RU2255045C1 - Method for concentrating calcium chloride solution - Google Patents
Method for concentrating calcium chloride solution Download PDFInfo
- Publication number
- RU2255045C1 RU2255045C1 RU2004106519/15A RU2004106519A RU2255045C1 RU 2255045 C1 RU2255045 C1 RU 2255045C1 RU 2004106519/15 A RU2004106519/15 A RU 2004106519/15A RU 2004106519 A RU2004106519 A RU 2004106519A RU 2255045 C1 RU2255045 C1 RU 2255045C1
- Authority
- RU
- Russia
- Prior art keywords
- calcium chloride
- concentration
- solution
- cacl
- chloride solution
- Prior art date
Links
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 12
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000001110 calcium chloride Substances 0.000 claims abstract description 20
- 229910001628 calcium chloride Inorganic materials 0.000 claims abstract description 20
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910000041 hydrogen chloride Inorganic materials 0.000 claims abstract description 15
- DHRRIBDTHFBPNG-UHFFFAOYSA-L magnesium dichloride hexahydrate Chemical compound O.O.O.O.O.O.[Mg+2].[Cl-].[Cl-] DHRRIBDTHFBPNG-UHFFFAOYSA-L 0.000 claims abstract description 6
- 239000002244 precipitate Substances 0.000 claims abstract description 5
- 235000019738 Limestone Nutrition 0.000 claims abstract description 4
- 238000010521 absorption reaction Methods 0.000 claims abstract description 4
- 239000006028 limestone Substances 0.000 claims abstract description 4
- 230000003993 interaction Effects 0.000 claims abstract description 3
- 150000004679 hydroxides Chemical class 0.000 claims abstract 2
- 239000002699 waste material Substances 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract 2
- 238000000926 separation method Methods 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 22
- 239000006096 absorbing agent Substances 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 239000000920 calcium hydroxide Substances 0.000 description 3
- 235000011116 calcium hydroxide Nutrition 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 150000004677 hydrates Chemical class 0.000 description 2
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 2
- 235000012254 magnesium hydroxide Nutrition 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- WMFHUUKYIUOHRA-UHFFFAOYSA-N (3-phenoxyphenyl)methanamine;hydrochloride Chemical compound Cl.NCC1=CC=CC(OC=2C=CC=CC=2)=C1 WMFHUUKYIUOHRA-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 235000014413 iron hydroxide Nutrition 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012452 mother liquor Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000012047 saturated solution Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Landscapes
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
Description
Изобретение относится к области получения товарного раствора хлорида кальция преимущественно из отходов первичной переработки бишофита, в частности из образующихся при переработке разбавленных растворов СаСl2.The invention relates to the field of obtaining a commodity solution of calcium chloride mainly from waste bischofite primary processing, in particular from diluted CaCl 2 solutions formed during processing.
Известен способ получения хлористого кальция (авт. свид. SU №513934, опубл. 1976), в котором насыщенный раствор хлористого кальция, образующийся при взаимодействии известняка с соляной кислотой, абсорбирует хлористый водород с нагреванием и повышением концентрации CaCl2. Затем раствор охлаждают, отделяют выпавшие кристаллы гидрата хлористого кальция, а маточный раствор разбавляют водой и вновь подают в абсорбер.A known method of producing calcium chloride (ed. Certificate. SU No. 513934, publ. 1976), in which a saturated solution of calcium chloride formed during the interaction of limestone with hydrochloric acid, absorbs hydrogen chloride with heating and increasing the concentration of CaCl 2 . Then the solution is cooled, precipitated crystals of calcium chloride hydrate are separated, and the mother liquor is diluted with water and again fed to the absorber.
Недостатками известного способа является его высокая энергоемкость и, соответственно, высокая стоимость получаемого конечного продукта - кристаллогидратов хлорида кальция, которые отфильтровывают, промывают и отправляют на дальнейшую обработку. Товарный раствор СаСl2 при этом не производится.The disadvantages of this method is its high energy intensity and, accordingly, the high cost of the resulting final product is calcium chloride crystalline hydrates, which are filtered off, washed and sent for further processing. Commodity solution CaCl 2 is not produced.
Наиболее близким техническим решением является способ получения раствора хлорида кальция из кальцийсодержащих отходов магниевого производства (авт. свид. SU №1065342, опубл. 1984 г.). Способ включает обработку кальцийсодержащих отходов соляной кислотой с получением суспензии, которую далее смешивают с известковым молоком, предварительно обработанным хлорсодержащими газами. При этом обработку ведут до рН 5-8 и концентрации СаСl2 не более 25 мас.%. Недостатком этого способа является низкая концентрация хлорида кальция, что сужает область применения получаемого раствора.The closest technical solution is a method of obtaining a solution of calcium chloride from calcium-containing waste magnesium production (ed. Certificate. SU No. 1065342, publ. 1984). The method includes treating calcium-containing waste with hydrochloric acid to obtain a suspension, which is then mixed with milk of lime pretreated with chlorine-containing gases. When this treatment is carried out to a pH of 5-8 and a concentration of CaCl 2 not more than 25 wt.%. The disadvantage of this method is the low concentration of calcium chloride, which narrows the scope of the resulting solution.
Предлагаемый согласно изобретению способ позволяет получать товарный раствор хлорида кальция технического концентрацией 32-35 мас.%, соответствующего ГОСТ 450-77, путем концентрирования слабых растворов хлорида кальция, образующихся, например, при первичной обработке бишофита.Proposed according to the invention, the method allows to obtain a commodity solution of calcium chloride with an industrial concentration of 32-35 wt.%, Corresponding to GOST 450-77, by concentrating weak solutions of calcium chloride, formed, for example, during the initial processing of bischofite.
Указанный результат достигается тем, что слабый раствор CaCl2 концентрацией 10-20 маc.%, образующийся при переработке бишофита, обрабатывают в две стадии. Сначала проводят изотермическую абсорбцию при 10-15°С хлористого водорода слабым раствором СаСl2 до концентрации НСl в растворе 22-25 мас.%. Затем в раствор добавляют известняк (в виде известкового молока), который взаимодействует с хлористым водородом по реакции 2НСl+СаСО3=CaCl2+Н2O+СO2 до концентрации CaCl2 в растворе 32-35 маc.%.The specified result is achieved in that a weak solution of CaCl 2 with a concentration of 10-20 wt.%, Formed during the processing of bischofite, is processed in two stages. First, isothermal absorption is carried out at 10-15 ° C of hydrogen chloride with a weak solution of CaCl 2 to a concentration of Hcl in the solution of 22-25 wt.%. Then, limestone is added to the solution (in the form of milk of lime), which interacts with hydrogen chloride by the reaction 2HCl + CaCO 3 = CaCl 2 + H 2 O + CO 2 to a concentration of CaCl 2 in the solution of 32-35 wt.%.
Концентрация исходного раствора СаСl2 определяется параметрами процесса получения гидроксида магния на стадии отстоя, поэтому диапазон концентраций 10-20 мас.% взят в качестве определяющего для установления параметров предлагаемого способа.The concentration of the initial solution of CaCl 2 is determined by the parameters of the process for producing magnesium hydroxide at the sludge stage, therefore, the concentration range of 10-20 wt.% Is taken as determining for setting the parameters of the proposed method.
Абсорбция хлористого водорода происходит изотермически. При температуре больше 15°С невозможно достичь нужной концентрации хлористого водорода, при температуре меньше 10°С возможно выделение кристаллов хлорида кальция вместо получения истинного раствора.The absorption of hydrogen chloride is isothermal. At a temperature of more than 15 ° C, it is impossible to achieve the desired concentration of hydrogen chloride; at a temperature of less than 10 ° C, precipitation of calcium chloride crystals is possible instead of obtaining a true solution.
Концентрация хлористого водорода 22 мас.% является наименьшей возможной для получения минимально необходимой концентрации хлористого кальция. При концентрации НСl больше 25% в готовом продукте могут выпасть кристаллы вследствие снижения растворимости СаСl2 при снижении рН раствора.A concentration of hydrogen chloride of 22% by weight is the smallest possible to obtain the minimum required concentration of calcium chloride. When the concentration of Hcl is more than 25% in the finished product, crystals may precipitate due to a decrease in the solubility of CaCl 2 with a decrease in pH of the solution.
Концентрация хлористого кальция 32 мас.% является минимальной по требованиям ГОСТ 450-77, при повышении концентрации выше 35% может произойти выпадение кристаллов.The concentration of calcium chloride 32 wt.% Is the minimum according to the requirements of GOST 450-77, with an increase in concentration above 35%, crystals can precipitate.
ПРИМЕР. На первой стадии хлористый водород поступал в абсорбер, который орошали раствором с концентрацией хлористого кальция 15 мас.% при температуре 15°С.EXAMPLE. In the first stage, hydrogen chloride entered the absorber, which was irrigated with a solution with a concentration of calcium chloride of 15 wt.% At a temperature of 15 ° C.
В абсорбере происходило насыщение раствора СаСl2 хлористым водородом до концентрации 24 мас.%. Необходимая концентрация (не более равновесной), не допускающей выпадение в осадок кристаллогидратов CaCl2, обеспечивалась регулированием подачи на абсорбер либо раствора СаСl2, либо хлористого водорода. При 15°С равновесная концентрация хлорида кальция составляет 21,3 маc.%, хлористого водорода - 26,2 маc.%.In the absorber, a solution of CaCl 2 was saturated with hydrogen chloride to a concentration of 24 wt.%. The required concentration (no more than equilibrium), preventing the precipitation of CaCl 2 crystalline hydrates, was ensured by regulating the supply of either CaCl 2 solution or hydrogen chloride to the absorber. At 15 ° C, the equilibrium concentration of calcium chloride is 21.3 wt.%, Hydrogen chloride - 26.2 wt.%.
На второй стадии образовавшийся раствор хлористого водорода и хлористого кальция обработали известковым молоком, отделили осадки гидроокисей железа и магния и получили готовый продукт - раствор с концентрацией CaCl2 33 мас.% в соответствии с ГОСТ 450-77.At the second stage, the resulting solution of hydrogen chloride and calcium chloride was treated with milk of lime, the precipitates of iron and magnesium hydroxides were separated, and a finished product was obtained — a solution with a CaCl 2 concentration of 33 wt.% In accordance with GOST 450-77.
Равновесная концентрация CaCl2 в воде при 15°С составляет 41,2 маc.%.The equilibrium concentration of CaCl 2 in water at 15 ° C is 41.2 wt.%.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RU2004106519/15A RU2255045C1 (en) | 2004-03-05 | 2004-03-05 | Method for concentrating calcium chloride solution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RU2004106519/15A RU2255045C1 (en) | 2004-03-05 | 2004-03-05 | Method for concentrating calcium chloride solution |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| RU2255045C1 true RU2255045C1 (en) | 2005-06-27 |
Family
ID=35836587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| RU2004106519/15A RU2255045C1 (en) | 2004-03-05 | 2004-03-05 | Method for concentrating calcium chloride solution |
Country Status (1)
| Country | Link |
|---|---|
| RU (1) | RU2255045C1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2432319C1 (en) * | 2010-02-26 | 2011-10-27 | Закрытое акционерное общество "Северо-Западная компания "Карбон" | Method of producing purified calcium chloride solution |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4299809A (en) * | 1979-01-12 | 1981-11-10 | I.S.O. | Process for the manufacture of calcium chloride |
| US4704265A (en) * | 1986-08-15 | 1987-11-03 | The Dow Chemical Company | Process for the manufacture of calcium chloride |
| RU2200710C1 (en) * | 2002-06-07 | 2003-03-20 | Подопригора Валентин Петрович | Method for production of granulated calcium chloride |
-
2004
- 2004-03-05 RU RU2004106519/15A patent/RU2255045C1/en not_active IP Right Cessation
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4299809A (en) * | 1979-01-12 | 1981-11-10 | I.S.O. | Process for the manufacture of calcium chloride |
| US4704265A (en) * | 1986-08-15 | 1987-11-03 | The Dow Chemical Company | Process for the manufacture of calcium chloride |
| RU2200710C1 (en) * | 2002-06-07 | 2003-03-20 | Подопригора Валентин Петрович | Method for production of granulated calcium chloride |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2432319C1 (en) * | 2010-02-26 | 2011-10-27 | Закрытое акционерное общество "Северо-Западная компания "Карбон" | Method of producing purified calcium chloride solution |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8721999B2 (en) | Process for simultaneous production of potassium sulphate, ammonium sulfate, magnesium hydroxide and/or magnesium oxide from kainite mixed salt and ammonia | |
| SU1519528A3 (en) | Method of producing magnesium oxide from magnesite | |
| JP2018500261A (en) | Lithium hydroxide production | |
| EA027269B1 (en) | Recovery of carboxylic acid from its magnesium salts by precipitation using hydrochloric acid, useful for fermentation broth work-up | |
| RU2011137433A (en) | PRODUCTION OF PURIFIED CALCIUM CHLORIDE | |
| CN110002490A (en) | The method for producing copper sulphate as raw material using acid, alkaline etching liquid | |
| US4210626A (en) | Manufacture of magnesium carbonate and calcium sulphate from brine mud | |
| JP5315359B2 (en) | Method for producing calcium compound | |
| CN104261443A (en) | Process for calcium-method production of magnesium hydrate by using nanofiltration membrane | |
| KR20000068137A (en) | PROCESS FOR PRODUCING ANHYDROUS MgCl2 | |
| WO2017042832A1 (en) | Process for potash recovery from biomethanated spent wash with concomitant environmental remediation of effluent | |
| CN109354047A (en) | A method of preparing high-purity magnesium oxide | |
| JPS6236021A (en) | Production of calcium carbonate having low strontium content | |
| RU2255045C1 (en) | Method for concentrating calcium chloride solution | |
| CN107835798B (en) | Process for producing succinic acid | |
| RU2624326C1 (en) | Method of producing alumosilicious coagulant | |
| RU2259320C1 (en) | Magnesium-containing ore processing method | |
| JPH0316913A (en) | Production of high-purity sodium carbonate | |
| CN101318686A (en) | Method for producing calcium chloride dihydrate and calcium fluoride as byproduct | |
| RU2513652C2 (en) | Method of obtaining magnesium oxide | |
| RU2700070C1 (en) | Method of producing aluminum hydroxochlorosulphate | |
| JPS62227496A (en) | Method for treating waste water containing borofluoride and salts of fluorine | |
| RU2808413C1 (en) | Method for producing liquid glass | |
| RU2182115C2 (en) | Method of production of titanium dioxide | |
| CN102115104A (en) | Method for preparing magnesium nitrate anhydrous co-production calcium and manganese hydroxide with boron mud |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MM4A | The patent is invalid due to non-payment of fees |
Effective date: 20060306 |
|
| NF4A | Reinstatement of patent |
Effective date: 20080627 |
|
| MM4A | The patent is invalid due to non-payment of fees |
Effective date: 20100306 |