CN106315891A - Dephenolizing method and dephenolizing device for phenol-containing wastewater generated in phenol refining - Google Patents
Dephenolizing method and dephenolizing device for phenol-containing wastewater generated in phenol refining Download PDFInfo
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Abstract
The invention provides a dephenolizing method and a dephenolizing device for phenol-containing wastewater generated by phenol refining. Dephenolized light oil of the existing light oil cleaning process is used as an extracting agent to be extracted and dephenolized with the phenol-containing wastewater, the extracted rich oil is returned to a light oil cleaning tower to be subjected to back extraction, the sodium phenolate is recovered by utilizing the reaction of free alkali in the alkaline sodium phenolate and phenol in the rich oil, and the dephenolized wastewater is sent to a coal gas purification wastewater treatment system. The method has the advantages of compactness, simplicity, low equipment investment cost, no auxiliary material consumption, high cyclic utilization rate of the waste water dephenolizing extraction agent, high waste water dephenolizing and deoiling rate, contribution to improving the quality of the sodium phenolate in the fraction dephenolizing device, reduction of the consumption of sulfuric acid in the phenolate decomposition device and the like.
Description
Technical field
The invention belongs to the industrial treatment technical field of Coal Chemical Industry phenol wastewater, be specifically related to a kind of phenol treating high-concentration phenolic wastewater
Dephenolization method and device
Background technology
In the phenol treating production technology extracting crude phenols from coal tar, can produce substantial amounts of high-concentration phenolic wastewater, phenol is that this gives up
High toxicity and the Organic substance of difficult degradation in water, phenol wastewater will produce large effect to subsequent biochemical mud production process.Phenol
The prior art that refined wastewater processes is a lot, and the technology close with present patent application is, " coal tar gives up Chinese invention patent
Method for treating water and system " (application publication number CN 101875523 A), its technical characteristic is, 1) remove waste water free oil and
Oil emulsion, 2) employing N-503 extractant dephenolize, 3) use NaOH that the extraction phase containing phenol is carried out back extraction, it is separately recovered
Extractant and phenates, 4) removing sulfide." Coal Tar Wastewater processing method and system " uses N-503 conduct at extraction process
Extractant, uses NaOH as strippant in back extraction operation.Chinese invention patent " a kind of Coal Chemical Industry phenol wastewater extraction
The method of dephenolize " (application publication number CN 102336451 A), its technical characteristic is, 1) to use methyl-tert the eleventh of the twelve Earthly Branches base ether be main body
Extractant, 2) method recycling design and the crude phenols of rectification are used.
The defect of above-mentioned document and prior art is, N-503, NaOH that extraction and back extraction operation are used are all non-coal tar
The side-product of oil production process, needs outsourcing, and consumption is relatively big, and according to measuring and calculating, often reclaiming 1000 kilograms of crude phenols needs to consume
NaOH solution 2000 kilograms, consumes N-503 solution 44 kilograms.Thus can estimate, the phenol treating of a set of 4000kg/h contains phenol
Waste water processes, and needs to occur N-503 and NaOH solution purchase commodity 1,620,000 yuan every year, relatively costly.
Summary of the invention
The problem high in order to solve existing phenol treating phenol wastewater dephenolize technical costs, it is an object of the invention to provide a kind of phenol
The dephenolization method of the refined phenol wastewater produced and device, it is proposed that a kind of phenol treating without purchasing chemical industry adjuvant separately is given up containing phenol
Method for treating water.
Technical scheme is as follows:
The dephenolization method of the phenol wastewater that a kind of phenol treating produces, it is characterised in that comprise the steps:
(1) the phenol wastewater extracting and dephenolizing that phenol treating produces:
Phenol treating phenol wastewater and dephenolize light oil are mixed into static mixer, make two kinds of fluids be sufficiently mixed, enter back into profit and divide
From device, stand, form rich oil and dephenolize waste water, described in the dephenolize waste water that obtains export under oil water separator and enters gas purification
Waste Water Treatment；
(2) rich oil back extraction dephenolize:
The rich oil obtained by step (1) is extracted out from the top of described oil water separator, through the lower entrances entrance of light oil washing column
Light oil washing column；
The alkaline sodium phenolate sent here by naphtalene oil dephenolize device, through the upper entrance entrance light oil washing column of light oil washing column；
In light oil washing column, the most described alkalescence sodium phenolate and described rich oil counter current contacting from bottom to top, make in rich oil
Phenol removed by alkalescence sodium phenolate back extraction, obtain dephenolize light oil and neutral phenol sodium salt, described dephenolize light oil enters step (1)
Described in static mixer, be circulated utilization；Described neutral phenol sodium salt enters the phenol salt de device of next procedure.
Dephenolization method according to the phenol wastewater that phenol treating of the present invention produces, it is preferred that oil in described step (1)
Standing separation in water separator, the temperature of oil water separator is 50-60 DEG C.
Dephenolization method according to the phenol wastewater that phenol treating of the present invention produces, it is preferred that in described step (2)
To dephenolize light oil through subcooler laggard enter static mixer.
Dephenolization method according to the phenol wastewater that phenol treating of the present invention produces, it is preferred that described phenol treating phenol wastewater comes
From phenol treating operation, described phenol treating phenol wastewater contains phenol concentration 10000～20000mg/L, oil concentration 3000～5000mg/L.
Further, described phenol treating phenol wastewater concentration 13500mg/L in phenol, oil concentration 3300mg/L.
Dephenolization method according to the phenol wastewater that phenol treating of the present invention produces, it is preferred that described phenol treating phenol wastewater
Inflow 3000～5000kg/h.Further, described phenol treating phenol wastewater inflow 4000kg/h.
Dephenolization method according to the phenol wastewater that phenol treating of the present invention produces, it is preferred that institute in described step (1)
State phenol treating phenol wastewater and enter static mixer with dephenolize light oil 1:1～3:1 by volume, more preferably 1:1.
Dephenolization method according to the phenol wastewater that phenol treating of the present invention produces, it is preferred that alkali in described step (2)
The flow 4000Kg/h of property sodium phenolate, free alkali 2～4%, further preferred free alkali 4%.
Dephenolization method according to the phenol wastewater that phenol treating of the present invention produces, it is preferred that light in described step (2)
In oil washing column, alkalescence sodium phenolate and rich oil 1:1～2:1 by volume, further preferred 1:1.
The present invention also provides for the device of the dephenolization method of a kind of phenol wastewater applying described phenol treating to produce, it is characterised in that institute
State dephenolize device and include that static mixer 1, described static mixer 1 are connected with oil water separator 2, at described profit by pipeline
The bottom of separator 2 arranges dephenolize wastewater outlet, arranges oil rich outlet, described oil rich outlet on the top of described oil water separator 2
It is connected with light oil washing column 5 by pipeline, the pipeline between described oil rich outlet and light oil washing column 5 arranges rich oil pump 3,
The top of described light oil washing column 5 is connected with cooler 6 by light oil circulating pump 7, described cooler 6 again with described static mixer
1 connects, and arranges the outlet of neutral phenol sodium salt in the bottom of described light oil washing column 5.
According to the dephenolize device of the phenol wastewater that described phenol treating produces, further, described dephenolize wastewater outlet by pipeline and gives up
Water pump 4 connects.
The present patent application 1) use dephenolize light oil as extractant to phenol wastewater dephenolize, 2) use alkalescence sodium phenolate as instead
Extractant carries out back extraction to the rich oil after extraction, reclaims dephenolize light oil extractant, and obtains neutral phenates.
It is an object of the invention to, overcome existing phenol treating phenol wastewater dephenolize technology to need separately to purchase the defect of chemical industry adjuvant, carry
Go out a kind of phenol treating phenolic wastewater treatment method without purchasing chemical industry adjuvant separately.
The technical scheme of the present patent application is:
1) utilize the dephenolize light oil of light oil washing column institute output of coal chemical industry enterprises normal process steps-fraction dephenolizing device as extraction
Agent, to phenol treating phenol wastewater extracting and dephenolizing.After waste water extracting and dephenolizing, it will produce dephenolize waste water and two kinds of materials of rich oil.Its
In, dephenolize waste water delivers to next procedure gas purification remained ammonia processing system, and rich oil is then delivered to fraction dephenolizing device light oil and cleaned
Tower entrance, as the makeup oil of fraction dephenolizing device.
2) utilize the alkaline sodium phenolate of fraction dephenolizing device last process naphtalene oil dephenolize device institute output as strippant, to richness
Oil back extraction dephenolize.After rich oil back extraction dephenolize, it will produce dephenolize light oil and two kinds of materials of neutral phenol sodium salt.Wherein, dephenolize
Phenol treating phenol wastewater extracting and dephenolizing operation delivered to by light oil, and as removing phenol in waste water extractant, neutral phenol sodium salt then delivers to next procedure
Phenol salt de device.
Beneficial effect
The present invention provides dephenolization method and the device of the phenol wastewater that a kind of phenol treating produces:
(1) need not separately purchase and process raw material.
(2) in the case of not occurring separately to purchase and processing raw material, owing to the present patent application make use of coal chemical industry enterprises usual means-fraction
The dephenolize light oil of dephenolize device output is as the extractant of removing phenol in waste water, therefore without arranging extractant groove and affiliated facility thereof separately.
(3) in the case of not occurring separately to purchase and processing raw material, owing to the present patent application make use of coal chemical industry enterprises usual means-fraction
Dephenolize device light oil washing column is as rich oil stripping cells, therefore without arranging reextractor and affiliated facility thereof separately.
(4) in the case of not occurring separately to purchase and processing raw material, due to the phenol wastewater phenol removal process of the present patent application used de-
Phenol light oil has a strongest separating phenols substance characteristics, therefore before the concentration containing phenol of phenol wastewater can be made by extracting
13500-17000mg/L is reduced to 1350-2550mg/L, and dephenolize efficiency is up to 83-91%, and the waste water after dephenolize can directly send
To next procedure-gas purification remained ammonia processing system.
(5) in the case of not occurring separately to purchase and processing raw material, the alkaline phenol used due to the rich oil back extraction operation of the present patent application
Sodium salt has the characteristic of the strongest removing aldehydes matter, and can make rich oil is dropped to 1.4% containing phenol amount by 3.2% before back extraction,
This amount in phenol is lower than the 1.8% of the dephenolize light oil amount in phenol, thus reduces the dephenolize extractant of phenol wastewater fully.
(6) in the case of not occurring separately to purchase and processing raw material, take off owing to the rich oil back extraction operation of the present patent application employs fraction
Phenol device needs alkalescence phenol sodium to be processed as strippant, the method, it will help the production efficiency of fraction dephenolizing device, can
The free alkali content promoting the alkaline sodium phenolate of fraction dephenolizing device is reduced to less than 2% by 2-4%, and alkalescence sodium phenolate free alkali contains
After amount reduces, it is beneficial to improve sodium phenolate quality, and reduces the sulfuric acid consumption of its next procedure-phenol salt de device.
(7) a kind of phenol treating phenol wastewater dephenolization method and device have device arrange compact, equipment investment expense low,
Without supplementary product onsumption, removing phenol in waste water extractant cyclic utilization rate is high, removing phenol in waste water oil removal rate is high, and is favorably improved distillate dephenolizing dress
Put sodium phenolate quality, reduce the advantages such as phenol salt de device sulfuric acid consumption.
Accompanying drawing illustrates:
The phenol treating phenol wastewater dephenolize device flow chart that Fig. 1: the present invention provides.
Fig. 2: " Coal Tar Wastewater processing method and system " process chart in prior art.
In figure: 1 static mixer, 2 oil water separators, 3 rich oil pumps, 4 waste water pumps, 5 light oil washing columns, 6 coolers, 7
Light oil circulating pump.
Detailed description of the invention
In order to be more fully understood that the present invention, it is further elucidated with present disclosure below in conjunction with embodiment, but present disclosure is not
It is limited only to the following examples.
Embodiment 1
Such as accompanying drawing, a kind of phenol treating phenol wastewater dephenolization method process chart, described a kind of phenol treating phenol wastewater dephenolize side
The operation of method, one is, phenol treating phenol wastewater extracting and dephenolizing, and it two is, rich oil back extraction dephenolize.Described phenol treating contains phenol
Waste water extracting and dephenolizing operation is realized by static mixer 1, oil water separator 2, rich oil pump 3, waste water pump 4 equipment；Described richness
Oil back extraction operation is realized by light oil washing column 5, cooler 6, light oil circulating pump 7 equipment.
The dephenolization method of the phenol wastewater that a kind of phenol treating produces, comprises the steps:
(1) described phenol treating phenol wastewater extracting and dephenolizing operation realizes process is that the phenol treating sent here by phenol treating operation contains phenol
The dephenolize that waste water (water yield 4000kg/h, containing phenol concentration 13500mg/L, oil concentration 3300mg/L) is sent here with cooler 6
Light oil (containing phenol amount 2.0%), by 1:1 volume ratio, after converging at 8, delivers to static mixer 1 on the left of static mixer 1,
In static mixer 1, by means of the rotary mixed cell of static mixer 1, make dephenolize light oil and phenol wastewater two kinds stream
Body is sufficiently disperseed and is mixed.By two kinds of fluid dispersions with mix, make the phenol in dephenolize light oil extraction phenol wastewater, de-
Phenol light oil extraction after, waste water will be reduced to 2300mg/L by 13500mg/L containing phenol concentration.Oily waste water after dephenolize is delivered to
Oil water separator 2, carries out standing separation in oil water separator 2, and the temperature controlling range of oil water separator is (50-60) DEG C,
Use this temperature controlling range be in view of, when reaction temperature is at (50-60) DEG C, rich oil and dephenolize waste water can be made to obtain well
Separation, and do not produce emulsion, by standing separation, form rich oil and dephenolize waste water, wherein, rich oil passes through rich oil pump 3
Being extracted out by oil water separator 2 top, deliver to light oil washing column 5 lower entrances, dephenolize waste water delivers to lower road work by waste water pump 4
Sequence-gas purification Waste Water Treatment.
(2) described rich oil back extraction phenol removal process realizes process and is, naphtalene oil dephenolize device the alkaline sodium phenolate (flow sent here
4000Kg/h, free alkali 4%) send into light oil washing column 5 upper entrance, in light oil washing column 5, alkalescence phenol from top to bottom
Sodium salt and rich oil (containing phenol amount 3.2%) from bottom to top, by 1:1 volume ratio counter current contacting, by alkalescence sodium phenolate and containing phenol
Rich oil counter current contacting, makes the phenol in rich oil be removed by alkalescence sodium phenolate back extraction, thus output dephenolize light oil and neutral phenol sodium salt,
Wherein, the dephenolize light oil (containing phenol amount 1.4%) of light oil washing column 5 top output deliver to cooler 6 by light oil circulating pump 7,
In cooler 6, dephenolize light oil is cooled to (50-60 DEG C) by (60-70) DEG C, by light for dephenolize oil cooled purpose be in view of,
In light oil washing column, phenol and alkali reaction meeting exotherm, cool down later dephenolize light oil and deliver to static mixer 1, as phenol essence
The extractant of phenol wastewater dephenolize processed, is achieved in the recycling of dephenolize light oil.Neutrality by light oil washing column 5 bottom output
Sodium phenolate (free alkali less than 2%) delivers to next procedure-phenol salt de device.What light oil washing column 5 bottom was sent into is steamed by tar
The supplementary light oil of distillation unit, its composition is similar to rich oil, for the rich oil amount of balanced recycle reaction；Light oil circulating pump 7 is delivered to down
The dephenolize light oil of procedure-benzol hydro refining unit is the dephenolize light oil amount for balancing weighing apparatus circular response.
Embodiment 2
The dephenolization method of the phenol wastewater that the phenol treating that the present invention provides produces, including static mixer 1, described static mixer 1
It is connected with oil water separator 2 by pipeline, dephenolize wastewater outlet is set in the bottom of oil water separator 2, at oil water separator 2
Top arranges oil rich outlet, and oil rich outlet is connected with light oil washing column 5, between oil rich outlet and light oil washing column 5 by pipeline
Pipeline on rich oil pump 3 is set, the top of light oil washing column 5 is connected with cooler 6 by light oil circulating pump 7, cooler 6 again with
Described static mixer 1 connects, and arranges the outlet of neutral phenol sodium salt in the bottom of light oil washing column 5；Dephenolize wastewater outlet passes through pipeline
It is connected with waste water pump 4.
The dephenolization method of the phenol wastewater that a kind of phenol treating produces, comprises the steps:
(1) described phenol treating phenol wastewater extracting and dephenolizing operation realizes process is that the phenol treating sent here by phenol treating operation contains phenol
The dephenolize that waste water (water yield 3500kg/h, containing phenol concentration 16500mg/L, oil concentration 4300mg/L) is sent here with cooler 6
Light oil (containing phenol amount 2.0%), by 2:1 volume ratio, after converging at 8, delivers to static mixer 1 on the left of static mixer 1,
In static mixer 1, by means of the rotary mixed cell of static mixer 1, make dephenolize light oil and phenol wastewater two kinds stream
Body is sufficiently disperseed and is mixed.By two kinds of fluid dispersions with mix, make the phenol in dephenolize light oil extraction phenol wastewater, de-
Phenol light oil extraction after, waste water will be reduced to 2300mg/L by 16500mg/L containing phenol concentration.Oily waste water after dephenolize is delivered to
Oil water separator 2, carries out standing separation in oil water separator 2, and the temperature controlling range of oil water separator is (50-60) DEG C,
Use this temperature controlling range be in view of, when reaction temperature is at (50-60) DEG C, rich oil and dephenolize waste water can be made to obtain well
Separation, and do not produce emulsion, by standing separation, form rich oil and dephenolize waste water, wherein, rich oil passes through rich oil pump 3
Being extracted out by oil water separator 2 top, deliver to light oil washing column 5 lower entrances, dephenolize waste water delivers to lower road work by waste water pump 4
Sequence-gas purification Waste Water Treatment.
(2) described rich oil back extraction phenol removal process realizes process and is, naphtalene oil dephenolize device the alkaline sodium phenolate (flow sent here
4200Kg/h, free alkali 3%) send into light oil washing column 5 upper entrance, in light oil washing column 5, alkalescence phenol from top to bottom
Sodium salt and rich oil (containing phenol amount 3.2%) from bottom to top, by 1.5:1 volume ratio counter current contacting, by alkalescence sodium phenolate with contain
Phenol rich oil counter current contacting, makes the phenol in rich oil be removed by alkalescence sodium phenolate back extraction, thus output dephenolize light oil and neutral phenol sodium salt,
Wherein, the dephenolize light oil (containing phenol amount 1.4%) of light oil washing column 5 top output deliver to cooler 6 by light oil circulating pump 7,
In cooler 6, dephenolize light oil is cooled to (50-60 DEG C) by (60-70) DEG C, by light for dephenolize oil cooled purpose be in view of,
In light oil washing column, phenol and alkali reaction meeting exotherm, cool down later dephenolize light oil and deliver to static mixer 1, as phenol essence
The extractant of phenol wastewater dephenolize processed, is achieved in the recycling of dephenolize light oil.Neutrality by light oil washing column 5 bottom output
Sodium phenolate (free alkali less than 2%) delivers to next procedure-phenol salt de device.What light oil washing column 5 bottom was sent into is steamed by tar
The supplementary light oil of distillation unit, its composition is similar to rich oil, for the rich oil amount of balanced recycle reaction；Light oil circulating pump 7 is delivered to down
The dephenolize light oil of procedure-benzol hydro refining unit is the dephenolize light oil amount for balancing weighing apparatus circular response.
It is de-that the present invention utilizes the dephenolize light oil of fraction dephenolizing device light oil washing column that phenol treating high-concentration phenolic wastewater carries out extraction
Phenol, the rich oil after extraction returns again to light oil washing column, utilizes the free alkali in alkalescence sodium phenolate, the phenol in rich oil is carried out back extraction
Taking to reclaim sodium phenolate, the oil-poor of generation send extraction cells to recycle, and has equipment investment expense low, without supplementary product onsumption, useless
Water dephenolize extractant cyclic utilization rate is high, removing phenol in waste water oil removal rate is high, and is favorably improved the advantages such as sodium phenolate quality, can be extensive
It is applied to the process of coking high-concentration phenolic wastewater.
Claims (10)
1. the dephenolization method of the phenol wastewater of a phenol treating generation, it is characterised in that comprise the steps:
(1) the phenol wastewater extracting and dephenolizing that phenol treating produces:
Phenol treating phenol wastewater and dephenolize light oil are mixed into static mixer, make two kinds of fluids be sufficiently mixed, enter back into profit and divide
From device, stand, form rich oil and dephenolize waste water, described in the dephenolize waste water that obtains export under oil water separator and enters gas purification
Waste Water Treatment；
(2) rich oil back extraction dephenolize:
The rich oil obtained by step (1) is extracted out from the top of described oil water separator, through the lower entrances entrance of light oil washing column
Light oil washing column；
The alkaline sodium phenolate sent here by naphtalene oil dephenolize device, through the upper entrance entrance light oil washing column of light oil washing column；
In light oil washing column, the most described alkalescence sodium phenolate and described rich oil counter current contacting from bottom to top, make in rich oil
Phenol removed by alkalescence sodium phenolate back extraction, obtain dephenolize light oil and neutral phenol sodium salt, described dephenolize light oil enters step (1)
Described in static mixer, be circulated utilization；Described neutral phenol sodium salt enters the phenol salt de device of next procedure.
The dephenolization method of the phenol wastewater that phenol treating produces the most according to claim 1, it is characterised in that in described step
(1) standing separation in oil water separator in, the temperature of oil water separator is 50-60 DEG C.
The dephenolization method of the phenol wastewater that phenol treating produces the most according to claim 1, it is characterised in that in described step
(2) the dephenolize light oil obtained in through subcooler laggard enter static mixer.
The dephenolization method of the phenol wastewater that phenol treating produces the most according to claim 1, it is characterised in that described phenol treating
Phenol wastewater contains phenol concentration 10000～20000mg/L, oil concentration from phenol treating operation, described phenol treating phenol wastewater
3000～5000mg/L.
The dephenolization method of the phenol wastewater that phenol treating produces the most according to claim 1, it is characterised in that described phenol treating
Phenol wastewater inflow 3000～5000kg/h.
The dephenolization method of the phenol wastewater that phenol treating produces the most according to claim 1, it is characterised in that in described step
(1) phenol treating phenol wastewater described in enters static mixer with dephenolize light oil 1:1～3:1 by volume.
The dephenolization method of the phenol wastewater that phenol treating produces the most according to claim 1, it is characterised in that in described step
(2) free alkali 2～4% of neutral and alkali sodium phenolate.
The dephenolization method of the phenol wastewater that phenol treating produces the most according to claim 1, it is characterised in that in described step
(2) in light oil washing column, alkalescence sodium phenolate and rich oil 1:1～2:1 by volume.
9. apply a device for the dephenolization method of the phenol wastewater of phenol treating generation, its feature described in any one of claim 1-8
Being, described dephenolize device includes static mixer (1), and described static mixer (1) is by pipeline and oil water separator (2)
Connect, dephenolize wastewater outlet is set in the bottom of described oil water separator (2), sets on the top of described oil water separator (2)
Putting oil rich outlet, described oil rich outlet is connected with light oil washing column (5) by pipeline, cleans with light oil at described oil rich outlet
Arranging rich oil pump (3) on pipeline between tower (5), light oil circulating pump (7) is passed through at the top of described light oil washing column (5)
Being connected with cooler (6), described cooler (6) is connected with described static mixer (1) again, at described light oil washing column
(5) bottom arranges the outlet of neutral phenol sodium salt.
The dephenolize device of the phenol wastewater that phenol treating produces the most according to claim 9, it is characterised in that described dephenolize is given up
Water out is connected with waste water pump (4) by pipeline.
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| CN201510388213.0A CN106315891B (en) | 2015-07-03 | 2015-07-03 | Dephenolizing method and dephenolizing device for phenol-containing wastewater generated in phenol refining |
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| CN201510388213.0A CN106315891B (en) | 2015-07-03 | 2015-07-03 | Dephenolizing method and dephenolizing device for phenol-containing wastewater generated in phenol refining |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114249634A (en) * | 2020-09-24 | 2022-03-29 | 宝武炭材料科技有限公司 | Phenol refining method for low-phenol-content wastewater discharge |
| CN115196810A (en) * | 2022-08-16 | 2022-10-18 | 华电水务工程有限公司 | Method for extracting and dephenolizing phenolic wastewater |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6113790A (en) * | 1998-12-18 | 2000-09-05 | Basf Corporation | Process for removing water-soluble organics from waste streams |
| CN105418382A (en) * | 2014-09-22 | 2016-03-23 | 上海宝钢化工有限公司 | Purification device and purification method for sodium phenolate containing neutral oil |
-
2015
- 2015-07-03 CN CN201510388213.0A patent/CN106315891B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6113790A (en) * | 1998-12-18 | 2000-09-05 | Basf Corporation | Process for removing water-soluble organics from waste streams |
| CN105418382A (en) * | 2014-09-22 | 2016-03-23 | 上海宝钢化工有限公司 | Purification device and purification method for sodium phenolate containing neutral oil |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114249634A (en) * | 2020-09-24 | 2022-03-29 | 宝武炭材料科技有限公司 | Phenol refining method for low-phenol-content wastewater discharge |
| CN115196810A (en) * | 2022-08-16 | 2022-10-18 | 华电水务工程有限公司 | Method for extracting and dephenolizing phenolic wastewater |
| CN115196810B (en) * | 2022-08-16 | 2024-02-13 | 华电水务工程有限公司 | Method for extracting and dephenolizing phenol-containing wastewater |
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| CN106315891B (en) | 2019-07-16 |
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