CN110921901A - Treatment method of alkaline waste liquid - Google Patents
Treatment method of alkaline waste liquid Download PDFInfo
- Publication number
- CN110921901A CN110921901A CN201911245377.2A CN201911245377A CN110921901A CN 110921901 A CN110921901 A CN 110921901A CN 201911245377 A CN201911245377 A CN 201911245377A CN 110921901 A CN110921901 A CN 110921901A
- Authority
- CN
- China
- Prior art keywords
- potassium sulfate
- waste liquid
- nitric acid
- alkaline waste
- sulfuric acid
- 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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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D5/00—Sulfates or sulfites of sodium, potassium or alkali metals in general
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Removal Of Specific Substances (AREA)
Abstract
The invention belongs to the technical field of fluazinam production, and particularly relates to a method for treating alkaline waste liquid, which comprises the following steps of 1: adding mixed acid of nitric acid and sulfuric acid into the waste liquid, wherein the nitric acid accounts for 5-10%, the sulfuric acid accounts for 90-95%, heating to 60-70 ℃, and reacting for 0.5-2 hours; step 2: after full reaction, separating out potassium sulfate; and step 3: the separated potassium sulfate is refined by methanol to remove harmful impurities, so that the qualified agricultural potassium sulfate product is obtained.
Description
Technical Field
The invention belongs to the technical field of production of fluazinam, and particularly relates to a method for treating alkaline waste liquid.
Background
The production process of fluazinam produces alkaline waste liquid, the main component is mixed waste liquid of potassium hydroxide and multiple organic matters, the traditional method is to produce potassium chloride by using hydrochloric acid to neutralize, and solid potassium chloride is separated by triple effect evaporation and concentration, because the produced potassium chloride contains multiple organic matters, only dangerous waste treatment can be carried out, and the reutilization of resources can not be realized.
Disclosure of Invention
The invention provides a method for treating alkaline waste liquid, which can solve the problems pointed out in the background technology.
A method for treating alkaline waste liquid mainly comprises the following steps:
step 1: adding mixed acid of nitric acid and sulfuric acid into the waste liquid, wherein the nitric acid accounts for 5-10%, the sulfuric acid accounts for 90-95%, heating to 60-70 ℃, and reacting for 0.5-2 hours;
step 2: after full reaction, separating out potassium sulfate;
and step 3: and refining the separated potassium sulfate by methanol, and removing harmful impurities to obtain a qualified agricultural potassium sulfate product.
The invention provides a method for treating alkaline waste liquid, which utilizes the oxidability of nitric acid to oxidize organic matters in the waste liquid into small molecular compounds, utilizes the difference of the solubilities of potassium nitrate and potassium sulfate to separate potassium sulfate, and removes harmful impurities after the separated potassium sulfate is refined by methanol to obtain qualified agricultural potassium sulfate products, thereby realizing waste utilization.
Detailed Description
The following specific examples describe one embodiment of the present invention in detail, but it should be understood that the scope of the present invention is not limited to the specific embodiments.
Example 1:
the embodiment of the invention provides a method for treating alkaline waste liquid, which mainly comprises the following steps:
step 1: adding mixed acid of nitric acid and sulfuric acid into the waste liquid, wherein the nitric acid accounts for 5 percent, the sulfuric acid accounts for 95 percent, heating to 60-70 ℃, and reacting for 0.5-2 hours;
step 2: after full reaction, separating out potassium sulfate;
and step 3: and refining the separated potassium sulfate by methanol, and removing harmful impurities to obtain a qualified agricultural potassium sulfate product.
The invention provides a method for treating alkaline waste liquid, which utilizes the oxidability of nitric acid to oxidize organic matters in the waste liquid into small molecular compounds, utilizes the difference of the solubilities of potassium nitrate and potassium sulfate to separate potassium sulfate, and removes harmful impurities after the separated potassium sulfate is refined by methanol to obtain qualified agricultural potassium sulfate products, thereby realizing waste utilization.
Example 2:
the embodiment of the invention provides a method for treating alkaline waste liquid, which mainly comprises the following steps:
step 1: adding mixed acid of nitric acid and sulfuric acid into the waste liquid, wherein the nitric acid accounts for 10 percent, the sulfuric acid accounts for 90 percent, heating to 60-70 ℃, and reacting for 0.5-2 hours;
step 2: after full reaction, separating out potassium sulfate;
and step 3: and refining the separated potassium sulfate by methanol, and removing harmful impurities to obtain a qualified agricultural potassium sulfate product.
The invention provides a method for treating alkaline waste liquid, which utilizes the oxidability of nitric acid to oxidize organic matters in the waste liquid into small molecular compounds, utilizes the difference of the solubilities of potassium nitrate and potassium sulfate to separate potassium sulfate, and removes harmful impurities after the separated potassium sulfate is refined by methanol to obtain qualified agricultural potassium sulfate products, thereby realizing waste utilization.
Claims (1)
1. A method for treating alkaline waste liquid is characterized by comprising the following steps: the method mainly comprises the following steps:
step 1: adding mixed acid of nitric acid and sulfuric acid into the waste liquid, wherein the nitric acid accounts for 5-10%, the sulfuric acid accounts for 90-95%, heating to 60-70 ℃, and reacting for 0.5-2 hours;
step 2: after full reaction, separating out potassium sulfate;
and step 3: and refining the separated potassium sulfate by methanol, and removing harmful impurities to obtain a qualified agricultural potassium sulfate product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911245377.2A CN110921901A (en) | 2019-12-07 | 2019-12-07 | Treatment method of alkaline waste liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911245377.2A CN110921901A (en) | 2019-12-07 | 2019-12-07 | Treatment method of alkaline waste liquid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110921901A true CN110921901A (en) | 2020-03-27 |
Family
ID=69858208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911245377.2A Pending CN110921901A (en) | 2019-12-07 | 2019-12-07 | Treatment method of alkaline waste liquid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110921901A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115724443A (en) * | 2022-12-16 | 2023-03-03 | 宁夏润安微肥科技有限公司 | Method for recovering potassium nitrate and potassium sulfate from carbon and sulfur mixture |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120080383A1 (en) * | 2010-09-30 | 2012-04-05 | Earth Renewal Group, Llc | Waste treatment process |
| CN102438741A (en) * | 2009-04-01 | 2012-05-02 | 大地更新集团有限责任公司 | Improved aqueous phase oxidation process |
| CN106830492A (en) * | 2017-04-05 | 2017-06-13 | 利民化工股份有限公司 | A kind of processing method of methoxy acrylic Pesticidal products waste water |
-
2019
- 2019-12-07 CN CN201911245377.2A patent/CN110921901A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102438741A (en) * | 2009-04-01 | 2012-05-02 | 大地更新集团有限责任公司 | Improved aqueous phase oxidation process |
| US20120080383A1 (en) * | 2010-09-30 | 2012-04-05 | Earth Renewal Group, Llc | Waste treatment process |
| CN106830492A (en) * | 2017-04-05 | 2017-06-13 | 利民化工股份有限公司 | A kind of processing method of methoxy acrylic Pesticidal products waste water |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115724443A (en) * | 2022-12-16 | 2023-03-03 | 宁夏润安微肥科技有限公司 | Method for recovering potassium nitrate and potassium sulfate from carbon and sulfur mixture |
| CN115724443B (en) * | 2022-12-16 | 2024-08-06 | 宁夏润安微肥科技有限公司 | Method for recovering potassium nitrate and potassium sulfate from carbon and sulfur mixture |
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