CN1233570C - Reclaiming technique by using resin to adsorb nitro chlorobenzene in wastewater from producing nitro chlorobenzene - Google Patents
Reclaiming technique by using resin to adsorb nitro chlorobenzene in wastewater from producing nitro chlorobenzene Download PDFInfo
- Publication number
- CN1233570C CN1233570C CN200410014428.8A CN200410014428A CN1233570C CN 1233570 C CN1233570 C CN 1233570C CN 200410014428 A CN200410014428 A CN 200410014428A CN 1233570 C CN1233570 C CN 1233570C
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- CN
- China
- Prior art keywords
- nitrochlorobenzene
- resin
- chlorobenzene
- nitro
- waste water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- BFCFYVKQTRLZHA-UHFFFAOYSA-N 1-chloro-2-nitrobenzene Chemical compound [O-][N+](=O)C1=CC=CC=C1Cl BFCFYVKQTRLZHA-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 239000011347 resin Substances 0.000 title claims abstract description 32
- 229920005989 resin Polymers 0.000 title claims abstract description 32
- 239000002351 wastewater Substances 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title abstract description 10
- 238000003795 desorption Methods 0.000 claims abstract description 14
- 239000007788 liquid Substances 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000001179 sorption measurement Methods 0.000 claims abstract description 10
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 9
- 238000011084 recovery Methods 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 7
- 230000008929 regeneration Effects 0.000 claims abstract description 7
- 238000011069 regeneration method Methods 0.000 claims abstract description 7
- 238000000926 separation method Methods 0.000 claims abstract description 7
- CHRJZRDFSQHIFI-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;styrene Chemical compound C=CC1=CC=CC=C1.C=CC1=CC=CC=C1C=C CHRJZRDFSQHIFI-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 239000012535 impurity Substances 0.000 claims abstract description 4
- 238000010521 absorption reaction Methods 0.000 claims description 13
- 239000003463 adsorbent Substances 0.000 claims description 10
- 238000005516 engineering process Methods 0.000 claims description 7
- 238000002203 pretreatment Methods 0.000 claims description 2
- CZGCEKJOLUNIFY-UHFFFAOYSA-N 4-Chloronitrobenzene Chemical compound [O-][N+](=O)C1=CC=C(Cl)C=C1 CZGCEKJOLUNIFY-UHFFFAOYSA-N 0.000 abstract description 18
- 239000000126 substance Substances 0.000 abstract description 7
- 239000002699 waste material Substances 0.000 abstract description 3
- 230000000274 adsorptive effect Effects 0.000 abstract 2
- IQUPABOKLQSFBK-UHFFFAOYSA-N 2-nitrophenol Chemical compound OC1=CC=CC=C1[N+]([O-])=O IQUPABOKLQSFBK-UHFFFAOYSA-N 0.000 abstract 1
- MVPPADPHJFYWMZ-UHFFFAOYSA-N chlorobenzene Chemical compound ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 description 14
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 12
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 9
- 238000000605 extraction Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 4
- 239000000047 product Substances 0.000 description 3
- 238000001914 filtration Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 241000406668 Loxodonta cyclotis Species 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 239000003905 agrochemical Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 239000012043 crude product Substances 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005194 fractionation Methods 0.000 description 1
- 230000000802 nitrating effect Effects 0.000 description 1
- 238000006396 nitration reaction Methods 0.000 description 1
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000012492 regenerant Substances 0.000 description 1
- 239000002594 sorbent Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Water Treatment By Sorption (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The present invention relates to a recovery technique by using resin to absorb nitrochlorobenzene waste water from producing nitrochlorobenzene, which is characterized by comprising the following steps: removing mechanical impurity from the waste water from producing nitrochlorobenzene by treatment, passing the waste water through an adsorbing column filled with styrene-divinylbenzene adsorptive resin under the flow quantity below 10 BV/h, enabling the nitrochlorobenzene selectively absorbed on the resin and nitrophenol substances not absorbed, absorbing the nitrochlorobenzene in the water with the content below 2 mg/L, carrying out desorption and regeneration on the adsorptive resin absorbed with the nitrochlorobenzene by using water vapor as desorbing agents, cooling obtained mixtures of steam and liquid, and then separating and recovering the nitrochlorobenzene. More than 99 % of o-nitrochlorobenzene and p-Nitrochlorobenzene can be recovered by using the present invention to treat the waste water from producing nitrochlorobenzene, and recovered matters can be returned to a rectification work section for carrying out rectification and separation to obtain products of o-nitrochlorobenzene and p-Nitrochlorobenzene; simultaneously, the content of the nitrochlorobenzene in waste liquid after adsorption treatment is smaller than 2 mg/L.
Description
Technical field
The present invention relates to the recovery method of useful matter in the chloronitrobenzene producing wastewater, particularly is to adopt polymeric adsorbent optionally to adsorb, reclaim the treatment process of ortho para nitro-chlorobenzene in the chloronitrobenzene producing wastewater.
Background technology
Nitro-chlorobenzene (comprising p-Nitrophenyl chloride, o-Nitrochlorobenzene) is an important chemical material, is widely used in industries such as agricultural chemicals, dyestuff.The production of nitro-chlorobenzene is to be former section with chlorobenzene, and it is nitrated to adopt nitration mixture to be that nitrating agent carries out, and the nitrated crude product that obtains need carry out fractionation with rectifying tower through after washing and the caustic wash process, obtains p-Nitrophenyl chloride and o-Nitrochlorobenzene.
Adopt above-mentioned production technique, produce product per ton and will produce about about 1.2 tons alkaline waste water, content wherein adjacent, p-Nitrophenyl chloride is 800～1200mg/L, contains the nitropheneol material simultaneously.Recovery to the neighbour in this waste liquid, p-Nitrophenyl chloride mainly contains chlorobenzene extraction and two kinds of technologies of water vapor component distillation.The chlorobenzene extraction process promptly comes organism in the extraction wastewater with chlorobenzene as extraction agent, and the chlorobenzene extraction liquid returns nitrated workshop section as raw material.But because the generation of other by product in nitro-chlorobenzene is produced makes and also contain nitropheneol impurity in the chlorobenzene extraction liquid except that nitro-chlorobenzene, thereby the chlorobenzene extraction liquid turns back to as raw material and influences quality product in the production.The nitro-chlorobenzene that the recyclable purity of water vapor azeotropic distn is higher, but there are shortcomings such as facility investment is big, energy consumption is high, fluctuation of service, thereby the nitro-chlorobenzene cost recovery is increased, and this method nitro-chlorobenzene rate of recovery is low, and the content of nitro-chlorobenzene is generally 300～400mg/L in the processed waste water.
Visitor in the invention
Purpose of the present invention is exactly in order to address the above problem, propose a kind of invest little, technology is simple, the treatment process of ortho para nitro-chlorobenzene in easy to operate, the recovery chloronitrobenzene producing wastewater that running cost is low.
The present invention is based on a kind of selective adsorption principle, utilize different with absorption avidity between polymeric adsorbent of nitro-chlorobenzene and nitro powder class material in the waste water, adopt polymeric adsorbent as adjacent, p-Nitrophenyl chloride in the sorbent material selective adsorption chloronitrobenzene producing wastewater, and the technology that the nitropheneol material is not adsorbed.
Technical scheme of the present invention is as follows:
The resin absorption of nitro-chlorobenzene reclaims technology in a kind of chloronitrobenzene producing wastewater, and it is made up of the following step:
1) chloronitrobenzene producing wastewater is removed mechanical impurity through pre-treatment;
2) at normal temperatures, will be through the waste water after step 1 is handled, with the flow below the 10BV/h by being filled with the adsorption column of vinylbenzene-divinylbenzene polymeric adsorbent, nitro-chlorobenzene in the Choice of Resin absorption waste water, when the treatment capacity of waste water in 200BV, the water outlet after the absorption contains nitro-chlorobenzene below 2mg/L;
3) use water vapor as the desorbing agent desorption and regeneration polymeric adsorbent that has adsorbed nitro-chlorobenzene in the step 2, desorption temperature is 110-130 ℃;
4) the resulting vapour of step 3, liquid mixture are cooled off the Separation and Recovery nitro-chlorobenzene.
In the step 2 of aforesaid method, polymeric adsorbent can be to have vinylbenzene-divinylbenzene structure polymeric adsorbent, as homemade NDA-16 resin, H-103 resin, CHA-111 resin, JX-101 resin, NK-4006 resin, AB-8 resin or be U.S. AmberliteXAD-4, AmberliteXAD-2 macroporous polystyrene polymeric adsorbent.Wherein preferably NDA-16 resin and AmberliteXAD-4.
In the step 3 of aforesaid method, desorbing agent also can be the organic solvent miscible with water, as methyl alcohol or ethanol, with methyl alcohol or ethanol during as desorbing agent, desorption temperature is 30～45 ℃, and desorption liquid reclaims ethanol and neighbour wherein, p-Nitrophenyl chloride by rectifying separation.
Adopt the present invention to handle chloronitrobenzene producing wastewater, the neighbour in the recoverable wastewater more than 99%, p-Nitrophenyl chloride, regenerant can return rectifying production workshop section to carry out rectifying separation and obtains o-Nitrochlorobenzene and p-Nitrophenyl chloride product.Simultaneously, in the waste liquid after adsorption treatment the content of nitro-chlorobenzene less than 2mg/L.
Embodiment
Further specify the present invention by the following examples.
Embodiment 1:
20mL (about 13g) NDA-16 resin (dagger-axe moral environmental protection Science and Technology Co., Ltd. of Jiangsu Nanjing University produce, down with) filled in (φ 20 * 250mm) in the adsorption column.
Get 4L chloronitrobenzene producing wastewater filter paper filtering, the neighbour of this waste water, the content of p-Nitrophenyl chloride are 1056mg/L.Flow with 200mL/h passes through resin column at normal temperatures, and the content of the nitro-chlorobenzene of absorption effluent is reduced to 1.4mg/L.Resin after the absorption carries out desorption and regeneration with 115 ℃ of water vapors, and desorption liquid can be recycled to 4.18g neighbour, p-Nitrophenyl chloride mixture through cooling, separation.
Embodiment 2:
200mL (about 130g) NDA-16 resin filled in (φ 35 * 500mm) in the adsorption column.
Get the 34L chloronitrobenzene producing wastewater and filter with sand-bed filter, the neighbour of this waste water, the content of p-Nitrophenyl chloride are 1128mg/L.Flow with 1.6L/h passes through resin column at normal temperatures, and the content of the nitro-chlorobenzene of absorption effluent is reduced to 1.8mg/L.Resin after the absorption carries out desorption and regeneration with 115 ℃ of water vapors, and desorption liquid can be recycled to 38.1g neighbour, p-Nitrophenyl chloride mixture through cooling, separation.
Embodiment 3:
Step is with embodiment 2, and the absorption flow velocity changes 1.0L/h into, and its result is basic identical with embodiment 2.
Embodiment 4:
Step is with embodiment 2, and 130 ℃ of water vapors are used in resin regeneration instead, and its result is basic identical with embodiment 2.
Embodiment 5:
20mL (about 13g) NDA-16 resin filled in (φ 20 * 250mm) in the adsorption column.
Get 4L chloronitrobenzene producing wastewater filter paper filtering, the neighbour of this waste water, the content of p-Nitrophenyl chloride are 1056mg/L.Flow with 200mL/h passes through resin column at normal temperatures, and the content of the nitro-chlorobenzene of absorption effluent is reduced to 1.4mg/L.Resin after the absorption as desorbing agent, carries out desorption and regeneration with ethanol under 45 ℃, the ethanol desorption liquid reclaims ethanol through rectifying, and is recovered to 4.18g neighbour, p-Nitrophenyl chloride mixture.
Embodiment 6:
Step is with embodiment 3, and desorbing agent is used methyl alcohol instead, and desorption temperature is 45 ℃, and its result is basic identical with embodiment 3.
Embodiment 5:
Change the NDA-16 resin among the embodiment 1 into H-103 resin (Chemical Plant of Nankai Univ.'s production), CHA-111 resin (production of development chemical plant, changzhou), JX-101 resin (production of Golden Elephant chemical plant, Danyang, Jiangsu), NK-4006 resin (Chemical Plant of Nankai Univ.'s production), AB-8 resin (Chemical Plant of Nankai Univ.'s production), AmberliteXAD-4 resin, AmberliteXAD-2 resin (U.S. Rohm﹠amp; Haas company provides), other operational conditions remain unchanged, and except that every batch processing volume and yield changed, other results were substantially roughly the same.
Claims (1)
1. the resin absorption of nitro-chlorobenzene reclaims technology in the chloronitrobenzene producing wastewater, it is characterized in that it is made up of the following step:
1) chloronitrobenzene producing wastewater is removed mechanical impurity through pre-treatment;
2) at normal temperatures, will by being filled with the adsorption column of vinylbenzene-divinylbenzene polymeric adsorbent NDA-16, make the nitro-chlorobenzene selective adsorption with the flow below the 10BV/h on resin through the waste water after step 1 is handled;
3) use water vapor as the desorbing agent desorption and regeneration polymeric adsorbent that has adsorbed nitro-chlorobenzene in the step 2, desorption temperature is 110-130 ℃;
4) with the resulting vapour of step 3, liquid mixture cooling, Separation and Recovery nitro-chlorobenzene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200410014428.8A CN1233570C (en) | 2004-03-25 | 2004-03-25 | Reclaiming technique by using resin to adsorb nitro chlorobenzene in wastewater from producing nitro chlorobenzene |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200410014428.8A CN1233570C (en) | 2004-03-25 | 2004-03-25 | Reclaiming technique by using resin to adsorb nitro chlorobenzene in wastewater from producing nitro chlorobenzene |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1562789A CN1562789A (en) | 2005-01-12 |
| CN1233570C true CN1233570C (en) | 2005-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200410014428.8A Expired - Fee Related CN1233570C (en) | 2004-03-25 | 2004-03-25 | Reclaiming technique by using resin to adsorb nitro chlorobenzene in wastewater from producing nitro chlorobenzene |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109534532A (en) * | 2018-12-28 | 2019-03-29 | 浙江长征化工有限公司 | 1-CHLORO-2,4-DINITROBENZENE produces the processing method of waste water and implements the equipment of this method |
| CN110252268A (en) * | 2019-06-13 | 2019-09-20 | 江苏南大环保科技有限公司 | A kind of regeneration method of chlorobenzene production waste water absorption resin |
| CN110252269A (en) * | 2019-06-13 | 2019-09-20 | 江苏南大环保科技有限公司 | A kind of resin regeneration method for handling containing high-boiling components waste water |
| CN111302984B (en) * | 2020-04-09 | 2022-02-22 | 利民化学有限责任公司 | Method for recycling acid in synthesis of 2-nitro-4-methylsulfonylbenzoic acid |
| CN111825062A (en) * | 2020-07-28 | 2020-10-27 | 安徽东至广信农化有限公司 | Method for recovering waste sulfuric acid |
| CN114772774B (en) * | 2022-02-21 | 2024-05-28 | 安徽东至广信农化有限公司 | Nitrochlorobenzene production wastewater treatment method |
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- 2004-03-25 CN CN200410014428.8A patent/CN1233570C/en not_active Expired - Fee Related
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| CN1562789A (en) | 2005-01-12 |
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