CN113860335A - Process for producing sodium bicarbonate by double decomposition - Google Patents
Process for producing sodium bicarbonate by double decomposition Download PDFInfo
- Publication number
- CN113860335A CN113860335A CN202111370868.7A CN202111370868A CN113860335A CN 113860335 A CN113860335 A CN 113860335A CN 202111370868 A CN202111370868 A CN 202111370868A CN 113860335 A CN113860335 A CN 113860335A
- Authority
- CN
- China
- Prior art keywords
- reaction tower
- baking soda
- carbon dioxide
- tower
- washing
- 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.)
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- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 title claims abstract description 74
- 235000017557 sodium bicarbonate Nutrition 0.000 title claims abstract description 37
- 229910000030 sodium bicarbonate Inorganic materials 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000000354 decomposition reaction Methods 0.000 title claims abstract description 11
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 52
- 238000006243 chemical reaction Methods 0.000 claims abstract description 45
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 28
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 27
- 238000005406 washing Methods 0.000 claims abstract description 24
- 239000007788 liquid Substances 0.000 claims abstract description 16
- 239000013078 crystal Substances 0.000 claims abstract description 13
- 239000002002 slurry Substances 0.000 claims abstract description 13
- 238000004519 manufacturing process Methods 0.000 claims abstract description 11
- 239000000706 filtrate Substances 0.000 claims abstract description 9
- 238000002156 mixing Methods 0.000 claims abstract description 9
- 239000012267 brine Substances 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 8
- 238000000926 separation method Methods 0.000 claims abstract description 8
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims abstract description 8
- 238000003756 stirring Methods 0.000 claims abstract description 7
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 claims abstract description 6
- 235000012538 ammonium bicarbonate Nutrition 0.000 claims abstract description 6
- 239000001099 ammonium carbonate Substances 0.000 claims abstract description 6
- 238000001914 filtration Methods 0.000 claims abstract description 6
- 239000000243 solution Substances 0.000 claims abstract description 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000001816 cooling Methods 0.000 claims abstract description 5
- 230000009615 deamination Effects 0.000 claims abstract description 5
- 238000006481 deamination reaction Methods 0.000 claims abstract description 5
- 238000007599 discharging Methods 0.000 claims abstract description 4
- 238000005649 metathesis reaction Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 238000005086 pumping Methods 0.000 claims description 3
- 239000002562 thickening agent Substances 0.000 claims description 3
- 238000004064 recycling Methods 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 description 4
- 239000003814 drug Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 241001131796 Botaurus stellaris Species 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000015895 biscuits Nutrition 0.000 description 1
- 235000008429 bread Nutrition 0.000 description 1
- 235000014121 butter Nutrition 0.000 description 1
- 235000014171 carbonated beverage Nutrition 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 235000009508 confectionery Nutrition 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 230000002335 preservative effect Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D7/00—Carbonates of sodium, potassium or alkali metals in general
- C01D7/02—Preparation by double decomposition
Abstract
A process method for producing baking soda by double decomposition relates to the technical field of baking soda production, and comprises the steps of (I) adding brine solution and ammonium bicarbonate into the upper part of a reaction tower, fully mixing, stirring and filtering to obtain a filtrate; (II) the filtrate falls down in the reaction tower, and reacts with the carbon dioxide gas introduced from the lower part of the reaction tower in a countercurrent manner, and baking soda crystal slurry is generated from the bottom of the reaction tower; thirdly, carrying out solid-liquid separation on the baking soda crystal slurry obtained in the second step; fourthly, mixing a part of carbon dioxide gas in the step II with ammonia gas, discharging the mixture from the top of the reaction tower (1), and recovering the mixture to a washing tower through a pipeline for cooling and deamination; and (V) introducing the carbon dioxide treated by the washing tower in the step (IV) into a carbon dioxide compressor, and returning to the step (II) after boosting. The invention can recycle CO discharged from the reaction tower2Gas and resource saving.
Description
Technical Field
The invention relates to the technical field, in particular to a technical method for producing baking soda by double decomposition.
Background
Baking soda is the commercial name for refined sodium bicarbonate and is an important alkali product. Baking soda is widely used in the food industry as a bulking or expanding agent for the production of various biscuit, bread and confectionery products; a generating agent for carbon dioxide in carbonated drinks and a preservative for butter; the cleaning agent is used for cleaning surfaces of airplanes, circuit boards, teeth and the like; are used in medicine for the manufacture of various drugs and medicaments. It is also widely used in the industries of ore dressing, smelting, metal heat treatment, tanning, dye, fiber, rubber, foamed plastic, metal sodium manufacture, detergent, personal care products, foam extinguishing agent, dry powder extinguishing agent and the like.
The production methods of baking soda are mainly divided into two methods: one is to prepare sodium bicarbonate by double decomposition of natural bittern and ammonium bicarbonate, and the other is to prepare sodium bicarbonate by carbonation of sodium carbonate solution. The process of preparing baking soda by the double decomposition method comprises the working procedures of brine refining, double decomposition reaction, filtering and washing of baking soda, drying and packaging of baking soda, deamination of baking soda filtrate, salt preparation by evaporation, ammonium chloride preparation by cooling and the like. During the metathesis reaction, CO2The gas is needed for reaction, one part of the gas is absorbed, the other part of the gas is mixed with ammonia gas and is discharged from the top of the reaction tower as tail gas, certain waste is caused, and certain cost is consumed for tail gas treatment.
Disclosure of Invention
The invention aims to provide a process method for producing baking soda by double decomposition so as to recycle CO discharged by a reaction tower2Gas and resource saving.
In order to solve the technical problems, the invention adopts the following technical scheme: a process for the production of baking soda by metathesis, which comprises the following steps:
adding brine solution and ammonium bicarbonate into the upper part of a reaction tower, fully mixing, stirring and filtering to obtain a filtrate.
And (II) the filtrate falls down in the reaction tower, and reacts with the carbon dioxide gas introduced from the lower part of the reaction tower in a countercurrent manner, and baking soda crystal slurry is generated from the bottom of the reaction tower.
And (III) carrying out solid-liquid separation on the baking soda crystal slurry obtained in the step (II).
And (IV) mixing a part of the carbon dioxide gas in the step (II) with ammonia gas, discharging the mixture from the top of the reaction tower (1), and then recovering the mixture to a washing tower through a pipeline for cooling and deamination.
And (V) introducing the carbon dioxide treated by the washing tower in the step (IV) into a carbon dioxide compressor, and returning to the step (II) after boosting.
Preferably, in step (iv), the washing liquid is withdrawn from the bottom of the washing column by a washing liquid circulation pump and transferred to the top of the washing column.
More preferably, in the step (three), the baking soda crystal slurry is conveyed to a thickener from the bottom of the reaction tower through a material pumping pump for solid-liquid separation.
The invention has the beneficial effects that: the carbon dioxide discharged from the reaction tower is recycled and deaminated, and then the pressure of the carbon dioxide compressor is increased to return the carbon dioxide to the lower part of the reaction tower for continuous reaction, so that the recycling of the carbon dioxide is realized, and the resources are saved to a great extent.
Drawings
Fig. 1 is a schematic view of a flow structure in an embodiment of the present invention.
The reference signs are:
1-reaction tower 2-washing tower 3-carbon dioxide compressor
4-washing liquid circulating pump 5-material-beating pump.
Detailed Description
In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention.
It should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are used broadly in the present invention, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Further, in the present invention, unless otherwise expressly specified or limited, the first feature "on" or "under" the second feature may comprise the first and second features being in direct contact, or may comprise the first and second features being in contact, not in direct contact, but via another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature. The terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the invention.
As shown in fig. 1, a process for producing baking soda by metathesis comprises the following steps:
adding brine solution and ammonium bicarbonate into the upper part of the reaction tower 1, fully mixing, stirring and filtering to obtain filtrate.
And (II) enabling the filtrate to fall down in the reaction tower 1, carrying out counter-current reaction with carbon dioxide gas introduced from the lower part of the reaction tower 1, and generating baking soda crystal slurry from the bottom of the reaction tower 1.
And (III) carrying out solid-liquid separation on the baking soda crystal slurry obtained in the step (II).
And (IV) mixing a part of the carbon dioxide gas in the step (II) with ammonia gas, discharging the mixture from the top of the reaction tower 1, and then recovering the mixture to a washing tower 2 through a pipeline for cooling and deamination.
And (V) introducing the carbon dioxide treated by the washing tower 2 in the step (IV) into a carbon dioxide compressor 3, boosting the pressure and returning to the step (II).
In the process of producing baking soda by double decomposition provided by the embodiment, in the practical application process, the brine solution and the ammonium bicarbonate are fully mixed and stirred at the upper part of the reaction tower 1, a motor arranged at the top of the reaction tower 1 can be used for connecting a rotating shaft, the rotating shaft extends into the upper part of the reaction tower 1 to drive stirring blades to rotate so as to realize mixing and stirring, the filtering realized after stirring can be realized by arranging a mesh filter plate in the reaction tower 1, fine particle filtered substances passing through the mesh filter plate fall downwards in the reaction tower 1 and can react with carbon dioxide gas introduced at the lower part of the reaction tower 1 in a countercurrent manner, so that baking soda crystal slurry is produced at the bottom of the reaction tower 1, and finally, the obtained baking soda crystal slurry material is subjected to solid-liquid separation so as to obtain the baking soda required by the invention. In the process of producing baking soda by double decomposition, carbon dioxide discharged from the reaction tower 1 is recovered and deaminated, and then the pressure of the carbon dioxide is increased by the carbon dioxide compressor 3 to return to the lower part of the reaction tower 1 for continuous reaction, so that the carbon dioxide is recycled, and resources are saved to a great extent.
Preferably, in the step (four), the washing liquid is extracted from the bottom of the washing tower by the washing liquid circulating pump 4 and is conveyed to the top of the washing tower 2, so that the washing liquid is fully utilized, and the cost is saved.
In the step (one) of this embodiment, a recycled brine inlet may be further provided at the upper part of the reaction tower 1 for allowing the recycled brine to enter the reaction tower 1 for reaction.
In addition, in the step (three), the baking soda crystal slurry can be conveyed to a thickener from the bottom of the reaction tower (1) through a material pumping pump 5 for solid-liquid separation.
The above embodiments are preferred implementations of the present invention, and the present invention can be implemented in other ways without departing from the spirit of the present invention.
Some of the drawings and descriptions of the present invention have been simplified to facilitate the understanding of the improvements over the prior art by those skilled in the art, and some other elements have been omitted from this document for the sake of clarity, and it should be appreciated by those skilled in the art that such omitted elements may also constitute the subject matter of the present invention.
Claims (3)
1. A process for producing baking soda by double decomposition is characterized by comprising the following steps:
adding brine solution and ammonium bicarbonate into the upper part of a reaction tower (1), fully mixing, stirring and filtering to obtain a filtrate;
(II) the filtrate falls down in the reaction tower (1), and reacts with the carbon dioxide gas introduced from the lower part of the reaction tower (1) in a countercurrent way, and baking soda crystal slurry is generated from the bottom of the reaction tower (1);
thirdly, carrying out solid-liquid separation on the baking soda crystal slurry obtained in the second step;
fourthly, mixing a part of carbon dioxide gas in the second step with ammonia gas, discharging the mixture from the top of the reaction tower (1), and recycling the mixture to a washing tower (2) through a pipeline for cooling and deamination;
and (V) introducing the carbon dioxide treated by the washing tower (2) in the step (IV) into a carbon dioxide compressor (3), boosting the pressure and returning to the step (II).
2. A process for the production of baking soda from metathesis as claimed in claim 1, characterized in that: in the fourth step, the washing liquid is drawn from the bottom of the washing tower by the washing liquid circulation pump (4) and sent to the top of the washing tower (2).
3. A process for the production of baking soda from metathesis as claimed in claim 2, characterized in that: in the third step, the baking soda crystal slurry is conveyed from the bottom of the reaction tower (1) to a thickener by a material pumping pump (5) for solid-liquid separation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111370868.7A CN113860335A (en) | 2021-11-18 | 2021-11-18 | Process for producing sodium bicarbonate by double decomposition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111370868.7A CN113860335A (en) | 2021-11-18 | 2021-11-18 | Process for producing sodium bicarbonate by double decomposition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113860335A true CN113860335A (en) | 2021-12-31 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111370868.7A Pending CN113860335A (en) | 2021-11-18 | 2021-11-18 | Process for producing sodium bicarbonate by double decomposition |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101185484A (en) * | 2007-11-08 | 2008-05-28 | 衡阳市海联盐卤化工有限公司 | Production process of continuous program controlled double decomposition reaction foodstuff level baking soda |
| CN102107889A (en) * | 2011-01-21 | 2011-06-29 | 刘松林 | Method for treating ammonium chloride in sodium bicarbonate mother solution at normal temperature |
| CN107934996A (en) * | 2017-12-20 | 2018-04-20 | 中昊(大连)化工研究设计院有限公司 | A kind of technique using triamine End gas production sodium bicarbonate and ammonium chloride |
| EP3369707A1 (en) * | 2017-02-21 | 2018-09-05 | CIECH R&D Sp. z o.o. | Process of manufacturing sodium carbonate integrated with uptaking carbon dioxide by ammonia process |
| CN109650408A (en) * | 2018-12-08 | 2019-04-19 | 李东田 | A kind of drying means of ammonium hydrogen carbonate |
| CN209685326U (en) * | 2019-03-25 | 2019-11-26 | 湖南裕华科技集团股份有限公司 | It is a kind of for handling the recyclable device of ammonia still process tail gas |
-
2021
- 2021-11-18 CN CN202111370868.7A patent/CN113860335A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101185484A (en) * | 2007-11-08 | 2008-05-28 | 衡阳市海联盐卤化工有限公司 | Production process of continuous program controlled double decomposition reaction foodstuff level baking soda |
| CN102107889A (en) * | 2011-01-21 | 2011-06-29 | 刘松林 | Method for treating ammonium chloride in sodium bicarbonate mother solution at normal temperature |
| EP3369707A1 (en) * | 2017-02-21 | 2018-09-05 | CIECH R&D Sp. z o.o. | Process of manufacturing sodium carbonate integrated with uptaking carbon dioxide by ammonia process |
| CN107934996A (en) * | 2017-12-20 | 2018-04-20 | 中昊(大连)化工研究设计院有限公司 | A kind of technique using triamine End gas production sodium bicarbonate and ammonium chloride |
| CN109650408A (en) * | 2018-12-08 | 2019-04-19 | 李东田 | A kind of drying means of ammonium hydrogen carbonate |
| CN209685326U (en) * | 2019-03-25 | 2019-11-26 | 湖南裕华科技集团股份有限公司 | It is a kind of for handling the recyclable device of ammonia still process tail gas |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211231 |
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