CN1821117B - Treatment method of waste water - Google Patents
Treatment method of waste water Download PDFInfo
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- CN1821117B CN1821117B CN2006100089754A CN200610008975A CN1821117B CN 1821117 B CN1821117 B CN 1821117B CN 2006100089754 A CN2006100089754 A CN 2006100089754A CN 200610008975 A CN200610008975 A CN 200610008975A CN 1821117 B CN1821117 B CN 1821117B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/048—Purification of waste water by evaporation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/108—Boron compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/12—Halogens or halogen-containing compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
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- Mechanical Engineering (AREA)
- Removal Of Specific Substances (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The process of eliminating boron and iodine from waste water containing high concentration boron and iodine is disclosed. The process includes the following steps: regulating the pH value of waste water containing iodine and/or iodine ion and boron and/or boron ion to 8-14; concentrating to reach boron and/or boron ion concentration to 0.5 wt% or higher; cooling the obtained liquid and regulating pH value to 1-7 so as to separate out boron component; and eliminating the separated matter and separating boron and/or boron ion.
Description
Technical field
The present invention relates to wastewater treatment method; More particularly; Relate to through under alkaline condition, waste water being carried out evaporation concentration; The pH value that will concentrate waste water then is adjusted to acidity, removing the method for wastewater treatment of the boron of separating out, and relates to being included in and removes the wastewater treatment method of further removing the step of iodine after the boron.
Background technology
Boron cpd is used to various fields, and owing to comprise boron cpd in its waste water that use produced.In Japan, the usage quantity of boric acid is 35000 tons/year, is a kind of comparatively cheap compound, and is therefore discarded by directly without recovery mostly.
In this case, revised anti-water quality in calendar year 2001 and polluted method, from then on begun waste water limiting emission boron.Discharge of wastewater benchmark when being discharged into boron in the ocean is 230ppm or following, and is relative therewith, and the discharge of wastewater benchmark when being discharged in the river usually is 10ppm or following, and any method all must be removed boron.As the method for from general industrial waste water, removing boron, the method that utilize the co-precipitation of magnesium salts to remove, perhaps spent ion exchange resin or boron adsorbent to be removed is known (consulting patent documentation 1 and patent documentation 2).But when removing the boron of high density, the addition of reagent and the generation of mud are all very big, or the increase of above-mentioned regeneration of ion-exchange resin frequency, thereby are uneconomic.
On the other hand, the industry raw material that the iodine conduct is relevant with life is widely used in x-ray contrast medium, medicine, sterilization fungicide etc.; As industrial raw material, be widely used in catalyst stabilizer, take a picture with the manufacturing of raw material, polaroid etc.; Use raw material as agricultural, be widely used in fodder additives, weedicide etc.But in these purposes, iodine nearly all is not to use separately, but mixes use with various materials.Be known that in liquid the situation used with organic property stablizer etc. and employed solvent etc. uses in the step of industrial material production situation a lot.
All the time; Employed iodine, iodine compound and their aqueous solution are processed with the form of waste water usually in these industries; And because bactericidal properties that iodine had, handle the mikrobe that waste water uses to be killed iodine but also can cause the organic substance of BOD loading also to be discharged not only with the form of waste water; Consequently waste water has caused burden to environment, produce with as the relevant problem of the iodine loss of world's precious resources.
From the waste water that contains iodine, reclaim the method for iodine, for example comprise that the iodine that will contain in the water of iodine through oxygenants such as chlorine becomes free iodine, obtain the iodine of precipitation forms, pressurizing melting carries out the purified currently known methods to the water that contains iodine then.But, if in containing the water of iodine, have organism etc., the settling character variation of free-iodine then; The usage quantity of oxygenant increases; In treating processes, expend time in, exist organism to be present in the medium problem of iodine, a kind of good method of therefore can not saying so with the impurity form.
[patent documentation 1] spy opens the 2004-074038 communique
[patent documentation 2] spy opens flat 9-010766 communique
Summary of the invention
Therefore, the object of the present invention is to provide a kind of method of from the waste water that contains high density boron, removing boron efficiently.It is a kind of when waste water also comprises iodine except boron that another object of the present invention is to provide, and after removing boron, effectively removes the method for iodine.
The problems referred to above solve through following (1)～(15).
(1) a kind of wastewater treatment method, it comprises: the pH value that will comprise iodine and/or iodide ion and boron and/or boron ionic waste water is adjusted to 8～14 step; Make above-mentioned boron and/or boron ionic concentration (being converted into boron) reach 0.5 quality % or above enrichment step; Through in the liquid that obtains in the above-mentioned enrichment step in cooling with the pH value of liquid be adjusted to 1～7 boron component is separated out step; With remove the precipitate that obtains in the above-mentioned step that boron component is separated out, separate boron and/or boron ionic step.
(2) like above-mentioned (1) described method, wherein above-mentioned enrichment step carries out through heating evaporation.
(3) like above-mentioned (1) or (2) described method, wherein above-mentioned enrichment step carries out continuously.
(4) like each described method of above-mentioned (1)～(3), wherein above-mentioned enrichment step proceeds to above-mentioned boron and/or boron ionic concentration (being converted into boron) reaches 0.5～4.8 quality %.
(5), wherein the pH value of above-mentioned waste water is adjusted to 8～14 step and is to use at least a kind of an alkali metal salt being selected from sodium hydroxide, Pottasium Hydroxide and calcium hydroxide or alkaline earth salt to carry out like each described method of above-mentioned (1)～(4).
(6) like each described method of above-mentioned (1)～(5), wherein make in the step that boron component separates out above-mentioned, the temperature of cooled liquid is-10～60 ℃, the pH value of liquid is 1～4.
(7) a kind of wastewater treatment method, it comprises: the pH value that will comprise iodine and/or iodide ion and boron and/or boron ionic waste water is adjusted to 8～14 step; Make above-mentioned boron and/or boron ionic concentration (being converted into boron) reach 0.5 quality % or above enrichment step; Through in the liquid that obtains in the above-mentioned enrichment step in cooling with the pH value of liquid be adjusted to 1～7 boron component is separated out step; Remove the precipitate that obtains in the above-mentioned step that boron component is separated out, separate boron and/or boron ionic step; With through in the resulting liquid of above-mentioned separating step, adding chlorine, make iodine and/or iodide ion oxidation, reclaim the step of iodine through sedimentation.
(8) like above-mentioned (7) described method, wherein above-mentioned enrichment step carries out through heating evaporation.
(9) like above-mentioned (7) or (8) described method, wherein above-mentioned enrichment step carries out continuously.
(10) like each described method of above-mentioned (7)～(9), wherein above-mentioned enrichment step proceeds to above-mentioned boron and/or boron ionic concentration (being converted into boron) reaches 0.5～4.8 quality %.
(11), wherein the pH value of above-mentioned waste water is adjusted to 8～14 step and is to use at least a kind of an alkali metal salt being selected from sodium hydroxide, Pottasium Hydroxide and calcium hydroxide or alkaline earth salt to carry out like each described method of above-mentioned (7)～(10).
(12) like each described method of above-mentioned (7)～(11), wherein make in the step that boron component separates out above-mentioned, the temperature of cooled liquid is-10～60 ℃, the pH value of liquid is 1～4.
(13) like above-mentioned (1) or (7) described method, wherein the above-mentioned pH value of the liquid in the step that boron component separates out that makes is adjusted to 1～7, be to use at least a kind of being selected from sulfuric acid, hydrochloric acid, nitric acid and phosphoric acid or multiple acid to carry out.
(14) like above-mentioned (7) described method, wherein, make in the step that boron component separates out above-mentioned, further comprise in order to remove the organism that liquid comprises, add step with respect to the sorbent material of liquid 0.01～10 quality %.
(15) like above-mentioned (14) described method, wherein above-mentioned sorbent material is gac or acidic white earth.
Through the present invention, can from the waste water that comprises high density boron, remove boron effectively, and then when waste water also comprises iodine except boron, can after removing boron, remove iodine effectively.
Embodiment
With reference to the accompanying drawings preferred implementation of the present invention is described.
Fig. 1 is the schema of an embodiment of expression method of wastewater treatment of the present invention.As shown in Figure 1, will comprise iodine and/or iodide ion and boron and/or boron ionic waste water 1 is sent in the pH regulator groove 3, through adding alkaline pH regulator 2 the pH value is adjusted to 8～14, preferred 11～13.This be for the free of iodine in suppressing waste liquid simultaneously, boric acid can easily not separated out when making subsequently evaporation concentration.At this moment, used alkaline pH regulator is preferably at least a kind that is selected from sodium hydroxide, Pottasium Hydroxide and calcium hydroxide, but is not limited to this.Above-mentioned alkaline pH regulator can use with solid form, also can use with aqueous solution form.From the viewpoint of solubleness, more preferably sodium hydroxide and Pottasium Hydroxide.
The liquid that the pH value is adjusted to alkalescence carries out evaporation concentration, until boron in concentration tank and/or boron ionic concentration (being converted into boron) be 0.5 quality % or more than, preferred 0.5～4.8 quality %, more preferably 1～4.5 quality %.At this moment, as mentioned below, the distillate 5a that the vapour condensation that is produced forms can remove the dilution water 5b of liquid 12 as required as boron.
Liquid to evaporation concentration cools off 6.The temperature regulation that preferably will cool off the liquid after 6 is to being-10～60 ℃, more preferably 0～30 ℃.In order to remove boron subsequently, through acidic ph modifier the pH value is adjusted to 1～7, preferred 1～4, carry out crystallization 9.As employed acidic ph modifier, preferably sulfuric acid, hydrochloric acid, nitric acid, phosphoric acid are if consider subsequent step, more preferably sulfuric acid.In the regulating step of this pH value, because therefore the situation that exists the temperature of liquid to rise behind pH regulator, can further carry out the step of cooling liqs.
At this moment, when having organism in the above-mentioned waste water, may make the settling property that possibly produce and be included in the free-iodine in the waste water in the chlorine oxidation step when making iodine worsen, the recovery of iodine is reduced.In order to prevent this situation, can preferably add with respect to above-mentioned waste water 0.01～10 quality %, the more preferably sorbent material of 0.05～1.0 quality %.Organism can be removed through this sorbent material, and the settleability of free-iodine can be improved.As above-mentioned sorbent material, preferred gac or acidic white earth.In addition, add sorbent material opportunity can after state after boron removes 10 step.
Settled boron and the sorbent material when adding sorbent material remove 10 through boron and be removed the liquid 12 of the boron that has been removed.Remove in 10 at boron, can filter or solid-liquid separation operation such as decant.Can be used in the device of this solid-liquid separation; Spiral decanting vessel etc. for example; Behind lock out operation, be washed totally through adding dilution water 5b; Relaxed the boric acid state of saturation that boron is removed liquid 12 through this dilution water 5b simultaneously, can prevent because the separating out again of the boric acid of the supersaturation that difference the caused part of the gentle outside atmosphere temperature of liquid.
In addition, boron is removed liquid 12 in order to carry out boron recovering step subsequently, can it be diluted to predetermined concentration through dilution water 5b.
Fig. 2 representes another embodiment of wastewater treatment of the present invention.
As shown in Figure 2, in having removed the liquid 32 behind the boron, add dilution water 25b, with the same dilution of situation of Fig. 1, then, in this dilution process liquid 33, add chlorine 34, carry out oxide treatment, thereby iodine crystal is separated out.The liquid of having separated out iodine crystal is sent in the melting kettle 35, the free-iodine of separating out is precipitated out.Supernatant is overflowed as treating water 37, and sedimentary iodine is recovered from the bottom with the form of iodine 36.
Contain iodine and/or iodide ion and boron and/or boron ionic waste water through concentrating, so with the pH value of this liquid concentrator be adjusted to 4 or below, improved the adsorption efficiency that organism is removed gac in the process.When the application target of gac is the waste water after removing boron, to take out iodine, improve the settleability of iodine crystal in crystallizer tank that obtains through chlorine oxidation.
Embodiment
Below, through embodiment the present invention is carried out detailed explanation, but the present invention is not limited to these embodiment.
Embodiment 1
It is 5 that the pH value of concentrating under reduced pressure 804g is adjusted to 12 boron concentration, and the waste water of 915mg/L obtains the 229g liquid concentrator.In this liquid concentrator of 204g, add the 16g vitriol oil, pH value is adjusted to 4, be cooled to 5 ℃ of stirrings when as follows then, boron is separated out.Then through removing by filter the boron of separating out.
The filtrating of removing behind the boron is 168g, and boron concentration is 5,682mg/L.The absolute magnitude of boron is 4 before processing, 195mg, handling the back be 730mg, reduce to handle preceding below 1/5.
Embodiment 2
Through being adjusted to 12 boron concentration with embodiment 1 identical method concentrating under reduced pressure pH value is 6, and 000mg/L, iodine concentration are the aqueous solution of 7.8 quality %.Boron concentration in the resulting liquid concentrator is 22,000mg/L, and the concentration of iodine is 23.3 quality %.In this liquid concentrator of 200g, add the 0.6g Exocarpium cocois (Cocos nucifera L) class Powdered Activated Carbon (egression (registered trademark)) (the 0.1 quality % that is equivalent to the preceding aqueous solution of concentrating under reduced pressure) and the 15.1g vitriol oil, the pH value is adjusted to 3.Behind pH regulator, stirred 30 minutes, and then, stirred 30 minutes through the ice-water bath cooling.Boron and gac to separating out filter, and obtain 172g filtrating.In 64g should filtrate, add 126g water and diluted, be blown into chlorine until the ORP of this diluent (redox potential) value above 700mV, the settleability of the free-iodine of separating out through Visual Confirmation.The result is good.
Comparative example
Being adjusted to 12 boron concentration to the pH of 200g value is 6, and 000mg/L, iodine concentration are to add the Exocarpium cocois (Cocos nucifera L) class Powdered Activated Carbon (egression (registered trademark)) and the vitriol oil in the aqueous solution of 7.8 quality %, and the pH value is adjusted to 3～5.The amount of the gac that added of preparation is 0.1～0.5 quality % and with 5 samples altogether of 0.1 quality % interval variation with respect to the above-mentioned liquid of having regulated the pH value of 200g.Regulate the pH value of each sample, at room temperature stirred 30 minutes.Carry out the filtration of gac then, in resulting filtrating, be blown into chlorine and surpass 700mV, the settleability of the free-iodine of separating out through Visual Confirmation until the ORP of this filtrating value.The result is, amounts of activated carbon be 0.5 quality % then can not confirm to improve for amounts of activated carbon good a little, below it for good basically, 0.3 quality % for good, 0.4 quality %.
Description of drawings
Fig. 1 is the schema of an embodiment of expression method of wastewater treatment of the present invention.
Fig. 2 is the schema of another embodiment of expression method of wastewater treatment of the present invention.
The explanation of Reference numeral
1,21 ... Waste water
2,22 ... The alkaline pH regulator
3,23 ... PH regulator
4,24 ... Evaporation concentration
5a, 25a ... Distillate
5b, 25b ... Dilution water
6,26 ... Cooling
7,27 ... Acidic ph modifier
8,28 ... The pH value is regulated
9,29 ... Crystallization
10,30 ... Solid-liquid separation
11,31 ... Boron component
12,32 ... Boron is removed liquid
33 ... Dilution process liquid
34 ... Chlorine
35 ... Melting kettle
36 ... Iodine
37 ... Treating water.
Claims (15)
1. wastewater treatment method, it comprises: the pH value that will comprise iodine and/or iodide ion and boron and/or boron ionic waste water is adjusted to 8～14 step; Above-mentioned pH value is adjusted to the liquid concentration that obtains in 8～14 the step, makes above-mentioned boron and/or boron ionic concentration reach 0.5 quality % or above enrichment step; Through in the liquid that obtains in the above-mentioned enrichment step in cooling with the pH value of liquid be adjusted to 1～7 boron component is separated out step; With remove the precipitate that obtains in the above-mentioned step that boron component is separated out, separate boron and/or boron ionic step, wherein said boron ionic concentration is the concentration that is converted into the boron meter.
2. the method for claim 1, wherein above-mentioned enrichment step carries out through heating evaporation.
3. according to claim 1 or claim 2 method, wherein above-mentioned enrichment step carries out continuously.
4. according to claim 1 or claim 2 method, wherein above-mentioned enrichment step proceeds to above-mentioned boron and/or boron ionic concentration reaches 0.5～4.8 quality %, and wherein said boron ionic concentration is the concentration that is converted into the boron meter.
5. according to claim 1 or claim 2 method wherein is adjusted to 8～14 step with the pH value of above-mentioned waste water and is to use at least a kind of being selected from sodium hydroxide, Pottasium Hydroxide and calcium hydroxide to carry out.
6. according to claim 1 or claim 2 method wherein makes in the step that boron component separates out above-mentioned, and the temperature of cooled liquid is-10～60 ℃, and the pH value of liquid is 1～4.
7. wastewater treatment method, it comprises: the pH value that will comprise iodine and/or iodide ion and boron and/or boron ionic waste water is adjusted to 8～14 step; Above-mentioned pH value is adjusted to the liquid concentration that obtains in 8～14 the step, makes above-mentioned boron and/or boron ionic concentration reach 0.5 quality % or above enrichment step; Through in the liquid that obtains in the above-mentioned enrichment step in cooling with the pH value of liquid be adjusted to 1～7 boron component is separated out step; Remove the precipitate that obtains in the above-mentioned step that boron component is separated out, separate boron and/or boron ionic step; With through in the resulting liquid of above-mentioned separating step, adding chlorine, make iodine and/or iodide ion oxidation, reclaim the step of iodine through sedimentation, wherein said boron ionic concentration is the concentration that is converted into the boron meter.
8. method as claimed in claim 7, wherein above-mentioned enrichment step carries out through heating evaporation.
9. like claim 7 or 8 described methods, wherein above-mentioned enrichment step carries out continuously.
10. like claim 7 or 8 described methods, wherein above-mentioned enrichment step proceeds to above-mentioned boron and/or boron ionic concentration reaches 0.5～4.8 quality %, and wherein said boron ionic concentration is the concentration that is converted into the boron meter.
11., wherein the pH value of above-mentioned waste water is adjusted to 8～14 step and is to use at least a kind of being selected from sodium hydroxide, Pottasium Hydroxide and calcium hydroxide to carry out like claim 7 or 8 described methods.
12. like claim 7 or 8 described methods, wherein make in the step that boron component separates out above-mentioned, the temperature of cooled liquid is-10～60 ℃, the pH value of liquid is 1～4.
13. like claim 1 or 7 described methods, wherein the above-mentioned pH value of the liquid of the step that boron component separates out that makes is adjusted to 1～7, is to use at least a kind of acid being selected from sulfuric acid, hydrochloric acid, nitric acid and phosphoric acid to carry out.
14. method as claimed in claim 7 wherein, makes in the step that boron component separates out above-mentioned, comprises that further adding with respect to liquid is the step of the sorbent material of 0.01～10 quality % in order to remove the organism that liquid comprises.
15. method as claimed in claim 14, wherein above-mentioned sorbent material is gac or acidic white earth.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005021597 | 2005-01-28 | ||
| JP2005021597 | 2005-01-28 | ||
| JP2005-021597 | 2005-01-28 |
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| Publication Number | Publication Date |
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| CN1821117A CN1821117A (en) | 2006-08-23 |
| CN1821117B true CN1821117B (en) | 2012-05-16 |
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| CN2006100089754A Active CN1821117B (en) | 2005-01-28 | 2006-01-27 | Treatment method of waste water |
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| KR (1) | KR101233776B1 (en) |
| CN (1) | CN1821117B (en) |
| TW (1) | TWI383958B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4948305B2 (en) * | 2007-07-23 | 2012-06-06 | 合同資源産業株式会社 | Method and system for circulating use of polarizing film manufacturing chemicals |
| KR100985386B1 (en) * | 2010-07-29 | 2010-10-08 | 황재창 | Method for purification of polarized sheet waste solution |
| TW201328983A (en) * | 2012-01-03 | 2013-07-16 | Hong He Environmental Technology Co Ltd | Method and device for concentrating iodine-containing solution |
| KR101380406B1 (en) * | 2012-04-05 | 2014-04-10 | 주식회사 포스코 | Boron recovering device, method for recovering boron and boron recovering system |
| CN108083528A (en) * | 2016-11-21 | 2018-05-29 | 江苏同禾药业有限公司 | A kind of method that waste water containing boron is handled in 6- hydroxyl -8- Lipase Catalyzed Resolution of Racemic Ethyl preparation process |
| KR101935818B1 (en) * | 2017-05-23 | 2019-01-07 | 세종화학 (주) | Method for recycling a potassium iodide solution in waste solution from polarizing film process |
| TWI805426B (en) * | 2022-06-29 | 2023-06-11 | 暟豐實業有限公司 | Boron resource recovery system for waste liquid |
| CN114956436B (en) * | 2022-08-01 | 2022-11-01 | 江苏同禾药业有限公司 | Method for recovering boron element from production wastewater |
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| CN1058003A (en) * | 1990-06-08 | 1992-01-22 | 比托西戴尼拉公司 | Depolymerization tincalcite ore is to produce the method for Sodium Tetraborate and lime borate in alkaline medium |
| JP2001314864A (en) * | 2000-05-08 | 2001-11-13 | Japan Organo Co Ltd | Treating method for waste liquid from polarizing plate manufacturing |
| JP2002310974A (en) * | 2001-04-11 | 2002-10-23 | Hirotaka Komiya | Acidic air detector |
| JP2004074038A (en) * | 2002-08-20 | 2004-03-11 | Tohoku Electric Power Co Inc | Recovering method of boron |
| CN1528666A (en) * | 2003-10-08 | 2004-09-15 | 四川石油管理局川西北矿区 | Process for preparing kali salt and boric acid from bittern |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4049382A (en) * | 1977-02-16 | 1977-09-20 | Orion Research Incorporated | Total residual chlorine |
| US4402835A (en) * | 1980-11-13 | 1983-09-06 | Istituto Guido Donegani S.P.A. | Process for removing soluble boron compounds from aqueous effluents |
| US4800042A (en) * | 1985-01-22 | 1989-01-24 | Jgc Corporation | Radioactive waste water treatment |
| JP2732642B2 (en) * | 1989-02-03 | 1998-03-30 | 日宝化学株式会社 | How to collect iodine |
| JP3672262B2 (en) * | 1994-05-30 | 2005-07-20 | 栗田工業株式会社 | Method for treating boron-containing water |
-
2006
- 2006-01-23 TW TW095102471A patent/TWI383958B/en not_active IP Right Cessation
- 2006-01-27 CN CN2006100089754A patent/CN1821117B/en active Active
- 2006-01-27 KR KR1020060009035A patent/KR101233776B1/en active IP Right Grant
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1058003A (en) * | 1990-06-08 | 1992-01-22 | 比托西戴尼拉公司 | Depolymerization tincalcite ore is to produce the method for Sodium Tetraborate and lime borate in alkaline medium |
| JP2001314864A (en) * | 2000-05-08 | 2001-11-13 | Japan Organo Co Ltd | Treating method for waste liquid from polarizing plate manufacturing |
| JP2002310974A (en) * | 2001-04-11 | 2002-10-23 | Hirotaka Komiya | Acidic air detector |
| JP2004074038A (en) * | 2002-08-20 | 2004-03-11 | Tohoku Electric Power Co Inc | Recovering method of boron |
| CN1528666A (en) * | 2003-10-08 | 2004-09-15 | 四川石油管理局川西北矿区 | Process for preparing kali salt and boric acid from bittern |
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| Publication number | Publication date |
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| TW200626508A (en) | 2006-08-01 |
| KR20060087457A (en) | 2006-08-02 |
| TWI383958B (en) | 2013-02-01 |
| KR101233776B1 (en) | 2013-02-15 |
| CN1821117A (en) | 2006-08-23 |
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