CN102583863B - Wastewater treatment method for unsaturated polyester resin - Google Patents
Wastewater treatment method for unsaturated polyester resin Download PDFInfo
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- CN102583863B CN102583863B CN 201210043945 CN201210043945A CN102583863B CN 102583863 B CN102583863 B CN 102583863B CN 201210043945 CN201210043945 CN 201210043945 CN 201210043945 A CN201210043945 A CN 201210043945A CN 102583863 B CN102583863 B CN 102583863B
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- 229920006337 unsaturated polyester resin Polymers 0.000 title claims abstract description 28
- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 44
- 239000002351 wastewater Substances 0.000 claims abstract description 37
- 238000004821 distillation Methods 0.000 claims abstract description 18
- 239000000126 substance Substances 0.000 claims abstract description 17
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000001301 oxygen Substances 0.000 claims abstract description 15
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 15
- 239000007788 liquid Substances 0.000 claims abstract description 9
- 238000012856 packing Methods 0.000 claims abstract description 6
- 239000010865 sewage Substances 0.000 claims abstract description 6
- 239000012065 filter cake Substances 0.000 claims abstract description 4
- 229910052751 metal Inorganic materials 0.000 claims abstract description 4
- 239000002184 metal Substances 0.000 claims abstract description 4
- 150000003839 salts Chemical class 0.000 claims abstract description 4
- 238000000926 separation method Methods 0.000 claims abstract description 3
- 239000011800 void material Substances 0.000 claims abstract description 3
- 238000003860 storage Methods 0.000 claims description 20
- 238000002156 mixing Methods 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 16
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 15
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 15
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 15
- 239000004571 lime Substances 0.000 claims description 15
- 238000012546 transfer Methods 0.000 claims description 15
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims description 12
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 8
- LGRFSURHDFAFJT-UHFFFAOYSA-N Phthalic anhydride Natural products C1=CC=C2C(=O)OC(=O)C2=C1 LGRFSURHDFAFJT-UHFFFAOYSA-N 0.000 claims description 5
- JHIWVOJDXOSYLW-UHFFFAOYSA-N butyl 2,2-difluorocyclopropane-1-carboxylate Chemical compound CCCCOC(=O)C1CC1(F)F JHIWVOJDXOSYLW-UHFFFAOYSA-N 0.000 claims description 5
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 claims description 5
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 5
- PPWUTZVGSFPZOC-UHFFFAOYSA-N 1-methyl-2,3,3a,4-tetrahydro-1h-indene Chemical class C1C=CC=C2C(C)CCC21 PPWUTZVGSFPZOC-UHFFFAOYSA-N 0.000 claims description 4
- HECLRDQVFMWTQS-RGOKHQFPSA-N 1755-01-7 Chemical compound C1[C@H]2[C@@H]3CC=C[C@@H]3[C@@H]1C=C2 HECLRDQVFMWTQS-RGOKHQFPSA-N 0.000 claims description 4
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical class CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 claims description 4
- 150000001336 alkenes Chemical class 0.000 claims description 4
- 230000000447 dimerizing effect Effects 0.000 claims description 4
- 238000011084 recovery Methods 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 238000012360 testing method Methods 0.000 claims description 4
- 238000010792 warming Methods 0.000 claims description 4
- ZKQDCIXGCQPQNV-UHFFFAOYSA-N Calcium hypochlorite Chemical compound [Ca+2].Cl[O-].Cl[O-] ZKQDCIXGCQPQNV-UHFFFAOYSA-N 0.000 claims description 3
- 239000007844 bleaching agent Substances 0.000 claims description 3
- 239000000376 reactant Substances 0.000 claims description 3
- 238000010992 reflux Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 2
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 2
- 159000000007 calcium salts Chemical class 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims description 2
- 238000010025 steaming Methods 0.000 claims description 2
- 238000004064 recycling Methods 0.000 abstract 3
- 230000002378 acidificating effect Effects 0.000 abstract 1
- 238000006386 neutralization reaction Methods 0.000 abstract 1
- 230000003647 oxidation Effects 0.000 abstract 1
- 238000007254 oxidation reaction Methods 0.000 abstract 1
- 238000011268 retreatment Methods 0.000 abstract 1
- 239000002910 solid waste Substances 0.000 abstract 1
- 238000012545 processing Methods 0.000 description 3
- 239000012153 distilled water Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229920006305 unsaturated polyester Polymers 0.000 description 2
- 241000282326 Felis catus Species 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 229920000180 alkyd Polymers 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000206 moulding compound Substances 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 229920001228 polyisocyanate Polymers 0.000 description 1
- 239000005056 polyisocyanate Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
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- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention provides a wastewater treatment method for an unsaturated polyester resin. After oil-water separation to remove an oil layer, wastewater of the unsaturated polyester resin with a chemical oxygen demand (COD) of 60000-80000mg/L and a pH value of 3 can be obtained. The water quality of the wastewater which is subjected to distillation, rectification, neutralization, oxidation, salifying and distillation meets a takeover standard of sewage discharge for enterprises. Two distillation columns which are respectively a void column distillation column and a rectification column filled with a metal ripple packing are arranged on a distillation still. 30% of water containing 1-2% of mixed oil by weight is distilled under the vacuum of 8000-9000Pa and sent back to a polymerizer througha pipeline to re-prepare the unsaturated polyester resin. Then, 50% weight of acidic water is rectified through the rectification column and conveyed to a recycling kettle to neutralize, oxidize and heat into a salt and distilled to prepare the water which meets the takeover standard of sewage discharge for enterprises with the COD smaller than or equal to 500mg/L and the pH value of 6-8. Residues in the distillation still are conveyed to prepare a colored unsaturated polyester resin and residues at the bottom of the recycling kettle are sent back to the recycling kettle for retreatment through a filter liquid, and a filter cake stack is treated as solid waste.
Description
One. technical field
The present invention relates to a kind of method of wastewater treatment of unsaturated polyester resin, relate to or rather the method for wastewater treatment that produces in a kind of unsaturated polyester resin production process.
Two. background technology
Unsaturated polyester resin is in a large number for the preparation of moulding compound, coating and tackiness agent.China has hundreds of thousands of ton scale production ability at present, is one of bulk product in the thermosetting resin.The alkyd wastewater flow rate that produces is also very considerable, accounts for greatly 10 % by weight of unsaturated polyester resin turnout, and in the past, manufacturer directly is neutralized to pH=7 to the waste water of producing with sodium hydroxide, gives processing department again and processes.Do like this waste water per ton and must spend 1600 yuan of RMB, not only so, owing to including ethylene glycol, glycol ether, MALEIC ANHYDRIDE in the waste water, phthalic anhydride and mixing oil, and the mixing oil composition comprises dicyclopentadiene, alkyl norbornylene, isoprene dimer, methyl tetrahydroindene, benzene, the above dimerizing olefins body of toluene and C10.Can not increase production cost if do not recycle, and stink is heavy in the waste water, affects the worker healthy.For overcoming the defective of prior art, the present inventor carries out a large amount of tests and method screening, proposes the technical scheme of the method for wastewater treatment of unsaturated polyester resin of the present invention.
Three. summary of the invention
For the unsaturated polyester resins wastewater that comprises ethylene glycol, glycol ether, MALEIC ANHYDRIDE, phthalic anhydride, mixing oil and sour water, its pH=3, chemical oxygen demand COD is 60000～80000mg/L, stink is serious.Inventors according to instruction will organic compound and moisture in this sewage from, reclaim unsaturated polyester resin raw materials for production, alcohols, acids and mixing oil.PH is dropped to 6～8, and chemical oxygen demand (COD) (COD) drops to≤500mg/L, and the waste water of processing reaches the adapter emission standard.The present inventor screens method of wastewater treatment, has proposed complete technical scheme through a large amount of experiments.
The method of wastewater treatment of a kind of unsaturated polyester resin of the present invention, its step comprises:
(1) chemical oxygen demand COD of waste water of removing the unsaturated polyester resin of oil reservoir through oily water separation is 60000～80000mg/L, pH=3;
(2) waste water of this unsaturated polyester resin enters still kettle from the waste water transfer lime, is provided with distillation column and rectifying column on the still kettle; Distillation column is a void tower, and tower diameter is than 25～30, tower height 2m, at vacuum 8000～9000Pa, 55～60 ℃ of control tower top temperatures steam mixing oil and part water, and the amount of steaming accounts for 30% of total waste water gross weight, distillate enters storage tank through shell and tube cooler, liquid in the storage tank is water white transparency, pH=5～6, chemical oxygen demand COD=15000mg/L, mixing oil accounts for 1～2% of distillate weight, and distillate is along water and mixing oil transfer lime circulation unsaturated polyester resin processed; Rectifying column is the packing tower that is filled with metal corrugated packing, high 6m, diameter 200mm, 15 of theoretical plate numbers, 80 ℃ of the oil temperatures of control still kettle, 60～65 ℃ of tower top temperatures steam at the sour water of lower total wastewater flow rate 50% weight of vacuum tightness 8000～9000Pa, and the control reflux ratio is 40%, enter storage tank through the tubulation water cooler, here, the chemical oxygen demand COD of the sour water that rectifying goes out is 6000～8000mg/L, pH=4～5; After distilling out mixing oil and water and sour water, the raffinate of still kettle bottom is emitted, this part raffinate thing accounts for 20% of total waste water weight; This part raffinate comprises the phthalic anhydride of 16% weight take the raffinate total amount as 100%, the MALEIC ANHYDRIDE of 5% weight, the ethylene glycol of 5% weight, the water of the glycol ether of 10% weight and 64% weight after emitting at the bottom of the still, is carried along transfer lime and to be removed to prepare dark unsaturated polyester resin;
(3) after the sour water that distills out enters and reclaims still, turn on agitator, add solid sodium hydroxide from charging opening, regulate pH=8, the high test bleaching powder of the adding sour water weight 2% that continues, it is 94～98 ℃ that stirring is warming up to feed temperature, be oxidized to reactant salt 0.5～2 hour, and then distilled water outlet, the pH=6 of the water that distills out～8, chemical oxygen demand COD≤500mg/L, the discharge of wastewater that meets Shanghai Jinshan the second manufacturing district sewage disposal company limited is taken over standard; Residue is put into the mesh gauze filter filtration at the bottom of reclaiming the still still, and mesh gauze filter mesh size 200～300 orders, filter cake calcium salt are collected and stacked, and raffinate is sent the recovery still back to and processed.
Consisting of of mixing oil described in the step of the present invention (2): 1 % by weight dicyclopentadiene, 64 % by weight alkyl norbornylenes, 11 % by weight isoprene dimers, 11 % by weight methyl tetrahydroindenes, 1 % by weight benzene, 1 % by weight toluene and the above dimerizing olefins body of 11 % by weight C10.
The unsaturated polyester polyisocyanate polyaddition that can contain the waste water in the unsaturated polyester resin production according to the invention process is applied mechanically with raw materials recovery and is used, and waste water COD before processing is dropped to from 60000～80000mg/L can take over the COD≤500mg/L that discharges.Meet discharge of wastewater and take over standard.The discharge of wastewater that namely meets Shanghai Jinshan the second manufacturing district sewage disposal company is taken over standard.The specific standards value is as follows:
Discharge of wastewater is taken over standard
With reference to " Shanghai City integrated wastewater discharge standard " DB31/199-2009
Four. description of drawings
Fig. 1 is the technique block diagram of the method for wastewater treatment of unsaturated polyester resin of the present invention, and number in the figure represents:
1.-the waste water transfer lime, the 2.-still kettle, the 3.-distillation column, the 4-rectifying column, the 5-shell and tube cooler,
The 6-shell and tube cooler, the 7-storage tank, the 8-vacuum pump, the 9-valve, the 10-valve, the 11-valve,
The 12-transfer lime, 13-water and mixing oil transfer lime, 14-reclaims still, 15-distillation column
The 16-shell and tube cooler, 17-valve, 18-vacuum pump, 19-storage tank, the waste water transfer lime after 20-processes, 21-mesh gauze filter, 22-storage tank, 23-charging opening
The 24-storage tank, the 25-agitator.
Wherein still kettle 2 is stainless steel stills, and reclaiming still 14 is enamel stills.The unclassified stores transfer lime, valve, storage tank is stainless material.
Five. embodiment
The following examples are that content of the present invention is further described, but limitation of the present invention anything but.
Embodiment 1
800kg contains ethylene glycol, glycol ether, MALEIC ANHYDRIDE, the unsaturated polyester waste water of phthalic anhydride and mixing oil, the mixing oil here forms and comprises: 1 % by weight dicyclopentadiene, 64 % by weight alkyl norbornylenes, 11 % by weight isoprene dimers, 11 % by weight methyl tetrahydroindenes, 1 % by weight benzene, 1 % by weight toluene and the above dimerizing olefins body of 11 % by weight C10.The pH=3 of this waste water, chemical oxygen demand (COD) (COD) is that 60000～80000mg/L is after it enters still kettle 2 along waste water transfer lime 1, valve-off 9 and opening for feed, meanwhile, Open valve 11, vacuum pump 8, be evacuated to gradually 8000～9000Pa pressure, be warming up to 70 ℃, the distillation column tower top temperature is 55～60 ℃, enter storage tank 7 through shell and tube cooler 5, liquid water white transparency in the storage tank 7, pH=5, chemical oxygen demand COD=15000mg/L, be 30% of wastewater feed amount when being 240kg when distillating liquid measure, comprise mixing oil 2.4～4.8kg in the distillate.Valve-off 11 is removed vacuum, opens storage tank 7 valves, carries as the unsaturated polyester resin synthesis material by water and mixing oil transfer lime 13.
Behind the valve-off 11, Open valve 9 and 10, meanwhile, valve-off 17 is vacuumized by vacuum pump 8, vacuum degree control is at 8000～9000Pa, allowing still kettle 2 heat oil temperatures is 80 ℃, and cat head temperature is 60～65 ℃, and the control reflux ratio is 40%, the theoretical plate number of distillation tower 4 is 15, be filled with metal corrugated packing in the tower, rectifying steam out is through shell and tube cooler 6, and it is pending that valve 10 enters storage tank 24 etc. along pipeline.To the pH=5 of the rectifying water of storage tank 24, COD=6000～8000mg/L, when the rectifying water yield accounts for total wastewater feed amount 50% weight, i.e. 400Kg rectifying water.After removing vacuum; Open still kettle 2 still bottom valves on the one hand, allow the vinasse thing carry along transfer lime 12 and remove to prepare dark unsaturated polyester resin.On the other hand, after removing vacuum, Open valve 17 rectifying water prolong pipeline and enter recovery still 14, turn on agitator 25, add solid sodium hydroxide from charging opening 23, regulate pH=8, it is the 8KG high test bleaching powder that 2% of still 14 interior liquid weights are reclaimed in the adding that continues, stirring is warming up to feed temperature and is 90～04 ℃ and was oxidized to reactant salt 0.5～2 hour, after stop to stir and carry out air distillation, perhaps underpressure distillation, distillate is through distillation column 15 pipe bundle condensers 16, prolong the pipeline storage tank 19 of entering, storage tank 19 interior liquid are water white transparency, pH=6～8, chemical oxygen demand (COD)≤500mg/L, waste water transfer lime 20 after treatment enters the adapter emission treatment, discharging water yield 390Kg.Open after feed liquid has been steamed and reclaim still 14 still bottom valves, feed liquid is put into mesh gauze filter 21 and is filtered, and the 10Kg filter cake is collected and stacked, and 5Kg filtrate enters storage tank 22, then is transported to reclaim in the still 14 and processes.The concrete quality index of the distilled water in the storage tank 19 is: pH=6.5, chemical oxygen demand (COD) 450mg/L, oily 19mg/L, suspended substance 390mg/L, ammonia nitrogen amount 39mg/L, phenol 9.5mg/L, 59 times of colourities.
Claims (2)
1. the method for wastewater treatment of a unsaturated polyester resin is characterized in that the method step comprises:
(1) chemical oxygen demand COD of removing the waste water of the unsaturated polyester resin behind the oil reservoir through oily water separation is 60000～80000mg/L, pH=3;
(2) waste water of this unsaturated polyester resin enters still kettle (2) from waste water transfer lime (1), is provided with distillation column (3) and rectifying column (4) on the still kettle (2); Distillation column (3) is a void tower, the tower diameter ratio is 25～30, tower height 2m, at vacuum 8000～9000Pa, 55～60 ℃ of control tower top temperatures, mixing oil and part water are steamed, the amount of steaming accounts for 30% of total waste water gross weight, distillate enters storage tank (7) through shell and tube cooler (5), liquid in the storage tank (7) is water white transparency, pH=5～6, chemical oxygen demand COD=15000mg/L, mixing oil accounts for 1～2% of distillate weight, and distillate is along water and mixing oil transfer lime (13) circulation unsaturated polyester resin processed; Rectifying column (4) is the packing tower that is filled with metal corrugated packing, high 6m, diameter 200mm, 15 of theoretical plate numbers, 80 ℃ of the oil temperatures of control still kettle (2), 60～65 ℃ of tower top temperatures steam at the sour water of lower total wastewater flow rate 50% weight of vacuum tightness 8000～9000Pa, and the control reflux ratio is 40%, enter storage tank (24) through tubulation water cooler (6), here, the chemical oxygen demand raffinate COD of the sour water that rectifying goes out is 6000～8000mg/L, pH=4～5; After distilling out mixing oil and water and sour water, the raffinate of still kettle (2) bottom is emitted, this part raffinate thing accounts for 20% of total waste water weight; This part raffinate is take the raffinate total amount as 100%, the phthalic anhydride that comprises 16% weight, the MALEIC ANHYDRIDE of 5% weight, the ethylene glycol of 5% weight, the water of the glycol ether of 10% weight and 64% weight, after emitting at the bottom of the still, carry along transfer lime (12) and to remove to prepare dark unsaturated polyester resin;
(3) after the sour water that distills out enters and reclaims still (14), turn on agitator (25), add solid sodium hydroxide from charging opening (23), regulate pH=8, the high test bleaching powder of the adding sour water weight 2% that continues, it is 94～98 ℃ that stirring is warming up to feed temperature, be oxidized to reactant salt 0.5～2 hour, then distill water outlet, the pH=6 of distillation water outlet～8, chemical oxygen demand COD≤500mg/L, the discharge of wastewater that meets Shanghai Jinshan the second manufacturing district sewage disposal company limited is taken over standard, the specific standards value is as follows: pH equals 6-9, oil≤20mg/L, COD≤500mg/L, suspended substance≤400mg/L, ammonia nitrogen≤40mg/L, phenol≤10mg/L, colourity≤60 times; Residue is put into mesh gauze filter (21) filtration at the bottom of reclaiming still (14) still, and mesh gauze filter mesh size 200～300 orders, filter cake calcium salt are collected and stacked, and raffinate is sent recovery still (14) back to and processed.
2. the method for wastewater treatment of a kind of unsaturated polyester resin according to claim 1, it is characterized in that consisting of of the mixing oil described in the step (2): 1 % by weight dicyclopentadiene, 64 % by weight alkyl norbornylenes, 11 % by weight isoprene dimers, 11 % by weight methyl tetrahydroindenes, 1 % by weight benzene, 1 % by weight toluene and the above dimerizing olefins body of 11 % by weight C10.
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| CN106045174B (en) * | 2014-01-17 | 2019-03-22 | 永悦科技股份有限公司 | The three-stage of acid alcohol condensed wastewater shunts processing and alcohol recyclable device and method |
| CN104629032B (en) * | 2015-01-30 | 2016-08-17 | 宜兴市兴合树脂有限公司 | Unsaturated polyester resin produces waste liquid combustible exhaust gas and produces system |
| CN108299349A (en) * | 2018-02-11 | 2018-07-20 | 常熟联邦化工股份有限公司 | Pyromellitic acid anhydride oxidized waste water Resource comprehensive utilization device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101439888A (en) * | 2008-10-30 | 2009-05-27 | 安徽淮河化工股份有限公司 | Method for treating unsaturated polyester resins wastewater |
| CN102001794A (en) * | 2010-11-30 | 2011-04-06 | 华东理工大学 | Method for treating unsaturated polyester resin production wastewater |
| CN102285697A (en) * | 2011-06-08 | 2011-12-21 | 南京工业大学 | Process for recycling waste water from unsaturated polyester resin industry |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101439888A (en) * | 2008-10-30 | 2009-05-27 | 安徽淮河化工股份有限公司 | Method for treating unsaturated polyester resins wastewater |
| CN102001794A (en) * | 2010-11-30 | 2011-04-06 | 华东理工大学 | Method for treating unsaturated polyester resin production wastewater |
| CN102285697A (en) * | 2011-06-08 | 2011-12-21 | 南京工业大学 | Process for recycling waste water from unsaturated polyester resin industry |
Non-Patent Citations (3)
| Title |
|---|
| JP特开2011-167681A 2011.09.01 |
| 不饱和聚酯树脂生产废水治理技术;潘瑞松等;《环境污染治理技术与设备》;20020930;第3卷(第9期);69-71 * |
| 潘瑞松等.不饱和聚酯树脂生产废水治理技术.《环境污染治理技术与设备》.2002,第3卷(第9期),69-71. |
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