CN109052355A - The method of phosphoric acid and acetic acid is recycled from waste aluminum etching solution - Google Patents
The method of phosphoric acid and acetic acid is recycled from waste aluminum etching solution Download PDFInfo
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- CN109052355A CN109052355A CN201810890774.4A CN201810890774A CN109052355A CN 109052355 A CN109052355 A CN 109052355A CN 201810890774 A CN201810890774 A CN 201810890774A CN 109052355 A CN109052355 A CN 109052355A
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- phosphoric acid
- acetic acid
- acid
- etching solution
- waste aluminum
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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
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/18—Phosphoric acid
- C01B25/234—Purification; Stabilisation; Concentration
- C01B25/237—Selective elimination of impurities
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/42—Separation; Purification; Stabilisation; Use of additives
- C07C51/43—Separation; Purification; Stabilisation; Use of additives by change of the physical state, e.g. crystallisation
- C07C51/44—Separation; Purification; Stabilisation; Use of additives by change of the physical state, e.g. crystallisation by distillation
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C53/00—Saturated compounds having only one carboxyl group bound to an acyclic carbon atom or hydrogen
- C07C53/08—Acetic acid
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- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Removal Of Specific Substances (AREA)
Abstract
The method that the invention discloses a kind of to recycle phosphoric acid and acetic acid from waste aluminum etching solution, comprising the following steps: 1) aluminium etching waste liquor is evaporated under reduced pressure, acetic acid and nitric acid are removed in the way of fractionation；2) alcohol treatment, purifying are utilized and recycles phosphoric acid；3) sodium acetate addition nitric acid-acetic acid-water mixed liquid is reacted into obtain acetic acid, the acetic acid of high concentration is obtained using water absorbing agent.The present invention provides a kind of method of the harmless treatment and resource utilization of nitration mixture recycling and reusing, the method farthest realizes the resource recycling of phosphoric acid and acetic acid, not only saves raw material, increases economic efficiency, and waste water is drastically reduced, avoid the wasting of resources and environmental pollution；This method technical process is simple, and operability is good, can reach efficient resource, is suitable for the industrial production and liquid waste processing of related fields.
Description
Technical field
The present invention relates to nitration mixture separation, recycling and application fields in etching liquid, more particularly to one kind from waste aluminum etching solution
The middle method for recycling phosphoric acid and acetic acid.
Background technique
Currently, the display technology based on Thin Film Transistor-LCD (TFT-LCD) is rapidly developed, I
State has become the maximum production base of global display.A large amount of acidic etching waste liquid can be discharged in TFT-LCD manufacturing process.
If the processing of these waste liquids is not appropriate enough, it will result in the pollution of biochemical environment, important influence caused to the health of the mankind.Cause
This, can make full use of some effective scientific methods to carry out recycling treatment, direct emission not only waste of resource but also pollution ring
Border.
Aluminium etching liquid be panel manufacturing process generate highly acid waste liquid, waste liquid main component be phosphoric acid, acetic acid, nitric acid,
Water and a small amount of metal ion, wherein phosphorus acid content is 50% or more.At present for the processing side of spent acid in aluminium etching waste liquid
Method is mainly acid-base neutralization processing, and this method energy consumption is high, and wastes phosphor resource.Also there are many explorations in this field to grind
Study carefully, but mostly has no idea effectively recovery acid and to meet the acid solution of economic benefit purifies and separates single component.
Therefore it is effectively solved from the method for phosphoric acid and acetic acid is recycled in waste aluminum etching solution it is urgent to provide one kind
State problem.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of from waste aluminum etching solution recycles phosphoric acid and acetic acid
Method, can effective recycling phosphoric acid and acetic acid, avoid the wasting of resources and environmental pollution.
In order to solve the above technical problems, one technical scheme adopted by the invention is that: one kind is provided from waste aluminum etching solution
The method for recycling phosphoric acid and acetic acid, comprising the following steps:
(1) it will be evaporated under reduced pressure after waste aluminum etching solution decontamination, acetic acid and nitric acid removed in the way of fractionation, collection evaporates
Liquid out；
(2) esterification is carried out to which ethyl alcohol is added in distillate in step (1), removes remaining acetate in minute, and benefit
Ethyl acetate and ethyl alcohol are removed with fractionation mode, purifies phosphoric acid again；
(3) phosphoric acid that step (2) obtains is filtered plus distilled water obtains the phosphoric acid that mass concentration is 85% -89%, it is cold
But, crystallize, filter, obtain phosphoric acid crystal, filtrate is industrial phosphoric acid；
(4) nitric acid-acetic acid-water distillate is heated, stirring, the neutralizer with nitric acid equimolar quality, mixing is added
Reaction, the mixed liquor after neutralization are directly distilled, and acetic acid is collected, and raffinate is handled from bottom discharge.
In a preferred embodiment of the present invention, in step (1) decontamination the specific steps are aluminium scrap etching solution is heated,
Stirring is added active carbon and is kept stirring 1.5-2h, filters while hot, the waste aluminum etching solution after collecting and impurity removing matter.
In the step (1), due to phosphoric acid, nitric acid, acetic acid boiling point difference and also its volatility difference is larger (is shown in Table
1)。
The physical property comparison of table 1, phosphoric acid, nitric acid, acetic acid
| Phosphoric acid | Nitric acid | Acetic acid | |
| Boiling point | 158℃ | 83℃ | 117.9℃ |
| Volatility | It is non-volatile | It is volatile | It is volatile |
| Chemical characteristic | Strong oxidizing property, strong corrosive | There is corrosion to metal when concentration is dilute |
As shown in Table 1, phosphoric acid and nitric acid, acetic acid can be separated and recovered by distillation.In view of nitric acid and acetic acid
Realization low-energy-efficiency in volatility and production, the in order to obtain phosphoric acid of high-purity, when distillation, have selected vacuum distillation.Taking into account nitre
Acid and acetic acid volatility improve between phosphoric acid purity and low energy consumption, and by repetition test, the optimum condition of vacuum distillation is: true
Reciprocal of duty cycle be 0.09-0.1Mpa, 80-100 DEG C of temperature, 4-6 hours.
In a preferred embodiment of the present invention, in step (3), by mass concentration be 85% -89% phosphoric acid cooling in
At 10-15 DEG C, 3% crystal seed, 0-5 DEG C of crystallizations is added, filtering obtains phosphoric acid crystal.
In a preferred embodiment of the present invention, in step (3), obtained phosphoric acid crystal is diluted to 85% with distilled water
More than, then cool down when 10-15 DEG C, 3% crystal seed, 0-5 DEG C of recrystallizations is added, the phosphoric acid crystalline substance of electron level can be obtained in filtering
Body.
In a preferred embodiment of the present invention, it in step (4), to water absorbing agent is put into the acetic acid of recycling, filters, obtains
Mass concentration is greater than 70% acetic acid.
Specifically, the water absorbing agent is anhydrous magnesium sulfate.
In a preferred embodiment of the present invention, in step (4), the neutralizer is acetate, specifically, the neutralization
Agent is sodium acetate.
The beneficial effects of the present invention are: the present invention provides the harmless treatment and recycling benefit of a kind of nitration mixture recycling and reusing
Method, the method farthest realize the resource recycling of phosphoric acid and acetic acid, not only save raw material, improve economical
Benefit, and waste water is drastically reduced, avoid the wasting of resources and environmental pollution；This method technical process is simple, can operate
Property is good, can reach efficient resource, is suitable for the industrial production and liquid waste processing of related fields.
Detailed description of the invention
Fig. 1 is the process for one preferred embodiment of method that the present invention recycles phosphoric acid and acetic acid from waste aluminum etching solution
Figure.
Specific embodiment
The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawing, so that advantages and features of the invention energy
It is easier to be readily appreciated by one skilled in the art, so as to make a clearer definition of the protection scope of the present invention.
Referring to Fig. 1, the embodiment of the present invention includes:
Embodiment 1:
Opto-electronics etching waste liquor 1000g is taken, chemical analysis and content are as follows:
| Chemical analysis | H3PO4 | CH3COOH | HNO3 | H2O | Al |
| Content (mass fraction) | 62.6% | 10.2% | 4.3% | 18.9% | Minute quantity |
Nitration mixture in waste aluminum etching solution is recycled in accordance with the following steps:
(1) 1000g waste aluminum etching solution is heated 55 DEG C, active carbon is added under 120rpm mixing speed, active carbon can drop
Coloration and turbidity in low waste liquid, are kept stirring 1.5h, filter while hot, aluminium scrap etching solution after collecting and impurity removing matter；
(2) because phosphoric acid and nitric acid, the boiling point of acetic acid and volatility differ greatly, by nitric acid and acetic acid in the way of fractionation
It is separated from the aluminium scrap etching solution.Waste liquid is evaporated under reduced pressure under the conditions of 0.095Mpa, 90 DEG C of temperature, is made in waste liquid
Nitric acid and acetic acid evaporate, and collect distillate 403.4g；
(3) progress acetic acid esterified is being added in the residual solution for handling ethyl alcohol addition step 2 with removing remaining acetate in minute
100 DEG C of heat, the concentrated sulfuric acid of raw material weight 0.3% be catalyst, be stirred at reflux under the conditions of carry out reaction 2h after, remove ethyl acetate
And water, obtain 93% purity phosphoric acid.It will be filtered to distillate phosphoric acid, and remove impurity, and continuously distilled water be added to adjust under temperature 50 C
Specific gravity obtains the phosphoric acid of mass concentration 85%；
(4) above-mentioned phosphoric acid is cooled down in 15 DEG C when, 3% crystal seed, 0-5 DEG C of crystallizations is added, filtering obtains phosphoric acid crystal, can go
Except metal cation component.Phosphoric acid crystal is diluted to 85% or more with distilled water, then is recrystallized with the same terms, electricity can be obtained
The phosphoric acid crystal 551.2g of sub- grade, the rate of recovery 88%, the industrial phosphoric acid that residual filtrate is 89%；
(5) nitric acid-acetic acid-water distillate is heated to 60 DEG C, under 80rpm stirring, be added and nitric acid equimolar matter
The neutralizer sodium acetate of amount, the concentration of sodium acetate is 0.03mol/L, volume 200mL, sufficiently agitation mixing, mixed after neutralization
It closes liquid directly to be distilled, collects acetic acid, raffinate is handled from bottom discharge.Water absorbing agent anhydrous slufuric acid is put into the acetic acid of recycling
Magnesium, filtering, can obtain the acetic acid 130.2g of 70% or more mass concentration, this process recovery rate 92%.
Embodiment 2:
Opto-electronics etching waste liquor 1000g is taken, chemical analysis and content are as follows:
| Chemical analysis | H3PO4 | CH3COOH | HNO3 | H2O | Al |
| Content (mass fraction) | 67.6% | 9.4% | 4.8% | 20.2% | Minute quantity |
Nitration mixture in waste aluminum etching solution is recycled in accordance with the following steps:
(1) 1000g waste aluminum etching solution is heated 55 DEG C, active carbon is added under 125rpm mixing speed, is kept stirring 2h,
It filters while hot, aluminium scrap etching solution after collecting and impurity removing matter；
(2) waste liquid is evaporated under reduced pressure under the conditions of 0.095Mpa, 90 DEG C, volatilizes nitric acid and acetic acid in waste liquid
Come, collects distillate 398.4g；
(3) the maimed liquid that ethyl alcohol addition step 2 is handled is subjected to acetic acid esterified reaction, in 100 DEG C, raw material weight 0.5%
The concentrated sulfuric acid be catalyst, be stirred at reflux under the conditions of carry out reaction 2h after, remove ethyl acetate and water, obtain mass fraction 91%
Phosphoric acid.It will be filtered to distillate phosphoric acid, and remove impurity, at 50 DEG C plus distilled water adjusts specific gravity, obtains mass concentration 85%
Phosphoric acid；
(4) when phosphoric acid cools down in 15 DEG C, 3% crystal seed, 0-5 DEG C of crystallizations is added, filtering obtains phosphoric acid crystal.By phosphoric acid crystalline substance
Body is diluted to 85% or more with distilled water, then is recrystallized with the same terms, and the phosphoric acid crystal 609.5g of electron level can be obtained, and returns
Yield is 90%, the industrial phosphoric acid that residual filtrate is 92%；
(5) nitric acid-acetic acid-water distillate is heated to 60 DEG C, under 80rpm stirring, be added and nitric acid equimolar matter
The neutralizer sodium acetate of amount, the concentration of sodium acetate is 0.03mol/L, volume 180mL, sufficiently agitation mixing.It is mixed after neutralization
It closes liquid directly to be distilled, collects acetic acid, raffinate is handled from bottom discharge.Water absorbing agent anhydrous slufuric acid is put into the acetic acid of recycling
Magnesium, filtering, can obtain the acetic acid 127.1g of 70% or more mass concentration, this process recovery rate 89%.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent process transformation made by bright specification and accompanying drawing content and combination are applied directly or indirectly in other relevant technology necks
Domain is included within the scope of the present invention.
Claims (7)
1. a kind of method for recycling phosphoric acid and acetic acid from waste aluminum etching solution, comprising the following steps:
(1) it will be evaporated under reduced pressure after waste aluminum etching solution decontamination, acetic acid and nitric acid removed in the way of fractionation, collection distillates
Liquid；
(2) esterification is carried out to which ethyl alcohol is added in distillate in step (1), removes remaining acetate in minute, and utilize and divide
The mode of evaporating removes ethyl acetate and ethyl alcohol, purifies phosphoric acid again；
(3) phosphoric acid that step (2) obtains is filtered plus distilled water obtains the phosphoric acid that mass concentration is 85% -89%, cooling, knot
Brilliant, filtering, obtains phosphoric acid crystal, filtrate is industrial phosphoric acid；
(4) nitric acid-acetic acid-water distillate is heated, stirring, the neutralizer of addition and nitric acid equimolar quality, hybrid reaction,
Mixed liquor after neutralization is directly distilled, and acetic acid is collected, and raffinate is handled from bottom discharge.
2. the method according to claim 1 for recycling phosphoric acid and acetic acid from waste aluminum etching solution, which is characterized in that step
Suddenly in (1) decontamination the specific steps are aluminium scrap etching solution is heated, stir, active carbon be added and is kept stirring 1.5-2h, while hot
It filters, the waste aluminum etching solution after collecting and impurity removing matter.
3. the method according to claim 1 for recycling phosphoric acid and acetic acid from waste aluminum etching solution, which is characterized in that step
Suddenly in (3), by mass concentration be 85%-89% phosphoric acid cooling in 10-15 DEG C when, be added 3% crystal seed, 0-5 DEG C of crystallizations,
Filtering, obtains phosphoric acid crystal.
4. the method according to claim 1 or 3 for recycling phosphoric acid and acetic acid from waste aluminum etching solution, feature exist
In, in step (3), obtained phosphoric acid crystal is diluted to 85% or more with distilled water, then cool down when 10-15 DEG C, be added
The phosphoric acid crystal of electron level can be obtained in 3% crystal seed, 0-5 DEG C of recrystallizations, filtering.
5. the method according to claim 1 for recycling phosphoric acid and acetic acid from waste aluminum etching solution, which is characterized in that step
Suddenly it in (4), to water absorbing agent is put into the acetic acid of recycling, filters, obtains the acetic acid that mass concentration is greater than 70%.
6. the method according to claim 5 for recycling phosphoric acid and acetic acid from waste aluminum etching solution, which is characterized in that institute
Stating water absorbing agent is anhydrous magnesium sulfate.
7. the method according to claim 1 for recycling phosphoric acid and acetic acid from waste aluminum etching solution, which is characterized in that step
Suddenly in (4), the neutralizer is acetate.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109942408A (en) * | 2019-03-24 | 2019-06-28 | 雒晓兵 | A kind of waste utilization method of useless etching mixed acid solution |
| CN110203898A (en) * | 2019-06-26 | 2019-09-06 | 陕西高科环保科技有限公司 | A kind of mixed acid waste liquor recovery method |
| CN110482572A (en) * | 2019-08-08 | 2019-11-22 | 湖北兴福电子材料有限公司 | A kind of classification recoverying and utilizing method of aluminium scrap etching solution |
| CN111591966A (en) * | 2020-04-20 | 2020-08-28 | 同济大学 | Device and method for recovering phosphoric acid in aluminum etching waste liquid |
| CN111960394A (en) * | 2020-08-19 | 2020-11-20 | 湖北兴福电子材料有限公司 | Method for recycling waste aluminum etching liquid |
| CN112520717A (en) * | 2020-12-04 | 2021-03-19 | 新中天环保股份有限公司 | Process for recycling waste phosphoric acid etching solution in photoelectric industry |
| CN113292056A (en) * | 2020-12-31 | 2021-08-24 | 清大国华环境集团股份有限公司 | Method for recovering phosphoric acid from waste aluminum etching solution |
| CN113716536A (en) * | 2021-11-02 | 2021-11-30 | 清大国华环境集团股份有限公司 | Recycling treatment method of acidic aluminum etching waste liquid |
| CN115028526A (en) * | 2022-06-18 | 2022-09-09 | 黄冈Tcl环境科技有限公司 | Method for treating secondary waste acid generated after evaporation of waste etching solution |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005324164A (en) * | 2004-05-17 | 2005-11-24 | Japan Science & Technology Agency | Method of separating and recovering acid from effluent mixed with multiple acids |
| CN1880216A (en) * | 2005-06-16 | 2006-12-20 | 台湾肥料股份有限公司 | Phosphoric acid purification and reuse method |
| CN101439849A (en) * | 2008-12-31 | 2009-05-27 | 孟庆深 | Comprehensive utilization process for waste aluminum etching solution |
| CN103979509A (en) * | 2014-04-28 | 2014-08-13 | 合肥茂腾环保科技有限公司 | Method for recycling phosphoric acid in aluminum scrap etching liquid |
| CN107973713A (en) * | 2017-12-25 | 2018-05-01 | 青岛科技大学 | A kind of method that acetic acid is recycled from nitric-acetic-nitrate mixed liquor |
-
2018
- 2018-08-07 CN CN201810890774.4A patent/CN109052355A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005324164A (en) * | 2004-05-17 | 2005-11-24 | Japan Science & Technology Agency | Method of separating and recovering acid from effluent mixed with multiple acids |
| CN1880216A (en) * | 2005-06-16 | 2006-12-20 | 台湾肥料股份有限公司 | Phosphoric acid purification and reuse method |
| CN101439849A (en) * | 2008-12-31 | 2009-05-27 | 孟庆深 | Comprehensive utilization process for waste aluminum etching solution |
| CN103979509A (en) * | 2014-04-28 | 2014-08-13 | 合肥茂腾环保科技有限公司 | Method for recycling phosphoric acid in aluminum scrap etching liquid |
| CN107973713A (en) * | 2017-12-25 | 2018-05-01 | 青岛科技大学 | A kind of method that acetic acid is recycled from nitric-acetic-nitrate mixed liquor |
Non-Patent Citations (1)
| Title |
|---|
| 李新柱 等: ""磷酸-乙酸混合溶液中萃取分离回收磷酸"", 《工业安全与环保》 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109942408A (en) * | 2019-03-24 | 2019-06-28 | 雒晓兵 | A kind of waste utilization method of useless etching mixed acid solution |
| CN110203898A (en) * | 2019-06-26 | 2019-09-06 | 陕西高科环保科技有限公司 | A kind of mixed acid waste liquor recovery method |
| CN110482572A (en) * | 2019-08-08 | 2019-11-22 | 湖北兴福电子材料有限公司 | A kind of classification recoverying and utilizing method of aluminium scrap etching solution |
| CN111591966A (en) * | 2020-04-20 | 2020-08-28 | 同济大学 | Device and method for recovering phosphoric acid in aluminum etching waste liquid |
| CN111591966B (en) * | 2020-04-20 | 2021-08-06 | 同济大学 | Device and method for recovering phosphoric acid in aluminum etching waste liquid |
| CN111960394A (en) * | 2020-08-19 | 2020-11-20 | 湖北兴福电子材料有限公司 | Method for recycling waste aluminum etching liquid |
| CN112520717A (en) * | 2020-12-04 | 2021-03-19 | 新中天环保股份有限公司 | Process for recycling waste phosphoric acid etching solution in photoelectric industry |
| CN113292056A (en) * | 2020-12-31 | 2021-08-24 | 清大国华环境集团股份有限公司 | Method for recovering phosphoric acid from waste aluminum etching solution |
| CN113716536A (en) * | 2021-11-02 | 2021-11-30 | 清大国华环境集团股份有限公司 | Recycling treatment method of acidic aluminum etching waste liquid |
| CN113716536B (en) * | 2021-11-02 | 2022-04-01 | 清大国华环境集团股份有限公司 | Recycling treatment method of acidic aluminum etching waste liquid |
| CN115028526A (en) * | 2022-06-18 | 2022-09-09 | 黄冈Tcl环境科技有限公司 | Method for treating secondary waste acid generated after evaporation of waste etching solution |
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Application publication date: 20181221 |