CN106186147B - Recovery treatment method of high-concentration organic acid wastewater - Google Patents
Recovery treatment method of high-concentration organic acid wastewater Download PDFInfo
- Publication number
- CN106186147B CN106186147B CN201610595824.7A CN201610595824A CN106186147B CN 106186147 B CN106186147 B CN 106186147B CN 201610595824 A CN201610595824 A CN 201610595824A CN 106186147 B CN106186147 B CN 106186147B
- Authority
- CN
- China
- Prior art keywords
- organic acid
- agent
- wastewater
- complexing
- extraction
- 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.)
- Active
Links
Classifications
-
- 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
- C02F1/26—Treatment of water, waste water, or sewage by extraction
-
- 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
- C02F2101/34—Organic compounds containing oxygen
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Physical Water Treatments (AREA)
- Removal Of Specific Substances (AREA)
Abstract
The invention provides a method for recycling high-concentration organic acid wastewater. The recovery processing method comprises the steps of carrying out complexing extraction on the high-concentration organic acid wastewater by using a complexing extraction agent in an acidic environment, standing and layering to obtain an extraction phase and a water phase; and then, adding an analytical agent into the obtained extraction phase to regenerate the complexing extraction agent, standing and layering after mixing reaction to obtain concentrated solution containing organic acid and regenerated complexing extraction agent. The recovery processing method can simultaneously recover the organic acid raw material in the wastewater and directly apply the organic acid raw material to the production process. The wastewater after recovery treatment can be directly subjected to conventional biochemical treatment and is stably discharged after reaching standards.
Description
Technical Field
The invention relates to the field of fine chemical wastewater treatment, in particular to a recovery treatment method of high-concentration organic acid wastewater.
Background
Organic acids refer to some organic compounds that have an acidic character. A common organic acid is a carboxylic acid, the acidity of which is derived from the carboxyl group (-COOH). The organic acid has various types and wide application. Some of these organic acids are used as raw materials and intermediates for the synthesis of pharmaceuticals and pesticides. Therefore, along with the production of medicines and pesticides, a large amount of wastewater containing organic acids at high concentration is produced, and the wastewater has high organic matter concentration and is mostly biologically toxic, causing disturbance of biochemical system and even death of activated sludge in large quantity.
The commonly used methods for treating organic acid wastewater at present comprise a physicochemical method, a chemical oxidation method, a membrane separation technology and a biochemical method. The invention discloses a method for treating high-concentration mixed organic acid wastewater, which aims at treating the high-concentration mixed organic acid wastewater generated by a maleic anhydride production system by adopting a secondary flocculation precipitation-secondary membrane separation-evaporation concentration combined process route, wherein the treated wastewater reaches the national primary discharge standard. In the invention, secondary flocculation and secondary membrane separation are alternately carried out, the types of flocculating agents added in the flocculation process are as many as 7, and various filtration modes such as active sand filtration, charcoal filtration, ultrafiltration, nanofiltration, reverse osmosis and the like are adopted, so that the treatment process is complicated, the investment, operation and equipment maintenance cost is high, and the method has no industrial prospect.
The patent CN101570381A discloses an organic acid wastewater treatment method and system, aiming at PTA acetic acid wastewater, anaerobic-aerobic treatment is adopted in sequence under an acid condition. The amount of the neutralizing alkali in the wastewater is reduced. The method has limited application range, is more suitable for acetic acid, and is difficult to effectively treat organic acid wastewater with complex chemical structure and biotoxicity.
Therefore, a new treatment method is needed, which can effectively recover organic acid from wastewater and achieve the effects of non-toxic and resource utilization of wastewater.
Disclosure of Invention
The invention aims to provide a method for recovering and treating high-concentration organic acid wastewater, which can simultaneously recover organic acid raw materials in the wastewater and directly apply the organic acid raw materials to a production process. The wastewater after recovery treatment can be directly subjected to conventional biochemical treatment and is stably discharged after reaching standards.
In order to achieve the purpose, the invention firstly provides a method for recovering and treating high-concentration organic acid wastewater, which comprises the steps of performing complexing extraction on the high-concentration organic acid wastewater by using a complexing extraction agent in an acid environment, and standing for layering to obtain an extract phase and a water phase; then, adding an analytical agent into the obtained extraction phase to regenerate the complexing extraction agent, standing and layering after mixing reaction to obtain concentrated solution containing organic acid and regenerated complexing extraction agent; the complexing extraction agent comprises a complexing agent and a diluent, wherein the complexing agent is selected from one or a mixture of trioctylphosphine oxide and N-lauryl (trialkyl methyl) amine, and the diluent is selected from one of aviation kerosene or diesel oil.
In an embodiment of the present invention, the complexing agent accounts for 24-48% of the volume of the complexing extractant.
In an embodiment of the present invention, the resolving agent is a sodium hydroxide solution. Preferably, the mass fraction of the sodium hydroxide solution is 12%.
In one embodiment of the invention, the volume ratio of the complexing extraction agent to the high-concentration organic acid wastewater of the high-concentration organic acid wastewater is 1 (5-8).
In one embodiment of the invention, in the regeneration of the complexing extraction agent, the volume ratio of the sodium hydroxide solution to the extraction phase is 1 (4-6).
In an embodiment of the present invention, the acidic environment is a pH value in a range of 3 to 5.
In an embodiment of the invention, the complex extraction reaction time of the complex extracting agent and the high-concentration organic acid wastewater is 30-60 minutes.
In an embodiment of the present invention, the regeneration reaction time of the complexing extractant of the extraction phase and the sodium hydroxide solution is 30 to 60 minutes.
In a preferred embodiment of the present invention, a method for recycling high concentration organic acid wastewater is provided, which comprises the following steps: s10, complex extraction: adjusting the pH value of the high-concentration organic acid wastewater to enable the pH value of the high-concentration organic acid wastewater to be 3-5, adding a complexing extraction agent into the high-concentration organic acid wastewater in a volume ratio of the complexing extraction agent to the high-concentration organic acid wastewater of 1 (5-8) by taking a mixed solution of the complexing agent and a diluent as the complexing extraction agent, carrying out a complexing extraction reaction for 30-60 minutes, and standing for layering to obtain an extraction phase and a water phase; s20, regeneration of a complexing extraction agent: taking the extract phase obtained in the step S10, adding a resolving agent into the extract phase according to the volume ratio of the resolving agent to the extract phase of 1 (4-6), carrying out mixing reaction for 30-60 minutes, standing for layering, wherein the lower layer is a concentrated solution containing organic acid, and the upper layer is a regenerated complexing extracting agent; wherein the analysis agent is a sodium hydroxide solution with the mass fraction of 12%.
In an embodiment of the present invention, the complexing agent accounts for 24-48% of the volume of the complexing extractant.
In one embodiment of the present invention, the concentrated solution containing organic acid can be recycled to the chemical production process, and the regenerated complex extractant can be reused in step S10.
According to the invention, by selecting a proper extracting agent and a complexing extraction process, the COD removal rate of the high-concentration organic acid wastewater treated by the treatment method disclosed by the invention is 50-70%, and the removal rate of the organic acid can reach 99%. The high-concentration organic acid wastewater (namely the water phase in the step S10) treated by the method has biodegradability, and each index after A/O biochemical treatment can reach the first level of Integrated wastewater discharge Standard (GB 10-96). In addition, the complexing extraction agent in the method can be repeatedly used, so that the problem of secondary pollution caused by wastewater treatment is avoided, and the cost of wastewater treatment is further reduced.
Compared with the prior art, the recovery processing method has the following advantages:
1. the removal rate of the organic acid can reach 99%, the removal rate of COD can reach 50-70%, the biodegradability of the wastewater is improved, the stability of the subsequent biochemical treatment effect is ensured, and the biochemical effluent reaches the standard and is discharged.
2. The concentrated solution containing organic acid extracted from the waste water has main components of organic acid which is difficult to degrade, such as pivalic acid, (R) - (+) -2- (4-hydroxyphenoxy) propionic acid, cyhalothrin acid and the like, can be used as a raw material for producing pesticide intermediates, and can be directly reused in a production section, thereby reducing the production cost and having obvious economic benefit.
3. The method has the advantages of simple operation method, no need of temperature rise, low equipment investment and operation cost, accordance with the requirements of energy conservation and environmental protection, and better industrial popularization value.
Detailed Description
Hereinafter, the technique of the present invention will be described in detail with reference to specific embodiments. It should be understood that the following detailed description is only for the purpose of assisting those skilled in the art in understanding the present invention, and is not intended to limit the present invention.
Example 1
In this embodiment, a method for recovering and treating high-concentration organic acid wastewater is provided, which is referred to as pivaloyl chloride wastewater in pivaloyl chloride production workshops of pharmaceutical factories in zhejiang, and the water quality of raw water: pH 3, COD: 41035mg/L, pivalic acid concentration: 13855mg/L has pungent smell.
The method specifically comprises the following steps.
Step S10, complex extraction: firstly, in the embodiment, trioctylphosphine oxide is used as an extracting agent, aviation kerosene is used as a diluent, the volume ratio of the trioctylphosphine oxide to the aviation kerosene is 1:4, and the trioctylphosphine oxide and the aviation kerosene are uniformly mixed to obtain the complex extracting agent. Taking 3L of the pivaloyl chloride wastewater, adding 600mL of the complexing extraction agent, mixing and reacting for 30 minutes, standing and layering to obtain an extract phase and a water phase. And (3) sending the extract phase into an extractant regenerating device for regeneration, wherein the water phase is the wastewater after the removal of the pivalic acid, and sampling and analyzing.
S20, regeneration of a complexing extraction agent: and (4) adding the extraction phase obtained in the step (S10) and a sodium hydroxide solution with the mass fraction of 12% into the extractant regenerating device according to the volume ratio of 5:1, reacting for 30 minutes, standing, and carrying out phase separation to obtain a regenerated extractant and an organic acid concentrated solution. The component of the organic acid concentrated solution is mainly sodium pivalate, the concentration is 351066mg/L, which is equivalent to about 35% by mass fraction, and the organic acid concentrated solution can be reused as a production raw material in a pivaloyl chloride production section. The regenerated extractant is reused in step S10.
The quality of the treated wastewater (i.e., the aqueous phase obtained in step S10) was measured: COD: 12085mg/L, the removal rate is 70.5%; concentration of pivalic acid: 40mg/L, and the removal rate is 99.7 percent. The water quality has biodegradability, and various indexes of the water after A/O biochemical treatment can reach the first level of Integrated wastewater discharge Standard (GB 8978-96).
Example 2
In this example, a method for removing aniline substances from high concentration organic acid wastewater is provided, wherein the treatment object is obtained from a production plant of methyl (R) - (+) -2- (4-hydroxyphenoxy) propionate from a Shandong farm chemical factory, and is hereinafter referred to as methyl (R) - (+) -2- (4-hydroxyphenoxy) propionate wastewater, and the water quality of raw water: pH 7, COD: 24490mg/L, concentration of (R) - (+) -2- (4-hydroxyphenoxy) propionic acid: 6704 mg/L.
The method specifically comprises the following steps.
Step S10, complex extraction: firstly, in this example, N-laurel (trialkylmethyl) amine is used as an extractant, diesel oil is used as a diluent, and the volume ratio of the N-laurel (trialkylmethyl) amine to the diesel oil is 24:76, and the complex extractant is obtained after the two are uniformly mixed. Taking 3L of (R) - (+) -2- (4-hydroxyphenoxy) methyl propionate wastewater, adjusting the pH value of the wastewater to be 3-5, adding 500mL of the complex extracting agent, mixing and reacting for 60 minutes, standing and layering to obtain an extract phase and a water phase. And (3) feeding the extract phase into an extractant regenerating device for regeneration, wherein the water phase is the wastewater after the (R) - (+) -2- (4-hydroxyphenoxy) propionic acid is removed, and sampling and analyzing.
S20, regeneration of a complexing extraction agent: and (4) adding the extraction phase obtained in the step (S10) and a sodium hydroxide solution with the mass fraction of 12% into the extractant regenerating device according to the volume ratio of 5:1, reacting for 30 minutes, standing, and carrying out phase separation to obtain a regenerated extractant and an organic acid concentrated solution. The organic acid concentrated solution mainly comprises (R) - (+) -2- (4-hydroxyphenoxy) sodium propionate, the concentration is 195530mg/L, the mass fraction is about 25%, and the organic acid concentrated solution can be used as a production raw material for a production section of (R) - (+) -2- (4-hydroxyphenoxy) methyl propionate. The regenerated extractant is reused for next wastewater extraction.
The quality of the treated wastewater (i.e., the aqueous phase obtained in step S10) was measured: COD: 6483mg/L, the removal rate is 73.5%; (R) - (+) -2- (4-hydroxyphenoxy) propionic acid concentration: 10mg/L, and the removal rate is 99.8 percent. The water quality has biodegradability, and various indexes of the water after A/O biochemical treatment can reach the first level of Integrated wastewater discharge Standard (GB 8978-96).
Example 3
In this embodiment, a method for removing aniline substances from high-concentration organic acid wastewater is provided, wherein the treatment object is taken from a bifenthrin production workshop of a certain agricultural chemical plant in Jiangsu, and is hereinafter referred to as bifenthrin wastewater, and the water quality condition of raw water: pH 3, COD: 49606mg/L, concentration of Cyhalofuginic acid: 10399mg/L, has pungent smell.
The method specifically comprises the following steps.
Step S10, complex extraction: firstly, in the embodiment, trioctylphosphine oxide is used as an extracting agent, aviation kerosene is used as a diluent, the volume ratio of the trioctylphosphine oxide to the aviation kerosene is 48:52, and the complex extracting agent is obtained after the trioctylphosphine oxide and the aviation kerosene are uniformly mixed. And taking 3L of bifenthrin wastewater, adding 600mL of the complex extracting agent, mixing and reacting for 45 minutes, standing and layering to obtain an extract phase and a water phase. And (3) sending the extract phase into an extractant regenerating device for regeneration, wherein the water phase is the wastewater after the removal of the kungfu acid, and sampling and analyzing.
S20, regeneration of a complexing extraction agent: and (4) adding the extraction phase obtained in the step (S10) and a sodium hydroxide solution with the mass fraction of 12% into the extractant regenerating device according to the volume ratio of 4:1, reacting for 30 minutes, standing, and carrying out phase separation to obtain a regenerated extractant and an organic acid concentrated solution. The organic acid concentrated solution mainly comprises the components of naphthol AS-LC, the concentration of sodium cyhalofop-butyl is 207980mg/L, the mass fraction is about 20%, and the organic acid concentrated solution can be used AS a production raw material for a bifenthrin production section. The regenerated extractant is reused for next wastewater extraction.
The quality of the treated wastewater (i.e., the aqueous phase obtained in step S10) was measured: COD: 23655mg/L, and the removal rate is 52.3%; concentration of the kongfu acid: 15mg/L, and the removal rate is 99.8 percent. The water quality has biodegradability, and various indexes of the water after A/O biochemical treatment can reach the first level of Integrated wastewater discharge Standard (GB 8978-96).
Example 4
In this example, a method for removing aniline substances from high-concentration organic acid wastewater was provided, and the treatment object was the same as in example 1.
The method specifically comprises the following steps.
Step S10, complex extraction: firstly, in the embodiment, N-laurel (trialkyl methyl) amine is used as an extracting agent, aviation kerosene is used as a diluent, the volume ratio of dibutyl butyl phosphate to diesel oil is 3:7, and the two are uniformly mixed to obtain the complexing extracting agent. Taking 3L of the pivaloyl chloride wastewater, adding 400mL of the complexing extraction agent, mixing and reacting for 30 minutes, standing and layering to obtain an extract phase and a water phase. And (3) sending the extract phase into an extractant regenerating device for regeneration, wherein the water phase is the wastewater after the removal of the pivalic acid, and sampling and analyzing.
S20, regeneration of a complexing extraction agent: and (4) adding the extraction phase obtained in the step (S10) and a sodium hydroxide solution with the mass fraction of 12% into the extractant regenerating device according to the volume ratio of 4:1, reacting for 60 minutes, standing, and carrying out phase separation to obtain a regenerated extractant and an organic acid concentrated solution. The organic acid concentrated solution mainly contains sodium pivalate, the concentration is 329760mg/L, the mass fraction is about 33%, and the organic acid concentrated solution can be used as a production raw material for pivaloyl chloride production. The regenerated extractant is reused for next wastewater extraction.
The quality of the treated wastewater (i.e., the aqueous phase obtained in step S10) was measured: COD: 12474mg/L, the removal rate is 69.6%; concentration of pivalic acid: 42mg/L, and the removal rate is 99.7 percent. The water quality has biodegradability, and various indexes of the water after A/O biochemical treatment can reach the first level of Integrated wastewater discharge Standard (GB 8978-96).
Example 5
In this example, a method for removing aniline substances from high-concentration organic acid wastewater is provided, the treatment target is (R) - (+) -2- (4-hydroxyphenoxy) methyl propionate wastewater, and the raw water quality: pH 7, COD: 24490mg/L, concentration of (R) - (+) -2- (4-hydroxyphenoxy) propionic acid: 6704 mg/L.
The method specifically comprises the following steps.
Step S10, complex extraction: firstly, in this example, trioctylphosphine oxide is used as an extractant, diesel oil is used as a diluent, and the volume ratio of the trioctylphosphine oxide to the diesel oil is 28:72, and the complex extractant is obtained after the trioctylphosphine oxide and the diesel oil are uniformly mixed. Taking 3L of (R) - (+) -2- (4-hydroxyphenoxy) methyl propionate wastewater, adjusting the pH value of the wastewater to be 3-5, adding 450mL of the complex extracting agent, mixing and reacting for 45 minutes, standing and layering to obtain an extract phase and a water phase. And (3) feeding the extract phase into an extractant regenerating device for regeneration, wherein the water phase is the wastewater after the (R) - (+) -2- (4-hydroxyphenoxy) propionic acid is removed, and sampling and analyzing.
S20, regeneration of a complexing extraction agent: and (4) adding the extraction phase obtained in the step (S10) and a sodium hydroxide solution with the mass fraction of 12% into the extractant regenerating device according to the volume ratio of 6:1, reacting for 30 minutes, standing, and carrying out phase separation to obtain a regenerated extractant and an organic acid concentrated solution. The organic acid concentrated solution mainly comprises (R) - (+) -2- (4-hydroxyphenoxy) sodium propionate, the concentration is 195530mg/L, the mass fraction is about 20%, and the organic acid concentrated solution can be used as a production raw material for a production section of (R) - (+) -2- (4-hydroxyphenoxy) methyl propionate. The regenerated extractant is reused for next wastewater extraction.
The quality of the treated wastewater (i.e., the aqueous phase obtained in step S10) was measured: COD: 6591mg/L, removal rate 73.1%; (R) - (+) -2- (4-hydroxyphenoxy) propionic acid concentration: 15mg/L, and the removal rate is 99.8 percent. The water quality has biodegradability, and various indexes of the water after A/O biochemical treatment can reach the first level of Integrated wastewater discharge Standard (GB 8978-96).
According to the invention, by selecting a proper extracting agent and a complexing extraction process, the COD removal rate of the high-concentration organic acid wastewater treated by the treatment method disclosed by the invention is 50-70%, and the removal rate of the organic acid can reach 99%. The high-concentration organic acid wastewater (namely the water phase in the step S10) treated by the method has biodegradability, and each index after A/O biochemical treatment can reach the first level of Integrated wastewater discharge Standard (GB 10-96). In addition, the complexing extraction agent in the method can be repeatedly used, so that the problem of secondary pollution caused by wastewater treatment is avoided, and the cost of wastewater treatment is further reduced.
The present invention has been described in relation to the above embodiments, which are only exemplary of the implementation of the present invention. It must be noted that the disclosed embodiments do not limit the scope of the invention. Rather, modifications and equivalent arrangements included within the spirit and scope of the claims are included within the scope of the invention.
Claims (8)
1. A recovery processing method of high-concentration organic acid wastewater, wherein the organic acid is pivalic acid, (R) - (+)2- (4-hydroxyphenoxy) propionic acid or cyhalothrin acid, is characterized in that the recovery processing method comprises the steps of performing complex extraction on the high-concentration organic acid wastewater by using a complex extracting agent in an acidic environment, and obtaining an extract phase and a water phase after standing and layering; then, adding an analytical agent into the obtained extraction phase to regenerate the complexing extraction agent, standing and layering after mixing reaction to obtain concentrated solution containing organic acid and regenerated complexing extraction agent; the complexing extraction agent comprises a complexing agent and a diluent, wherein the complexing agent is N-lauryl (trialkyl methyl) amine or the mixture of trioctyl phosphine oxide and N-lauryl (trialkyl methyl) amine, and the diluent is selected from one of aviation kerosene or diesel oil; and the complexing agent accounts for 24-48% of the volume of the complexing extractant.
2. The method of claim 1, wherein the resolving agent is a sodium hydroxide solution.
3. The method of claim 1, wherein the volume ratio of the complexing extraction agent to the high-concentration organic acid wastewater is 1 (5-8).
4. The method of claim 1, wherein the volume ratio of the resolving agent to the extraction phase in the regeneration of the complexing extractant is 1 (4-6).
5. The method of claim 1, wherein the acidic environment is a pH in the range of 3 to 5.
6. The method of claim 2, wherein the sodium hydroxide solution is present in a 12% by weight fraction.
7. The method according to claim 1, wherein the complex extraction reaction time of the complex extracting agent and the high-concentration organic acid wastewater is 30-60 minutes.
8. The method of claim 1, wherein the complex extractant regeneration reaction time of the extraction phase and the resolving agent is 30-60 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610595824.7A CN106186147B (en) | 2016-07-26 | 2016-07-26 | Recovery treatment method of high-concentration organic acid wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610595824.7A CN106186147B (en) | 2016-07-26 | 2016-07-26 | Recovery treatment method of high-concentration organic acid wastewater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106186147A CN106186147A (en) | 2016-12-07 |
| CN106186147B true CN106186147B (en) | 2020-05-19 |
Family
ID=57495922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610595824.7A Active CN106186147B (en) | 2016-07-26 | 2016-07-26 | Recovery treatment method of high-concentration organic acid wastewater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106186147B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110228867B (en) * | 2019-06-25 | 2021-09-14 | 北京惠宇乐邦环保科技有限公司 | Pretreatment method of waste water from production of kungfu acid |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1125630A (en) * | 1995-08-28 | 1996-07-03 | 山东大学 | Purification method of by-product hydrobromic acid |
| CN1309092A (en) * | 2001-03-16 | 2001-08-22 | 清华大学 | Complex extraction process for pre-treating waste water for intermediate of sulfornic dyes |
| CN1403381A (en) * | 2001-09-11 | 2003-03-19 | 中国石油天然气股份有限公司 | Process of recovering organic acid from waste alkali liquor |
| CN101322917A (en) * | 2008-07-09 | 2008-12-17 | 江南大学 | Process for recycling organics acids from sludge anaerobic acidification mixed liquor |
| CN102241580A (en) * | 2011-01-07 | 2011-11-16 | 长春工业大学 | Method for recovering organic carboxylic acids from corn chemical alcohol reaction kettle residues by utilizing complex extraction |
| CN103803753A (en) * | 2014-02-28 | 2014-05-21 | 南京大学盐城环保技术与工程研究院 | Comprehensive recovery treatment method for H acid industrial waste water |
| CN105017003A (en) * | 2014-04-30 | 2015-11-04 | 财团法人工业技术研究院 | Process for purifying organic acids |
-
2016
- 2016-07-26 CN CN201610595824.7A patent/CN106186147B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1125630A (en) * | 1995-08-28 | 1996-07-03 | 山东大学 | Purification method of by-product hydrobromic acid |
| CN1309092A (en) * | 2001-03-16 | 2001-08-22 | 清华大学 | Complex extraction process for pre-treating waste water for intermediate of sulfornic dyes |
| CN1403381A (en) * | 2001-09-11 | 2003-03-19 | 中国石油天然气股份有限公司 | Process of recovering organic acid from waste alkali liquor |
| CN101322917A (en) * | 2008-07-09 | 2008-12-17 | 江南大学 | Process for recycling organics acids from sludge anaerobic acidification mixed liquor |
| CN102241580A (en) * | 2011-01-07 | 2011-11-16 | 长春工业大学 | Method for recovering organic carboxylic acids from corn chemical alcohol reaction kettle residues by utilizing complex extraction |
| CN103803753A (en) * | 2014-02-28 | 2014-05-21 | 南京大学盐城环保技术与工程研究院 | Comprehensive recovery treatment method for H acid industrial waste water |
| CN105017003A (en) * | 2014-04-30 | 2015-11-04 | 财团法人工业技术研究院 | Process for purifying organic acids |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106186147A (en) | 2016-12-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106282585B (en) | A kind of detoxification classification resource utilization method of domestic garbage incineration flyash | |
| CN102211795A (en) | Method for regenerating eluant in organic polluted soil eluent | |
| CN106186147B (en) | Recovery treatment method of high-concentration organic acid wastewater | |
| DE10005681B4 (en) | Method and device for the decontamination of metal-containing waters | |
| CN105417888B (en) | A kind of Clindamycin Hydrochloride waste water treatment process | |
| Kida et al. | Study on the suitability of using low-frequency ultrasonic field for removing di (2-ethylhexyl) phthalate from bottom sediments | |
| Li et al. | Hydrothermal liquefaction of sewage sludge and model compound: Heavy metals distribution and behaviors | |
| CN107129019B (en) | Treatment method of phenol-containing wastewater | |
| CN111977919A (en) | Method for treating heavy metal polluted bottom mud by utilizing ultrasonic wave-composite acid extraction-chemical precipitation | |
| CN105797568B (en) | A method of utilizing spent organic solvent composite denitration agent | |
| Jin et al. | Distribution of Pb and its chemical fractions in liquid and solid phases of digested pig and dairy slurries | |
| CN106315731A (en) | Method for producing nickel oxide from nickel-plating wastewater | |
| CN102642946B (en) | Treatment method of waste water produced in process for producing caprolactam by utilizing toluene method | |
| KR100523518B1 (en) | Zero discharge system of water treatment sludge through Alum recovery and reuse as a daily landfill cover soil | |
| CN105731682A (en) | System and method for treating acetic acid-containing wastewater | |
| CN100494080C (en) | Purifying method for producing regenerative acid during light benzene processing and washing | |
| CN105152874A (en) | Method for producing dipropylene glycol methylether | |
| CN204550495U (en) | waste hydraulic oil filter regeneration system | |
| CN105174348A (en) | Separation method for strong-polarity organic matter molecules in coking wastewater | |
| CN111470649A (en) | Recovery treatment method of industrial acidic wastewater | |
| CN110523767B (en) | Method for extracting soil heavy metals by using livestock and poultry manure hydrothermal carbonization waste liquid | |
| CN221254274U (en) | Treatment system for wastewater generated in process of extracting phenolic compounds from coal tar | |
| DE4317338A1 (en) | Process for decontaminating polluted soils, sludges, ashes, sediments or the like | |
| CN214222740U (en) | Liquid ammonia tank car residual ammonia and processing apparatus of dirt | |
| KR101247224B1 (en) | Method for remediating soil contaminated with zinc using solvent extraction and thereof system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |