CN106045225A - Wastewater treatment technology for recycling acroleic acid and residual ester liquid - Google Patents
Wastewater treatment technology for recycling acroleic acid and residual ester liquid Download PDFInfo
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- CN106045225A CN106045225A CN201610609657.7A CN201610609657A CN106045225A CN 106045225 A CN106045225 A CN 106045225A CN 201610609657 A CN201610609657 A CN 201610609657A CN 106045225 A CN106045225 A CN 106045225A
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
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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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F1/24—Treatment of water, waste water, or sewage by flotation
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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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
- 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
- C02F1/70—Treatment of water, waste water, or sewage by reduction
- C02F1/705—Reduction by metals
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/36—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The invention discloses a wastewater treatment technology for recycling acroleic acid and residual ester liquid. The technology comprises the following steps that wastewater enters into a regulating tank; the wastewater is lifted to an air floatation tank by a water pump after the water quality, water amount and PH of the wastewater are regulated in the regulating tank; the wastewater suffering from the air flotation treatment flows into a reducing tank; high-valent metal ions are reduced to stable low-valent metal ions in the reducing tank, and then the wastewater with the stable low-valent metal ions flows into a neutralizing tank; the wastewater is neutralized in the neutralizing tank, and the metal ions suffer from precipitation reaction at the same time; when water is discharged, PAC (polyaluminium chloride) and PAM (polyacrylamide) are added for flocculation, and the wastewater enters into a flocculation sedimentation tank for sedimentation and separation; supernatant liquid and other produced wastewater are mixed, and then together enter into a hydrolytic acidification tank for pre-acidification; the pre-acidified wastewater flows into a bio-oxidation tank for aerobic treatment after PH and temperature adjustment; the mixed liquid from the bio-oxidation tank flows into a secondary sedimentation tank for solid-liquid separation; the supernatant liquid overflows, and drains out of a pipe network through a clean water tank. The technology disclosed by the invention has the advantages that the existing wastewater treatment technology is optimized and combined, the treatment technology is simple, the treatment quantity is large, and the treatment efficiency is high.
Description
Technical field
The present invention relates to a kind of acrylic acid and esters residual liquid recycles wastewater processing technology.
Background technology
Acrylicacidandesters is the industrial chemicals that a class is important, they can with self homopolymerization or with other vinyl monomers,
Such as copolymerization such as styrene, vinyl acetate, methyl methacrylate, acrylonitrile, vinyl chloride, make the acrylic acid of various different performance
Resinoid or polyacrylate, constitute oleic series chemical products.These products be widely used in weaving, chemical fibre, coating,
The industries such as leather, oil exploitation, binding agent, building materials, water process.Acrylic acid obtained the great attention of chemical industry circle in recent years,
Quickly grow, but have a large amount of waste water to produce simultaneously, containing acetic acid, methacrylic acid, acrylic acid, formaldehyde, acetaldehyde etc. in waste water
Organic substance, its COD (COD) up to several ten thousand～tens0000 mg/L, in highly acid, belong to high concentrated organic wastewater, feature
For concentration height, complicated component, poisonous and harmful etc., conventional process is more difficult.So-called COD, referring to can be oxidized in water body
Material carries out consuming during chemical oxidation the amount of oxygen, typically represents with the milligram number of every liter of water consumption oxygen, is the base of water quality monitoring
This aggregative indicator.Organic substance in water, when being decomposed by environment, can consume the dissolved oxygen in water.If the dissolved oxygen in water is disappeared
Consumption totally, will devote oneself to work, thus causes water body smelly and ecological deterioration by the anaerobe in water.Therefore COD value is the biggest, represents
Water body is contaminated the most serious.Contain therefore, it is necessary to a kind for the treatment of technology of research and development reduces COD in acrylicacidandesters class residual night
Amount.
Summary of the invention
For the technical problem of above-mentioned existence, it is an object of the invention to: propose a kind of high treating effect and low cost
Acrylic acid and esters residual liquid recycle wastewater processing technology.
The technical solution of the present invention is achieved in that a kind of acrylic acid and esters residual liquid recycle waste water and process
Technology, it carries out following steps process successively to acrylic acid and esters residual liquid:
1), the waste water that acrylic acid and esters residual liquid recycle device produce is flowed through grid by waste pipe and enter regulation
Pond, mixing regulation PH is 6-8；
2) waste water, after mixing regulation by water pump lifting to flotation tank, adds PAC, PAM and improves the treatment effect of air-dissolving air-float,
Waste water gravity flow after air-flotation process enters reduction pond；
3), add HCI make waste water PH at 3-4 in reduction pond, add FeSO simultaneously4High volence metal ion is reduced to stable
At a low price, then gravity flow enters neutralizing water tank；
4), add NaOH at neutralizing water tank, waste water is neutralized, carry out precipitation by metallic ion reaction simultaneously, add during water outlet
Flocculation sedimentation tank precipitate and separate is entered after PAC and PAM flocculation；
5), the supernatant in step (4) and the ground flushing water of process units collection, equipment cleaning water etc. sanitary wastewater are mixed
Enter hydrolysis acidification pool after conjunction together and carry out pre-acidified, acidification pool adds HCI and NaOH；
6) PH is adjusted to 6-9 by the waste water, after pre-acidified, and after temperature control is adjusted to room temperature, gravity flow enters bio-oxidation pond and carries out aerobic
Process；
7), bio-oxidation pond mixed liquor gravity flow entrance second pond carries out solid-liquid separation, supernatant overflow water outlet, row outside clear water reserviors
To pipe network.
Preferably, the mud in described second pond is divided into returned sludge and waste discharge mud；Described returned sludge is back to raw
In thing oxidation pond.
Preferably, described air supporting scum, flocculation sedimentation tank mud and second pond waste discharge mud respectively enter sludge concentration tank
Concentrating further, after concentration, mud screw pump is squeezed into pressure filter and is dehydrated, and the mud after dehydration carries out incineration disposal,
Sludge concentration tank supernatant and filter press clear liquid are from flowing into regulating reservoir.
Preferably, agitator is all used to mix in described regulating reservoir, reduction pond, neutralizing water tank and hydrolysis acidification pool
Homogenizing.
Due to the utilization of technique scheme, the present invention compared with prior art has the advantage that
The treatment technology of the present invention, is that the waste water producing acrylic acid and esters residual liquid recycle device is carried out at waste water again
Reason, the present invention re-starts optimum organization to existing waste water treatment process, mainly deletes traditional anaerobic reation pool, processes
Technique is simpler, and treating capacity is big, and treatment effeciency is high；Not only efficiently solve acrylic acid industry Sewage advanced treatment problem, will
Before processing, in water quality, COD drops to 1000mg/L from 5000mg/L, reaches chemical industry garden adapter discharge standard.And the whole series work of the present invention
The cost of investment of skill is low, and operation cost is low.The present invention is simple to operate, operation is convenient, be easily maintained management.
Accompanying drawing explanation
Below in conjunction with the accompanying drawings technical solution of the present invention is described further:
Accompanying drawing 1 is the process chart of the present invention.
Detailed description of the invention
The present invention is described below in conjunction with the accompanying drawings.
Embodiment one:
The acrylic acid of the present invention and esters residual liquid recycle wastewater processing technology, and acrylic acid and esters residual liquid are carried out by successively
Following steps process: 1), by waste pipe, the waste water that acrylic acid and esters residual liquid recycle device produce is flowed through grid
Entering regulating reservoir, regulation PH is 6；2), mix the waste water after regulating by water pump lifting to flotation tank, add PAC, PAM and improve molten
The pneumatically supported treatment effect of gas, the waste water gravity flow after air-flotation process enters reduction pond；3), add HCI in reduction pond and make waste water
PH, 3, adds FeSO4 simultaneously and high volence metal ion is reduced to stable low price, and then gravity flow enters neutralizing water tank；4), exist
Neutralizing water tank adds NaOH, is neutralized waste water, carries out precipitation by metallic ion reaction simultaneously, adds PAC and PAM wadding during water outlet
Flocculation sedimentation tank precipitate and separate is entered after Ning；The ground flushing water 5), the supernatant in step (4) and process units collected,
Enter hydrolysis acidification pool together after the mixing of the sanitary wastewater such as equipment cleaning water and carry out pre-acidified, add in acidification pool HCI and
NaOH；6) PH is adjusted to 6, after temperature control is adjusted to room temperature by the waste water, after pre-acidified, and gravity flow enters bio-oxidation pond and carries out aerobic place
Reason；7), bio-oxidation pond mixed liquor gravity flow entrance second pond carries out solid-liquid separation, supernatant overflow water outlet, row outside clear water reserviors
To pipe network.Mud in described second pond is divided into returned sludge and waste discharge mud；Described returned sludge is back to bio-oxidation pond
In.
Each Process for Effluent water quality parameter see table:
| Process section | PH | COD(mg/L) |
| Regulating reservoir | 6 | 5000 |
| Flotation tank | - | 4800 |
| Reduction pond | 3 | 4200 |
| Neutralizing water tank | - | 3650 |
| Flocculation sedimentation tank | - | 3380 |
| Hydrolysis acidification pool | 6 | 2900 |
| Bio-oxidation pond | - | 1250 |
| Second pond | - | 980 |
| Clear water reserviors | - | 950 |
Embodiment two:
The acrylic acid of the present invention and esters residual liquid recycle wastewater processing technology, and acrylic acid and esters residual liquid are carried out by successively
Following steps process: 1), by waste pipe, the waste water that acrylic acid and esters residual liquid recycle device produce is flowed through grid
Entering regulating reservoir, regulation PH is 7；2), mix the waste water after regulating by water pump lifting to flotation tank, add PAC, PAM and improve molten
The pneumatically supported treatment effect of gas, the waste water gravity flow after air-flotation process enters reduction pond；3), add HCI in reduction pond and make waste water
PH, 3.5, adds FeSO4 simultaneously and high volence metal ion is reduced to stable low price, and then gravity flow enters neutralizing water tank；4),
Add NaOH at neutralizing water tank, waste water is neutralized, carry out precipitation by metallic ion reaction simultaneously, during water outlet, add PAC and PAM
Flocculation sedimentation tank precipitate and separate is entered after flocculation；5), the ground flushing that the supernatant in step (4) and process units are collected
Enter hydrolysis acidification pool together and carry out pre-acidified after the mixing of the sanitary wastewater such as water, equipment cleaning water, add in acidification pool HCI and
NaOH；6) PH is adjusted to 9, after temperature control is adjusted to room temperature by the waste water, after pre-acidified, and gravity flow enters bio-oxidation pond and carries out aerobic place
Reason；7), bio-oxidation pond mixed liquor gravity flow entrance second pond carries out solid-liquid separation, supernatant overflow water outlet, row outside clear water reserviors
To pipe network.Mud in described second pond is divided into returned sludge and waste discharge mud；Described returned sludge is back to bio-oxidation pond
In.
Each Process for Effluent water quality parameter see table:
| Process section | PH | COD(mg/L) |
| Regulating reservoir | 7 | 5000 |
| Flotation tank | - | 4780 |
| Reduction pond | 3.5 | 4250 |
| Neutralizing water tank | - | 3580 |
| Flocculation sedimentation tank | - | 3400 |
| Hydrolysis acidification pool | 9 | 2850 |
| Bio-oxidation pond | - | 1150 |
| Second pond | - | 990 |
| Clear water reserviors | - | 960 |
Embodiment three:
The acrylic acid of the present invention and esters residual liquid recycle wastewater processing technology, and acrylic acid and esters residual liquid are carried out by successively
Following steps process: 1), by waste pipe, the waste water that acrylic acid and esters residual liquid recycle device produce is flowed through grid
Entering regulating reservoir, regulation PH is 8；2), mix the waste water after regulating by water pump lifting to flotation tank, add PAC, PAM and improve molten
The pneumatically supported treatment effect of gas, the waste water gravity flow after air-flotation process enters reduction pond；3), add HCI in reduction pond and make waste water
PH, 4, adds FeSO4 simultaneously and high volence metal ion is reduced to stable low price, and then gravity flow enters neutralizing water tank；4), exist
Neutralizing water tank adds NaOH, is neutralized waste water, carries out precipitation by metallic ion reaction simultaneously, adds PAC and PAM wadding during water outlet
Flocculation sedimentation tank precipitate and separate is entered after Ning；The ground flushing water 5), the supernatant in step (4) and process units collected,
Enter hydrolysis acidification pool together after the mixing of the sanitary wastewater such as equipment cleaning water and carry out pre-acidified, add in acidification pool HCI and
NaOH；6) PH is adjusted to 7.5, after temperature control is adjusted to room temperature by the waste water, after pre-acidified, and gravity flow enters bio-oxidation pond and carries out aerobic
Process；7), bio-oxidation pond mixed liquor gravity flow enter second pond carry out solid-liquid separation, supernatant overflow water outlet, outside clear water reserviors
Drain into pipe network.Mud in described second pond is divided into returned sludge and waste discharge mud；Described returned sludge is back to biological oxidation
Chi Zhong.
Each Process for Effluent water quality parameter see table:
| Process section | PH | COD(mg/L) |
| Regulating reservoir | 8 | 5000 |
| Flotation tank | - | 4930 |
| Reduction pond | 4 | 4260 |
| Neutralizing water tank | - | 3550 |
| Flocculation sedimentation tank | - | 3330 |
| Hydrolysis acidification pool | 7.5 | 2960 |
| Bio-oxidation pond | - | 1280 |
| Second pond | - | 1010 |
| Clear water reserviors | - | 980 |
The treatment technology of the present invention, is that the waste water producing acrylic acid and esters residual liquid recycle device is carried out at waste water again
Reason, processes technique simpler, and treating capacity is big, and treatment effeciency is high；Result of the test through repeatedly embodiment shows, before processing
In water quality, COD drops to below 1000mg/L from 5000mg/L, reaches chemical industry garden adapter discharge standard.
Further instruction, described air supporting scum, flocculation sedimentation tank mud and second pond waste discharge mud respectively enter mud
Concentration basin concentrates further, and after concentration, mud screw pump is squeezed into pressure filter and is dehydrated, and the mud after dehydration burns
Burning and dispose, sludge concentration tank supernatant and filter press clear liquid are from flowing into regulating reservoir.
Further instruction, all uses agitator to enter in described regulating reservoir, reduction pond, neutralizing water tank and hydrolysis acidification pool
Row mixing homogenizing.
Above-described embodiment, only for technology design and the feature of the explanation present invention, its object is to allow person skilled in the art
Scholar will appreciate that present disclosure and is carried out, and can not limit the scope of the invention with this, all according to the present invention
The equivalence that spirit is made changes or modifies, and all should contain within the scope of the present invention.
Claims (4)
1. an acrylic acid and esters residual liquid recycle wastewater processing technology, it is characterised in that it is to acrylic acid and esters residual liquid
Carry out following steps process successively:
1), the waste water that acrylic acid and esters residual liquid recycle device produce is flowed through grid by waste pipe and enter regulation
Pond, mixing regulation PH is 6-8；
2) waste water, after mixing regulation by water pump lifting to flotation tank, adds PAC, PAM and improves the treatment effect of air-dissolving air-float,
Waste water gravity flow after air-flotation process enters reduction pond；
3), add HCI make waste water PH at 3-4 in reduction pond, add FeSO simultaneously4High volence metal ion is reduced to stable
At a low price, then gravity flow enters neutralizing water tank；
4), add NaOH at neutralizing water tank, waste water is neutralized, carry out precipitation by metallic ion reaction simultaneously, add during water outlet
Flocculation sedimentation tank precipitate and separate is entered after PAC and PAM flocculation；
5), the supernatant in step (4) and the ground flushing water of process units collection, equipment cleaning water etc. sanitary wastewater are mixed
Enter hydrolysis acidification pool after conjunction together and carry out pre-acidified, acidification pool adds HCI and NaOH；
6) PH is adjusted to 6-9 by the waste water, after pre-acidified, and after temperature control is adjusted to room temperature, gravity flow enters bio-oxidation pond and carries out aerobic
Process；
7), bio-oxidation pond mixed liquor gravity flow entrance second pond carries out solid-liquid separation, supernatant overflow water outlet, row outside clear water reserviors
To pipe network.
Acrylic acid the most according to claim 1 and esters residual liquid recycle wastewater processing technology, it is characterised in that: described
Mud in second pond is divided into returned sludge and waste discharge mud；Described returned sludge is back in bio-oxidation pond.
Acrylic acid the most according to claim 2 and esters residual liquid recycle wastewater processing technology, it is characterised in that: described
Air supporting scum, flocculation sedimentation tank mud and second pond waste discharge mud respectively enter sludge concentration tank and concentrate further, concentrate
Rear mud screw pump is squeezed into pressure filter and is dehydrated, and the mud after dehydration carries out incineration disposal, sludge concentration tank supernatant and
Filter press clear liquid is from flowing into regulating reservoir.
Acrylic acid the most according to claim 1 and esters residual liquid recycle wastewater processing technology, it is characterised in that: described
Agitator is all used to carry out mixing homogenizing in regulating reservoir, reduction pond, neutralizing water tank and hydrolysis acidification pool.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107176764A (en) * | 2017-07-07 | 2017-09-19 | 南京福昌环保有限公司 | A kind of method of wastewater treatment |
| CN108927280A (en) * | 2017-05-26 | 2018-12-04 | 映诚股份有限公司 | Bottom slag washing and sorting system |
| CN110902963A (en) * | 2019-12-10 | 2020-03-24 | 九江天赐高新材料有限公司 | Treatment method of alkali-soluble polymer-containing wastewater |
| CN111807647A (en) * | 2020-08-11 | 2020-10-23 | 苏州聚智同创环保科技有限公司 | Advanced treatment system and method for acrylic acid wastewater |
| CN113354197A (en) * | 2021-06-08 | 2021-09-07 | 江苏利田科技股份有限公司 | Biochemical treatment method and system for acrylic ester production wastewater |
| CN114621081A (en) * | 2022-02-22 | 2022-06-14 | 青岛农业大学 | Method for preparing acrylic acid by using acrylate waste |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108927280A (en) * | 2017-05-26 | 2018-12-04 | 映诚股份有限公司 | Bottom slag washing and sorting system |
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| CN107176764A (en) * | 2017-07-07 | 2017-09-19 | 南京福昌环保有限公司 | A kind of method of wastewater treatment |
| CN110902963A (en) * | 2019-12-10 | 2020-03-24 | 九江天赐高新材料有限公司 | Treatment method of alkali-soluble polymer-containing wastewater |
| CN111807647A (en) * | 2020-08-11 | 2020-10-23 | 苏州聚智同创环保科技有限公司 | Advanced treatment system and method for acrylic acid wastewater |
| CN113354197A (en) * | 2021-06-08 | 2021-09-07 | 江苏利田科技股份有限公司 | Biochemical treatment method and system for acrylic ester production wastewater |
| CN114621081A (en) * | 2022-02-22 | 2022-06-14 | 青岛农业大学 | Method for preparing acrylic acid by using acrylate waste |
| CN114621081B (en) * | 2022-02-22 | 2023-08-22 | 青岛农业大学 | Method for preparing acrylic acid by utilizing acrylate waste |
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Application publication date: 20161026 |