CN102583863A - Wastewater treatment method for unsaturated polyester resin - Google Patents
Wastewater treatment method for unsaturated polyester resin Download PDFInfo
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- CN102583863A CN102583863A CN2012100439452A CN201210043945A CN102583863A CN 102583863 A CN102583863 A CN 102583863A CN 2012100439452 A CN2012100439452 A CN 2012100439452A CN 201210043945 A CN201210043945 A CN 201210043945A CN 102583863 A CN102583863 A CN 102583863A
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- unsaturated polyester
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- 229920006337 unsaturated polyester resin Polymers 0.000 title claims abstract description 29
- 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 48
- 239000002351 wastewater Substances 0.000 claims abstract description 38
- 239000007788 liquid Substances 0.000 claims abstract description 16
- 239000000126 substance Substances 0.000 claims abstract description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000001301 oxygen Substances 0.000 claims abstract description 11
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 11
- 238000004821 distillation Methods 0.000 claims abstract description 9
- 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
- 238000012856 packing Methods 0.000 claims abstract description 3
- 238000000926 separation method Methods 0.000 claims abstract description 3
- 239000011800 void material Substances 0.000 claims abstract description 3
- 238000002156 mixing Methods 0.000 claims description 20
- 235000008733 Citrus aurantifolia Nutrition 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
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 10
- LGRFSURHDFAFJT-UHFFFAOYSA-N Phthalic anhydride Natural products C1=CC=C2C(=O)OC(=O)C2=C1 LGRFSURHDFAFJT-UHFFFAOYSA-N 0.000 claims description 7
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 7
- JHIWVOJDXOSYLW-UHFFFAOYSA-N butyl 2,2-difluorocyclopropane-1-carboxylate Chemical compound CCCCOC(=O)C1CC1(F)F JHIWVOJDXOSYLW-UHFFFAOYSA-N 0.000 claims description 6
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 claims description 6
- 238000011084 recovery Methods 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-UHFFFAOYSA-N Dicyclopentadiene Chemical compound C1C2C3CC=CC3C1C=C2 HECLRDQVFMWTQS-UHFFFAOYSA-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
- 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
- 159000000007 calcium salts Chemical class 0.000 claims description 3
- 239000000945 filler 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
- 230000004087 circulation Effects 0.000 claims description 2
- 239000012153 distilled water Substances 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims description 2
- 238000010025 steaming Methods 0.000 claims description 2
- 239000010865 sewage Substances 0.000 abstract description 3
- 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
- 239000003921 oil Substances 0.000 description 18
- 235000011121 sodium hydroxide Nutrition 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229920006305 unsaturated polyester Polymers 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 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
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 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
- LYCAIKOWRPUZTN-UHFFFAOYSA-N ethylene glycol Natural products OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- -1 glycol ethers Chemical class 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000206 moulding compound Substances 0.000 description 1
- 229920001228 polyisocyanate Polymers 0.000 description 1
- 239000005056 polyisocyanate Substances 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
- 238000007873 sieving 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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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 through a 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
Technical field
The present invention relates to a kind of method of wastewater treatment of unsaturated polyester resin, relate to the method for wastewater treatment that produces in a kind of unsaturated polyester resin production process or rather.
Background technology
Unsaturated polyester resin is used to prepare moulding compound in a large number, coating and tackiness agent.China has hundreds of thousands of ton scale prodn 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 10 weight % of unsaturated polyester resin turnout greatly, and in the past, manufacturer directly is neutralized to pH=7 to the waste water of being produced with sodium hydroxide, gives processing department again and handles.Do waste water per ton like this and must spend 1600 yuan of RMB, not only so, owing to include terepthaloyl moietie in the waste water; Glycol ether, MALEIC ANHYDRIDE, phthalic anhydride and mixing oil; And the mixing oil composition comprises NSC 7352, 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, it is healthy to influence the worker.For overcoming the defective of prior art, the present inventor carries out lot of test and method screening, proposes the technical scheme of the method for wastewater treatment of unsaturated polyester resin of the present invention.
Summary of the invention
For the unsaturated polyester resins wastewater that comprises terepthaloyl moietie, 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 will reclaim unsaturated polyester resin raw materials for production, alcohols, acids and mixing oil to organic cpds and water sepn in this sewage according to instruction.Drop to 6 ~ 8 to pH, COD (COD) drops to≤500 mg/L, and the waste water of handling 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) removes through oily water separation that to obtain chemical oxygen demand COD behind the oil reservoir be 60000 ~ 80000mg/L, the waste water of the unsaturated polyester resin of pH=3;
(2) waste water of this unsaturated polyester resin gets into still kettle from the waste water transfer lime, and still kettle is provided with still column and rectifying volumn; Still column is a void tower, and tower diameter is than 25 ~ 30, and tower height 2m is at vacuum 8000 ~ 9000Pa; 55 ~ 60 ℃ of control tower top temperatures steam mixing oil and portion water, and the amount of steaming accounts for 30% of total waste water gross weight; Steam liquid and get into storage tank through shell and tube cooler, the liquid in the storage tank is water white transparency, pH=5 ~ 6; Chemical oxygen demand COD=15000 mg/L, mixing oil account for and steam 1 ~ 2% of liquid weight, steam liquid and remove to prepare unsaturated polyester resin along water and the circulation of mixing oil transfer lime; Rectifying volumn is the packing tower that is filled with the wavy metal filler, high 6m, diameter 200mm; 15 of theoretical plate numbers, 80 ℃ of the oil temperature of control still kettle, 60 ~ 65 ℃ of tower top temperatures; Sour water in following total wastewater flow rate 50% weight of vacuum tightness 8000 ~ 9000Pa steams, and the control reflux ratio is 40%, gets into storage tank through the tubulation water cooler; Here, the chemical oxygen demand COD of smart distilled sour water is 6000 ~ 8000 mg/L, pH=4 ~ 5; After distilling out mixing oil and water and sour water, emit the raffinate of still kettle bottom, this part raffinate thing accounts for 20% of total waste water weight; This part raffinate is 100% in the raffinate total amount, comprises the phthalic anhydride of 16% weight, the MALEIC ANHYDRIDE of 5% weight; The terepthaloyl moietie 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 got into and reclaims still, turn on agitator added solid sodium hydroxide from charging opening; Regulate pH=8, the high test bleaching powder of the adding sour water weight 2% that continues, stirring and being warming up to feed temperature is 94 ~ 98 ℃; Be oxidized to reactant salt 0.5 ~ 1 hour, and distilled water outlet then, the pH=6 of the water that distills out ~ 8; Chemical oxygen demand COD≤500 mg/L, the discharge of wastewater that meets Kingsoft, Shanghai second manufacturing district WWT ltd 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 handled.
Consisting of of mixing oil described in Bu Zhou ﹙ 2 ﹚ of the present invention: 1 weight % NSC 7352; 64 weight % alkyl norbornylenes, 11 weight % isoprene dimers; 11 weight % methyl tetrahydroindenes, 1 weight % benzene, 1 weight % toluene and the above dimerizing olefins body of 11 weight %C10.
The unsaturated polyester polyisocyanate polyaddition of implementing according to the present invention to contain the waste water in the unsaturated polyester resin production with the raw material recovery set with and use, waste water COD before handling is dropped to from 60000 ~ 80000 mg/L can take over COD≤500 mg/L that discharge.Accord with wastewater discharge nozzle standard.The discharge of wastewater that promptly meets Kingsoft, Shanghai second manufacturing district WWT company is taken over standard.Concrete standard value is following:
Discharge of wastewater is taken over standard
With reference to " Shanghai City integrated wastewater discharge standard " DB31/199-2009.
With the unsaturated polyester resins wastewater total amount is that 100 weight parts are the basis; Then can be recycled to 4 ~ 5 weight part mixing oils, 25 weight part terepthaloyl moietie, 3.8 weight part glycol ethers; 5 weight part MALEIC ANHYDRIDEs and 3.2 weight part phthalic anhydrides; The adapter discharge water of 43 ~ 60 weight part COD≤500 mg/L, sieving liquid 3 ~ 4 weight parts, wherein 1 ~ 2 weight parts water is taken away by calcium salt.
Description of drawings
Fig. 1 is the technology block diagram of the method for wastewater treatment of unsaturated polyester resin of the present invention, and label is represented among the figure:
1.-the waste water transfer lime, 2.-still kettle, 3.-still column, 4-rectifying volumn, 5-shell and tube cooler; 6-shell and tube cooler, 7-storage tank, 8-vacuum pump, 9-valve, 10-valve; 11-valve, 12-transfer lime, 13-water and mixing oil transfer lime, 14-recovery still, 15-still column; 16-shell and tube cooler, 17-valve, 18-vacuum pump, 19-storage tank, the waste water transfer lime after 20-processing; 21-mesh gauze filter, 22-storage tank, 23-charging opening, 24-storage tank, 25-whisking appliance.
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.
Embodiment
Below embodiment content of the present invention is further described but limitation of the present invention anything but.
Embodiment 1.
800kg contains the unsaturated polyester waste water of terepthaloyl moietie, glycol ether, MALEIC ANHYDRIDE, phthalic anhydride and mixing oil; The mixing oil is here formed and is comprised: 1 weight % NSC 7352; 64 weight % alkyl norbornylenes, 11 weight % isoprene dimers; 11 weight % methyl tetrahydroindenes, 1 weight % benzene, 1 weight % toluene and the above dimerizing olefins body of 11 weight %C10; The pH=3 of this waste water, COD (COD) is 60000 ~ 80000mg/L, after it gets into 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 8000 ~ 9000Pa pressure gradually, be warming up to 70 ℃, still column 3 tower top temperatures are 55 ~ 60 ℃; Get into storage tank 7 through shell and tube cooler 5, the liquid water white transparency in the storage tank 7, pH=5; Chemical oxygen demand COD=15000 mg/L is 30% of a wastewater feed amount when being 240kg when distillating liquid measure, comprises mixing oil 2.4 ~ 4.8kg in the distillate; Valve-off 11 is removed vacuum, opens storage tank 7 valves, and distillate is carried as the unsaturated polyester resin synthesis material through 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, and vacuum degree control is at 8000 ~ 9000Pa, lets the still kettle 2 heated oil temperature be 80 ℃; Cat head temperature is 60 ~ 65 ℃, and the control reflux ratio is 40%, and the theoretical plate number of rectifying volumn 4 is 15; Be filled with the wavy metal filler in the rectifying volumn 4, it is pending that the steam that rectifying is come out gets into storage tank 24 etc. through shell and tube cooler 6, valve 10 along pipeline.To the pH=5 of the rectifying water of storage tank 24, COD=6000 ~ 8000mg/L is when the rectifying water yield accounts for total wastewater feed amount 50% weight; When being 400Kg rectifying water; Remove vacuum, open still kettle 2 still bottom valves on the one hand, let the vinasse thing carry and remove to prepare dark unsaturated polyester resin along transfer lime 12.Raffinate thing 150Kg comprises: phthalic anhydride 182Kg MALEIC ANHYDRIDE 7Kg, terepthaloyl moietie 9.6Kg, glycol ether 12.8Kg and water 103Kg.
On the other hand, after the releasing vacuum, Open valve 17 rectifying water prolong pipeline and get into recovery still 14, turn on agitator 25; Add solid sodium hydroxides from charging opening 23, regulate pH=8, it is the 8KG high test bleaching powder that 2% of liquid weights in the still 14 are reclaimed in addings that continues, and stirring is warming up to feed temperature and is 90 ~ 94 ℃ and is oxidized to reactant salt after 0.5 ~ 1 hour; Stop to stir and carry out air distillation, perhaps underpressure distillation, distillate is through still column 15, shell and tube cooler 16; Prolong the pipeline conveying and remove storage tank 19, liquid are water white transparency, pH=6 ~ 8 in the storage tank 19; COD≤500 mg/L, waste water after treatment get into through transfer lime 20 and take over 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 filtrating gets into storage tank 22, is transported to then to reclaim in the still 14 and handles.The concrete quality index of the zero(ppm) water in the storage tank 19 is: pH=6.5, COD 450 mg/L, oily 19 mg/L, suspended substance 390 mg/L, ammonia nitrogen amount 39 mg/L, phenol 9.5 mg/L, 59 times of colourities.
Claims (2)
1. the method for wastewater treatment of a unsaturated polyester resin is characterized in that this method steps comprises:
(1) removes through oily water separation that to obtain chemical oxygen demand COD behind the oil reservoir be 60000 ~ 80000mg/L, the waste water of the unsaturated polyester resin of pH=3;
(2) waste water of this unsaturated polyester resin gets into still kettle 2 from waste water transfer lime 1, and still kettle 2 is provided with still column 3 and rectifying volumn 4; Still column 3 is void towers, and the tower diameter ratio is 25 ~ 30, and tower height 2m is at vacuum 8000 ~ 9000Pa; 55 ~ 60 ℃ of control tower top temperatures steam mixing oil and portion water, and the amount of steaming accounts for 30% of total waste water gross weight; Steam liquid and get into storage tank 7 through shell and tube cooler 5, the liquid in the storage tank 7 is water white transparency, pH=5 ~ 6; Chemical oxygen demand COD=15000 mg/L, mixing oil account for and steam 1 ~ 2% of liquid weight, steam liquid and remove to prepare unsaturated polyester resin along water and 13 circulations of mixing oil transfer lime; Rectifying volumn 4 is the packing towers that are filled with the wavy metal filler, high 6m, diameter 200mm, 15 of theoretical plate numbers; Control still kettle 2,80 ℃ of oil temperature, 60 ~ 65 ℃ of tower top temperatures; Sour water in following total wastewater flow rate 50% weight of vacuum tightness 8000 ~ 9000Pa steams, and the control reflux ratio is 40%, gets into storage tank 24 through tubulation water cooler 6; Here, the chemical oxygen demand raffinate COD of smart distilled sour water is 6000 ~ 8000 mg/L, pH=4 ~ 5; After distilling out mixing oil and water and sour water, emit the raffinate of still kettle 2 bottoms, this part raffinate thing accounts for 20% of total waste water weight; This part raffinate is 100% in the raffinate total amount, comprises the phthalic anhydride of 16% weight, the MALEIC ANHYDRIDE of 5% weight; The terepthaloyl moietie 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 12 and to be removed to prepare dark unsaturated polyester resin;
(3) after the sour water that distills out got into and reclaims still 14, turn on agitator 25 added solid sodium hydroxide from charging opening 23; Regulate pH=8, the high test bleaching powder of the adding sour water weight 2% that continues, stirring and being warming up to feed temperature is 94 ~ 98 ℃; Be oxidized to reactant salt 0.5 ~ 1 hour, and distilled water outlet then, pH=6 ~ 8 of distillation water outlet; Chemical oxygen demand COD≤500 mg/L, the discharge of wastewater that meets Kingsoft, Shanghai second manufacturing district WWT ltd is taken over standard; Residue is put into mesh gauze filter 21 filtrations at the bottom of reclaiming still 14 stills, 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 handled.
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 Bu Zhou ﹙ 2 ﹚: 1 weight % NSC 7352; 64 weight % alkyl norbornylenes, 11 weight % isoprene dimers; 11 weight % methyl tetrahydroindenes, 1 weight % benzene, 1 weight % toluene and the above dimerizing olefins body of 11 weight %C10.
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| CN 201210043945 CN102583863B (en) | 2012-02-26 | 2012-02-26 | Wastewater treatment method for unsaturated polyester resin |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104310680A (en) * | 2014-01-17 | 2015-01-28 | 福建永悦科技有限公司 | Pretreatment device and method for acid-alcohol polycondensation wastewater |
| CN104629032A (en) * | 2015-01-30 | 2015-05-20 | 宜兴市兴合树脂有限公司 | System for producing flammable waste gas by utilizing waste liquid produced in production of unsaturated polyester resin |
| 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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| JP2011167681A (en) * | 2010-01-22 | 2011-09-01 | Mitsubishi Chemicals Corp | Method for treating wastewater, method for producing polyester, and apparatus for producing polyester |
| 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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2012
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104310680A (en) * | 2014-01-17 | 2015-01-28 | 福建永悦科技有限公司 | Pretreatment device and method for acid-alcohol polycondensation wastewater |
| CN104310680B (en) * | 2014-01-17 | 2016-06-22 | 永悦科技股份有限公司 | A kind of acid alcohol polycondensation Wastewater Pretreatment Apparatus and method for |
| CN104629032A (en) * | 2015-01-30 | 2015-05-20 | 宜兴市兴合树脂有限公司 | System for producing flammable waste gas by utilizing waste liquid produced in production of unsaturated polyester resin |
| 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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| CN102583863B (en) | 2013-10-23 |
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