CN113135582A - Production method for jointly preparing sodium carbonate and ammonium chloride by using sodium chloride - Google Patents
Production method for jointly preparing sodium carbonate and ammonium chloride by using sodium chloride Download PDFInfo
- Publication number
- CN113135582A CN113135582A CN202110355387.2A CN202110355387A CN113135582A CN 113135582 A CN113135582 A CN 113135582A CN 202110355387 A CN202110355387 A CN 202110355387A CN 113135582 A CN113135582 A CN 113135582A
- Authority
- CN
- China
- Prior art keywords
- ammonium chloride
- sodium
- chloride
- sodium chloride
- sodium carbonate
- 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.)
- Pending
Links
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
- C01D7/16—Preparation from compounds of sodium or potassium with amines and carbon dioxide
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/16—Halides of ammonium
- C01C1/164—Ammonium chloride
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/141—Feedstock
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention belongs to the technical field of secondary utilization of sodium carbonate and resources, and particularly provides a production method for jointly preparing sodium carbonate and ammonium chloride by using sodium chloride. The single-pass conversion rate of the sodium chloride is improved by more than 80 percent; the total conversion of sodium chloride is over 95%; the total conversion rate of ammonia is more than 98%, the yield of sodium carbonate is more than 90%, and the yield of ammonium chloride is more than 90%, so that the circulating material is reduced by more than 80%, the energy consumption is greatly reduced, the economic benefit is improved, and the method is environment-friendly. The method has the other advantages that the quality and the purity of the sodium carbonate and the ammonium chloride are high.
Description
Technical Field
The invention belongs to the technical field of secondary utilization of sodium carbonate and resources, and particularly relates to a production method for jointly preparing sodium carbonate and ammonium chloride by using sodium chloride.
Background
With the rapid development of chemical industry, the discharge amount of high-salinity wastewater containing sodium chloride is larger and larger, and the harm to the ecological environment is larger. The conventional treatment method is to evaporate and crystallize the high-salinity wastewater and concentrate the salt in the wastewater.
Sodium bicarbonate is an important chemical raw material and is widely applied to the industries of pharmacy, food, rubber, plastics and the like. The production process of the sodium bicarbonate mainly comprises the following steps: soda ash carbonization using sodium carbonate and carbon dioxide as raw materials; extracting with trona; sodium chloride and ammonia gas, carbon dioxide or ammonium bicarbonate are used as raw materials to produce sodium bicarbonate and ammonium chloride.
The reaction equation for producing sodium bicarbonate and ammonium chloride by using sodium chloride, ammonia gas and carbon dioxide as raw materials is as follows:
NH3+CO2→NH4HCO3
NH4HCO3+NaCl→NaHCO3+NH4Cl
chinese patent CN111039310A discloses a method for preparing sodium bicarbonate and ammonium sulfate from sodium sulfate, which utilizes sodium sulfate and ammonium bicarbonate to prepare sodium bicarbonate and ammonium sulfate under the action of an accelerator. The method can realize the utilization rate of the sodium sulfate to be more than 85 percent, but because the accelerator is used, other ions except sulfate ions are introduced, so that more impurities are contained in the obtained product.
Chinese patent CN110304640A discloses a method for preparing sodium bicarbonate and ammonium chloride by using sodium chloride and ammonium bicarbonate, which realizes that the production yield of sodium bicarbonate is increased by 10% -15%, but the electrodialysis device is used, so that the device has many parts and higher assembly requirement; when the dissociation degree of water in the electrodialysis equipment is increased, polarization scaling and neutral disturbance phenomena are easy to generate; the electroosmosis water treatment has high requirements on raw water purification, and precise filtration equipment needs to be added.
Disclosure of Invention
In order to overcome the problems in the prior art, the invention provides a production method for jointly preparing sodium carbonate and ammonium chloride by using sodium chloride.
In order to realize the purpose of the invention, the adopted technical scheme is as follows: a production method for jointly preparing sodium carbonate and ammonium chloride by using sodium chloride comprises the following steps:
(1) evaporating and concentrating the high-salt wastewater, dissolving the high-salt wastewater by high-purity water ultrasound to prepare a sodium chloride aqueous solution in a supersaturated state, conveying the saturated sodium chloride aqueous solution into an ammoniation tower, continuously introducing ammonia gas into the ammoniation tower to carry out heterogeneous absorption, and carrying out ammoniation treatment to convert an absorption liquid into ammonium high-salt wastewater; conveying the ammonium high-salinity wastewater into a carbonization tower, and continuously introducing carbon dioxide gas into the carbonization tower for carbonization treatment to obtain a mixed solution containing bicarbonate;
(2) crystallizing, filtering and washing the mixed solution containing the bicarbonate to obtain a sodium bicarbonate crude product, and calcining at high temperature to obtain a sodium carbonate product; carbon dioxide gas after the sodium carbonate calcination is collected and circularly applied to the carbonization tower;
(3) the filtered mother liquor is an aqueous solution containing ammonium chloride and sodium chloride, and is crystallized at low temperature and chemically sublimated to separate out an ammonium chloride crude product which is further refined into an ammonium chloride product through recrystallization, so that the impurity content of the sodium chloride in the ammonium chloride product is reduced to below 2 percent; collecting ammonia gas released after ammonium chloride crystallization and chemical sublimation in the step (3), and circularly applying the ammonia gas to the ammoniation tower; the residual liquid after low-temperature crystallization and recrystallization in the step (3) is an aqueous solution dissolved with sodium chloride and ammonium chloride, and is circularly applied to the carbonization tower;
the ammoniation treatment conditions are as follows: controlling the mass concentration of a NaCl aqueous solution to be 30-50%, controlling the molar ratio of ammonia gas to sodium chloride to be 1.0-2.0: 1, controlling the ammoniation reaction temperature to be 30-50 ℃, controlling the ammoniation reaction time to be 0.5-1 h and controlling the pressure to be 0.1-0.5 MPa;
the carbonization treatment conditions are as follows: the molar ratio of the carbon dioxide gas to the sodium chloride is 1.0-1.5: 1, the carbonization reaction temperature is 20-45 ℃, the carbonization reaction time is 0.5-1 h, and the pressure is 0.1-0.5 MP.
Further, in the step (2), the crystallization temperature is controlled to be 55-85 ℃, the sodium carbonate calcination temperature is controlled to be 200-280 ℃, and the calcination time is controlled to be 0.5-1 h. In the step (2), the crystallization temperature is further optimized to be 65-70 ℃, so that the purity of the sodium carbonate product is more than 98%.
Furthermore, the low-temperature crystallization temperature in the step (3) is controlled to be 10-30 ℃, and is further preferably 15-20 ℃, so that the purity of the ammonium chloride product is more than 99%.
Compared with the prior art, the method for producing sodium carbonate and ammonium chloride by using sodium chloride as a raw material has the following technical advantages: the single-pass conversion rate of the sodium chloride is improved by more than 80 percent; the total conversion of sodium chloride is over 95%; the total conversion rate of ammonia is more than 98%, the yield of sodium carbonate is more than 90%, and the yield of ammonium chloride is more than 90%, so that the circulating material is reduced by more than 80%, the energy consumption is greatly reduced, the economic benefit is improved, and the method is environment-friendly. The method has the other advantages that the quality and the purity of the sodium carbonate and the ammonium chloride are high.
Drawings
FIG. 1 is a process flow diagram of the present invention for the production of sodium carbonate and ammonium chloride by the combination of sodium chloride.
Detailed Description
The present invention is not limited to the following embodiments, and those skilled in the art can implement the present invention in other embodiments according to the disclosure of the present invention, or make simple changes or modifications on the design structure and idea of the present invention, and fall into the protection scope of the present invention. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The technical solutions in the embodiments of the present invention are further described below with reference to specific embodiments.
The invention provides a method for preparing sodium carbonate and sodium chloride by using sodium chloride, a specific process flow is shown in figure 1, and the method comprises the following steps:
(1) the sodium chloride solution reacts with ammonium bicarbonate or a mixture of carbon dioxide and ammonia gas, the ammoniation reaction and the carbonization reaction are carried out under a two-stage series continuous reaction process, and a sodium bicarbonate product and a sodium bicarbonate washing solution are obtained after solid-liquid separation and washing of liquid after the reaction.
(2) And (2) calcining the sodium bicarbonate crude product obtained in the step (1) at high temperature to obtain a sodium carbonate product, and circulating the recovered carbon dioxide and water vapor to the reaction in the step (1).
(3) And (3) crystallizing the mother liquor obtained in the step (2) at low temperature to obtain ammonium chloride and crystallized mother liquor, and returning the mother liquor to the step (1) to realize circular production.
Example 1
A method for preparing sodium carbonate and ammonium chloride by using sodium chloride comprises the following steps:
(1) evaporating and concentrating the high-salinity wastewater, dissolving the high-salinity wastewater with high-purity water by ultrasonic to prepare a supersaturated sodium chloride aqueous solution, wherein the mass concentration of NaCl is 30%, continuously introducing ammonia gas into an ammoniation tower for heterogeneous absorption, wherein the molar ratio of the ammonia gas to the NaCl is 1:1, the ammoniation reaction temperature is 30 ℃, the ammoniation time is 0.5h, and the reaction pressure is 0.1MPa, so that the absorption liquid is converted into the ammoniated high-salinity wastewater.
(2) Flowing the ammonium high-salt wastewater in the step (1) into a carbonization tower through a pump, and continuously introducing carbon dioxide gas into the carbonization tower to carry out carbonization treatment, wherein the molar ratio of carbon dioxide to NaCl in the carbonization reaction is 1.:1, the carbonization reaction temperature is 20 ℃, the carbonization time is 0.5h, and the reaction pressure is 0.1 MPa;
(3) generating bicarbonate through carbonation reaction, and separating out sodium bicarbonate crystals at the crystallization temperature of 55 ℃; calcining sodium bicarbonate crystals at the temperature of 200 ℃ for 0.5h to obtain a sodium carbonate product, and collecting generated carbon dioxide gas for recycling;
(4) the filtered mother liquor is an aqueous solution containing ammonium chloride and sodium chloride, and a crude ammonium chloride product is separated out through low-temperature crystallization and chemical sublimation, wherein the crystallization temperature is 10 ℃. And further refining the ammonium chloride product through recrystallization to reduce the impurity content of sodium chloride in the ammonium chloride product to below 2 percent, and collecting the released ammonia gas for recycling. The yield of sodium carbonate in the product prepared by the embodiment is 90.0%, the yield of ammonium chloride is 90.0%, the purity of sodium carbonate is 98.0%, the purity of ammonium chloride is 99.2%, and the utilization rate of sodium chloride is 90%.
Example 2
A method for preparing sodium carbonate and ammonium chloride by using sodium chloride comprises the following steps:
(1) evaporating and concentrating the high-salinity wastewater, dissolving the high-salinity wastewater with high-purity water by ultrasonic to prepare a supersaturated sodium chloride aqueous solution, wherein the mass concentration of NaCl is 40%, continuously introducing ammonia gas into an ammoniation tower for heterogeneous absorption, wherein the molar ratio of the ammonia gas to the NaCl is 1.5:1, the ammoniation reaction temperature is 40 ℃, the ammoniation time is 1h, and the reaction pressure is 0.3MPa, so that the absorption liquid is converted into the ammoniated high-salinity wastewater.
(2) Allowing the ammonium high-salinity wastewater in the step (1) to flow into a carbonization tower through a pump, and continuously introducing carbon dioxide gas into the carbonization tower to perform carbonization treatment, wherein the molar ratio of carbon dioxide to NaCl in the carbonization reaction is 1.3:1, the carbonization reaction temperature is 35 ℃, the carbonization time is 1h, and the reaction pressure is 0.3 MPa;
(3) generating bicarbonate through carbonation reaction, and separating out sodium bicarbonate crystals at a crystallization temperature of 65 ℃; calcining sodium bicarbonate crystals at 230 ℃ for 1h to obtain a sodium carbonate product, and collecting generated carbon dioxide gas for recycling;
(4) the filtered mother liquor is an aqueous solution containing ammonium chloride and sodium chloride, and a crude ammonium chloride product is separated out through low-temperature crystallization and chemical sublimation, wherein the crystallization temperature is 20 ℃. And further refining the ammonium chloride product through recrystallization to reduce the impurity content of sodium chloride in the ammonium chloride product to below 2 percent, and collecting the released ammonia gas for recycling.
The yield of sodium carbonate in the product prepared by the embodiment is 91.5%, the yield of ammonium chloride is 93.2%, the purity of sodium carbonate is 98.2%, the purity of ammonium chloride is 99.4%, and the utilization rate of sodium chloride is 95%.
Example 3
A method for preparing sodium carbonate and ammonium chloride by using sodium chloride comprises the following steps:
(1) evaporating and concentrating the high-salinity wastewater, dissolving the high-salinity wastewater with high-purity water by ultrasonic to prepare a supersaturated sodium chloride aqueous solution, wherein the mass concentration of NaCl is 50%, continuously introducing ammonia gas into an ammoniation tower for heterogeneous absorption, wherein the molar ratio of the ammonia gas to the NaCl is 2:1, the ammoniation reaction temperature is 50 ℃, the ammoniation time is 1h, and the reaction pressure is 0.5MPa, so that the absorption liquid is converted into the ammoniated high-salinity wastewater.
(2) Allowing the ammonium high-salinity wastewater in the step (1) to flow into a carbonization tower through a pump, and continuously introducing carbon dioxide gas into the carbonization tower to perform carbonization treatment, wherein the molar ratio of carbon dioxide to NaCl in the carbonization reaction is 1.5:1, the carbonization reaction temperature is 45 ℃, the carbonization time is 1h, and the reaction pressure is 0.5 MPa;
(3) generating bicarbonate through carbonation reaction, and separating out sodium bicarbonate crystals at the crystallization temperature of 75 ℃; calcining sodium bicarbonate crystals at the temperature of 250 ℃ for 1h to obtain a sodium carbonate product, and collecting generated carbon dioxide gas for recycling;
(4) the filtered mother liquor is an aqueous solution containing ammonium chloride and sodium chloride, and a crude ammonium chloride product is separated out through low-temperature crystallization and chemical sublimation, wherein the crystallization temperature is 30 ℃. And further refining the ammonium chloride product through recrystallization to reduce the impurity content of sodium chloride in the ammonium chloride product to below 2 percent, and collecting the released ammonia gas for recycling.
The yield of sodium carbonate in the product prepared by the embodiment is 92.2%, the yield of ammonium chloride is 92.0%, the purity of sodium carbonate is 98.6%, the purity of ammonium chloride is 99.5%, and the utilization rate of sodium chloride is 94%.
Example 4
A method for preparing sodium carbonate and ammonium chloride by using sodium chloride comprises the following steps:
(1) evaporating and concentrating the high-salinity wastewater, dissolving the high-salinity wastewater with high-purity water by ultrasonic to prepare a supersaturated sodium chloride aqueous solution, wherein the mass concentration of NaCl is 50%, continuously introducing ammonia gas into an ammoniation tower for heterogeneous absorption, wherein the molar ratio of the ammonia gas to the NaCl is 2.0:1, the ammoniation reaction temperature is 50 ℃, the ammoniation time is 1h, and the reaction pressure is 0.5MPa, so that the absorption liquid is converted into the ammoniated high-salinity wastewater.
(2) Allowing the ammonium high-salinity wastewater in the step (1) to flow into a carbonization tower through a pump, and continuously introducing carbon dioxide gas into the carbonization tower to perform carbonization treatment, wherein the molar ratio of carbon dioxide to NaCl in the carbonization reaction is 1.5:1, the carbonization reaction temperature is 45 ℃, the carbonization time is 1h, and the reaction pressure is 0.5 MPa;
(3) generating bicarbonate through carbonation reaction, and separating out sodium bicarbonate crystals at the crystallization temperature of 85 ℃; calcining sodium bicarbonate crystals at 280 ℃ for 1h to obtain a sodium carbonate product, and collecting generated carbon dioxide gas for recycling;
(4) the filtered mother liquor is an aqueous solution containing ammonium chloride and sodium chloride, and a crude ammonium chloride product is separated out through low-temperature crystallization and chemical sublimation, wherein the crystallization temperature is 20 ℃. And further refining the ammonium chloride product through recrystallization to reduce the impurity content of sodium chloride in the ammonium chloride product to below 2 percent, and collecting the released ammonia gas for recycling.
The yield of sodium carbonate in the product prepared by the embodiment is 91.8%, the yield of ammonium chloride is 93.8%, the purity of sodium bicarbonate is 98.8%, the purity of ammonium chloride is 99.8%, and the utilization rate of sodium chloride is 95%.
In addition, the applicant also carries out single-factor tests respectively aiming at the ammoniation treatment conditions and the carbonization treatment conditions, and the test results show that when the ammoniation treatment conditions are as follows: controlling the mass concentration of a NaCl aqueous solution to be 30-50%, controlling the molar ratio of ammonia gas to sodium chloride to be 1.0-2.0: 1, controlling the ammoniation reaction temperature to be 30-50 ℃, controlling the ammoniation reaction time to be 0.5-1 h and controlling the pressure to be 0.1-0.5 MPa; meanwhile, the carbonization treatment conditions are as follows: the molar ratio of carbon dioxide gas to sodium chloride is 1.0-1.5: 1, the carbonization reaction temperature is 20-45 ℃, the carbonization reaction time is 0.5-1 h, and the pressure is 0.1-0.5 MP, so that the single-pass conversion rate of sodium chloride can be improved by more than 80%, the total conversion rate of sodium chloride is over 95%, the total conversion rate of ammonia is over 98%, the yield of sodium carbonate is over 90%, the yield of ammonium chloride is over 90%, and the circulating material is reduced by more than 80%.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and their concepts should be equivalent or changed within the technical scope of the present invention.
Claims (5)
1. A production method for jointly preparing sodium carbonate and ammonium chloride by using sodium chloride is characterized by comprising the following steps:
(1) evaporating and concentrating the high-salt wastewater, dissolving the high-salt wastewater by high-purity water ultrasound to prepare a sodium chloride aqueous solution in a supersaturated state, conveying the saturated sodium chloride aqueous solution into an ammoniation tower, continuously introducing ammonia gas into the ammoniation tower to carry out heterogeneous absorption, and carrying out ammoniation treatment to convert an absorption liquid into ammonium high-salt wastewater; conveying the ammonium high-salinity wastewater into a carbonization tower, and continuously introducing carbon dioxide gas into the carbonization tower for carbonization treatment to obtain a mixed solution containing bicarbonate;
(2) crystallizing, filtering and washing the mixed solution containing the bicarbonate to obtain a sodium bicarbonate crude product, and calcining at high temperature to obtain a sodium carbonate product; carbon dioxide gas after the sodium carbonate calcination is collected and circularly applied to the carbonization tower;
(3) the filtered mother liquor is an aqueous solution containing ammonium chloride and sodium chloride, and is crystallized at low temperature and chemically sublimated to separate out an ammonium chloride crude product which is further refined into an ammonium chloride product through recrystallization, so that the impurity content of the sodium chloride in the ammonium chloride product is reduced to below 2 percent; collecting ammonia gas released after ammonium chloride crystallization and chemical sublimation in the step (3), and circularly applying the ammonia gas to the ammoniation tower; the residual liquid after low-temperature crystallization and recrystallization in the step (3) is an aqueous solution dissolved with sodium chloride and ammonium chloride, and is circularly applied to the carbonization tower;
the ammoniation treatment conditions are as follows: controlling the mass concentration of a NaCl aqueous solution to be 30-50%, controlling the molar ratio of ammonia gas to sodium chloride to be 1.0-2.0: 1, controlling the ammoniation reaction temperature to be 30-50 ℃, controlling the ammoniation reaction time to be 0.5-1 h and controlling the pressure to be 0.1-0.5 MPa;
the carbonization treatment conditions are as follows: the molar ratio of the carbon dioxide gas to the sodium chloride is 1.0-1.5: 1, the carbonization reaction temperature is 20-45 ℃, the carbonization reaction time is 0.5-1 h, and the pressure is 0.1-0.5 MP.
2. The production method for jointly preparing sodium carbonate and ammonium chloride by using sodium chloride as claimed in claim 1, wherein the crystallization temperature in the step (2) is controlled to be 55-85 ℃, the calcination temperature of the sodium carbonate is controlled to be 200-280 ℃, and the calcination time is controlled to be 0.5-1 h.
3. The production method for jointly preparing sodium carbonate and ammonium chloride by using sodium chloride according to claim 2, wherein the crystallization temperature in the step (2) is controlled to be 65-70 ℃.
4. The production method for jointly preparing sodium carbonate and ammonium chloride by using sodium chloride according to claim 1, wherein the low-temperature crystallization temperature in the step (3) is controlled to be 10-30 ℃.
5. The production method for jointly preparing sodium carbonate and ammonium chloride by using sodium chloride according to claim 4, wherein the low-temperature crystallization temperature in the step (3) is controlled to be 15-20 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110355387.2A CN113135582A (en) | 2021-04-01 | 2021-04-01 | Production method for jointly preparing sodium carbonate and ammonium chloride by using sodium chloride |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110355387.2A CN113135582A (en) | 2021-04-01 | 2021-04-01 | Production method for jointly preparing sodium carbonate and ammonium chloride by using sodium chloride |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113135582A true CN113135582A (en) | 2021-07-20 |
Family
ID=76810356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110355387.2A Pending CN113135582A (en) | 2021-04-01 | 2021-04-01 | Production method for jointly preparing sodium carbonate and ammonium chloride by using sodium chloride |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113135582A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113860622A (en) * | 2021-11-19 | 2021-12-31 | 中煤能源研究院有限责任公司 | Reverse osmosis strong brine recycling system and method |
| CN114380306A (en) * | 2022-02-17 | 2022-04-22 | 常州大学 | Method for continuously producing sodium sulfate and ammonium chloride by using microreactor |
| CN114477230A (en) * | 2022-02-17 | 2022-05-13 | 常州大学 | Method for separating alkali salt through chemical sublimation-temperature-changing crystallization in Hou's combined alkali preparation |
| CN114538471A (en) * | 2022-01-13 | 2022-05-27 | 宁波弗镁瑞环保科技有限公司 | Method for comprehensively utilizing sodium sulfate-sodium chloride mixed salt |
| CN115490384A (en) * | 2022-10-09 | 2022-12-20 | 四川树霖科技集团有限公司 | Gas field water and waste salt comprehensive utilization combined alkali preparation method |
| CN115583660A (en) * | 2022-12-05 | 2023-01-10 | 鲁西化工集团股份有限公司氯碱化工分公司 | Device and method for preparing sodium carbonate and sodium chloride from byproduct salt |
| CN115739204A (en) * | 2022-11-15 | 2023-03-07 | 万华化学（宁波）有限公司 | Ion exchanger, preparation method thereof and method for resource utilization of waste brine |
| CN115872417A (en) * | 2023-03-08 | 2023-03-31 | 北京赛科康仑环保科技有限公司 | Bipolar membrane reinforced sodium chloride alkali preparation method |
| CN116730447A (en) * | 2023-08-08 | 2023-09-12 | 杭州匠容道环境科技有限公司 | Method and equipment for recycling fly ash water washing liquid |
| CN117446829A (en) * | 2023-12-25 | 2024-01-26 | 中国科学院过程工程研究所 | Method for preparing sodium carbonate and ammonium chloride by using short process of sodium chloride waste salt |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1114636A (en) * | 1995-02-20 | 1996-01-10 | 李永 | Process for preparation of soda ash by using bittern method |
| CN102531001A (en) * | 2011-12-27 | 2012-07-04 | 广东大众农业科技股份有限公司 | Comprehensive soda ash producing process and product application thereof |
| CN106673020A (en) * | 2015-11-05 | 2017-05-17 | 神华集团有限责任公司 | Method for co-producing sodium carbonate and ammonium chloride by utilizing salt-containing wastewater |
| CN106865579A (en) * | 2017-02-16 | 2017-06-20 | 中国中轻国际工程有限公司 | Well ore deposit sea lake salt bittern thermal cycling method ammonia integrated soda production |
| CN108046291A (en) * | 2017-12-29 | 2018-05-18 | 黄河三角洲京博化工研究院有限公司 | The recycling of by-product ammonium chloride and recycling in a kind of kresoxim-methyl production process |
| CN110589857A (en) * | 2019-10-29 | 2019-12-20 | 常州大学 | Method for preparing alkali by using waste salt in combination manner |
| CN108529652B (en) * | 2018-04-16 | 2020-05-12 | 黄河三角洲京博化工研究院有限公司 | Resource utilization process of industrial sodium chloride |
-
2021
- 2021-04-01 CN CN202110355387.2A patent/CN113135582A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1114636A (en) * | 1995-02-20 | 1996-01-10 | 李永 | Process for preparation of soda ash by using bittern method |
| CN102531001A (en) * | 2011-12-27 | 2012-07-04 | 广东大众农业科技股份有限公司 | Comprehensive soda ash producing process and product application thereof |
| CN106673020A (en) * | 2015-11-05 | 2017-05-17 | 神华集团有限责任公司 | Method for co-producing sodium carbonate and ammonium chloride by utilizing salt-containing wastewater |
| CN106865579A (en) * | 2017-02-16 | 2017-06-20 | 中国中轻国际工程有限公司 | Well ore deposit sea lake salt bittern thermal cycling method ammonia integrated soda production |
| CN108046291A (en) * | 2017-12-29 | 2018-05-18 | 黄河三角洲京博化工研究院有限公司 | The recycling of by-product ammonium chloride and recycling in a kind of kresoxim-methyl production process |
| CN108529652B (en) * | 2018-04-16 | 2020-05-12 | 黄河三角洲京博化工研究院有限公司 | Resource utilization process of industrial sodium chloride |
| CN110589857A (en) * | 2019-10-29 | 2019-12-20 | 常州大学 | Method for preparing alkali by using waste salt in combination manner |
Non-Patent Citations (1)
| Title |
|---|
| 王中华等: "《油田化学品实用手册》", 31 July 2004 * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113860622A (en) * | 2021-11-19 | 2021-12-31 | 中煤能源研究院有限责任公司 | Reverse osmosis strong brine recycling system and method |
| CN114538471A (en) * | 2022-01-13 | 2022-05-27 | 宁波弗镁瑞环保科技有限公司 | Method for comprehensively utilizing sodium sulfate-sodium chloride mixed salt |
| CN114380306A (en) * | 2022-02-17 | 2022-04-22 | 常州大学 | Method for continuously producing sodium sulfate and ammonium chloride by using microreactor |
| CN114477230A (en) * | 2022-02-17 | 2022-05-13 | 常州大学 | Method for separating alkali salt through chemical sublimation-temperature-changing crystallization in Hou's combined alkali preparation |
| CN115490384A (en) * | 2022-10-09 | 2022-12-20 | 四川树霖科技集团有限公司 | Gas field water and waste salt comprehensive utilization combined alkali preparation method |
| CN115739204A (en) * | 2022-11-15 | 2023-03-07 | 万华化学（宁波）有限公司 | Ion exchanger, preparation method thereof and method for resource utilization of waste brine |
| CN115583660A (en) * | 2022-12-05 | 2023-01-10 | 鲁西化工集团股份有限公司氯碱化工分公司 | Device and method for preparing sodium carbonate and sodium chloride from byproduct salt |
| CN115872417A (en) * | 2023-03-08 | 2023-03-31 | 北京赛科康仑环保科技有限公司 | Bipolar membrane reinforced sodium chloride alkali preparation method |
| CN116730447A (en) * | 2023-08-08 | 2023-09-12 | 杭州匠容道环境科技有限公司 | Method and equipment for recycling fly ash water washing liquid |
| CN116730447B (en) * | 2023-08-08 | 2023-11-14 | 杭州匠容道环境科技有限公司 | Method and equipment for recycling fly ash water washing liquid |
| CN117446829A (en) * | 2023-12-25 | 2024-01-26 | 中国科学院过程工程研究所 | Method for preparing sodium carbonate and ammonium chloride by using short process of sodium chloride waste salt |
| CN117446829B (en) * | 2023-12-25 | 2024-04-05 | 中国科学院过程工程研究所 | Method for preparing sodium carbonate and ammonium chloride by using short process of sodium chloride waste salt |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113135582A (en) | Production method for jointly preparing sodium carbonate and ammonium chloride by using sodium chloride | |
| CN108046295B (en) | Method for producing sodium bicarbonate and ammonium sulfate by using sodium sulfate solution | |
| CA2755844C (en) | Production of high purity lithium compounds directly from lithium containing brines | |
| US10773969B1 (en) | Method for producing potassium sulfate and sodium chloride from wastewater | |
| JP2008532904A (en) | Method for obtaining sodium carbonate crystals | |
| CN102502708B (en) | Preparation method for preparing alkali metal or alkali earth metal cyanide with high purity and high yield | |
| CN110937612B (en) | Process for preparing high-quality heavy soda ash by using crude sodium bicarbonate | |
| CN111039305B (en) | Method for preparing sodium bicarbonate and ammonium sulfate by sodium sulfate in short process | |
| CN112225235A (en) | Method for preparing sodium bicarbonate and sodium bisulfate from sodium sulfate | |
| CN114715920B (en) | Method for preparing sodium carbonate and co-producing ammonium sulfate and ammonium chloride by using mixed sodium salt | |
| CN110589857A (en) | Method for preparing alkali by using waste salt in combination manner | |
| CN114715919B (en) | Method for preparing sodium bicarbonate and co-producing ammonium chloride by using sodium chloride waste salt | |
| CN101519383B (en) | Process for jointly producing cyanuramide, sodium carbonate and ammonium chloride by using carbamide | |
| CN114715921B (en) | High-value conversion method for mixed sodium salt | |
| CN114436296A (en) | Continuous production method for jointly preparing sodium carbonate and ammonium chloride by using sodium chloride | |
| CN114436297B (en) | Method for preparing sodium carbonate from mirabilite | |
| CN114477230A (en) | Method for separating alkali salt through chemical sublimation-temperature-changing crystallization in Hou's combined alkali preparation | |
| CA2986925C (en) | Methods for producing potassium sulfate and sodium chloride from wastewater | |
| WO1994018360A1 (en) | Process for recovering solid sodium bicarbonate from diaphragm cell | |
| CN113044857B (en) | Production process for preparing high-purity sodium cyanide or potassium cyanide with high yield | |
| CN112047401B (en) | Method for thickening and refining seawater by using sodium sulfate | |
| CN112209412B (en) | Method for extracting lithium and battery-grade lithium hydroxide monohydrate | |
| CN113184880A (en) | Method for separating ammonium chloride and potassium chloride mixture based on three-stage crystallization | |
| CN105645442A (en) | Process for jointly producing melamine, sodium carbonate and ammonium chloride by using urea | |
| CN217398465U (en) | Production device for preparing high-purity sodium cyanide or potassium cyanide with high yield |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |