WO1993000983A1 - Verfahren zum reinigen eines schwefeldioxid und ggf. andere schadstoffe enthaltenden abgases - Google Patents
Verfahren zum reinigen eines schwefeldioxid und ggf. andere schadstoffe enthaltenden abgases Download PDFInfo
- Publication number
- WO1993000983A1 WO1993000983A1 PCT/EP1992/001074 EP9201074W WO9300983A1 WO 1993000983 A1 WO1993000983 A1 WO 1993000983A1 EP 9201074 W EP9201074 W EP 9201074W WO 9300983 A1 WO9300983 A1 WO 9300983A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mercury
- gypsum
- washing liquid
- exhaust gas
- washing
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 22
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 title claims abstract description 11
- 239000003344 environmental pollutant Substances 0.000 title claims abstract description 6
- 231100000719 pollutant Toxicity 0.000 title claims abstract description 6
- 238000004140 cleaning Methods 0.000 title claims abstract description 5
- 239000004291 sulphur dioxide Substances 0.000 title abstract 2
- 235000010269 sulphur dioxide Nutrition 0.000 title abstract 2
- 238000005406 washing Methods 0.000 claims abstract description 37
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 26
- 239000010440 gypsum Substances 0.000 claims abstract description 26
- 239000007788 liquid Substances 0.000 claims abstract description 26
- 229910052753 mercury Inorganic materials 0.000 claims abstract description 22
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000000126 substance Substances 0.000 claims abstract description 15
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims abstract description 12
- 238000000926 separation method Methods 0.000 claims abstract description 11
- 239000002351 wastewater Substances 0.000 claims abstract description 8
- 150000001875 compounds Chemical class 0.000 claims abstract description 6
- GBAOBIBJACZTNA-UHFFFAOYSA-L calcium sulfite Chemical compound [Ca+2].[O-]S([O-])=O GBAOBIBJACZTNA-UHFFFAOYSA-L 0.000 claims abstract description 5
- 235000010261 calcium sulphite Nutrition 0.000 claims abstract description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000011575 calcium Substances 0.000 claims abstract description 3
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 3
- 239000003463 adsorbent Substances 0.000 claims description 17
- 229940100892 mercury compound Drugs 0.000 claims description 17
- 150000002731 mercury compounds Chemical class 0.000 claims description 17
- 239000013078 crystal Substances 0.000 claims description 3
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 claims description 2
- 239000003513 alkali Substances 0.000 claims description 2
- 239000000499 gel Substances 0.000 claims description 2
- 229910052740 iodine Inorganic materials 0.000 claims description 2
- 239000011630 iodine Substances 0.000 claims description 2
- 230000035484 reaction time Effects 0.000 claims description 2
- VIDTVPHHDGRGAF-UHFFFAOYSA-N selenium sulfide Chemical class [Se]=S VIDTVPHHDGRGAF-UHFFFAOYSA-N 0.000 claims description 2
- 150000004763 sulfides Chemical class 0.000 claims description 2
- 239000002244 precipitate Substances 0.000 claims 1
- 235000011132 calcium sulphate Nutrition 0.000 abstract 1
- 239000001175 calcium sulphate Substances 0.000 abstract 1
- 239000004295 calcium sulphite Substances 0.000 abstract 1
- 239000000428 dust Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 14
- 239000002245 particle Substances 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical class [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- RCTYPNKXASFOBE-UHFFFAOYSA-M chloromercury Chemical compound [Hg]Cl RCTYPNKXASFOBE-UHFFFAOYSA-M 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 238000005201 scrubbing Methods 0.000 description 2
- 229910000338 selenium disulfide Inorganic materials 0.000 description 2
- JNMWHTHYDQTDQZ-UHFFFAOYSA-N selenium sulfide Chemical class S=[Se]=S JNMWHTHYDQTDQZ-UHFFFAOYSA-N 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 239000002562 thickening agent Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000003077 lignite Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 150000002730 mercury Chemical class 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 229940065287 selenium compound Drugs 0.000 description 1
- 150000003343 selenium compounds Chemical class 0.000 description 1
- 229960005265 selenium sulfide Drugs 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- HYHCSLBZRBJJCH-UHFFFAOYSA-N sodium polysulfide Chemical compound [Na+].S HYHCSLBZRBJJCH-UHFFFAOYSA-N 0.000 description 1
- 229910052979 sodium sulfide Inorganic materials 0.000 description 1
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- SOBHUZYZLFQYFK-UHFFFAOYSA-K trisodium;hydroxy-[[phosphonatomethyl(phosphonomethyl)amino]methyl]phosphinate Chemical compound [Na+].[Na+].[Na+].OP(O)(=O)CN(CP(O)([O-])=O)CP([O-])([O-])=O SOBHUZYZLFQYFK-UHFFFAOYSA-K 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/64—Heavy metals or compounds thereof, e.g. mercury
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/46—Sulfates
- C01F11/464—Sulfates of Ca from gases containing sulfur oxides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G13/00—Compounds of mercury
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G13/00—Compounds of mercury
- C01G13/003—Preparation involving a liquid-liquid extraction, an adsorption or an ion-exchange
Definitions
- the invention relates to a method for purifying an exhaust gas containing sulfur dioxide, mercury and possibly other pollutants, in which the exhaust gas is dedusted and washed in at least one stage with a calcium-containing washing liquid and in which the calcium sulfite formed with the addition of air in calcium sulfate (gypsum) is converted and then calcium sulfate-containing washing liquid is removed and gypsum is separated from the removed washing liquid.
- gypsum calcium sulfate
- a cleaning method with two-stage wet washing is known.
- the first wash stage is used for cooling the flue gas and for the separation of other harmful gases such as HF, HC1 and heavy metals, while the second wash stage is used for S0 2 separation and the adjustment of the clean gas values.
- Solids-containing washing liquid is drawn off from the bottom of both washing stages and fed to a thickener.
- the thickened washing liquid is fed to a filter press. If mercury is contained to a large extent in the flue gas as a divalent ion, mercury is introduced in the known method via the thickener into the solid matter withdrawn from the filter press, which consists essentially of gypsum. This mercury entry limits the use of gypsum.
- This object is achieved in that a chemical which converts the mercury into a water-insoluble compound and / or an adsorbent which adsorbs the mercury is added to the exhaust gas before the washing or the washing liquid itself and the water-insoluble compound or the laden adsorbent when the gypsum is separated off from the withdrawn washing liquid is discharged with the waste water.
- Alkali sulfide compounds and selenium sulfide compounds, as well as iodine or sulfur in solid form, in particular sulfur bloom, are preferably suitable as the chemical leading to a water-insoluble mercury compound, which is preferably added to the flue gas before the first washing stage.
- Sodium sulfides such as sodium polysulfide Na 2 S ⁇ or sodium monosulfide Na2S are particularly preferred.
- the selenium compounds include in particular the selenium disulfide SeS2. mixtures of the chemicals can be used.
- Granular carbon-containing adsorbents such as lignite or hard coal activated coke / coal, or other fine-particle adsorbents such as diatomaceous earth or activated Al2O3 are particularly suitable as adsorbents.
- About the adsorbents in the sense of the present invention also include gels such as B silica gel, which can absorb the mercury.
- the chemical or the adsorbent leading to the sparingly soluble mercury compound is preferably added to the exhaust gas before the first stage.
- Mercury compounds or the mercury-laden adsorbent when separating the gypsum from the removed washing liquid is possible because the particles of the sparingly soluble mercury compound and the adsorbent particles differ in terms of their particle size distribution, shape and / or density from that in the main scrubber and possibly in the pre-scrubber differentiate produced plaster. It can A different parameter may be sufficient to achieve the separation with the waste water from the gypsum.
- the particles of the poorly soluble mercury compounds have a flaky shape and thus differ significantly from the gypsum crystals, which in particular have an elongated shape.
- the adsorbent particles can be assumed to have a much lower density than the gypsum crystals. In this way, it is possible to separate the mercury compounds or the adsorbed mercury from the gypsum when the gypsum is separated from the washing liquid with the wastewater from the dewatering and separation stage.
- a method is thus specified in which, surprisingly, with a process step which is already present per se, namely the separation of gypsum with drainage, it is also possible to keep the mercury away from the gypsum; the dewatering and separation stage only has to respond to at least one of the parameters shown above.
- a combination of a cyclone station with a downstream belt filter or a centrifuge, in particular an overflow centrifuge, is particularly suitable for separating the mercury from the gypsum while draining the gypsum.
- the addition is to be carried out in such a way that a reaction time which is sufficient for the reaction to the water-insoluble mercury compounds is achieved before entering the at least one washing stage.
- the aftertreatment of the waste water to remove the insoluble mercury compounds or the activated carbon particles loaded with mercury is carried out in a known manner.
- Fig. 1 shows a procedure in which the dewatering takes place with the aid of a cyclone station and downstream band filter
- Fig. 2 shows a procedure in which the dewatering takes place with a centrifuge.
- the dedusted raw gas to be cleaned is fed via line 1 to an HCl scrubber 2, to which a scrubbing circuit 3 is assigned. Via a line 4 At a predetermined distance from the head 2a of the HCl scrubber, sodium monosulfite is supplied, which together with the mercury contained in the raw gas stream in the form of HgCl 2 according to the following equation:
- the water-insoluble mercury compounds are introduced into the liquid of the washing circuit 3.
- the gas cooled in the HC1 washer and freed from HC1 and possibly other pollutants is transferred via line 5 into a SO ⁇ ashtray 6, to which a washing circuit 7 is assigned and in which the main part of S0 2 is removed from the exhaust gas.
- Lime milk is fed to both washers via a line 8 with branch lines 8a and 8b, this being fed via line 8a to adjust the pH in the HC1 scrubber 2, while the larger part is fed via line 8b to the SC ⁇ scrubber to form calcium sulfite is fed.
- Both washers are still supplied with air via lines 9 leading to the laundry sump in order to convert the calcium sulfite formed to calcium sulfate.
- a chemical such as the product marketed under the trade name METALLCLEAN is fed to the scrubber via line 10, while one is fed via line 11 to the scrubber 6
- Chemical such as the product sold by Degussa under the name TMT 15, a 2.4.6-trimercaptotriazine, trisodium solution.
- Washing liquid is discharged from the circuits 3 and 7 via the lines 12 and 13 and fed to a collecting container 14.
- Loaded washing liquid is fed to a dewatering assembly 15 from this collecting container 14. which consists of a cyclone station 16 and a downstream band filter 17.
- the overflow of the cyclone station is fed via a line 18 and the waste water of the belt filter 17 via a line 19 to a collecting tank 20 from which the waste water is drawn off.
- the poorly soluble mercury compound is discharged with the overflow liquid via line 18.
- washing liquid is fed from the collecting container 14 to a drainage assembly 16 which has an overflow centrifuge 21.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Treating Waste Gases (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP4123258.5 | 1991-07-13 | ||
| DE19914123258 DE4123258A1 (de) | 1991-07-13 | 1991-07-13 | Verfahren zum reinigen eines schwefeldioxid und ggf. andere schadstoffe enthaltenden abgases |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1993000983A1 true WO1993000983A1 (de) | 1993-01-21 |
Family
ID=6436080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP1992/001074 WO1993000983A1 (de) | 1991-07-13 | 1992-05-15 | Verfahren zum reinigen eines schwefeldioxid und ggf. andere schadstoffe enthaltenden abgases |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE4123258A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) |
| WO (1) | WO1993000983A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100366326C (zh) * | 2000-12-08 | 2008-02-06 | 奥托库姆普联合股份公司 | 从气体中除去汞的方法 |
| US11319233B2 (en) | 2018-08-17 | 2022-05-03 | Steve Feeney Consulting, Llc | Control of aqueous arsenic, selenium, mercury or other metals from flue gas |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK170887B1 (da) * | 1993-01-21 | 1996-03-04 | Fls Miljoe A S | Fremgangsmåde og anvendelse af et anlæg til rensning af restprodukter fra røggasrensningsanlæg |
| DE4326279A1 (de) * | 1993-08-05 | 1995-02-16 | Veba Kraftwerke Ruhr | Verfahren zum Abscheiden von Quecksilber aus Rauchgas |
| SE502159C2 (sv) * | 1993-12-22 | 1995-09-04 | Flaekt Ab | Sätt och anordning att framställa gips med hög renhet |
| DE4437781A1 (de) * | 1994-10-25 | 1996-05-02 | Steinmueller Gmbh L & C | Verfahren zum Entfernen von Quecksilber aus einem quecksilberhaltigen Abgas |
| DE4441090A1 (de) * | 1994-11-18 | 1996-05-23 | Steag Ag | Verfahren und Vorrichtung zum Reinigen von Verbrennungsabgasen |
| DE19542065C2 (de) * | 1995-11-13 | 1997-10-23 | Steag Ag | Verfahren und Vorrichtung zum Reinigen von Verbrennungsabgasen aus Feuerungsanlagen |
| DE19730909A1 (de) * | 1997-07-18 | 1999-01-21 | Babcock Anlagen Gmbh | Verfahren zur Entfernung von Schad- und Spurenstoffen aus Rauchgas insbesondere von Müllverbrennungsanlagen |
| DE19800726C1 (de) * | 1998-01-12 | 1999-09-23 | Metallgesellschaft Ag | Verfahren zur Abscheidung von elementaren Schwermetallen aus Abgasen |
| EP1077757B1 (en) * | 1998-05-08 | 2003-03-19 | Isca Management Limited | Mercury removal from flue gas |
| JP3711229B2 (ja) | 2000-06-30 | 2005-11-02 | 株式会社日本触媒 | 廃液処理方法 |
| DE102012214065A1 (de) | 2012-08-08 | 2014-02-13 | EnBW Energie Baden-Württemberg AG | Verfahren zum Entfernen von Quecksilber aus Rauchgas in einem Nasswäscher |
| DE102015218462A1 (de) | 2015-09-25 | 2017-03-30 | EnBW Energie Baden-Württemberg AG | Apparative Ergänzung von Nasswäschern in Kohlekraftwerken zur besseren und sichereren Abscheidung von Quecksilber und seinen Verbindungen |
| CN106241384B (zh) * | 2016-09-12 | 2019-03-19 | 中国电力工程顾问集团西南电力设计院有限公司 | 一种石灰石粉气力输送系统及控制方法 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3119749C2 (de) * | 1981-05-18 | 1984-11-08 | Steag Ag, 4300 Essen | Verfahren zur Herstellung von Calciumsulfathalbhydrat aus Rauchgasgips |
| DD236459A1 (de) * | 1985-04-25 | 1986-06-11 | Leipzig Chemieanlagen | Verfahren zur nassen so tief 2- abscheidung aus rauch- oder abgasen |
| DE2728692C2 (de) * | 1976-08-19 | 1986-12-04 | Dowa Mining Co. Ltd., Tokio/Tokyo | Verfahren zur Entfernung von quecksilberhaltigen Verunreinigungen aus sauren Gasen |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3827831A1 (de) * | 1988-08-17 | 1990-02-22 | Thyssen Industrie | Verfahren und anlage zur aufbereitung von abwasser, insbesondere aus der rauchgasentschwefelung |
| DE4032249C2 (de) * | 1989-10-14 | 1998-09-24 | Knauf Westdeutsche Gips | Verfahren zur Aufhellung von Rauchgasgips |
-
1991
- 1991-07-13 DE DE19914123258 patent/DE4123258A1/de active Granted
-
1992
- 1992-05-15 WO PCT/EP1992/001074 patent/WO1993000983A1/de active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2728692C2 (de) * | 1976-08-19 | 1986-12-04 | Dowa Mining Co. Ltd., Tokio/Tokyo | Verfahren zur Entfernung von quecksilberhaltigen Verunreinigungen aus sauren Gasen |
| DE3119749C2 (de) * | 1981-05-18 | 1984-11-08 | Steag Ag, 4300 Essen | Verfahren zur Herstellung von Calciumsulfathalbhydrat aus Rauchgasgips |
| DD236459A1 (de) * | 1985-04-25 | 1986-06-11 | Leipzig Chemieanlagen | Verfahren zur nassen so tief 2- abscheidung aus rauch- oder abgasen |
Non-Patent Citations (4)
| Title |
|---|
| Derwent Accession Nr. 78-791 16A, Questel Tele- systems (WPI), Derwent Publications Ltd., London, GB, * |
| Derwent Accession Nr. 80-782 05C, Questel Tele- systems (WPI), Derwent Publications Ltd., London GB, * |
| Patent Abstracts of Japan, unexamined applications, C Sektion, Band 11, Nr. 365, 27. November 1987, The Patent Office Japanese Government, * |
| Patent Abstracts of Japan, unexamined applications, C Sektion, Band 12, Nr. 37, 04. Februar 1988, The Patent Office Japanese Government, * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100366326C (zh) * | 2000-12-08 | 2008-02-06 | 奥托库姆普联合股份公司 | 从气体中除去汞的方法 |
| US11319233B2 (en) | 2018-08-17 | 2022-05-03 | Steve Feeney Consulting, Llc | Control of aqueous arsenic, selenium, mercury or other metals from flue gas |
Also Published As
| Publication number | Publication date |
|---|---|
| DE4123258C2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1993-07-01 |
| DE4123258A1 (de) | 1993-01-14 |
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