within the deposit, so that the calcium sulfate -CaCO_ {4} react with the ammonium ion -NH 4 + - in solution.
La reacción que tiene lugar en el depósito de reacción, produce -(NH_{4})_{2}SO_{4} - sulfato de amonio (6), que se queda en la disolución e hidróxido cálcico Ca(OH)_{2} que decanta y recupera (5).The reaction that takes place in the deposit of reaction, produces - (NH4) 2 SO4-sulfate ammonium (6), which remains in the solution and calcium hydroxide Ca (OH) 2 decanting and recovering (5).
El sulfato de amonio -(NH_{4})_{2}SO_{4}- (6), que como hemos comentado teníamos en disolución, lo someteremos a un tratamiento de cristalización por nebulización (7) para alcanzar su estado sólido, donde posteriormente y por descomposición térmica, obtendremos el ácido sulfúrico -H_{2}SO_{4}- (8) y amoniaco -NH_{3}- en gas (4) que se recupera y vuelve a ser introducida dentro de la torre de platos para su reutilización de una forma continuada, concluyendo de esta forma el proceso de "Obtención de hidróxido cálcico a partir del sulfato cálcico".Ammonium sulfate - (NH 4) 2 SO 4 - (6), which as we have commented we had in solution, we will undergo a treatment of nebulization crystallization (7) to reach its solid state, where later and by thermal decomposition, we will obtain the sulfuric acid -H 2 SO 4 - (8) and ammonia -NH 3 - in gas (4) that is recovered and reintroduced into the tower of dishes for reuse on an ongoing basis, concluding this way the process of "Obtaining calcium hydroxide from of calcium sulfate. "
A continuación se realiza una breve descripción de la invención para la "Obtención del hidróxido cálcico a partir del sulfato cálcico -CaCO_{4}-" donde podemos observar a través del esquema de la fig ura número 1 descrita, como, una vez micronizado el Sulfato cálcico -CaCO_{4}- (2), lo introducimos en un depósito de reacción (1), donde así mismo introduciremos el resultado de la saturación de agua y amoniaco -NH_{3}- (4) en una torre de platos (3) resultando de esa saturación, NH_{4}^{+}.A brief description follows. of the invention for "Obtaining calcium hydroxide from of calcium sulfate -CaCO_ {4} - "where we can observe through of the scheme of figure ura number 1 described, as, once Micronized the calcium sulfate -CaCO4 - (2), we introduce it in a reaction tank (1), where we will also introduce the water and ammonia saturation result -NH3 - (4) in one tower of dishes (3) resulting from that saturation, NH4 +.
En el deposito de reacción (1) y mediante un agitador mecánico y a tres mil revoluciones por minuto crearemos una emulsión que hará reaccionar el sulfato cálcico -CaCO_{4}- con el amoniaco -NH_{3}- en disolución La reacción que tiene lugar en el depósito de reacción, produce -(NH_{4})_{2}SO_{4}- sulfato de amonio, que se queda en la disolución (6) y por otro lado tenemos el hidróxido cálcico Ca(OH)_{2} que decanta (5).In the reaction tank (1) and by means of a mechanical stirrer and at three thousand revolutions per minute we will create a emulsion that will react the calcium sulfate -CaCO4 - with the ammonia -NH3 - in solution The reaction that takes place in the reaction tank, produces - (NH 4) 2 SO 4 - ammonium sulfate, which stays in the solution (6) and on the other hand we have the calcium hydroxide Ca (OH) 2 that decants (5).
Finalizada esta fase del proceso en el depósito de reacción, habremos obtenido el hidróxido cálcico -Ca(OH)_{2}- que se recupera por decantación (5) y sulfato de amonio -(NH_{4})_{2}SO_{4} (6). A fin de recuperar los reactivos utilizados, someteremos el sulfato de amonio -(NH_{4})_{2}SO_{4}- a un tratamiento de cristalización por nebulización (7) para alcanzar su estado sólido, donde posteriormente y por descomposición térmica, obtendremos el ácido sulfúrico (H_{2}SO_{4}) (8) y amoniaco en gas -NH_{3}- (4) que se recupera y vuelve a ser introducida dentro de la torre de platos para su reutilización de una forma continuada.After this phase of the process in the warehouse reaction, we will have obtained calcium hydroxide -Ca (OH) 2 - which is recovered by decantation (5) and ammonium sulfate - (NH 4) 2 SO 4 (6). For the purpose of recover the reagents used, we will submit the ammonium sulfate - (NH 4) 2 SO 4 - to a crystallization treatment by nebulization (7) to reach its solid state, where subsequently and by thermal decomposition, we will obtain the acid sulfuric (H 2 SO 4) (8) and ammonia in gas -NH 3 - (4) which it recovers and is reintroduced into the dish tower for reuse in a continuous way.
Claims (2)
\vskip1.000000\baselineskip\ vskip1.000000 \ baselineskip
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES200900317A ES2349380B1 (en) | 2009-01-30 | 2009-01-30 | SYSTEM FOR OBTAINING CALCIUM HYDROXIDE FROM CALCICO SULPHATE. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES200900317A ES2349380B1 (en) | 2009-01-30 | 2009-01-30 | SYSTEM FOR OBTAINING CALCIUM HYDROXIDE FROM CALCICO SULPHATE. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| ES2349380A1 true ES2349380A1 (en) | 2010-12-30 |
| ES2349380B1 ES2349380B1 (en) | 2011-10-25 |
Family
ID=43415467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES200900317A Expired - Fee Related ES2349380B1 (en) | 2009-01-30 | 2009-01-30 | SYSTEM FOR OBTAINING CALCIUM HYDROXIDE FROM CALCICO SULPHATE. |
Country Status (1)
| Country | Link |
|---|---|
| ES (1) | ES2349380B1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2182078A (en) * | 1936-09-28 | 1939-12-05 | American Smelting Refining | Production of ammonia from ammonium sulphate |
| US2740691A (en) * | 1953-05-25 | 1956-04-03 | Univ Oklahoma Res Inst | Process for the recovery of lime and hydrogen sulfide from calcium sulfate |
| US2795486A (en) * | 1952-08-14 | 1957-06-11 | Shell Dev | Preparation of ammonium sulfate |
| WO1996009248A1 (en) * | 1994-09-22 | 1996-03-28 | Super Paper Oy | A method to prepare calcium carbonate |
| ES2247099T3 (en) * | 2000-04-21 | 2006-03-01 | Sarp Industries | TREATMENT AND REVALUATION PROCEDURE OF EFFLUENTS CONTAINING METAL SULPHATES USING AN ADDITION STAGE OF AMMONIA. |
-
2009
- 2009-01-30 ES ES200900317A patent/ES2349380B1/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2182078A (en) * | 1936-09-28 | 1939-12-05 | American Smelting Refining | Production of ammonia from ammonium sulphate |
| US2795486A (en) * | 1952-08-14 | 1957-06-11 | Shell Dev | Preparation of ammonium sulfate |
| US2740691A (en) * | 1953-05-25 | 1956-04-03 | Univ Oklahoma Res Inst | Process for the recovery of lime and hydrogen sulfide from calcium sulfate |
| WO1996009248A1 (en) * | 1994-09-22 | 1996-03-28 | Super Paper Oy | A method to prepare calcium carbonate |
| ES2247099T3 (en) * | 2000-04-21 | 2006-03-01 | Sarp Industries | TREATMENT AND REVALUATION PROCEDURE OF EFFLUENTS CONTAINING METAL SULPHATES USING AN ADDITION STAGE OF AMMONIA. |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2349380B1 (en) | 2011-10-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Sanna et al. | Carbon dioxide capture and storage by pH swing aqueous mineralisation using a mixture of ammonium salts and antigorite source | |
| Chowdhury et al. | Magnesium oxide as an efficient catalyst for CO2 fixation and N-formylation reactions under ambient conditions | |
| US7604787B2 (en) | Process for sequestering carbon dioxide and sulfur dioxide | |
| Xie et al. | Scientific and engineering progress in CO2 mineralization using industrial waste and natural minerals | |
| CN102557142B (en) | Method for recovering tungsten trioxide and ammonium metavanadate from selective catalytic reduction (SCR) denitration catalyst | |
| CN102794093A (en) | Integrated technology for capturing and mineralizing carbon dioxide | |
| Liu et al. | Combined synthesis of Li4SiO4 sorbent with high CO2 uptake in the indirect carbonation of blast furnace slag process | |
| Eloneva | Reduction of CO2 emissions by mineral carbonation: steelmaking slags as raw material with a pure calcium carbonate end product | |
| JP2020511757A5 (en) | ||
| CN104384171B (en) | The resource recoverying and utilizing method of pyrite cinder | |
| EP2736847A1 (en) | Conversion of gaseous carbon dioxide into aqueous alkaline and/or alkaline earth bicarbonate solutions | |
| Zevenhoven et al. | Carbon storage by mineralisation (CSM): Serpentinite rock carbonation via Mg (OH) 2 reaction intermediate without CO2 pre-separation | |
| JP2012131697A (en) | Immobilizing method of carbon dioxide | |
| CN114555539A (en) | Process for producing calcium oxide or ordinary portland cement from calcium-containing rocks and minerals | |
| KR20150010704A (en) | Selective extraction of potassium chloride from schoenite end liquor employing tartaric acid as safe, benign and recyclable extractant | |
| ES2349380B1 (en) | SYSTEM FOR OBTAINING CALCIUM HYDROXIDE FROM CALCICO SULPHATE. | |
| CN104211104B (en) | The separation and recovery of firepower coal-fired plant desulfurized gesso of flue gas waste residue utilizes method | |
| CL2016002716A1 (en) | Method to produce lithium carbonate | |
| US6334990B1 (en) | Formulation of potassium sulfate, sodium carbonate and sodium bicarbonate from potash brine | |
| RU2009106677A (en) | GRANULAR FERTILIZER CONTAINING WATER-SOLUBLE FORMS OF NITROGEN, MAGNESIUM AND SULFUR, AND METHOD FOR PRODUCING IT | |
| CN104192850B (en) | A kind of serpentine processes the method for Graphene waste sulfuric acid | |
| KR20140087331A (en) | Method of manufacturing calcium carbonate from calcium silicate by-products | |
| Azdarpour et al. | Calcium carbonate production through direct mineral carbon dioxide sequestration | |
| Zevenhoven et al. | Mineral sequestration for CCS in Finland and abroad | |
| RU2472701C1 (en) | Method of producing thermally expanded graphite, thermally expanded graphite and foil based thereon |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FG2A | Definitive protection |
Ref document number: 2349380 Country of ref document: ES Kind code of ref document: B1 Effective date: 20111025 |
|
| FD2A | Announcement of lapse in spain |
Effective date: 20180924 |