CN105712298A - Method for extracting bromine from bromine-containing solution - Google Patents
Method for extracting bromine from bromine-containing solution Download PDFInfo
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- CN105712298A CN105712298A CN201610293377.XA CN201610293377A CN105712298A CN 105712298 A CN105712298 A CN 105712298A CN 201610293377 A CN201610293377 A CN 201610293377A CN 105712298 A CN105712298 A CN 105712298A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B7/00—Halogens; Halogen acids
- C01B7/09—Bromine; Hydrogen bromide
- C01B7/096—Bromine
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Abstract
The invention discloses a method for extracting bromine from a bromine-containing solution. The method comprises the following steps: 1) acidifying the bromine-containing solution, and oxidizing; 2) carrying out extraction operation on the oxidized mixed solution in the step 1); 3) carrying out back extraction operation on the bromine-containing extraction organic phase obtained in the step 2); and 4) acidifying the back extraction solution obtained in the step 3) to precipitate bromine, thereby obtaining the simple substance bromine. By adopting the oxidization-extraction process, the method has the advantages of high extraction rate, simple equipment, low energy consumption and the like; the bromine extraction rate reaches 98% or above; and the extractant can be recovered.
Description
Technical field
The present invention relates to extract the environmental protective chemical industry technical field of bromine.More particularly, to one from brominated molten
The method extracting bromine in liquid.
Background technology
Bromine is the grand strategy chemicals involved the interests of the state and the people, and the Major Members as halogen is being changed
Learn in modification and organic synthesis and play irreplaceable effect.Bromine is not only widely used in new material, state
Its people such as anti-space flight, oil exploitation, flame-retarding fire-extinguishing, sterilizing, energy-conserving and environment-protective, medicine pesticide dyestuff
The manufacture of the brominated chemicals in economic field.By introducing bromo element, material is carried out function modified or impartingization
Some particular characteristic of product, it is often more important that the technique that bromine manufactures in new material synthesis and organic chemicals
Huge and the irreplaceable effect that innovation and alternative aspect are played.Preparation method mainly has steam at present
The way of distillation, Air blowing method, solvent extraction, gaseous state embrane method and absorption method etc., and really realize industry
Only steam distillation and Air blowing enrichment that metaplasia is produced combine steam distillation, and other is relatively new
The bromine technology that carries of type only rests on research and development and pilot scale stage.
CN104229738A discloses " a kind of vacuum distillation method extracts the method for bromine from sea water ", bag
Include the heating of brominated strong brine, distillation, chlorine addition hypergravity tower, the separation of bromine and the recovery profit of waste gas
Use step.By saliferous mass concentration be 20～21% brominated strong brine heat, temperature controls
75-85 DEG C, using hypergravity distillation column to distill, vapo(u)rizing temperature controls at 88-92 DEG C, containing bromine
Element, residual chlorine steam through cooling heat exchanger and separator, isolate thick bromine, wait to make into
Product, exhaust gas recirculation utilizes.Use this process, carry bromine efficiency height, extract bromine purity height, energy
Consume low, safety and environmental protection.Also some other impurity can be carried secretly, to subsequent technique during Air blowing bromine
Make troubles；Air blowing method is high to the requirement of equipment, such as use and the maintenance etc. of desorber.
CN103754823A discloses " a kind of coupling of reaction and extraction for extracting bromine simple substance or elemental iodine
Method ", the method belongs to a kind of for extracting the anti-of bromine simple substance or elemental iodine of technical field of chemistry and chemical engineering
Should extract coupling process, the specific implementation process of the method is: first oxidant chlorine is dissolved in alkane or
In halogenated alkane extractant, then by dissolved with the extractant of chlorine and bromine ion-containing or the aqueous solution of iodide ion
Mixing, fully carry out the oxidation reaction of bromine, iodide ion, eventually passing is separated obtains rich in bromine list
The extraction solution of matter or elemental iodine.The feature of the method is by bromine, the oxidation reaction of iodide ion and bromine, iodine
The abstraction technique of simple substance is coupled, and reduces operating process, reduces process energy consumption, it is possible to obtain high concentration
Bromine, iodine organic solution are easy to follow-up separation and utilization, industrial can be applicable to from through concentration sea water,
Salt lake bittern or the raw material of industry brominated, I extract bromine, I in waste water.
CN104276543A discloses " concentrated seawater puies forward bromine new technology " and the invention provides a kind of concentrated seawater
Put forward bromine new technology, specifically utilize the bromo element in concentrated seawater, combine through set of device equipment, by sea
In water, institute is brominated extracts.Its technique includes acidifying, oxidation, Air blowing, absorption and secondary oxygen
Change, distill five basic procedures.The present invention uses aeroseal to circulate, and produced tail gas and waste liquid lead to
Cross blood circulation to reclaim, return desorbing blowout operation, recycled, improve the extraction ratio of bromine.
During once oxidation, main equipment uses circular configuration, utilizes once oxidation accelerator, improves oxygen
Change degree, this device structure is the most convenient to operate, can save the operation energy simultaneously.Compare with Traditional Method,
The brominated amount of absorbing liquid high 30%～40%, power consumption low 35%～40% in technical process, bromine purity is high, extracts
Rate is high.
CN101045529A discloses " utilizing concentrated seawater to produce the process of bromine " present invention and provides
A kind of process utilizing concentrated seawater to produce bromine, utilizes concentrated seawater Air blowing sulfur dioxide to absorb tail
Sealing gland closed loop Bromine technology, uses Air blowing, and sulfur dioxide absorbs, stern seal closed loop
Produce the process of bromine.Include acidifying, oxidation, Air blowing, absorb, distill five steps
Suddenly.The effect of the present invention is to use enrichment and separating technology that enrichment cost is greatly lowered, and makes resource be able to
Make full use of, improve resource utilization, reduce the loss of chemical resource, and this technique is taked totally-enclosed
Operation, it is to avoid the problem of environmental pollution that open type production technology is brought.Meanwhile, process equipment uses glass
Glass steel matter processes, and enhances the resistance to corrosion of equipment, solves equipment corrosion in production serious
Problem.This technique can also be raw material with the concentrated seawater after desalinization, extracts bromine equally.
The CN101045529 present invention provides a kind of process utilizing concentrated seawater to produce bromine, utilizes
Concentrated seawater Air blowing, sulfur dioxide absorbs stern seal closed loop Bromine technology, uses air to blow
Going out, sulfur dioxide absorbs, and stern seal closed loop produces the process of bromine.Include acidifying, oxygen
Change, Air blowing, absorb, distill five steps.The effect of the present invention is to use enrichment and separating technology
Enrichment cost is greatly lowered, makes resource be fully utilized, improve resource utilization, reduce chemistry money
The loss in source, and this technique takes totally-enclosed operation, it is to avoid the environment that open type production technology is brought
Pollution problem.Meanwhile, process equipment uses glass steel material to process, and enhances the anticorrosive of equipment
Ability, solves the problem that equipment corrosion in production is serious.This technique can also dense with after desalinization
Sea water is raw material, extracts bromine equally.
Summary of the invention
Technique is simple, energy consumption is low, the response rate is high and applicable work to it is an object of the present invention to provide one
Sparetime university's large-scale production from containing the method extracting bromine bromine solutions.
For reaching above-mentioned purpose, the present invention uses following technical proposals:
A kind of from containing the method extracting bromine bromine solutions, the method comprises the steps:
1) brominated solution is acidified, then aoxidizes；
2) to step 1) oxidation after mixed liquor carry out extracting operation；
3) to step 2) the brominated extraction organic facies that obtains carries out back extraction operation；
4) by step 3) acidifying of the strip liquor that obtains makes bromine separate out, and obtains simple substance bromine.
Said method, step 1) described be 60-10000mg/L containing the bromine content in bromine solutions, containing bromine solutions
For one or more in sea water, concentrated seawater and brominated subsurface brine.
Said method, step 1) described acidifying is that the pH value containing bromine solutions is adjusted to 0-5；Described acidifying
Acid used is sulphuric acid or hydrochloric acid.
Said method, step 1) oxidant of described oxidation is selected from for chlorine, chlorine water, sodium hypochlorite, double
One or more in oxygen water and sodium chlorate, during wherein the consumption of chlorine is solution 0.8～5 times of bromine quality；
Chlorine water is with chloridometer, and its chlorine consumption is 0.8～5 times of bromine quality in solution；Sodium hypochlorite, dioxygen
0.2-5 times of the concentration of water or amount that sodium chlorate consumption is bromide ion material, i.e. sodium hypochlorite, hydrogen peroxide or
The addition of sodium chlorate makes containing the substance withdrawl syndrome of sodium hypochlorite, hydrogen peroxide or sodium chlorate in bromine solutions
0.2-5 times of concentration for the amount of bromide ion material.
Said method, step 2) extractant of described extracting operation is selected from mineral oil, halogenated hydrocarbons, halo virtue
One or more in hydrocarbon and inertia silicone oil.
Said method, step 2) described extracting operation is in a ratio of 1:100-100:1's by organic facies and aqueous phase
Ratio adds extractant.
Said method, step 2) described extracting operation is counter-current extraction, cross current solvent extraction or fractional extraction；Institute
The extraction process stating extracting operation completes in extraction tank, extraction tower or centrifugal extractor；Described adverse current extracts
The temperature of extract operation is 10-90 DEG C, and rotating speed is that 50-1000 turns/min, and mixing time is 0-120min.
Said method, step 3) strippant of described back extraction operation is sodium hydroxide solution, described hydrogen
The mass percent concentration of sodium hydroxide solution is 1.5-40%；Back extraction disappears to the color of organic facies.
Said method, step 3) described in the temperature of back extraction operation be 10-90 DEG C, being in a ratio of of back extraction
200:1-1:200, described back extraction uses cross-flow back extraction or countercurrent reextraction to take mode；Described cross-flow back extraction
The number of times taken is 5-10 time, and the mixing speed of cross-flow back extraction is that 50-1000 turns/min, cross-flow back extraction
Time be 0-120min；The mixing speed that countercurrent reextraction takes is that 50-1000 turns/min, and countercurrent reextraction takes
Time is 0-120min, and back extraction progression is 1 grade to 10 grades.
Said method, in step 4) after also include organic facies regeneration step: regeneration organic facies is to compare
10:1-1:10, after 1-10 level is washed, the pH value of aqueous solution is 7-10, and organic facies is reusable.
Beneficial effects of the present invention is as follows:
The present invention uses oxidation-extraction technique, uses organic extractant that free bromine is extracted to organic facies from aqueous phase,
Reaching the purpose of enrichment, extraction process only has a small amount of impurity to carry secretly；And this process equipment is simple, energy consumption
The response rate low, bromine is high, is suitable for industrial mass production；The extraction yield of the bromine of described extracting operation is
90-99%.
Detailed description of the invention
In order to be illustrated more clearly that the present invention, below in conjunction with preferred embodiment, the present invention is done further
Bright.It will be appreciated by those skilled in the art that following specifically described content is illustrative rather than limiting
Property, should not limit the scope of the invention with this.
Embodiment 1
A kind of from containing the method extracting bromine bromine solutions, described is sea water containing bromine solutions, and wherein bromine content is 63
mg/L；Take 1L sea water, regulate its pH to 1.0 with the technical hydrochloric acid of 30wt%, put into 0.2g wherein
Saturated chlorine water, aoxidizes 10min；Then in reactant liquor, 1L mineral oil is added by comparing 1:1, at 30 DEG C,
Mixing speed is 400 turns/min, extraction time 30min, and one-level extraction yield is 82.3% after testing；Xiang get
The brominated extract that arrives adds 10mL 15wt% sodium hydroxide solution, then 30 DEG C, mixing speed be
Carrying out back extraction operation, back extraction 20min under conditions of 400 turns/min, back extraction mode is cross-flow back extraction, instead
Extraction number of times is 3 times, and the aubergine of back extraction to organic facies disappears；Organic facies after back extraction is at normal temperatures with 10:1
Compare, through 2 grades washing after organic facies can reuse.Strip liquor is acidified, and regulates strip liquor pH
Being 2, separate out bromine, distillation obtains bromine 49mg, and yield is 77%.
Embodiment 2
A kind of from containing the method extracting bromine bromine solutions, described is subsurface brine containing bromine solutions, bromine in this solution
Content is 208mg/L, regulates its pH to 1.0 with the technical hydrochloric acid of 30wt%, takes this solution of 1L, Xiang Qi
In be passed through 0.5g chlorine, aoxidize 20min；Then by compare 1:1 use centrifugal extractor carry out adverse current 5
Level extraction, extraction temperature to 40 DEG C, centrifugal extractor rotating speed is 800 turns/min, material in centrifugal extractor
The time of staying is 0.20min, and total extraction yield is 97.6% after testing；Add to the brominated extract obtained
10mL 20wt% sodium hydroxide solution, then 40 DEG C, mixing speed be 300 turns/min under conditions of enter
Row back extraction operates, and back extraction 15min, back extraction mode is countercurrent reextraction, and back extraction progression is 5 times, and back extraction is extremely
The aubergine of organic facies disappears；Organic facies after back extraction comparing with 12:1 at normal temperatures, through 3 grades of water
Washing rear organic facies can reuse, strip liquor is acidified, and regulation strip liquor pH is 1, separates out bromine, distillation
Obtaining thick bromine 200.0mg, bromine yield is 96.15%.
Embodiment 3
A kind of from containing the method extracting bromine bromine solutions, described is concentrated seawater containing bromine solutions, bromine in this solution
Content is 867mg/L, regulates its pH to 0.5 with the technical hydrochloric acid of 40wt%, takes this solution of 1L, to
Wherein adding 600ml concentration is 1mol/L liquor natrii hypochloritis, aoxidizes 0.5 hour；Then by comparing 1:2
In reactant liquor, add 333mL mineral oil, be heated to 45 DEG C, with mixing speed for 300 in extraction tank
Turning/min, mixing time 10min, the extraction yield of six stage countercurrent extractions is 98.2%；To the brominated extraction obtained
Take in liquid addition 15mL 18wt% sodium hydroxide solution, then 45 DEG C, mixing speed be 500 turns/min
Under conditions of carry out back extraction operation, back extraction 15min, back extraction mode is cross-flow back extraction, and back extraction number of times is 5
Secondary, the aubergine of back extraction to organic facies disappears；Organic facies after back extraction comparing with 13:1 at normal temperatures,
After 3 grades of washings, organic facies can reuse, and strip liquor is acidified, and regulation strip liquor pH is 2, analysis
Going out bromine, distillation obtains thick bromine 834.4mg, and bromine yield is 96.24%.
Embodiment 4
A kind of from containing the method extracting bromine bromine solutions, described is bromination reaction waste liquid containing bromine solutions, this raw material
The brominated amount of liquid is 2070mg/L, regulates its pH to 0.5 with the industrial sulphuric acid of 92.5wt%, and this is former to take 1L
Feed liquid, and it is added thereto to 30wt% hydrogen peroxide 2.0mL, aoxidize 0.5 hour；Then by compare 1:1 to
Reactant liquor adds 1L mineral oil, is heated to 35 DEG C, be 350 turns/min with mixing speed in extraction tower,
Residence time of material 20min, extraction yield is 98.6%；15mL is added in the brominated extract obtained
15wt% sodium hydroxide solution, then 40 DEG C, mixing speed be that the condition of 350 turns/min carries out back extraction
Operation, back extraction 20min, back extraction mode is cross-flow back extraction, and back extraction number of times is 6 times, and back extraction is to organic facies
Aubergine disappears；Organic facies after back extraction comparing with 15:1 at normal temperatures, organic after 4 grades of washings
Can reuse mutually.It is 2 precipitation bromines that strip liquor is acidified to pH, and distillation obtains thick bromine 2000.0mg, bromine
Yield is 96.62%.
Embodiment 5
A kind of from containing the method extracting bromine bromine solutions, described is bromination reaction waste liquid containing bromine solutions, this raw material
The brominated amount of liquid is 2070mg/L, regulates its pH to 0.5 with the industrial sulphuric acid of 98wt%, takes this raw material of 1L
Liquid, and it is added thereto to 0.3g sodium chlorate, aoxidize 0.5 hour；Then by comparing 1:2 250mL ore deposit
Thing oil carries out six grades of cross current solvent extractions in extraction tank, is heated to 45 DEG C, and mixing speed is 250 turns/min, extraction
Taking time 40min, total extraction yield is 99.4%；10mL 30wt% is added in the brominated extract obtained
Sodium hydroxide solution, then 45 DEG C, mixing speed be 500 turns/min under conditions of carry out back extraction operation,
Back extraction 15min, back extraction mode is cross-flow back extraction, and back extraction number of times is 5 times, the aubergine of back extraction to organic facies
Disappear；Organic facies after back extraction comparing with 15:1 at normal temperatures, after 3 grades of washings, organic facies can weigh
Multiple utilization.It is 2 precipitation bromines that strip liquor is acidified to pH, and distillation obtains thick bromine 2016.4mg, and bromine yield is
97.41%.
Embodiment 6
A kind of from containing the method extracting bromine bromine solutions, described is concentrated seawater containing bromine solutions, and this material liquid contains
Bromine amount is 867mg/L, regulates its pH to 2.0 with the technical hydrochloric acid of 30wt%, takes this material liquid of 1L, and
It is added thereto to the saturated chlorine water of 200ml, aoxidizes 40min；Then in reactant liquor, 1L is added by comparing 1:1
Sulfonated kerosene, is heated to 50 DEG C, is 300 turns/min with mixing speed in extraction tower, time of staying 30min,
Extraction yield is 97.7% after testing；Brominated extract uses 15wt% sodium hydroxide solution to be in a ratio of 10 to 1
In extraction tower, carry out back extraction, then 50 DEG C, mixing speed be 450 turns/min under conditions of carry out
Back extraction operates, time of staying 25min, and the aubergine of back extraction to organic facies disappears；Organic facies after back extraction exists
Comparing with 13:1 under room temperature, after 3 grades of washings, organic facies can reuse.Strip liquor is acidified to
PH is 1 precipitation bromine, and distillation obtains thick bromine 830.1mg, and bromine yield is 95.74%.
Embodiment 7
A kind of from containing the method extracting bromine bromine solutions, described is subsurface brine containing bromine solutions, and this material liquid contains
Bromine amount is 196mg/L, regulates its pH to 2.5 with the industrial sulphuric acid of 40wt%, takes this material liquid of 1L, and
It is added thereto to 30wt% hydrogen peroxide 100.0mL, aoxidizes 1 hour；Then by comparing 1:2 in reactant liquor
Adding 500mL dichloroethanes, be heated to 45 DEG C, mixing speed is 450 turns/min, extraction time 30min,
One-level extraction yield is 85.6% after testing；10mL 30wt% hydroxide is added in the brominated extract obtained
Sodium solution, then 45 DEG C, mixing speed be 550 turns/min under conditions of carry out back extraction operation, back extraction
30min, back extraction mode is cross-flow back extraction, and back extraction number of times is 5 times, and the aubergine of back extraction to organic facies disappears；
Organic facies after back extraction comparing with 13:1 at normal temperatures, after 2 grades of washings, organic facies can reuse,
It is 2 precipitation bromines that strip liquor is acidified to pH, and distillation obtains thick bromine 164.4mg, and bromine yield is 83.88%.
Embodiment 8
A kind of from containing the method extracting bromine bromine solutions, described is subsurface brine containing bromine solutions, and this material liquid contains
Bromine amount is 196mg/L, regulates its pH to 0.5 with the technical hydrochloric acid of 30wt%, takes this material liquid of 1L, and
It is added thereto to 0.45g sodium hypochlorite, aoxidizes 1 hour；Then in reactant liquor, 1L is added by comparing 1:1
Carbon tetrachloride, is heated to 45 DEG C, and mixing speed is 500 turns/min, extraction time 30min, and after testing one
Level extraction yield is 87.5%；15mL 15wt% sodium hydroxide solution is added in the brominated extract obtained,
Then 45 DEG C, mixing speed be 500 turns/min under conditions of carry out back extraction operation, back extraction 20min, instead
Extraction mode is countercurrent reextraction, and back extraction number of times is 8 times, and the aubergine of back extraction to organic facies disappears；After back extraction
Organic facies comparing with 15:1 at normal temperatures, after 3 grades of washings, organic facies can reuse.Strip liquor
Being acidified to pH is 3 precipitation bromines, and distillation obtains thick bromine 167mg, yield 85.0%.
Embodiment 9
A kind of from containing the method extracting bromine bromine solutions, described is brominated subsurface brine containing bromine solutions, this raw material
The brominated amount of liquid is 208mg/L, regulates its pH to 1.5 with the industrial sulphuric acid of 30wt%, takes this material liquid of 1L,
And it is passed through 0.5g chlorine wherein, aoxidize 30min；Then by comparing 1:2 inertia silicone oil at 40 DEG C, use
Carrying out fractional extraction in centrifugal extractor, extraction progression is 6 grades, and washing progression is 3 grades, and countercurrent reextraction takes
Progression is 5 grades.Strip liquor is 20wt% sodium hydroxide solution, and back extraction is in a ratio of 50 to 1.Detergent is anti-
Extraction temperature 40 DEG C.Washing is in a ratio of 60 to 1.Back extraction disappears to the aubergine of organic facies；Having after back extraction
Machine comparing with 12:1 the most at normal temperatures, after 3 grades of washings, organic facies can reuse.Strip liquor acid
Changing, regulation strip liquor pH is 2 precipitation bromines, and sucking filtration obtains thick bromine 199.68mg, yield 96%.
Obviously, the above embodiment of the present invention is only for clearly demonstrating example of the present invention, and
It is not the restriction to embodiments of the present invention, for those of ordinary skill in the field,
Can also make other changes in different forms on the basis of described above, here cannot be to all
Embodiment give exhaustive, every belong to the obvious change that technical scheme extended out
Change or change the row still in protection scope of the present invention.
Claims (10)
1. one kind from containing the method extracting bromine bromine solutions, it is characterised in that the method comprises the steps:
1) brominated solution is acidified, then aoxidizes；
2) to step 1) oxidation after mixed liquor carry out extracting operation；
3) to step 2) the brominated extraction organic facies that obtains carries out back extraction operation；
4) by step 3) acidifying of the strip liquor that obtains makes bromine separate out, and obtains simple substance bromine.
Method the most according to claim 1, it is characterised in that: step 1) described containing in bromine solutions
Bromine content is 60-10000mg/L, is in sea water, concentrated seawater and brominated subsurface brine containing bromine solutions
Plant or multiple.
Method the most according to claim 1, it is characterised in that: step 1) described acidifying is by brominated
The pH value of solution is adjusted to 0-5；Acid used by described acidifying is sulphuric acid or hydrochloric acid.
Method the most according to claim 1, it is characterised in that: step 1) oxidant of described oxidation
It is selected from as one or more in chlorine, chlorine water, sodium hypochlorite, hydrogen peroxide and sodium chlorate, wherein chlorine
Consumption is bromine quality in solution 0.8～5 times；Chlorine water is with chloridometer, and its chlorine consumption is in solution
0.8～5 times of bromine quality；Sodium hypochlorite, hydrogen peroxide or the concentration of amount that sodium chlorate consumption is bromide ion material
0.2-5 times, i.e. the addition of sodium hypochlorite, hydrogen peroxide or sodium chlorate make containing sodium hypochlorite in bromine solutions,
The substance withdrawl syndrome of hydrogen peroxide or sodium chlorate is 0.2-5 times of the concentration of the amount of bromide ion material.
Method the most according to claim 1, it is characterised in that: step 2) extraction of described extracting operation
Take one or more in mineral oil, halogenated hydrocarbons, halogenated aryl hydrocarbon and inertia silicone oil of agent.
Method the most according to claim 5, it is characterised in that: step 2) described extracting operation presses
Organic facies adds extractant with the ratio being in a ratio of 1:100-100:1 of aqueous phase.
Method the most according to claim 6, it is characterised in that: step 2) described extracting operation is
Counter-current extraction, cross current solvent extraction or fractional extraction；The extraction process of described extracting operation is in extraction tank, extraction
Tower or centrifugal extractor complete；The temperature of described counter-current extraction operation is 10-90 DEG C, and rotating speed is 50-1000
Turning/min, mixing time is 0-120min.
Method the most according to claim 1, it is characterised in that: step 3) described back extraction operation
Strippant is sodium hydroxide solution, and the mass percent concentration of described sodium hydroxide solution is 1.5-40%；
Back extraction disappears to the color of organic facies.
Method the most according to claim 8, it is characterised in that: step 3) described in back extraction operation
Temperature be 10-90 DEG C, back extraction be in a ratio of 200:1-1:200, described back extraction uses cross-flow back extraction
Or countercurrent reextraction takes mode；The number of times of described cross-flow back extraction is 5-10 time, the stirring speed of cross-flow back extraction
Degree turns/min for 50-1000, and the time of cross-flow back extraction is 0-120min；The mixing speed that countercurrent reextraction takes
Turning/min for 50-1000, the time that countercurrent reextraction takes is 0-120min, back extraction progression be 1 grade to 10
Level.
Method the most according to claim 1, it is characterised in that: in step 4) after also include
Machine phase regeneration step: regeneration organic facies is to compare 10:1-1:10, after 1-10 level is washed, aqueous solution
PH value is 7, and organic facies is reusable.
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| CN109081310A (en) * | 2018-10-26 | 2018-12-25 | 山东省海洋化工科学研究院 | A method of extracting bromine from brominated feed liquid or waste water |
| CN109371416A (en) * | 2018-12-12 | 2019-02-22 | 浙江大学 | A method of by brominated Sewage treatment bromine |
| CN110104612A (en) * | 2019-06-05 | 2019-08-09 | 宁波荙博爽石油化工有限公司 | A kind of bromine recovery method of the brominated waste water of acid imide |
| CN112939027A (en) * | 2021-01-28 | 2021-06-11 | 北京工业大学 | Method for recovering high-purity sodium bromide from bromine-containing crude salt |
| CN113620250A (en) * | 2020-05-08 | 2021-11-09 | 青岛海湾精细化工有限公司 | Bromine-containing waste gas recovery method |
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