CN105110544B - A kind of method of macroporous resin treatment diluted alkaline waste water - Google Patents
A kind of method of macroporous resin treatment diluted alkaline waste water Download PDFInfo
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Abstract
The invention discloses a kind of method of macroporous resin treatment diluted alkaline waste water, comprise the following steps：Step (1)：Resin adsorption：Diluted alkaline waste water is through filtering to get filtrate I, and filtrate I flows through macroporous resin adsorption post, obtains treatment fluid；Step (2)：Carbonate is reclaimed：Treatment fluid is through vacuum distillation, and heat filtering obtains carbonate and filtrate II；Step (3)：Solid caustic soda is reclaimed：By filtrate II, heating endures alkali, cooled down again, obtains solid caustic soda.The present invention is adsorbed using macroreticular resin to diluted alkaline waste water, and alkali technique is endured in conjunction with vacuum distillation and high temperature, can effectively reduce the COD value of diluted alkaline waste water, reclaims valuable component in diluted alkaline waste water, and the technical program is simple to operate, it is easy to industrialization；Macroreticular resin regeneration is simple, and the processing cost of diluted alkaline waste water is low.
Description
Technical field
The present invention relates to industrial wastewater recycling treatment field, and in particular to a kind of side of macroporous resin treatment diluted alkaline waste water
Method.
Background technology
Macroreticular resin is a class organic polymer adsorbent, and its aperture is larger with specific surface area, has three inside resin
Dimension space solid pore structure, with physicochemical stability is high, specific surface area is big, adsorption capacity is big, adsorption rate is fast, selectivity is good,
Desorption condition is gentle, regeneration treatment is convenient, usage cycles length, many advantages, such as be suitable for composition closed cycle, save expense, and not
It is dissolved in acid, alkali and various organic solvents.The suction-operated of macroreticular resin and adsorption, surface electrical behavior form hydrogen bond etc. and had
Close, with preferable absorption property.The spherical particle of macroreticular resin often for white, can be divided into nonpolar according to chain link molecular structure
With the major class of polarity two, low pole, middle polarity and highly polar macroreticular resin can be also subdivided into according to polarity size.Macroreticular resin is inhaled
Attached technology is widely used to the multiple fields such as waste water, medicine, chemical industry, analytical chemistry, clinical calibrating and treatment at present.
Macroreticular resin is that, using styrene and acrylate as monomer, addition divinylbenzene is crosslinking agent, and toluene, dimethylbenzene are
Pore-foaming agent, their polymerizations that are cross-linked with each other form porous skeleton structure.After polymer is formed, pore-foaming agent is removed, in resin
Leave hole that is big and small, different, interpenetrating.Therefore, its inside has macroporous absorbent resin in the dry state
There is higher porosity, and aperture is larger, between 100~1000nm, therefore referred to as macroreticular resin.The surface area of macroreticular resin compared with
Greatly, exchange velocity is fast, high mechanical strength, contamination resistance are strong, thermally-stabilised good, can be used in the aqueous solution and non-aqueous solution.
Macroreticular resin is the separation material that adsorptivity and screening property principle are combined, and based on this principle, organic compound is according to absorption affinity
Difference and molecular size range, elute and separate through certain solvent on macroporous absorbent resin.
Alkaline waste water is most common class waste water in industrial wastewater, not only contains bases, also comprising organic matter and inorganic
Thing etc..Its wide material sources, essentially from the black liquor of papermaking, printing and dyeing industry boils yarn, mercerising wash water, the ash alkali unhairing of leather industry
Waste water produced in waste water and oil, chemical process etc..
If alkaline waste water is just directly discharged without processing, by corrosion pipeline, canal and its structure；Being discharged into water body can change
The pH value of water body, influences the self purification of water body, destroys the natural, ecological of water body；Soil property salinization of soil can then be caused by penetrating into soil,
The pine for destroying soil layer dredges state, influences the growth of plant.In addition, containing substantial amounts of organic matter in waste water, it can consume in water body
Dissolved oxygen, causes aerobe anoxia asphyxia in water body dead.If the mankind eat the higher alkaline water of concentration by mistake, metabolism will
It is affected, finally results in the imbalance of digestive system.Therefore, alkaline waste water must can just be emitted into receiving water body after processing.
The physical chemistry method of processing alkaline waste water has the side such as acid-base neutralization method, flocculence, chemical precipitation method, crystallisation at present
Method.Such as, Publication No. CN104098206A Chinese patent literature discloses a kind of printing and dyeing of use macroreticular resin pretreatment and given up
Water depth treatment for reuse method, comprises the following steps：Step 1: Fenton's reaction：Secondary treatment of dyeing and printing effluents water outlet acid adding is taken to adjust
PH value is saved to 3 to 6, Fenton's reaction is then carried out, Fenton's reaction adds alkali to adjust pH value to 7 to 8, adds polyacrylamide after terminating
Amine carries out coagulation, precipitation；Step 2: ultrafiltration membrance filter：Take the supernatant after step one precipitation to carry out ultrafiltration membrance filter, surpassed
Filter membrane water outlet and milipore filter concentrated water；Step 3: macroporous resin adsorption：The milipore filter water outlet obtained in step 2 is entered main by macropore
The macroreticular resin reactor adsorption treatment that resin is constituted, milipore filter concentrate recirculation is mixed with secondary treatment yielding water, circular treatment；Step
Rapid four：Reverse osmosis membrane separation：The main reverse osmosis membrane separation being made up of reverse osmosis membrane is entered in macroporous resin adsorption water outlet in step 3
System, reverse osmosis membrane produce water as a kind of high-quality with water be used for Enterprises utilization, the concentrated water qualified discharge of reverse osmosis membrane or
Pipe of receiving is discharged into sewage plant and focused on.This method process step is cumbersome, and cost for wastewater treatment is high.
Existing alkaline waste water treatment method is not only difficult to handle the hardly degraded organic substance in waste water, and does not consider to reclaim profit
With the valuable constituent in waste water.
The content of the invention
The invention provides a kind of method of macroporous resin treatment diluted alkaline waste water, diluted alkaline waste water is preprocessed, macroreticular resin
Absorption, vacuum distillation and high temperature endure alkali process, finally give carbonate, solid caustic soda and processing water outlet；The technical program is not only realized
The advanced treating of diluted alkaline waste water, and realize the recycling of diluted alkaline waste water.
A kind of method of macroporous resin treatment diluted alkaline waste water, is carried out according to the following steps：
Step (1)：Resin adsorption：Diluted alkaline waste water is through filtering to get filtrate I, and filtrate I flows through macroporous resin adsorption post, must handle
Liquid；
Step (2)：Carbonate is reclaimed：Treatment fluid is through vacuum distillation, and heat filtering obtains carbonate and filtrate II；
Step (3)：Solid caustic soda is reclaimed：By filtrate II, heating endures alkali, cooled down again, obtains solid caustic soda.
In the technical program, diluted alkaline waste water is endured alkali process and realized through filtering, macroporous resin adsorption, vacuum distillation and heating
The advanced treating of diluted alkaline waste water, can effectively reclaim the active principle in diluted alkaline waste water, realize the recycling of diluted alkaline waste water.
Preferably, the pH value of described diluted alkaline waste water is more than 9.
Further preferably, described diluted alkaline waste water is mainly derived from dyeing production waste water.
Still more preferably, described dyeing production waste water mainly contains alkali, carbonate.
Under normal circumstances, the complicated component of diluted alkaline waste water, in order to reduce injury of the diluted alkaline waste water to macroreticular resin aperture,
Filtration treatment is first carried out to diluted alkaline waste water before carrying out macroporous resin adsorption, to filter out the impurity such as the mechanical solid waste in diluted alkaline waste water.
In order to improve the filter efficiency of diluted alkaline waste water, the treatment effect of diluted alkaline waste water is improved, preferably, diluted alkaline waste water mistake
First pre-processed before filter through adsorbent and/or flocculant.Diluted alkaline waste water after the absorption of adsorbent and/or the flocculation of flocculant,
Refilter, resulting filtrate (filtrate I) carries out the absorption of macroreticular resin again.
The selection of specific pretreatment mode need to be determined according to the composition of diluted alkaline waste water, as diluted alkaline waste water COD and colourity compared with
Height, preferably, being added to diluted alkaline waste water after adsorbent, 30~60min of stirring reaction, filtering produces filtrate I.
Preferably, described adsorbent is activated carbon, diatomite, activated alumina, silica gel, one kind of zeolite molecular sieve
Or it is several.
The dosage of described adsorbent is the 0.05%~1% of diluted alkaline waste water weight.
Described flocculant is FeSO4·7H2O, bodied ferric sulfate, polyaluminium sulfate, PAFS, polyaluminium
One or more in aluminium, poly-ferric chloride；The dosage of flocculant is the 0.01~1% of diluted alkaline waste water weight.
Filtrate I enters the adsorption column filled with macroreticular resin, and adsorbing separation obtains treatment fluid.Preferably, step (1)
In, macroreticular resin selects strong-base anion-exchange resin.
Further preferably, the macroreticular resin selects styrene series anion exchange resin.
Macroporous absorbent resin is that the additives such as a class organic monomer plus crosslinking agent, pore-foaming agent, dispersant are polymerized, thus
The resin that purchase comes will remove toxicity organic residue that may be present.Macroreticular resin is before equipment fills out post, according to GB/T 5476-
2013 methods are pre-processed to macroreticular resin.
Preferably, in step (1), the flow velocity that filtrate I flows through macroporous resin adsorption post is 1BV/h~4BV/h.
Under the flow velocity, the COD clearances of diluted alkaline waste water are high, and treatment effeciency is high.Flow velocity is more than 4BV/h, to macropore
The impulsive force of resin absorbing column is easily reduced post effect than larger, and the too fast COD for being likely to decrease diluted alkaline waste water of flow velocity is removed
Rate；Flow velocity is less than 1BV/h, and the treatment effeciency of alkaline waste water is too low.
The organic impurities and pigment obtained after step (1) absorption in treatment fluid, treatment fluid is all fewer, and treatment fluid is by step
Suddenly the vacuum distillation of (2), concentrate is filtered while hot, the carbonate in recycle process fluids.
The condensate liquid of vacuum distillation is processing water outlet, and obtained processing water outlet is in line, also can reuse to step (1)
The regeneration of macroporous resin adsorption post, can also be used as the condensation water in diluted alkaline wastewater treatment process.
Preferably, in step (2), heat filtering temperature is with 30~50 DEG C.
Heat filtering at such a temperature, the colourity for the carbonate being recovered by filtration is relatively good, and purity is higher, the filtrate being filtrated to get
III is transferred in solid caustic soda pot, and heating is evaporated up to a large amount of solid caustic soda of precipitation.
By the vacuum distillation of step (2), most of water in treatment fluid is reclaimed, the moisture of obtained filtrate III
Not high, the evaporation for being beneficial to the alkali of step (3) is reclaimed, and advantageously reduces the processing energy consumption of diluted alkaline waste water.
In step (3), the solid caustic soda pot used can bear to endure the temperature needed for alkali for common iron pot, the iron pot.
Preferably, in step (3), the temperature for enduring alkali is 450~480 DEG C.
Further preferably, in step (3), the temperature for enduring alkali is 460~470 DEG C.
Preferably, in step (3), the time for enduring alkali collection solid caustic soda is 0.5-1.5h.
Further preferably, in step (3), the time for enduring alkali collection solid caustic soda is 1h.
Macroporous resin adsorption post is after Reusability, macroreticular resin surface and many non-adsorbent compositions or miscellaneous of internal residual
Matter, post darkens, post effect reduction.In order to improve the treatment effect of diluted alkaline waste water, the processing cost of diluted alkaline waste water, macropore are reduced
Resin needs washing in time, regeneration.
Preferably, also including step (4), macroreticular resin is regenerated, regeneration step is：
Step is 1.：Clear water is washed；
Step is 2.：Eluent gradient elution；
Step is 3.：Washed again with clear water after the completion of gradient elution.
Clear water described herein is condensate liquid (processing water outlet), running water or the pure water that step (2) or step (3) are distilled.
In regenerative process, 1. step mainly elutes, the diluted alkaline waste water of displacement macroporous resin adsorption, step 2. mainly washing, displacement
The organic matter of macroporous resin adsorption；The eluent that 3. step is mainly washed, replaced in macroreticular resin.
Preferably, described eluent is the mixed liquor of aqueous acid and organic solvent, wherein aqueous acid is hydrochloric acid
The aqueous solution or aqueous sulfuric acid, organic solvent are methanol, ethanol or acetone.
Further preferably, step 2. in, eluted by with Gradient：
Eluent：VOrganic solvent：V10% aqueous acid=1:1, according to 1BV/h flow velocitys, macropore tree is squeezed into by peristaltic pump adverse current
Fat adsorption column, is once eluted waste liquid 1BV；
Secondary eluent：VOrganic solvent：V5% aqueous acid=1:1, according to 1BV/h flow velocitys, macropore tree is squeezed into by peristaltic pump adverse current
Fat adsorption column, obtains secondary elution waste liquid 1BV；
Three eluents：VOrganic solvent：V2.5% aqueous acid=1:1, according to 1BV/h flow velocitys, macropore tree is squeezed into by peristaltic pump adverse current
Fat adsorption column, collects 0.5BV, plus follow-up emptied of water 0.5BV, obtains three elution waste liquid 1BV.
The parameters such as content of organics, the COD value of elution waste liquid come out by HPLC real-time tracking gradient elutions, according to need
Decide whether to carry out the 4th elution process, ibid, each elution waste liquid according to circumstances decides whether back to apply mechanically.
Using above-mentioned gradient elution, the regeneration effect of macroreticular resin can be improved.After the completion of the gradient elution of step 2., then enter
The clear water washing of row step 3., so as to complete the regeneration of macroporous resin adsorption post.
Macroporous resin adsorption post is after multiple diluted alkaline waste water adsorption treatment and regeneration, macroporous resin adsorption post resin
Grain extrudes tension and is possible to fraction and crushes；Impurity in post is more, color is deeper.In order to which the post for improving macroreticular resin is imitated,
Increase the treatment effect of diluted alkaline waste water, it is necessary to macroreticular resin is transferred out, be placed in a larger container, then with clear water, wash
De- liquid, clear water regenerated from washing, after the completion of regeneration, then fill out post again.
The elution waste liquid of regenerative elution is mainly acid and benzene through distilling recoverable organic solvent, remaining vinasse
Amine substance, handles raffinate, the filtrate after filtering is clean acid solution, can be back to resin and wash using the method for formaldehyde condensation
During de-.
The present invention is adsorbed using macroreticular resin to diluted alkaline waste water, and alkali technique, energy are endured in conjunction with vacuum distillation and high temperature
Effectively the COD value of reduction diluted alkaline waste water, reclaims valuable component in diluted alkaline waste water, and the technical program is simple to operate, it is easy to produce
Industry；And macroreticular resin regeneration is simple, the processing cost of diluted alkaline waste water is low.
Brief description of the drawings
Fig. 1 is production technological process of the invention.
Embodiment
The COD of the present invention is determined using potassium bichromate National Standard Method, and pH is determined using acidometer.
Embodiment 1
The diluted alkaline waste water produced during the production of certain dyestuff company is indigo, mainly contains sodium hydroxide, potassium hydroxide, carbonic acid
The inorganic matter such as sodium and potassium carbonate, other organic matters are aniline, methylphenylamine, ortho-aminobenzoic acid, ammonia, ammonium salt etc..After measured
The COD of waste water is 4786mg/L, C (OH-)=3.4mol/L, C (CO3 2-)=0.3mol/L.
Process step：
Step (1) resin adsorption：0.3% activated carbon (on the basis of the quality of diluted alkaline waste water) is added into diluted alkaline mother liquor,
After stirring reaction 30min, filtrate I is separated by filtration to obtain.Then filtrate I flows through styrene series anion exchange resin adsorption column, stream
Speed is 1BV/h, obtains treatment fluid, and treatment fluid COD is 383mg/L, and treatment fluid COD clearance is 92%.
Step (2) carbonate is extracted：Treatment fluid is cooled to 40 DEG C and is separated by filtration to obtain carbonate, filter through being concentrated under reduced pressure after 4 times
Liquid II and processing water outlet, wherein the COD of processing water outlet is 56mg/L, COD clearance is 98.8%.
Step (3) solid caustic soda is extracted：Filtrate II is placed in reactor, 450~480 DEG C are heated to, is incubated at a temperature of this
1h is reacted, cooling produces solid caustic soda.
Step (4)：Resin regeneration：Desorption and regeneration is carried out to macroporous resin adsorption post by the following method：
1. clear water is washed step：Elute the diluted alkaline waste water in macroreticular resin：
Clear water squeezes into macroporous resin adsorption post according to 1BV/h flow velocitys by peristaltic pump adverse current, passes through HPLC real-time trackings acid
The parameters such as residual concentration (wt%), COD value, decide whether to carry out continuation washing as needed, washings out can be returned
Go to apply mechanically.
Step is 2.：Eluent gradient elution：
Eluent：VMethanol：V10% sulfuric acid solution=1:1, according to 1BV/h flow velocitys, macroreticular resin is squeezed into by peristaltic pump adverse current
Adsorption column, is once eluted waste liquid 1BV, and eluent according to circumstances decides whether back to apply mechanically；
Secondary eluent：VMethanol：V5% sulfuric acid solution=1:1, according to 1BV/h flow velocitys, macroreticular resin is squeezed into by peristaltic pump adverse current
Adsorption column, obtains secondary elution waste liquid 1BV, and eluent according to circumstances decides whether back to apply mechanically；
Three eluents：VMethanol：V2.5% sulfuric acid solution=1:1, according to 1BV/h flow velocitys, macroreticular resin is squeezed into by peristaltic pump adverse current
Adsorption column, collects 0.5BV, plus follow-up emptied of water 0.5BV, obtains three elution waste liquid 1BV, and elution waste liquid is according to circumstances determined
Whether go back to apply mechanically；
The parameters such as content of organics (wt%), the COD value of elution waste liquid of HPLC real-time tracking above gradient elution processes,
Decide whether to carry out the 4th elution process as needed.
The elution waste liquid being collected into reclaims methanol through vacuum distillation, and remaining sour raffinate can be back to resin through formaldehyde condensation
In elution process.
3. clear water is washed step：Wash the eluent in macroreticular resin.
Clear water squeezes into macroporous resin adsorption post, real-time tracking acid residual concentration according to 1BV/h flow velocitys by peristaltic pump adverse current
(wt%), the parameter such as organic concentration (HPLC), COD value, residual methanol content, decides whether to continue to wash as needed
Wash, until meeting the requirements.
Embodiment 2
The diluted alkaline waste water produced during the production of certain dyestuff company is indigo, mainly contains sodium hydroxide, potassium hydroxide, carbonic acid
The inorganic matter such as sodium and potassium carbonate, other organic matters are aniline, methylphenylamine, ortho-aminobenzoic acid, ammonia, ammonium salt etc..After measured
The COD of waste water is 5238mg/L, C (OH-)=3.4mol/L, C (CO3 2-)=0.3mol/L.
Compared with Example 1, other treatment conditions keep constant, change the flow velocity that waste water flows through macroporous resin adsorption post,
Flow velocity is improved to 4BV/h, and the COD of obtained treatment fluid is 1284mg/L, and treatment fluid COD clearance is 75%.It follows that
When waste water flow velocity is slower, macroreticular resin can preferably adsorb the organic matter in waste water, and the effect for handling waste water is preferable.
Embodiment 3
The diluted alkaline waste water produced during the production of certain dyestuff company is indigo, mainly contains sodium hydroxide, potassium hydroxide, carbonic acid
The inorganic matter such as sodium and potassium carbonate, other organic matters are aniline, methylphenylamine, ortho-aminobenzoic acid, ammonia, ammonium salt etc..After measured
The COD of waste water is 4786mg/L, C (OH-)=3.4mol/L, C (CO3 2-)=0.3mol/L.
Compared with Example 1, other treatment conditions are constant, without activated carbon, mother liquor directly filter after through macroreticular resin
Adsorption column processing, flow velocity keeps constant, and the obtained inclined chartreuse for the treatment of fluid, COD is 727mg/L, treatment fluid COD clearance
For 85%.As can be seen here, the colourity of diluted alkaline mother liquor and during COD higher, after macroporous resin adsorption post after can first being pre-processed,
So water treatment effect is more preferably.
Embodiment 4
Compared with Example 3, other treatment conditions are constant, add Polyferric Sulfate Flocculants, and the addition of flocculant is
The 0.1wt% of diluted alkaline waste water weight, is handled after filtering through macroporous resin adsorption post, and flow velocity keeps constant, and obtained treatment fluid is inclined
Chartreuse, COD is 536mg/L, and treatment fluid COD clearance is 89%.As can be seen here, the colourity and COD of diluted alkaline mother liquor compared with
Gao Shi, the pretreatment of flocculant is conducive to improving water treatment effect.
Embodiment 5
The alkaline waste water that printing and dyeing company produces, mainly contains sodium hydroxide and a small amount of carbonate and other organic matters, passes through
The COD for determining waste water is 4378mg/L, C (OH-)=2.7mol/L, C (CO3 2-)=0.2mol/L.
Process step：
Step (1) resin adsorption：0.2% activated carbon (on the basis of the quality of diluted alkaline waste water) is added into diluted alkaline mother liquor,
After stirring reaction 30min, filtrate I is separated by filtration to obtain.Then filtrate I flows through styrene series anion exchange resin adsorption column, stream
Speed is 1.5BV/h, obtains treatment fluid, and its COD is 401mg/L, and treatment fluid COD clearance is 91%.
Resin regeneration：Clear water elution+sulfuric acid and methanol gradient elution+clear water elution, macroreticular resin can be again after three elution
It is secondary to utilize.
Step (2) carbonate is extracted：Treatment fluid is cooled to 40 DEG C and is separated by filtration to obtain carbonate, filtrate after being concentrated under reduced pressure
II and processing water outlet, wherein the COD of processing water outlet is 86mg/L, COD clearance is 98.0%.
Step (3) solid caustic soda is extracted：Filtrate II is placed in reactor, 450~480 DEG C are heated to, is incubated at a temperature of this
1h is reacted, cooling produces solid caustic soda.
The desorption and regeneration of macroporous resin adsorption post is referring to embodiment 1.
Embodiment 6
Knitwear mercerising wash water alkali lye, wherein containing sodium hydroxide, sodium carbonate and partial organic substances, waste water after measured
COD is 2873mg/L, C (OH-)=0.7mol/L, C (CO3 2-)=0.1mol/L.
Process step：
Step (1) resin adsorption：Filtrate I is produced after the filtering of diluted alkaline mother liquor, then filtrate I flows through styrene series anion friendship
Resin absorbing column is changed, flow velocity is 2BV/h, obtains treatment fluid, its COD is 145mg/L, treatment fluid COD clearances are 95%.
Resin regeneration：Clear water elution+sulfuric acid and methanol gradient elution+clear water elution, macroreticular resin can be again after three elution
It is secondary to utilize.
Step (2) carbonate is extracted：Treatment fluid is cooled to 40 DEG C and is separated by filtration to obtain carbonate, filtrate after vacuum distillation
II and processing water outlet, wherein the COD of processing water outlet is 33mg/L, COD clearance is 98.8%.
Step (3) solid caustic soda is extracted：Filtrate II is placed in reactor, 450~480 DEG C are heated to, is incubated at a temperature of this
1h is reacted, cooling produces solid caustic soda.
The desorption and regeneration of macroporous resin adsorption post is referring to embodiment 1.
Claims (7)
1. a kind of method of macroporous resin treatment diluted alkaline waste water, it is characterised in that comprise the following steps：
Step (1)：Resin adsorption：Diluted alkaline waste water is through filtering to get filtrate I, and filtrate I flows through macroporous resin adsorption post, obtains treatment fluid；
The macroreticular resin is D201 macroporous type strong-base anion-exchange resins；
Described diluted alkaline waste water be indigo generation waste water, the inorganic matter mainly contained be sodium hydroxide, potassium hydroxide, sodium carbonate,
Potassium carbonate, ammonia and ammonium salt, the organic matter contained are aniline, methylphenylamine and/or ortho-aminobenzoic acid；
Step (2)：Carbonate is reclaimed：Treatment fluid is through vacuum distillation, and heat filtering obtains carbonate and filtrate II；
Step (3)：Solid caustic soda is reclaimed：By filtrate II, heating endures alkali, cooled down again, obtains solid caustic soda；
Step (4)：Macroreticular resin is regenerated, regeneration step is：
Step is 1.：Clear water is washed；
Step is 2.：Eluted by with Gradient：
Eluent：VOrganic solvent：V10% aqueous acid=1:1, according to 1BV/h flow velocitys, squeeze into macroreticular resin by peristaltic pump adverse current and inhale
Attached column, is once eluted waste liquid 1BV；
Secondary eluent：VOrganic solvent：V5% aqueous acid=1:1, according to 1BV/h flow velocitys, macroporous resin adsorption is squeezed into by peristaltic pump adverse current
Post, obtains secondary elution waste liquid 1BV；
Three eluents：VOrganic solvent：V2.5% aqueous acid=1:1, according to 1BV/h flow velocitys, squeeze into macroreticular resin by peristaltic pump adverse current and inhale
Attached column, collects 0.5BV, plus follow-up emptied of water 0.5BV, obtains three elution waste liquid 1BV；
Eluent is the mixed liquor of aqueous acid and organic solvent, and wherein aqueous acid is aqueous hydrochloric acid solution or aqueous sulfuric acid,
Organic solvent is methanol, ethanol or acetone；
Step is 3.：Washed again with clear water after the completion of gradient elution.
2. the method for macroporous resin treatment diluted alkaline waste water as claimed in claim 1, it is characterised in that described diluted alkaline waste water
PH value is more than 9.
3. the method for macroporous resin treatment diluted alkaline waste water as claimed in claim 1, it is characterised in that before diluted alkaline waste water filtering first
Pre-processed through adsorbent and/or flocculant.
4. the method for macroporous resin treatment diluted alkaline waste water as claimed in claim 3, it is characterised in that described adsorbent is work
Property charcoal, diatomite, activated alumina, silica gel, the one or more of zeolite molecular sieve.
5. the method for macroporous resin treatment diluted alkaline waste water as claimed in claim 1, it is characterised in that in step (1), filtrate I
The flow velocity for flowing through macroporous resin adsorption post is 1BV/h~4BV/h.
6. the method for macroporous resin treatment diluted alkaline waste water as claimed in claim 1, it is characterised in that in step (2), heat filtering
Temperature is with 30~50 DEG C.
7. the method for macroporous resin treatment diluted alkaline waste water as claimed in claim 1, it is characterised in that in step (3), endure alkali
Temperature is 450~480 DEG C.
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| CN1364733A (en) * | 2001-08-27 | 2002-08-21 | 南京大学 | Waste water treating and resource recovering method for 1,2-diazo-oxy-naphthalene-4-sulfonic acid production |
| FR2874217B1 (en) * | 2004-08-10 | 2006-10-27 | Agronomique Inst Nat Rech | GLYCEROL POLYCARBONATE - ORGANIC COMPOSITIONS CONTAINING THE SAME - PROCESS FOR OBTAINING THESE ORGANIC COMPOSITIONS AND METHOD FOR EXTRACTING GLYCEROL POLYCARBONATE AND THEIR APPLICATIONS |
| CN104671573B (en) * | 2015-01-23 | 2016-09-14 | 浙江奇彩环境科技股份有限公司 | A kind of method based on absorption spectrum comprehensive control nitroaniline waste water |
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