CN108793199B - Method for recycling sodium chloride from potassium chlorate preparation wastewater - Google Patents
Method for recycling sodium chloride from potassium chlorate preparation wastewater Download PDFInfo
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- CN108793199B CN108793199B CN201810508981.9A CN201810508981A CN108793199B CN 108793199 B CN108793199 B CN 108793199B CN 201810508981 A CN201810508981 A CN 201810508981A CN 108793199 B CN108793199 B CN 108793199B
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D3/00—Halides of sodium, potassium or alkali metals in general
- C01D3/04—Chlorides
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D3/00—Halides of sodium, potassium or alkali metals in general
- C01D3/14—Purification
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B34/00—Obtaining refractory metals
- C22B34/30—Obtaining chromium, molybdenum or tungsten
- C22B34/32—Obtaining chromium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/006—Wet processes
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- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Manufacturing & Machinery (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Removal Of Specific Substances (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a method for recovering sodium chloride from potassium chlorate wastewater, which comprises the following steps: (1) collecting a solution containing sodium chloride, separating chromium metal in the solution, and storing the separated chromium metal; (2) evaporating and concentrating the solution for removing chromium metal at the temperature of 100 ℃; cooling to room temperature; (3) adding a mixture of barium chloride and sodium hydroxide into the solution, uniformly stirring, fully reacting, and filtering to separate solid from liquid to obtain barium sulfate precipitate and filtered liquid; (4) evaporating and concentrating the filtered liquid again at the temperature of 100 ℃; cooling to room temperature; (5) adding organic solvent into the cooled solution, and separating out sodium chloride crystals. The method separates chromium metal in the wastewater by the metal stabilizer, removes acid radical substances by barium chloride, and finally obtains sodium chloride crystals by twice evaporation and concentration, and the whole process has no waste gas and waste water discharge, and is simple to operate and easy to realize.
Description
Technical Field
The invention relates to a method for recovering sodium chloride from potassium chlorate wastewater, belonging to the technical field of chlorate preparation.
Background
Sodium chlorate and potassium chlorate can be prepared by electrolyzing saturated sodium chloride solution, and in order to reduce the reduction loss of electrolysis products or intermediate products at the cathode of an electrolytic cell in the electrolysis process, a certain amount of sodium dichromate is required to be added into the electrolysis mother liquor as an additive for preventing the cathode from being reduced. In the electrolytic process, some waste water can be discharged, most of the waste water is chloride, a small amount of chromium metal, and if the waste water is directly discharged, the waste water permeates underground, so that the environment pollution is caused, and the content of the chloride in the waste water is wasted.
Disclosure of Invention
The invention aims to provide a method for recovering sodium chloride from potassium chlorate wastewater, which can not only separate chromium metal, but also recover sodium chloride crystals in the wastewater.
The invention is realized by the following technical scheme:
a method for recovering sodium chloride from potassium chlorate wastewater comprises the following steps:
(1) collecting a solution containing sodium chloride, separating chromium metal in the solution, and storing the separated chromium metal;
(2) evaporating and concentrating the solution for removing chromium metal at the temperature of 100 ℃; cooling to room temperature;
(3) adding a mixture of barium chloride and sodium hydroxide into the solution, uniformly stirring, fully reacting, and filtering to separate solid from liquid to obtain barium sulfate precipitate and filtered liquid;
(4) evaporating and concentrating the filtered liquid again at the temperature of 100 ℃; cooling to room temperature;
(5) and (4) adding an organic solvent into the cooled solution in the step (4) and separating out the sodium chloride crystals.
Further, the step (1) of separating chromium metal in the liquid specifically means that a metal stabilizer is added into the solution, the metal stabilizer absorbs chromium ions and forms a precipitate, and the precipitate is separated from the liquid.
Further, the metal stabilizer comprises the following components in percentage by mass: 20-30 parts of calcium oxide, 12-15 parts of sodium sulfate, 2-5 parts of oxidized starch, 7-10 parts of sodium hydroxide and 5-8 parts of sodium carbonate.
Further, the mass ratio of the mixture of barium chloride and sodium hydroxide in the step (3) is 5: 2-3.
Further, the organic solvent in the step (5) is one or more of methanol, ethanol, diethyl ether, acetone, ethylene glycol, glycerol, formaldehyde, acetaldehyde, formic acid and acetic acid.
The method separates chromium metal in the wastewater by the metal stabilizer, removes acid radical substances by barium chloride, and finally obtains sodium chloride crystals by twice evaporation and concentration, and the whole process has no waste gas and waste water discharge, and is simple to operate and easy to realize.
Detailed Description
Example 1
The method for recovering sodium chloride from potassium chlorate wastewater provided by the embodiment comprises the following steps:
(1) collecting a sodium chloride-containing solution, separating chromium metal in the liquid, storing the separated chromium metal, wherein the chromium metal in the separated liquid is specifically that a metal stabilizer is added into the solution, the metal stabilizer absorbs chromium ions to form a precipitate, and separating the precipitate from the liquid; the metal stabilizer comprises the following components in percentage by mass: 20 parts of calcium oxide, 12 parts of sodium sulfate, 2 parts of oxidized starch, 7 parts of sodium hydroxide and 5 parts of sodium carbonate;
(2) evaporating and concentrating the solution for removing chromium metal at the temperature of 100 ℃; cooling to room temperature;
(3) adding a mixture of barium chloride and sodium hydroxide into the solution, uniformly stirring, fully reacting, and filtering to separate solid from liquid to obtain barium sulfate precipitate and filtered liquid; the mass ratio of the barium chloride to the sodium hydroxide mixture is 5: 2;
(4) evaporating and concentrating the filtered liquid again at the temperature of 100 ℃; cooling to room temperature;
(5) adding an organic solvent into the solution cooled in the step (4), and separating out sodium chloride crystals; the organic solvent is one or more of methanol, ethanol, diethyl ether, acetone, ethylene glycol, glycerol, formaldehyde, acetaldehyde, formic acid and acetic acid.
Example 2
The method for recovering sodium chloride from potassium chlorate wastewater provided by the embodiment comprises the following steps:
(1) collecting a sodium chloride-containing solution, separating chromium metal in the liquid, storing the separated chromium metal, wherein the chromium metal in the separated liquid is specifically that a metal stabilizer is added into the solution, the metal stabilizer absorbs chromium ions to form a precipitate, and separating the precipitate from the liquid; the metal stabilizer comprises the following components in percentage by mass: 25 parts of calcium oxide, 13 parts of sodium sulfate, 3 parts of oxidized starch, 8 parts of sodium hydroxide and 6 parts of sodium carbonate;
(2) evaporating and concentrating the solution for removing chromium metal at the temperature of 100 ℃; cooling to room temperature;
(3) adding a mixture of barium chloride and sodium hydroxide into the solution, uniformly stirring, fully reacting, and filtering to separate solid from liquid to obtain barium sulfate precipitate and filtered liquid; the mass ratio of the barium chloride to the sodium hydroxide mixture is 5: 3.
(4) Evaporating and concentrating the filtered liquid again at the temperature of 100 ℃; cooling to room temperature;
(5) adding an organic solvent into the solution cooled in the step (4), and separating out sodium chloride crystals; the organic solvent is one or more of methanol, ethanol, diethyl ether, acetone, ethylene glycol, glycerol, formaldehyde, acetaldehyde, formic acid and acetic acid.
Example 3
The method for recovering sodium chloride from potassium chlorate wastewater provided by the embodiment comprises the following steps:
(1) collecting a sodium chloride-containing solution, separating chromium metal in the liquid, storing the separated chromium metal, wherein the chromium metal in the separated liquid is specifically that a metal stabilizer is added into the solution, the metal stabilizer absorbs chromium ions to form a precipitate, and separating the precipitate from the liquid; the metal stabilizer comprises the following components in percentage by mass: 30 parts of calcium oxide, 15 parts of sodium sulfate, 5 parts of oxidized starch, 10 parts of sodium hydroxide and 8 parts of sodium carbonate;
(2) evaporating and concentrating the solution for removing chromium metal at the temperature of 100 ℃; cooling to room temperature;
(3) adding a mixture of barium chloride and sodium hydroxide into the solution, uniformly stirring, fully reacting, and filtering to separate solid from liquid to obtain barium sulfate precipitate and filtered liquid; the mass ratio of the barium chloride to the sodium hydroxide mixture is 5: 2.
(4) Evaporating and concentrating the filtered liquid again at the temperature of 100 ℃; cooling to room temperature;
(5) adding an organic solvent into the solution cooled in the step (4), and separating out sodium chloride crystals; the organic solvent is one or more of methanol, ethanol, diethyl ether, acetone, ethylene glycol, glycerol, formaldehyde, acetaldehyde, formic acid and acetic acid.
The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any modification and replacement based on the technical solution and inventive concept provided by the present invention should be covered within the scope of the present invention.
Claims (1)
1. A method for recovering sodium chloride from potassium chlorate wastewater is characterized by comprising the following steps:
(1) collecting a solution containing sodium chloride, separating chromium metal in the solution, and storing the separated chromium metal; separating chromium metal in the liquid specifically means adding a metal stabilizer into the solution, absorbing chromium ions by the metal stabilizer to form a precipitate, and separating the precipitate from the liquid; the metal stabilizer comprises the following components in percentage by mass: 20-30 parts of calcium oxide, 12-15 parts of sodium sulfate, 2-5 parts of oxidized starch, 7-10 parts of sodium hydroxide and 5-8 parts of sodium carbonate;
(2) evaporating and concentrating the solution for removing chromium metal at the temperature of 100 ℃; cooling to room temperature;
(3) adding a mixture of barium chloride and sodium hydroxide into the solution, uniformly stirring, fully reacting, and filtering to separate solid from liquid to obtain barium sulfate precipitate and filtered liquid; the mass ratio of the mixture of barium chloride and sodium hydroxide is 5: 2-3;
(4) evaporating and concentrating the filtered liquid again at the temperature of 100 ℃; cooling to room temperature;
(5) adding an organic solvent into the solution cooled in the step (4), and separating out sodium chloride crystals; the organic solvent is one or more of methanol, ethanol, diethyl ether, acetone, ethylene glycol, glycerol, formaldehyde, acetaldehyde, formic acid and acetic acid.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810508981.9A CN108793199B (en) | 2018-05-24 | 2018-05-24 | Method for recycling sodium chloride from potassium chlorate preparation wastewater |
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| CN201810508981.9A CN108793199B (en) | 2018-05-24 | 2018-05-24 | Method for recycling sodium chloride from potassium chlorate preparation wastewater |
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| CN108793199B true CN108793199B (en) | 2020-06-12 |
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| CN110790286B (en) * | 2019-11-17 | 2023-07-04 | 南通职业大学 | Method for disposing industrial byproduct sodium chloride |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101942674A (en) * | 2010-09-26 | 2011-01-12 | 茂县鑫盐化工有限公司 | Recycling method of waste salt in potassium perchlorate production process |
| CN102807192A (en) * | 2012-08-08 | 2012-12-05 | 浏阳市化工厂有限公司 | Potassium perchlorate production technology with zero wastewater discharge and products thereof |
| CN106007135A (en) * | 2016-05-27 | 2016-10-12 | 湖南傲创科技有限公司湘潭分公司 | Potassium perchlorate effluent brine treatment apparatus, and technology for recovering potassium perchlorate and sodium chloride from potassium perchlorate effluent brine |
| CN106591876A (en) * | 2016-12-20 | 2017-04-26 | 四川岷江雪盐化有限公司 | Method for preparing sodium chlorate from industrial salt |
| CN106744694A (en) * | 2017-01-23 | 2017-05-31 | 石棉县天钰科技有限公司 | The recovery method of potassium hyperchlorate production method and chlorination mother liquid of sodium |
-
2018
- 2018-05-24 CN CN201810508981.9A patent/CN108793199B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101942674A (en) * | 2010-09-26 | 2011-01-12 | 茂县鑫盐化工有限公司 | Recycling method of waste salt in potassium perchlorate production process |
| CN102807192A (en) * | 2012-08-08 | 2012-12-05 | 浏阳市化工厂有限公司 | Potassium perchlorate production technology with zero wastewater discharge and products thereof |
| CN106007135A (en) * | 2016-05-27 | 2016-10-12 | 湖南傲创科技有限公司湘潭分公司 | Potassium perchlorate effluent brine treatment apparatus, and technology for recovering potassium perchlorate and sodium chloride from potassium perchlorate effluent brine |
| CN106591876A (en) * | 2016-12-20 | 2017-04-26 | 四川岷江雪盐化有限公司 | Method for preparing sodium chlorate from industrial salt |
| CN106744694A (en) * | 2017-01-23 | 2017-05-31 | 石棉县天钰科技有限公司 | The recovery method of potassium hyperchlorate production method and chlorination mother liquid of sodium |
Non-Patent Citations (3)
| Title |
|---|
| 高氯酸盐生产工艺研究(IV);陈大元等;《湘潭大学自然科学学报》;19871231(第四期);第73-76页 * |
| 高氯酸钾联合生产法新工艺;施恭盛;《化学工程与装备》;20140331(第3期);第54-58页 * |
| 高氯酸钾项目生产过程中的环境风险及防范措施;王罗竑等;《中国环境管理干部学院学报》;20100228;第20卷(第1期);第66-70页 * |
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Effective date of registration: 20200512 Address after: Luqiao Jinqing Sanjin village in Taizhou City, Zhejiang province 318050 Applicant after: JIELONG FAN FACTORY TAIZHOU CI Address before: 623000 seven Gou Gou, Weizhou Town, Wenchuan County, Aba Tibetan and Qiang Autonomous Prefecture, Sichuan Applicant before: WENCHUAN XIANGNING CHLORATE Co.,Ltd. |
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