CN1803641A - Integrated process for treating waste water of p-aminophenol production and resource recovery method - Google Patents
Integrated process for treating waste water of p-aminophenol production and resource recovery method Download PDFInfo
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- CN1803641A CN1803641A CN200610037919.3A CN200610037919A CN1803641A CN 1803641 A CN1803641 A CN 1803641A CN 200610037919 A CN200610037919 A CN 200610037919A CN 1803641 A CN1803641 A CN 1803641A
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- Prior art keywords
- aminophenol
- resin
- factory effluent
- waste water
- administered
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- PLIKAWJENQZMHA-UHFFFAOYSA-N 4-aminophenol Chemical compound NC1=CC=C(O)C=C1 PLIKAWJENQZMHA-UHFFFAOYSA-N 0.000 title claims abstract description 84
- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000002351 wastewater Substances 0.000 title claims description 28
- 238000004519 manufacturing process Methods 0.000 title abstract description 7
- 238000011084 recovery Methods 0.000 title description 5
- 239000011347 resin Substances 0.000 claims abstract description 33
- 229920005989 resin Polymers 0.000 claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 230000003647 oxidation Effects 0.000 claims abstract description 16
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 16
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 12
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 9
- 235000011121 sodium hydroxide Nutrition 0.000 claims abstract description 3
- 238000003795 desorption Methods 0.000 claims description 23
- 238000010521 absorption reaction Methods 0.000 claims description 20
- 238000001179 sorption measurement Methods 0.000 claims description 19
- 241001131796 Botaurus stellaris Species 0.000 claims description 10
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- 238000004064 recycling Methods 0.000 claims description 7
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 5
- 229920006395 saturated elastomer Polymers 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 4
- 125000003368 amide group Chemical group 0.000 claims description 3
- 230000004048 modification Effects 0.000 claims description 3
- 238000012986 modification Methods 0.000 claims description 3
- 150000002978 peroxides Chemical class 0.000 claims description 3
- 239000012286 potassium permanganate Substances 0.000 claims description 3
- 239000012047 saturated solution Substances 0.000 claims description 3
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 3
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims description 2
- 239000000706 filtrate Substances 0.000 claims description 2
- 239000012535 impurity Substances 0.000 claims description 2
- 239000007800 oxidant agent Substances 0.000 claims description 2
- 230000001590 oxidative effect Effects 0.000 claims description 2
- 230000008929 regeneration Effects 0.000 claims description 2
- 238000011069 regeneration method Methods 0.000 claims description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 8
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 4
- 239000010865 sewage Substances 0.000 abstract 3
- CDAWCLOXVUBKRW-UHFFFAOYSA-N 2-aminophenol Chemical compound NC1=CC=CC=C1O CDAWCLOXVUBKRW-UHFFFAOYSA-N 0.000 abstract 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 abstract 1
- 239000012267 brine Substances 0.000 abstract 1
- 239000000460 chlorine Substances 0.000 abstract 1
- 229910052801 chlorine Inorganic materials 0.000 abstract 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 abstract 1
- 239000003814 drug Substances 0.000 description 5
- DPDMMXDBJGCCQC-UHFFFAOYSA-N [Na].[Cl] Chemical compound [Na].[Cl] DPDMMXDBJGCCQC-UHFFFAOYSA-N 0.000 description 4
- RZVAJINKPMORJF-UHFFFAOYSA-N Acetaminophen Chemical compound CC(=O)NC1=CC=C(O)C=C1 RZVAJINKPMORJF-UHFFFAOYSA-N 0.000 description 3
- 230000000202 analgesic effect Effects 0.000 description 3
- 239000000975 dye Substances 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 238000005304 joining Methods 0.000 description 3
- 229960005489 paracetamol Drugs 0.000 description 3
- 239000005060 rubber Substances 0.000 description 3
- 239000008399 tap water Substances 0.000 description 3
- 235000020679 tap water Nutrition 0.000 description 3
- FFRBMBIXVSCUFS-UHFFFAOYSA-N 2,4-dinitro-1-naphthol Chemical group C1=CC=C2C(O)=C([N+]([O-])=O)C=C([N+]([O-])=O)C2=C1 FFRBMBIXVSCUFS-UHFFFAOYSA-N 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009903 catalytic hydrogenation reaction Methods 0.000 description 1
- 238000003843 chloralkali process Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012847 fine chemical Substances 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- -1 photography Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000005987 sulfurization reaction Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention discloses a treatment and utilization method to aminophenol production sewage with an integrated technique, which comprises: adjusting sewage pH value, selective absorbing p-aminophenol by reproducible amido-modified composite-functional resin to obtain near transparent water; using oxidation to make TOC and total nitrogen and ammonia nitrogen meet request for diaphragm electrolysis brine; then, electrolyzing and preparing chlorine and caustic soda. This invention realizes zero-discharge for sewage, and has great economical values.
Description
One, technical field
The present invention relates to the improvement and the method for resource of institute's waste discharge in the organic intermediate p-aminophenol production process in the industry such as a kind of important medicine, rubber, dyestuff, specifically, be by oxidation of resin absorption integrated chemical and diaphragm electrolysis, organism p-aminophenol in the waste water and inorganics sodium-chlor are recycled respectively, realized the method for waste water zero emission.
Two, background technology
P-aminophenol is a kind of widely used fine-chemical intermediate, is mainly used in industries such as medicine, rubber, dyestuff, photography, oil.P-aminophenol can make the ntipyretic analgesic medicine Paracetamol of knowing through acetylize, and can make stopper, rubber antioxidant and sulfuration, azo fur dyes intermediate and the photographic developer etc. of plastic monomer.The consumption of present domestic p-aminophenol nearly 90% is to be used for synthetic Paracetamol.Paracetamol is global topmost ntipyretic analgesic medicine, and sales volume occupies 45% of whole ntipyretic analgesic medicine market.Can produce a large amount of waste water and produce p-aminophenol, producing p-aminophenol technology with the p-NP catalytic hydrogenation is example, and 1 ton of p-aminophenol of every production is with the nearly 15 tons of waste water of output.It is golden yellow that this waste water is, the about 3000-4000mg/L of the content of p-aminophenol, and TOC reaches more than the 1000mg/L, and inorganic salt content is higher in the waste water, and 20% sodium-chlor is arranged approximately, and a spot of raw material, intermediate.So far do not see the report of effective realization p-aminophenol factory effluent resource type treating.
Three, summary of the invention
1, goal of the invention: the purpose of this invention is to provide a kind of processing p-aminophenol factory effluent and resource recycling method, this method adopts the operational path of resin absorption integrated chemical oxidation and diaphragm electrolysis, recycle organism p-aminophenol and inorganics sodium-chlor in the waste water respectively, realized " zero release " of waste water.
2, technical scheme: for achieving the above object, a kind of Integrated Process Of Treating Production Wastewater Of P-aminophenol And Resource Recovery Method of the present invention is characterized in that it may further comprise the steps:
(1) the pH value of adjusting p-aminophenol factory effluent is 4-9;
(2) step (1) gained waste water is removed after filtration wherein suspended substance, mechanical impurity;
(3) with above-mentioned filtrate by being filled with the adsorption tower of amido modification complex function resin, the p-aminophenol in the selective adsorption waste water;
(4) with gained water outlet in the step (3) through chemical oxidation treatment, this water outlet can reach the requirement of joining bittern as chloralkali process;
(5) with the saturated composite function resin of absorption diluted acid desorption and regeneration in the step (3);
(6) reclaim p-aminophenol in the high concentration desorption liquid that desorption gets off on the resin from step (5), light concentration desorption liquid is used to prepare the next batch desorbing agent.
(7) gained oxidation water outlet in the step (4) is made into bittern by a certain percentage through diaphragm electrolysis preparing chlorine gas and caustic soda.
Among the present invention, through simple pretreated p-aminophenol factory effluent 10-30 ℃ and flow for the condition of 1-3 resin bed volume per hour under by being filled with the adsorption tower of complex function adsorption resin, optionally adsorb p-aminophenol, the nearly water white transparency of absorption effluent.
Composite function resin described in the present invention is to be series plastics such as home-made NDA66, NDA88 or NDA99; The composite function resin that optimizes is: the NDA99 resin, and for Jiangsu Nanda Gede Environmental Protection Technology Co., Ltd produces.
Chemical oxidizing agent described in the present invention can be dioxide peroxide, hydrogen peroxide, clorox or potassium permanganate saturated solution, and its consumption is the 1-5% of wastewater volume, and oxidizing temperature is 30-70 ℃.
Desorbing agent described in the present invention can be that concentration is the hydrochloric acid soln of 1-10%, and desorption temperature is 30～80 ℃, and the flow of desorbing agent is resin bed volume per hour O.2～5.
Oxidation water outlet of the present invention accounts for the 10-50% of electrolysis bittern volume.
Adsorption tower all can adopt single tower absorption and desorption operation scheme in the method for the invention, also can adopt the double-column in series suction type, I, II, three adsorption towers of III promptly are set, earlier with I, II tower series connection following current absorption, the I tower is as first post, the II tower is as stern post, after the absorption of I tower is saturated, switch to II, III tower series connection following current absorption, the II tower is as first post, and the III tower is as stern post, the I tower carries out the adverse current desorption simultaneously, so cyclical operation can guarantee the operation continuously all the time of whole device, increases work efficiency.
3, beneficial effect: by the method for the invention, reclaimed p-aminophenol and sodium-chlor after the p-aminophenol production wastewater treatment respectively, realized " zero release " of waste water.Specifically:
(1) p-aminophenol factory effluent effluent color dilution after adsorbing is become closely colourless by original golden yellow;
(2) p-aminophenol content is below 10mg/L in the absorption effluent, and the rate of recovery is greater than 99%;
(3) waste water TOC behind resin absorption and chemical oxidation is reduced to below the 20mg/L, and total nitrogen and ammonia nitrogen are reduced to 6 and below the 1mg/L respectively, have reached the requirement of joining bittern as electrolysis;
(4) realize waste water zero emission;
(5) polymeric adsorbent absorption, desorption performance are good, reusable.
Four, embodiment
The present invention is further described by the following examples.
Embodiment 1: with humid volume is that 10mL NDA99 resin packs in the glass adsorption column of strap clamp cover that (Φ 12 * 160mm) into.The p-aminophenol factory effluent is regulated about pH to 7 (4-9 all can), after the filtration, under the room temperature (10-30 ℃), with the flow () of 20mL/h (10-30mL/h be in 1-3 the resin bed volume all can) by the NDA99 resin bed, treatment capacity is that 100mL/ criticizes (or 8-30 resin bed volume), and it is collected in the container of clean dried.To add the clorox saturated aqueous solution of (being generally the 1-5% of waste water) about 3mL toward absorption effluent then, be to carry out oxide treatment 1h under (or 30-70 ℃) about 50 ℃ in temperature.Raw wastewater TOC is 1200mg/L, COD
CrBe 9800mg/L, the content of p-aminophenol is 3500mg/L, and the TOC of yielding water after absorption is reduced to 250mg/L, COD
CrReduce to 950mg/L, the content of p-aminophenol is less than 10mg/L, the nearly water white transparency of absorption effluent, and absorption effluent TOC of yielding water after oxidation is reduced to 20mg/L, and total nitrogen and ammonia nitrogen are brought down below 6 and 1mg/L by 45 before oxidation and 25mg/L respectively.Wherein the oxidation water outlet accounts for the 10-50% of electrolysis bittern volume.
After composite function resin absorption is saturated, use the hydrochloric acid soln of 15ml 2% (concentration in 1-2% all can) and 15ml tap water in 65 ℃ (30-80 ℃ all can) successively, flow with 10ml/h (or 2-50ml/h all can) carries out desorption by the NDA99 resin bed, the high concentration desorption liquid that desorption gets off reclaims p-aminophenol through transferring alkali, and lower concentration wash water cover is used for following batch desorption manipulation.
Embodiment 2: with the glass adsorption column in PVC adsorption column (Φ 200*1400) alternate embodiment 1, the loaded resin amount is 25L (about 18Kg), operate according to 2500 times of wastewater flow and treatment capacities in embodiment 1, obtained the effect that reclaims with embodiment 1 corresponding to adsorption treatment and resource.
Embodiment 3: select the identical PVC adsorption tower (Φ 200*1400mm) of three specifications (number respectively I, II, III number) for use, every tower filling NDA99 resin 25L (about 18Kg).(10-30 ℃) will squeeze into adsorption tower through the p-aminophenol factory effluent (the about 3500mg/1 of its p-aminophenol content) after adjust pH, the filtration under the room temperature, adopt double tower (I, II tower) the series connection following current absorption method of single tower (III tower) following current desorption simultaneously.Absorption flow is controlled at 50L/h, and every batch processing amount is controlled at 300L.Waste water after treatment, the nearly water white transparency of absorption effluent, p-aminophenol content is less than 10mg/L.Water outlet adds 2500 times of oxygenants in embodiment 1, carries out oxidation at 50 ℃, and TOC of yielding water, total nitrogen and ammonia nitrogen all reach the index of joining bittern as electrolysis process.Wherein the oxidation water outlet accounts for 35% of electrolysis bittern volume.
The I adsorption tower that adsorbed in the 300L waste water dress NDA-10 complex function adsorption resin at 65-70 ℃ down with 2% aqueous hydrochloric acid and tap water desorption successively.Earlier raffinate in the I tower is drained,, carry out following current drip washing with the tap water of 40L with the flow of 25L/h then, the high concentration desorption liquid of preceding 40L is transferred alkali recovery p-aminophenol with 2% hydrochloric acid soln of 40L flow following current desorption with 20L/h; The wash water of back 40L is put into storage tank, and 30L is used to prepare the next batch desorbing agent, and all the other are used as the head wash water of desorption next time.I adsorption tower after desorption finishes will be as the stern post of the 3rd batch of waste water adsorption operations (when handling second batch of waste water, II, III two towers are connected, post headed by the II tower, the III tower is a stern post), cyclical operation.Can guarantee the operation continuously all the time of whole device, increase work efficiency.
Embodiment 4: the complex function adsorption resin among the embodiment 1 used instead according to this be NDA66 or NDA88 resin, wastewater treatment capacity and handle after effluent quality all slightly be inferior to NDA99.
Embodiment 5: change the oxygenant among the embodiment 1 into dioxide peroxide, hydrogen peroxide or potassium permanganate saturated solution according to this, its result is all inferior to embodiment 1.
Claims (6)
1, a kind of integrated technique is administered p-aminophenol factory effluent and resource recycling method, it is characterized in that it may further comprise the steps:
(1) the pH value of adjusting p-aminophenol factory effluent is 4-9;
(2) after filtration, removal suspended substance, mechanical impurity wherein with step (1) gained waste water;
(3) with above-mentioned filtrate by being filled with the adsorption tower of amido modification complex function resin, the p-aminophenol in the selective adsorption waste water;
(4) with gained water outlet in the step (3) through chemical oxidation treatment;
(5) with the saturated composite function resin of absorption diluted acid desorption and regeneration in the step (3);
(6) reclaim p-aminophenol in the high concentration desorption liquid that desorption gets off on the resin from step (5), light concentration desorption liquid is used to prepare the next batch desorbing agent;
(7) gained oxidation water outlet in the step (4) is made into bittern through diaphragm electrolysis preparing chlorine gas and caustic soda.
2, a kind of integrated technique according to claim 1 is administered p-aminophenol factory effluent and resource recycling method, and it is characterized in that: in step (3), described amido modification complex function resin is NDA66, NDA88 or NDA99 resin.
3, a kind of integrated technique according to claim 1 is administered p-aminophenol factory effluent and resource recycling method, it is characterized in that: in step (3), under 10-30 ℃, flow is for per hour foretelling 3 resin bed volumes during by resin for waste water, and treatment capacity is an every batch of 8-30 resin bed volume.
4, a kind of integrated technique according to claim 1 is administered p-aminophenol factory effluent and resource recycling method, it is characterized in that: in step (4), described chemical oxidizing agent is dioxide peroxide, hydrogen peroxide, clorox or potassium permanganate saturated solution, its consumption is the 1-5% of wastewater volume, and oxidizing temperature is 30-70 ℃.
5, a kind of integrated technique according to claim 1 is administered p-aminophenol factory effluent and resource recycling method, it is characterized in that: the hydrochloric acid soln that selected desorbing agent concentration is 1-10% in step (5), desorption temperature is 30～80 ℃, and the flow of desorbing agent is 0.2-5 resin bed volume per hour.
6, a kind of integrated technique according to claim 1 is administered p-aminophenol factory effluent and resource recycling method, and it is characterized in that: the oxidation water outlet is made into diaphragm electrolysis bittern in step (7), and wherein the oxidation water outlet accounts for the 10-50% of electrolysis bittern volume.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100379193A CN100352770C (en) | 2006-01-23 | 2006-01-23 | Integrated process for treating waste water of p-aminophenol production and resource recovery method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100379193A CN100352770C (en) | 2006-01-23 | 2006-01-23 | Integrated process for treating waste water of p-aminophenol production and resource recovery method |
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| Publication Number | Publication Date |
|---|---|
| CN1803641A true CN1803641A (en) | 2006-07-19 |
| CN100352770C CN100352770C (en) | 2007-12-05 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102616959A (en) * | 2012-04-01 | 2012-08-01 | 江苏焕鑫高新材料科技有限公司 | Method for recycling iodine and phenolic compounds from waste alkaline water containing phenol ions and iodine ions and realizing pollution-free emission |
| CN102815827A (en) * | 2012-06-18 | 2012-12-12 | 江苏扬农锦湖化工有限公司 | Epoxy resin high-salinity wastewater treatment method |
| CN104086029A (en) * | 2014-07-21 | 2014-10-08 | 上海伟业环保工程有限公司 | Process for recovering wastewater in production of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and derivatives thereof |
| CN107043145A (en) * | 2016-11-30 | 2017-08-15 | 南通波涛化工有限公司 | A kind of resin adsorption method pre-processes technique containing amino benzene analog waste water |
| CN107117749A (en) * | 2017-05-17 | 2017-09-01 | 浙江奇彩环境科技股份有限公司 | A kind of para-aminophenol produces the recycling processing method of waste water |
| CN115521014A (en) * | 2022-10-28 | 2022-12-27 | 辽宁世星药化有限公司 | Method for treating wastewater generated in production of p-aminophenol by catalytic hydrogenation of nitrobenzene |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1247467C (en) * | 2003-09-24 | 2006-03-29 | 浙江工业大学 | Technique of electrolytic oxidation for treating waste water of containing phenol |
| CN1234619C (en) * | 2004-04-06 | 2006-01-04 | 南京大学 | Method for treating wastewater generated from fabricating nitrophenol as well as for reclaiming and using resources |
| CN1288100C (en) * | 2004-11-17 | 2006-12-06 | 杨云军 | Combined process of treating high concentration and high colority effluent from acetaminophen production |
| CN1712365A (en) * | 2005-05-18 | 2005-12-28 | 南京大学 | Treatment of wastewater from production of para-aminophenol and making it be resource |
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2006
- 2006-01-23 CN CNB2006100379193A patent/CN100352770C/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102616959A (en) * | 2012-04-01 | 2012-08-01 | 江苏焕鑫高新材料科技有限公司 | Method for recycling iodine and phenolic compounds from waste alkaline water containing phenol ions and iodine ions and realizing pollution-free emission |
| CN102616959B (en) * | 2012-04-01 | 2013-11-06 | 江苏焕鑫高新材料科技有限公司 | Method for recycling iodine and phenolic compounds from waste alkaline water containing phenol ions and iodine ions and realizing pollution-free emission |
| CN102815827A (en) * | 2012-06-18 | 2012-12-12 | 江苏扬农锦湖化工有限公司 | Epoxy resin high-salinity wastewater treatment method |
| CN104086029A (en) * | 2014-07-21 | 2014-10-08 | 上海伟业环保工程有限公司 | Process for recovering wastewater in production of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and derivatives thereof |
| CN107043145A (en) * | 2016-11-30 | 2017-08-15 | 南通波涛化工有限公司 | A kind of resin adsorption method pre-processes technique containing amino benzene analog waste water |
| CN107117749A (en) * | 2017-05-17 | 2017-09-01 | 浙江奇彩环境科技股份有限公司 | A kind of para-aminophenol produces the recycling processing method of waste water |
| CN115521014A (en) * | 2022-10-28 | 2022-12-27 | 辽宁世星药化有限公司 | Method for treating wastewater generated in production of p-aminophenol by catalytic hydrogenation of nitrobenzene |
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| CN100352770C (en) | 2007-12-05 |
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Assignee: Jiangsu Ruixiang Chemical Co., Ltd. Assignor: Jiangsu Yangnong Chemical Group Co., Ltd.|Nanjing University|Jiangsu NJU Gede Environmental Protection Technology Co., Ltd. Contract fulfillment period: 2009.3.10 to 2015.3.9 contract change Contract record no.: 2009320000424 Denomination of invention: Integrated process for treating waste water of p-aminophenol production and resource recovery method Granted publication date: 20071205 License type: Exclusive license Record date: 2009.3.18 |
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Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.3.10 TO 2015.3.9; CHANGE OF CONTRACT Name of requester: JIANGSU RUIXIANG CHEMICAL INDUSTRY CO., LTD. Effective date: 20090318 |