CN109368652A - A kind of method that tail gas absorption waste liquid prepares potassium fluoborate - Google Patents
A kind of method that tail gas absorption waste liquid prepares potassium fluoborate Download PDFInfo
- Publication number
- CN109368652A CN109368652A CN201811412740.0A CN201811412740A CN109368652A CN 109368652 A CN109368652 A CN 109368652A CN 201811412740 A CN201811412740 A CN 201811412740A CN 109368652 A CN109368652 A CN 109368652A
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- CN
- China
- Prior art keywords
- water
- waste liquid
- tail gas
- added
- potassium fluoborate
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- 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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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B35/00—Boron; Compounds thereof
- C01B35/06—Boron halogen compounds
- C01B35/063—Tetrafluoboric acid; Salts thereof
- C01B35/066—Alkali metal tetrafluoborates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/20—Halides
- C01F11/24—Chlorides
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Treating Waste Gases (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The invention discloses a kind of methods that tail gas absorption waste liquid prepares potassium fluoborate, comprising the following steps: 1) tap water is added in tail gas water scrubber, potassium hydroxide solution and water is added in caustic wash tower；2) it is passed through hydrogen fluoride and chlorine hydride mixed gas body, total acidity changes water at 35 ~ 40% in water scrubber, and solution pH value changes absorbing liquid for 7 ~ 8 or so in caustic wash tower；3) waste liquid in caustic wash tower is squeezed into potassium fluoborate dissolving tank, is heated using steam；4) borax and potassium chloride stirring and dissolving is added；5) lysate is squeezed into reaction kettle, waste liquid in water scrubber is added until reaction end；6) reaction kettle is put into cooling reactor and is cooled down；7) reaction solution is put into suction filtration tank；8) filter cake is rinsed after the completion of filtering；9) it is packed after filter cake is dried.Alkali cleaning can be absorbed devil liquor recovery using potassium fluoborate is prepared, reduce production cost by a kind of method for preparing potassium fluoborate using tail gas absorption waste liquid of the present invention.
Description
Technical field
The present invention relates to the sides that the synthesis technology of potassium fluoborate more particularly to a kind of tail gas absorption waste liquid prepare potassium fluoborate
Method.
Background technique
In current lithium hexafluoro phosphate production process, a large amount of HF, HCl gases can be generated, are needed using the absorption of two-stage water, one
It can be just discharged into atmosphere after grade Alkali absorption processing, during Alkali absorption, original uses 2 solution of Ca (OH) as absorbing liquid, has absorbed
Cheng Houhui generates a large amount of CaF2, CaCl2 mixed solution waste liquids, and waste liquid can squeeze into plant area's sewage treatment, can just arrange after treatment
Enter garden sewage conduct, wastes a large amount of HF raw material in the process, and generate a large amount of waste materials, substantially increase sewage treatment post
Workload, be added significantly to production cost.
Summary of the invention
To solve the above problems, the present invention provides a kind of method that tail gas absorption waste liquid prepares potassium fluoborate, it can be by alkali
It washes and absorbs devil liquor recovery using potassium fluoborate is prepared, mitigate sewage treatment works load, reduce production cost.
To achieve the goals above, the technical scheme is to design a kind of tail gas absorption waste liquids to prepare potassium fluoborate
Method, which comprises the following steps:
Step 1: tap water is added in tail gas water scrubber, potassium hydroxide solution and water are added in caustic wash tower；
Step 2: it is passed through the hydrogen fluoride of output and chlorine hydride mixed gas body in lithium hexafluoro phosphate production process, total acid in water scrubber
Degree changes water at 35 ~ 40%, and solution pH value changes absorbing liquid for 7 ~ 8 or so in caustic wash tower；
Step 3: waste liquid in caustic wash tower is squeezed into potassium fluoborate dissolving tank, using being steam heated to 60 ~ 70 DEG C；
Step 4: borax and potassium chloride stirring and dissolving is added, and solution temperature is kept to stablize at 60 ~ 70 DEG C；
Step 5: lysate is squeezed into reaction kettle, waste liquid in water scrubber is added until reaction end, it need to will be in reaction kettle when reaction
Temperature controls between 70 ~ 80 DEG C；
25 ~ 30 DEG C are cooled to Step 6: reaction kettle is put into cooling reactor；
Step 7: reaction solution is put into suction filtration tank, extraction liquid is fluorine-containing hydrochloric acid, as Calcium Chloride Production raw material；
Step 8: being rinsed using tap water to filter cake after the completion of filtering, flushing liquor is low concentration fluorine-containing hydrochloric acid, squeezes into hexafluoro
It is used in lithium phosphate water scrubber as absorbing liquid；
Step 9: filter cake is packed after being dried.
Further, the ratio of potassium hydroxide solution and water is preferably in a proportion of 1 between 1:30 ~ 1:100 in step 1:
50。
The advantages and beneficial effects of the present invention are: a kind of side for preparing potassium fluoborate using tail gas absorption waste liquid of the present invention
Alkali cleaning can be absorbed devil liquor recovery using potassium fluoborate is prepared, mitigate sewage treatment works load, reduce production cost by method.
Specific embodiment
With reference to embodiment, the specific embodiment of the present invention is further described.Following embodiment is only used for more
Add and clearly demonstrate technical solution of the present invention, and not intended to limit the protection scope of the present invention.
Embodiment:
A kind of method that tail gas absorption waste liquid prepares potassium fluoborate, comprising the following steps:
Step 1: tap water is added in tail gas water scrubber, potassium hydroxide solution and water, potassium hydroxide solution are added in caustic wash tower
Ratio with water is 1:50；
Step 2: it is passed through the hydrogen fluoride of output and chlorine hydride mixed gas body in lithium hexafluoro phosphate production process, total acid in water scrubber
Degree changes water at 35 ~ 40%, and solution pH value changes absorbing liquid for 7 ~ 8 or so in caustic wash tower；
Step 3: waste liquid in caustic wash tower is squeezed into potassium fluoborate dissolving tank, using being steam heated to 60 ~ 70 DEG C；
Step 4: borax and potassium chloride stirring and dissolving is added, and solution temperature is kept to stablize at 60 ~ 70 DEG C；
Step 5: lysate is squeezed into reaction kettle, waste liquid in water scrubber is added until reaction end, it need to will be in reaction kettle when reaction
Temperature controls between 70 ~ 80 DEG C；
25 ~ 30 DEG C are cooled to Step 6: reaction kettle is put into cooling reactor；
Step 7: reaction solution is put into suction filtration tank, extraction liquid is fluorine-containing hydrochloric acid, as Calcium Chloride Production raw material；
Step 8: being rinsed using tap water to filter cake after the completion of filtering, flushing liquor is low concentration fluorine-containing hydrochloric acid, squeezes into hexafluoro
It is used in lithium phosphate water scrubber as absorbing liquid；
Step 9: filter cake is packed after being dried.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvements and modifications can also be made, these improvements and modifications
Also it should be regarded as protection scope of the present invention.
Claims (3)
1. a kind of method that tail gas absorption waste liquid prepares potassium fluoborate, which comprises the following steps:
Step 1: tap water is added in tail gas water scrubber, potassium hydroxide solution and water are added in caustic wash tower；
Step 2: it is passed through the hydrogen fluoride of output and chlorine hydride mixed gas body in lithium hexafluoro phosphate production process, total acid in water scrubber
Degree changes water at 35 ~ 40%, and solution pH value changes absorbing liquid for 7 ~ 8 or so in caustic wash tower；
Step 3: waste liquid in caustic wash tower is squeezed into potassium fluoborate dissolving tank, using being steam heated to 60 ~ 70 DEG C；
Step 4: borax and potassium chloride stirring and dissolving is added, and solution temperature is kept to stablize at 60 ~ 70 DEG C；
Step 5: lysate is squeezed into reaction kettle, waste liquid in water scrubber is added until reaction end, it need to will be in reaction kettle when reaction
Temperature controls between 70 ~ 80 DEG C；
25 ~ 30 DEG C are cooled to Step 6: reaction kettle is put into cooling reactor；
Step 7: reaction solution is put into suction filtration tank, extraction liquid is fluorine-containing hydrochloric acid, as Calcium Chloride Production raw material；
Step 8: being rinsed using tap water to filter cake after the completion of filtering, flushing liquor is low concentration fluorine-containing hydrochloric acid, squeezes into hexafluoro
It is used in lithium phosphate water scrubber as absorbing liquid；
Step 9: filter cake is packed after being dried.
2. the method that a kind of tail gas absorption waste liquid according to claim 1 prepares potassium fluoborate, which is characterized in that step 1
The ratio of middle potassium hydroxide solution and water is between 1:30 ~ 1:100.
3. the method that a kind of tail gas absorption waste liquid according to claim 2 prepares potassium fluoborate, which is characterized in that step 1
The ratio of middle potassium hydroxide solution and water is 1:50.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811412740.0A CN109368652A (en) | 2018-11-26 | 2018-11-26 | A kind of method that tail gas absorption waste liquid prepares potassium fluoborate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811412740.0A CN109368652A (en) | 2018-11-26 | 2018-11-26 | A kind of method that tail gas absorption waste liquid prepares potassium fluoborate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109368652A true CN109368652A (en) | 2019-02-22 |
Family
ID=65383378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811412740.0A Pending CN109368652A (en) | 2018-11-26 | 2018-11-26 | A kind of method that tail gas absorption waste liquid prepares potassium fluoborate |
Country Status (1)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111498861A (en) * | 2020-04-23 | 2020-08-07 | 无锡中天固废处置有限公司 | Polarizing plate waste liquid treatment method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4126488A (en) * | 1976-07-23 | 1978-11-21 | Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler | Boriding agent for boriding mass produced parts of ferrous and non-ferrous metals |
| CN103332700A (en) * | 2013-07-23 | 2013-10-02 | 森田化工(张家港)有限公司 | Method for preparing potassium borofluoride through fluorine-containing wastewater |
| CN104891517A (en) * | 2015-06-09 | 2015-09-09 | 天津金牛电源材料有限责任公司 | Method for producing potassium borofluoride by utilizing lithium hexafluorophosphate recovery acid mixture |
| CN106693599A (en) * | 2017-01-19 | 2017-05-24 | 森田新能源材料（张家港）有限公司 | Device and method for treating waste gas in lithium hexafluorophate preparation process |
| CN108147436A (en) * | 2018-02-26 | 2018-06-12 | 江苏新泰材料科技有限公司 | Combined coefficient is improved in lithium hexafluoro phosphate production process reduces the synthetic method of unit consumption |
-
2018
- 2018-11-26 CN CN201811412740.0A patent/CN109368652A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4126488A (en) * | 1976-07-23 | 1978-11-21 | Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler | Boriding agent for boriding mass produced parts of ferrous and non-ferrous metals |
| CN103332700A (en) * | 2013-07-23 | 2013-10-02 | 森田化工(张家港)有限公司 | Method for preparing potassium borofluoride through fluorine-containing wastewater |
| CN104891517A (en) * | 2015-06-09 | 2015-09-09 | 天津金牛电源材料有限责任公司 | Method for producing potassium borofluoride by utilizing lithium hexafluorophosphate recovery acid mixture |
| CN106693599A (en) * | 2017-01-19 | 2017-05-24 | 森田新能源材料（张家港）有限公司 | Device and method for treating waste gas in lithium hexafluorophate preparation process |
| CN108147436A (en) * | 2018-02-26 | 2018-06-12 | 江苏新泰材料科技有限公司 | Combined coefficient is improved in lithium hexafluoro phosphate production process reduces the synthetic method of unit consumption |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111498861A (en) * | 2020-04-23 | 2020-08-07 | 无锡中天固废处置有限公司 | Polarizing plate waste liquid treatment method |
| CN111498861B (en) * | 2020-04-23 | 2022-07-26 | 无锡中天固废处置有限公司 | Polarizing plate waste liquid treatment method |
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Application publication date: 20190222 |