CN1676461A - Method for extracting iodine from rejected material generated during production of phosphor product from iodine-containing phosphorus ore - Google Patents
Method for extracting iodine from rejected material generated during production of phosphor product from iodine-containing phosphorus ore Download PDFInfo
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Abstract
The present invention relates to a method for extracting iodine from wastes produced when the iodine-contained phosphorus ore is used for producing phosphorus product. It is characterized by that it uses the said wastes including circulating water, waste water and waste gas as raw material for extracting iodine or compound of iodine. Said invention is simple in process and low in cost.
Description
Technical field: the present invention relates to extract from contain the waste that produces when the iodine Rock Phosphate (72Min BPL) is produced phosphorus product the method for iodine, is the method for extracting iodine in the recirculated water that produces in the raw material production phosphorus product process, waste water, the waste gas to contain the iodine Rock Phosphate (72Min BPL) particularly; The field that belongs to environmental protection, chemical industry technology.
Technical background: iodine is the basic raw material of making inorganic or organic iodide, is again the essential nutritive element of human body and plant, at aspects such as medicine, agricultural, dyestuff, metallurgy, synthetic rubber, national defence and sophisticated technologies extensive use is arranged; The iodine resource mainly contains: iodine in seawater, underground bittern water, the ore; China mainly relies on and carries iodine in the seawater, the common amount of iodine of seawater only is 0.05mg/L, soak solution when sea-tangle is produced in industrial utilization is carried iodine, working ability is only for producing about 140 tons of iodine per year at present, the demand, the breach that do not satisfy market far away are very big, and price is always at 160,000 yuan～220,000 yuan/ton.Equal association has the oxide compound of iodine in the ground Rock Phosphate (72Min BPL) such as China Guizhou, Yunnan, amount of iodine is at 19～76mg/kg, but at present in carrying out the phosphorus chemical product production process, owing to there is not ready-made extractive technique, iodine is wherein all abandoned as waste, bring bigger harm to ecotope on the one hand, the iodine resource is wasted on the other hand; Therefore, extraction iodine has bigger social benefit from contain the waste that produces when the iodine Rock Phosphate (72Min BPL) is produced phosphorus product, can obtain favorable economic benefit simultaneously.
Summary of the invention: the object of the invention is: a kind of method of extracting iodine from contain the water that produced when the iodine Rock Phosphate (72Min BPL) is produced phosphorus chemical product, gas waste is provided, this method had both solved waste discharge, had caused environmental pollution problems, a kind of new system iodine raw material is provided again, waste can be turned waste into wealth, the present invention constitutes like this: the waste that produces when Rock Phosphate (72Min BPL) is produced phosphorus product, comprise: recirculated water, waste water, waste gas adopt existing chemical production technical therefrom to extract the compound of iodine or iodine as the raw material of carrying iodine.Specifically: the present invention takes and contains recirculated water, the waste water that produces when the iodine Rock Phosphate (72Min BPL) is produced phosphorus product, adds lime or FeCl down at 10～60 ℃
3, its consumption is 2～15% of a processed waste water weight, after stirring, precipitate, filtering, removes harmful waste residue, obtains to contain the iodine clear liquid, after also can staticly settling naturally, removes harmful waste residue, obtains to contain the iodine clear liquid.That takes acquisition contains the iodine clear liquid, 10～100 ℃,
Under the normal pressure, add sodium bisulfite or S-WAT in containing the iodine clear liquid, its consumption is 1～2 times of the separation and concentration theoretical requirement that contains iodine in the iodine waste water, separate out iodine, the iodine precipitation of separating out is filtered with pressure filter, obtain impure higher thick iodine, purify with subliming method, get final product the product of iodine.What the present invention can take acquisition contains the iodine clear liquid, under 10～100 ℃, normal pressure, the mixture that in containing the iodine clear liquid, adds copper sulfate and ferric sulfate, ratio is a copper sulfate: ferric sulfate=20～80: 80～20, consumption be processed contain iodine water weight 1～25% or separate 1～2 times of the theoretical requirement contain iodine in the iodine water, add yellow soda ash or salt of wormwood again, make iodine compound solution, feed chlorine at last, make iodine separate out precipitation, filtration, the refining iodine that gets product.What the present invention can also take acquisition contains the iodine clear liquid, under 10～100 ℃, normal pressure, contains the iodine clear liquid and is acidified with acid pH value 2～4, sedimentation and filtration feeds chlorine in the clean liquid, iodine is dissociated separate out, adding ion exchange resin adsorbs, add sulfurous acid or sodium hydroxide again, carry out wash-out, and then add Potcrate, or one of sulfuric acid, sodium bisulfite, S-WAT, iodine is separated out, filter and centrifugation, through refining finished product iodine.What the present invention also can take acquisition contains the iodine clear liquid, under 10～100 ℃, normal pressure, contain the iodine clear liquid and be acidified with acid pH value 2～4, sedimentation and filtration adds chlorine in the clean liquid, also can add liquid chlorine or hypochlorite, its consumption is 1～2 times of the needed theoretical amount of iodine, sends into the desorption tower cat head then, with 35～50 ℃ the air countercurrent flow of being preheated to that feeds at the bottom of the tower, the air of enrichment iodine escapes and enter the absorption tower from cat head, this, airborne iodine SO
2The aqueous solution or be dissolved with SO
2Iodine solution, also can be that the mixing acid of sulfuric acid and hydroiodic acid HI absorbs, feed chlorine then in the solution after absorbing iodine iodine separated out, or feed SO
2Make to feed chlorine again after the reduction of absorbed iodine iodine is separated out, after filtration and centrifugation, re-refine finished product iodine.For the waste gas that produces in the production process, the present invention take produce when Rock Phosphate (72Min BPL) is produced phosphorus product contain iodine waste gas, with hot water its spray irrigation is purified, the iodine waste gas that contains after the purification is introduced in the absorption tower from the bottom, uses SO
2The aqueous solution or be dissolved with SO
2Iodine solution, also can be sulfuric acid with the mixing acid ratio of sulfuric acid and hydroiodic acid HI: hydroiodic acid HI=20～80: 80～20, absorb the iodine in the waste gas, feed chlorine then in the solution after absorbing iodine iodine separated out, or feed SO
2Make to feed chlorine again after the reduction of absorbed iodine iodine is separated out, after filtration and centrifugation, refining finished product iodine.
Compared with prior art: the present invention has remedied the blank and deficiency of extracting the iodine method from contain the waste that produces when the iodine phosphorus ore is produced phosphorus product, compares with the production technology of existing iodine, and technology of the present invention is simple, Financial cost is lower; Can again for trade waste finds new application approach, turn waste into wealth on the other hand for iodine finds new raw materials for production on the one hand, environment is better protected.
Embodiments of the invention 1: get total amount 1000g yellow phosphorus factory's production cycle water or phosphoric acid factory and produce flue gas wash water or waste water, add 20g～100g lime, stir, through clarification filtration, clear liquid adds 20～150g sodium bisulfite or adds 20～150g S-WAT to be handled, can separate out iodine, the iodine precipitation of separating out is filtered with pressure filter, contains SiO in the thick iodine that obtains
2, CaSO
4Deng impurity, available subliming method purifies, and is about to thick iodine heating, be not higher than under 113.6 ℃, makes the iodine vapor condensation, promptly obtains larger particles crystalline iodine product.
Embodiments of the invention 2: get total amount 1000g yellow phosphorus factory's production cycle water or phosphoric acid factory and produce flue gas wash water or waste water, add 20～150gFeCl
3, stirring, sedimentation filtering separation, clear liquid adds 20～120g copper sulfate and 10～60g ferrum sulfuricum oxydatum solutum is handled, and gained solution is with the yellow soda ash neutralization and get CuI and Fe (OH)
3Precipitation, CuI reclaims after filtration, again CuI is become suspension. feed 1～1.6 times the chlorine that separates the required theoretical amount of iodine, in reactor, make iodine separate out precipitation, filter, the thick iodine of gained is refining with vitriol oil scorification, soon the iodine filter cake is put into melting tank, adds sulfuric acid in the pot, melts down at 120～160 ℃, flow into casting pan, crushing packing gets finished product iodine; The thick iodine of gained also can be refining with vapor distillation method, promptly with superheated vapour by thick iodine layer, make the iodine distillation, condensation is collected in below 50 ℃ in the water, crystallisation by cooling then, filter and finished product iodine.
Embodiments of the invention 3: get total amount 1000g yellow phosphorus factory's production cycle water or phosphoric acid factory and produce flue gas wash water or waste water, add 20～80g lime or FeCl3, stirring, sedimentation filtering separation, clear liquid is acidified with acid to pH value 1.5～3, feed 1～1.6 times chlorine of the needed theoretical amount of iodine, iodine is dissociated separate out, adsorb unnecessary chlorine recycling use again by ion exchange resin; Then, the iodine of absorption is with 20～100g sulfurous acid solution wash-out, with Potcrate iodine separated out again, centrifugation, slightly iodine gets finished product iodine through the sulfuric acid melt refining; Perhaps Xi Fu iodine is with 20～100g sodium hydroxide solution wash-out, after generating NaI and NalO, in reactor, use sulfuric acid acidation, make the free precipitation of iodine, filter and centrifugation, the thick iodine of gained is with vitriol oil scorification or refining with vapor distillation method, and the iodine that gets product also can will further be produced NaI and NaIO product behind the NaI that generate and the NaIO solution purification.
Embodiments of the invention 4: get total amount 1000g yellow phosphorus factory's production cycle water or phosphoric acid factory and produce flue gas wash water or waste water, add 10～100g lime or add 10～100gFeCl
3Stir, the sedimentation filtering separation, after clear liquid is acidified with acid pH to 1.5～4, feed chlorine or add liquid chlorine or hypochlorite, make the iodide ion in the feed liquid be oxidized to iodine molecule, when oxidizing potential reaches 500～600 millivolts (saturated calomel electrode), this oxidation liquid is sent into stripping tower, drench down from top, blast oneself from the stripping tower bottom and be preheated to 35～50 ℃ air, iodine is blown out, and the air of enrichment iodine is discharged from cat head and is entered the absorption tower from the bottom, and airborne iodine is sprayed the sulfurous gas aqueous solution that gets off or is dissolved with SO by tower top
2Iodine solution absorb, and be reduced, generate hydroiodic acid HI, absorption liquid is squeezed in the absorption tower with pump, circulation absorbs repeatedly, improving the concentration of contained hydrogen iodide, when absorption liquid concentration reaches when containing about 100～200 grams per liters of iodine, promptly sends into the iodine parser, feeds chlorine,
Stir, make the free precipitation of iodine; Through filter vacuum pump suction filtration, the thick iodine of gained is refining with vitriol oil scorification again, and iodine gets product.
Embodiments of the invention 5: get total amount 1000g yellow phosphorus factory's production cycle water or phosphoric acid factory and produce flue gas wash water or waste water, add 10～100g FeCl
3Flocculation agent, stir, the sedimentation filtering separation, to pH value 1.5～4, sedimentation and filtration, clean liquid feeds chlorine or adds oxygenants such as liquid chlorine or hypochlorite clear liquid with sulfuric acid acidation, and its consumption is 1～1.6 times of the needed theoretical amount of iodine, send into the desorption tower cat head then, be preheated to 35～50 ℃ air countercurrent flow with feeding oneself at the bottom of the tower, slough the solution of iodine and discharge at the bottom of tower, the air of enrichment iodine escapes and enter the absorption tower from cat head; At this, airborne iodine absorbed by the mixing acid of sulfuric acid and hydroiodic acid HI, the weight ratio of sulfuric acid and hydroiodic acid HI is 20～80: 80～20 in the mixing acid, the mixing acid that absorbs behind the iodine enters the reaction storage tank, feeds SO
2, make absorbed iodine be reduced to HI, at this moment, partially mixed acid goes to the absorption tower to recycle, and rest part is sent into mixer, and the chlorine that feeds theoretical requirement is separated out iodine; After filtration, it is refining with vitriol oil scorification to filter the thick iodine of gained, the iodine that gets product, and sulfur acid and hydrochloric acid in the filtering mother liquor return settler and are used for acidifying recirculated water or wash water clear liquid.
Embodiments of the invention 6: get and contain the iodine phosphorus ore and produce phosphoric acid, what produce in the phosphoric acid salt process contains iodine waste gas, with hot water its spray irrigation is purified, send waste water to put forward the iodine system handles washing fluid that obtains, the iodine waste gas that contains after the purification is introduced in the absorption tower from the bottom, iodine in the waste gas is sprayed the sulfurous gas aqueous solution that gets off or the iodine solution that is dissolved with sulfurous gas and is absorbed by tower top, and be reduced, generate hydroiodic acid HI, absorption liquid goes out from tower bottom flow, at this moment, part is squeezed in the absorption tower with pump, circulation absorbs repeatedly, and to improve the concentration of contained hydrogen iodide, part concentration reaches the absorption liquid that contains about 100～200 grams per liters of iodine, send into the iodine parser, feed chlorine, stir, make the free precipitation of iodine, more after filtration, the thick iodine of gained is refining with vitriol oil scorification, and iodine gets product.
Embodiments of the invention 7: get contain the iodine phosphorus ore produce produce in phosphoric acid, the phosphoric acid salt process contain iodine waste gas, after with hot water its spray irrigation being purified, send waste water to put forward the iodine system handles washing fluid that obtains, the iodine waste gas that contains after the purification is introduced in the absorption tower from the bottom, iodine in the waste gas is sprayed the sulfuric acid that gets off by tower top and the mixing acid of hydroiodic acid HI is absorbed, the weight ratio of sulfuric acid and hydroiodic acid HI is 20～80: 80～20 in the mixing acid, and the mixing acid behind the absorption iodine enters the reaction storage tank, feeds SO
2, make absorbed iodine be reduced to HI, at this moment, partially mixed acid goes to the absorption tower to recycle, and rest part is sent into mixer, and the chlorine that feeds theoretical requirement is separated out iodine, after filtration, the thick iodine of gained is made with extra care with vitriol oil scorification or with vapor distillation method, and iodine gets product.
Claims (7)
1, a kind of method of from contain the waste that produces when the iodine Rock Phosphate (72Min BPL) is produced phosphorus product, extracting iodine, it is characterized in that: the waste that produces when Rock Phosphate (72Min BPL) is produced phosphorus product, comprise: recirculated water, waste water, waste gas adopt existing chemical production technical therefrom to extract the compound of iodine or iodine as the raw material of carrying iodine.
2, according to the described method of from contain the waste that produces when the iodine Rock Phosphate (72Min BPL) is produced phosphorus product, extracting iodine of claim 1, it is characterized in that: take the recirculated water, the waste water that produce when containing iodine Rock Phosphate (72Min BPL) production phosphorus product, add lime or FeCl3 down at 10～60 ℃, its consumption is 2～15% of a processed waste water weight, after stirring, precipitate, filtering, removes harmful waste residue, acquisition contains the iodine clear liquid, after also can staticly settling naturally, remove harmful waste residue, obtain to contain the iodine clear liquid.
3, according to claim 1, the 2 described methods of from contain the waste that produces when the iodine Rock Phosphate (72Min BPL) is produced phosphorus product, extracting iodine, it is characterized in that: that takes acquisition contains the iodine clear liquid, under 10～100 ℃, normal pressure, in containing the iodine clear liquid, add sodium bisulfite or S-WAT, its consumption is 1～2 times of the separation and concentration theoretical requirement that contains iodine in the iodine waste water, separate out iodine, the iodine precipitation of separating out is filtered with pressure filter, obtains impure higher thick iodine, purify with subliming method, get final product the product of iodine.
4, according to claim 1, the 2 described methods of from contain the waste that produces when the iodine Rock Phosphate (72Min BPL) is produced phosphorus product, extracting iodine, it is characterized in that: that takes acquisition contains the iodine clear liquid, at 10～100 ℃, under the normal pressure, the mixture that in containing the iodine clear liquid, adds copper sulfate and ferric sulfate, ratio is a copper sulfate: ferric sulfate=20～80: 80～20, consumption be processed contain iodine water weight 1～25% or separate 1～2 times of the theoretical requirement contain iodine in the iodine water, add yellow soda ash or salt of wormwood again, make iodine compound solution, feed chlorine then, make iodine separate out precipitation, filter, the refining iodine that gets product.
5, according to claim 1, the 2 described methods of from contain the waste that produces when the iodine Rock Phosphate (72Min BPL) is produced phosphorus product, extracting iodine, it is characterized in that: that takes acquisition contains the iodine clear liquid, at 10～100 ℃, under the normal pressure, contain the iodine clear liquid and be acidified with acid pH value 2～4, sedimentation and filtration, feed chlorine in the clean liquid, iodine is dissociated separate out, add ion exchange resin and adsorb, add sulfurous acid or sodium hydroxide again, carry out wash-out, and then adding Potcrate, or sulfuric acid, sodium bisulfite, one of S-WAT is separated out iodine, filter and centrifugation, through refining finished product iodine.
6, according to claim 1, the 2 described methods of from contain the waste that produces when the iodine Rock Phosphate (72Min BPL) is produced phosphorus product, extracting iodine, it is characterized in that: that takes acquisition contains the iodine clear liquid, at 10～100 ℃, under the normal pressure, contain the iodine clear liquid and be acidified with acid pH value 2～4, sedimentation and filtration, add chlorine in the clean liquid, also can add liquid chlorine or hypochlorite, its consumption is 1～2 times of the needed theoretical amount of iodine, send into the desorption tower cat head then, with 35～50 ℃ the air countercurrent flow of being preheated to that feeds at the bottom of the tower, the air of enrichment iodine escapes and enter the absorption tower from cat head, at this airborne iodine SO
2The aqueous solution or be dissolved with SO
2Iodine solution, also can be that the mixing acid of sulfuric acid and hydroiodic acid HI absorbs, ratio is a copper sulfate: ferric sulfate=20～80: 80～20.Feed chlorine then in the solution after absorbing iodine iodine is separated out, or feed SO
2Make to feed chlorine again after the reduction of absorbed iodine iodine is separated out, after filtration and centrifugation, re-refine finished product iodine.
7, according to the described method of from contain the waste that produces when the iodine Rock Phosphate (72Min BPL) is produced phosphorus product, extracting iodine of claim 1, its feature is as follows: take produce when Rock Phosphate (72Min BPL) is produced phosphorus product contain iodine waste gas, with hot water its spray irrigation is purified, the iodine waste gas that contains after the purification is introduced in the absorption tower from the bottom, uses SO
2The aqueous solution or be dissolved with SO
2Iodine solution, also can absorb iodine in the waste gas with the mixing acid of sulfuric acid and hydroiodic acid HI, ratio is a sulfuric acid: hydroiodic acid HI=20～80: 80～20, feed chlorine then in the solution after absorbing iodine iodine separated out, or feed SO
2Make to feed chlorine again after the reduction of absorbed iodine iodine is separated out, after filtration and centrifugation, refining finished product iodine.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03135817 CN1284723C (en) | 2003-09-10 | 2003-09-10 | Method for extracting iodine from rejected material generated during production of phosphor product from iodine-containing phosphorus ore |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03135817 CN1284723C (en) | 2003-09-10 | 2003-09-10 | Method for extracting iodine from rejected material generated during production of phosphor product from iodine-containing phosphorus ore |
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| CN1676461A true CN1676461A (en) | 2005-10-05 |
| CN1284723C CN1284723C (en) | 2006-11-15 |
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Cited By (14)
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| CN101318626B (en) * | 2008-07-10 | 2010-06-09 | 贵州大学 | Apparatus for recycling iodine from diluted phosphoric acid for phosphoric acid manufacture with wet-process |
| CN101830443A (en) * | 2010-04-14 | 2010-09-15 | 清华大学 | Process for purifying sulfuric acid phase and hydriodic acid phase in iodine-sulfur cycle |
| CN101041422B (en) * | 2007-04-19 | 2011-01-26 | 瓮福（集团）有限责任公司 | Method for extracting iodine from iodine enriched solution |
| CN101468791B (en) * | 2007-12-29 | 2011-06-22 | 中国核动力研究设计院 | Extraction and purification technique for producing iodine-131 using homogeneous solution-type reactor |
| CN102730642A (en) * | 2012-06-29 | 2012-10-17 | 贵州开磷（集团）有限责任公司 | Gas-liquid mixed extraction iodine recovery technology |
| CN102910588A (en) * | 2012-04-19 | 2013-02-06 | 贵州开磷（集团）有限责任公司 | Gas-liquid mixed extraction integrated iodine recovery device |
| CN103224220A (en) * | 2013-05-09 | 2013-07-31 | 四川西艾氟科技有限公司 | Method for recovering iodine from perfluoroalkylethyl acrylate synthesis byproduct |
| CN105110296A (en) * | 2015-07-21 | 2015-12-02 | 安徽六国化工股份有限公司 | Method used for preparing iodine via recovery of phosphorus ore associated high valence iodine in wet phosphoric acid production |
| CN105129820A (en) * | 2015-07-21 | 2015-12-09 | 安徽六国化工股份有限公司 | Method of recycling phosphorite-associated high-valence iodine from wet-method phosphoric acid production to prepare iodized salt |
| CN105217574A (en) * | 2015-09-21 | 2016-01-06 | 贵州鑫新化工集团有限公司 | A kind ofly reclaim the method for iodine and the cooling tower of device and employing in phosphorus production first step cooling tower water coolant |
| CN105217573A (en) * | 2015-09-21 | 2016-01-06 | 贵州鑫新化工集团有限公司 | A kind of method utilizing yellow phosphoric tail gas to prepare glycol recovery iodine |
| CN105271123A (en) * | 2015-09-21 | 2016-01-27 | 贵州鑫新化工集团有限公司 | Method and apparatus for recovering iodine in yellow phosphorus production first stage cooling tower cooling water |
| CN109847565A (en) * | 2019-03-22 | 2019-06-07 | 中科京投环境科技江苏有限公司 | A kind of mercury recyclable device of mercurous exhaust gas |
| CN113526772A (en) * | 2021-09-02 | 2021-10-22 | 常州睿典材料科技有限公司 | Method for recycling solid iodine in iodine-containing wastewater by steam iodine extraction method |
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2003
- 2003-09-10 CN CN 03135817 patent/CN1284723C/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101041422B (en) * | 2007-04-19 | 2011-01-26 | 瓮福（集团）有限责任公司 | Method for extracting iodine from iodine enriched solution |
| CN101468791B (en) * | 2007-12-29 | 2011-06-22 | 中国核动力研究设计院 | Extraction and purification technique for producing iodine-131 using homogeneous solution-type reactor |
| CN101318626B (en) * | 2008-07-10 | 2010-06-09 | 贵州大学 | Apparatus for recycling iodine from diluted phosphoric acid for phosphoric acid manufacture with wet-process |
| CN101830443A (en) * | 2010-04-14 | 2010-09-15 | 清华大学 | Process for purifying sulfuric acid phase and hydriodic acid phase in iodine-sulfur cycle |
| CN101830443B (en) * | 2010-04-14 | 2011-06-15 | 清华大学 | Process for purifying sulfuric acid phase and hydriodic acid phase in iodine-sulfur cycle |
| CN102910588A (en) * | 2012-04-19 | 2013-02-06 | 贵州开磷（集团）有限责任公司 | Gas-liquid mixed extraction integrated iodine recovery device |
| CN102730642A (en) * | 2012-06-29 | 2012-10-17 | 贵州开磷（集团）有限责任公司 | Gas-liquid mixed extraction iodine recovery technology |
| CN103224220B (en) * | 2013-05-09 | 2014-12-03 | 四川西艾氟科技有限公司 | Method for recovering iodine from perfluoroalkylethyl acrylate synthesis byproduct |
| CN103224220A (en) * | 2013-05-09 | 2013-07-31 | 四川西艾氟科技有限公司 | Method for recovering iodine from perfluoroalkylethyl acrylate synthesis byproduct |
| CN105110296A (en) * | 2015-07-21 | 2015-12-02 | 安徽六国化工股份有限公司 | Method used for preparing iodine via recovery of phosphorus ore associated high valence iodine in wet phosphoric acid production |
| CN105129820A (en) * | 2015-07-21 | 2015-12-09 | 安徽六国化工股份有限公司 | Method of recycling phosphorite-associated high-valence iodine from wet-method phosphoric acid production to prepare iodized salt |
| CN105217574A (en) * | 2015-09-21 | 2016-01-06 | 贵州鑫新化工集团有限公司 | A kind ofly reclaim the method for iodine and the cooling tower of device and employing in phosphorus production first step cooling tower water coolant |
| CN105217573A (en) * | 2015-09-21 | 2016-01-06 | 贵州鑫新化工集团有限公司 | A kind of method utilizing yellow phosphoric tail gas to prepare glycol recovery iodine |
| CN105271123A (en) * | 2015-09-21 | 2016-01-27 | 贵州鑫新化工集团有限公司 | Method and apparatus for recovering iodine in yellow phosphorus production first stage cooling tower cooling water |
| CN109847565A (en) * | 2019-03-22 | 2019-06-07 | 中科京投环境科技江苏有限公司 | A kind of mercury recyclable device of mercurous exhaust gas |
| CN109847565B (en) * | 2019-03-22 | 2024-02-13 | 中科京投环境科技江苏有限公司 | Mercury recovery device of mercury-containing waste gas |
| CN113526772A (en) * | 2021-09-02 | 2021-10-22 | 常州睿典材料科技有限公司 | Method for recycling solid iodine in iodine-containing wastewater by steam iodine extraction method |
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