CA1335668C - Process for removing the nitrite and/or nitrate content in water - Google Patents
Process for removing the nitrite and/or nitrate content in waterInfo
- Publication number
- CA1335668C CA1335668C CA000610969A CA610969A CA1335668C CA 1335668 C CA1335668 C CA 1335668C CA 000610969 A CA000610969 A CA 000610969A CA 610969 A CA610969 A CA 610969A CA 1335668 C CA1335668 C CA 1335668C
- Authority
- CA
- Canada
- Prior art keywords
- water
- catalyst
- process according
- palladium
- nitrite
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 229910001868 water Inorganic materials 0.000 title claims abstract description 202
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 201
- 238000000034 method Methods 0.000 title claims abstract description 92
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 title claims abstract description 90
- 229910002651 NO3 Inorganic materials 0.000 title claims abstract description 87
- 230000008569 process Effects 0.000 title claims abstract description 87
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 title claims abstract description 86
- 239000003054 catalyst Substances 0.000 claims abstract description 140
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 20
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 9
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 9
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 122
- 229910052751 metal Inorganic materials 0.000 claims description 70
- 239000002184 metal Substances 0.000 claims description 70
- 238000006243 chemical reaction Methods 0.000 claims description 67
- 239000011148 porous material Substances 0.000 claims description 61
- 229910052763 palladium Inorganic materials 0.000 claims description 60
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 56
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 44
- 238000009826 distribution Methods 0.000 claims description 43
- 229910052739 hydrogen Inorganic materials 0.000 claims description 41
- 239000012876 carrier material Substances 0.000 claims description 40
- 239000001257 hydrogen Substances 0.000 claims description 40
- 239000002245 particle Substances 0.000 claims description 31
- 239000010949 copper Substances 0.000 claims description 27
- 229910052802 copper Inorganic materials 0.000 claims description 25
- 230000002902 bimodal effect Effects 0.000 claims description 20
- 239000000203 mixture Substances 0.000 claims description 20
- 239000010948 rhodium Substances 0.000 claims description 18
- 229910052703 rhodium Inorganic materials 0.000 claims description 17
- 239000007788 liquid Substances 0.000 claims description 15
- 239000001301 oxygen Substances 0.000 claims description 15
- 229910052760 oxygen Inorganic materials 0.000 claims description 15
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 claims description 15
- 239000000523 sample Substances 0.000 claims description 15
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 14
- 230000000249 desinfective effect Effects 0.000 claims description 12
- 239000012528 membrane Substances 0.000 claims description 11
- 239000000843 powder Substances 0.000 claims description 8
- 239000002253 acid Substances 0.000 claims description 7
- 230000003247 decreasing effect Effects 0.000 claims description 7
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 7
- 230000035515 penetration Effects 0.000 claims description 4
- 238000005086 pumping Methods 0.000 claims description 4
- 229910052709 silver Inorganic materials 0.000 claims description 4
- 229910010272 inorganic material Inorganic materials 0.000 claims description 3
- 239000011147 inorganic material Substances 0.000 claims description 3
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 3
- 239000004332 silver Substances 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims 3
- 235000012239 silicon dioxide Nutrition 0.000 claims 1
- 239000000377 silicon dioxide Substances 0.000 claims 1
- 230000009467 reduction Effects 0.000 abstract description 12
- 238000009903 catalytic hydrogenation reaction Methods 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 17
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical class [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 12
- 238000005470 impregnation Methods 0.000 description 12
- 239000007789 gas Substances 0.000 description 11
- 238000006722 reduction reaction Methods 0.000 description 11
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 10
- 239000003651 drinking water Substances 0.000 description 10
- 235000020188 drinking water Nutrition 0.000 description 10
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 9
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 9
- 239000000126 substance Substances 0.000 description 9
- 239000000969 carrier Substances 0.000 description 8
- 229910052593 corundum Inorganic materials 0.000 description 8
- 238000009792 diffusion process Methods 0.000 description 8
- 229910001845 yogo sapphire Inorganic materials 0.000 description 8
- -1 ammonium ions Chemical class 0.000 description 7
- 239000003795 chemical substances by application Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 150000002736 metal compounds Chemical class 0.000 description 7
- 239000003673 groundwater Substances 0.000 description 6
- 238000009434 installation Methods 0.000 description 6
- 238000003756 stirring Methods 0.000 description 6
- 239000011324 bead Substances 0.000 description 5
- 238000003860 storage Methods 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 238000005984 hydrogenation reaction Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 229920002379 silicone rubber Polymers 0.000 description 4
- 239000004945 silicone rubber Substances 0.000 description 4
- 239000003643 water by type Substances 0.000 description 4
- 241000640882 Condea Species 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 3
- 238000001354 calcination Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 150000002823 nitrates Chemical class 0.000 description 3
- 150000002826 nitrites Chemical class 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 238000005496 tempering Methods 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- 229910002666 PdCl2 Inorganic materials 0.000 description 2
- 239000012736 aqueous medium Substances 0.000 description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 238000010924 continuous production Methods 0.000 description 2
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 235000015203 fruit juice Nutrition 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 description 2
- 239000010842 industrial wastewater Substances 0.000 description 2
- 239000008235 industrial water Substances 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 230000000813 microbial effect Effects 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- PIBWKRNGBLPSSY-UHFFFAOYSA-L palladium(II) chloride Chemical compound Cl[Pd]Cl PIBWKRNGBLPSSY-UHFFFAOYSA-L 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical class [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 2
- 239000004071 soot Substances 0.000 description 2
- 239000002352 surface water Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- USFZMSVCRYTOJT-UHFFFAOYSA-N Ammonium acetate Chemical compound N.CC(O)=O USFZMSVCRYTOJT-UHFFFAOYSA-N 0.000 description 1
- 239000005695 Ammonium acetate Substances 0.000 description 1
- 101100087530 Caenorhabditis elegans rom-1 gene Proteins 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 239000004155 Chlorine dioxide Substances 0.000 description 1
- 229910017610 Cu(NO3) Inorganic materials 0.000 description 1
- 101100305983 Mus musculus Rom1 gene Proteins 0.000 description 1
- 101150003085 Pdcl gene Proteins 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 description 1
- 229930006000 Sucrose Natural products 0.000 description 1
- 235000019257 ammonium acetate Nutrition 0.000 description 1
- 229940043376 ammonium acetate Drugs 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 230000031018 biological processes and functions Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 235000019398 chlorine dioxide Nutrition 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000007863 gel particle Substances 0.000 description 1
- 230000002070 germicidal effect Effects 0.000 description 1
- 235000010299 hexamethylene tetramine Nutrition 0.000 description 1
- 239000004312 hexamethylene tetramine Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical class Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000002503 metabolic effect Effects 0.000 description 1
- 229910001960 metal nitrate Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 238000006385 ozonation reaction Methods 0.000 description 1
- 238000010979 pH adjustment Methods 0.000 description 1
- NXJCBFBQEVOTOW-UHFFFAOYSA-L palladium(2+);dihydroxide Chemical compound O[Pd]O NXJCBFBQEVOTOW-UHFFFAOYSA-L 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 238000010517 secondary reaction Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 235000014214 soft drink Nutrition 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000005720 sucrose Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- 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
- C02F1/70—Treatment of water, waste water, or sewage by reduction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/89—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with noble metals
- B01J23/8926—Copper and noble metals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
- B01J35/61—Surface area
- B01J35/615—100-500 m2/g
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
- B01J35/66—Pore distribution
- B01J35/69—Pore distribution bimodal
-
- 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
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- 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
- C02F2101/16—Nitrogen compounds, e.g. ammonia
- C02F2101/163—Nitrates
-
- 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
- C02F2101/16—Nitrogen compounds, e.g. ammonia
- C02F2101/166—Nitrites
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S210/00—Liquid purification or separation
- Y10S210/902—Materials removed
- Y10S210/903—Nitrogenous
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Materials Engineering (AREA)
- Water Supply & Treatment (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Catalysts (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Removal Of Specific Substances (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP3830850.9 | 1988-09-10 | ||
| DE3830850A DE3830850A1 (de) | 1988-09-10 | 1988-09-10 | Verfahren zur entfernung des nitrit- und/oder nitratgehaltes in wasser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1335668C true CA1335668C (en) | 1995-05-23 |
Family
ID=6362708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000610969A Expired - Fee Related CA1335668C (en) | 1988-09-10 | 1989-09-11 | Process for removing the nitrite and/or nitrate content in water |
Country Status (9)
Families Citing this family (64)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5221486A (en) * | 1991-04-12 | 1993-06-22 | Battelle Memorial Institute | Aqueous phase removal of nitrogen from nitrogen compounds |
| US5868495A (en) * | 1991-07-08 | 1999-02-09 | Hidalgo; Oscar Mario Guagnelli | Method for treating fluent materials |
| MX9100106A (es) * | 1991-07-08 | 1993-01-01 | Oscar Mario Guagnelli Hidalgo | Mejoras en sistema para la mezcla continua en particulas solidas, liquidas y/o gaseosas en todas alternativas. |
| US5376240A (en) * | 1991-11-04 | 1994-12-27 | Olin Corporation | Process for the removal of oxynitrogen species for aqueous solutions |
| WO1993009267A1 (de) * | 1991-11-09 | 1993-05-13 | Hans Höllmüller Maschinenbau GmbH & Co. | Verfahren zur regeneration eines ammoniakalischen ätzmittels sowie vorrichtung zur durchführung dieses verfahrens |
| USH1126H (en) | 1991-11-12 | 1993-01-05 | The United States Of America As Represented By The Secretary Of The Navy | Treatment of sodium nitrite-containing boiler wastewater |
| DE4142502A1 (de) * | 1991-12-21 | 1993-06-24 | Solvay Umweltchemie Gmbh | Blasenfreier wasserstoffeintrag in waessrige fluessigkeiten |
| DE4207961A1 (de) * | 1992-03-13 | 1993-09-16 | Solvay Umweltchemie Gmbh | Abriebfester katalysator-traeger |
| JPH07504355A (ja) * | 1992-03-13 | 1995-05-18 | ゾルファイ ウムヴェルトヒェミー ゲゼルシャフト ミット ベシュレンクテル ハフツング | 耐摩耗性の担体触媒 |
| DE4207962A1 (de) * | 1992-03-13 | 1993-09-16 | Solvay Umweltchemie Gmbh | Katalytisches wirbelschichtverfahren zur behandlung waessriger fluessigkeiten |
| US5266174A (en) * | 1992-05-12 | 1993-11-30 | Martin Marietta Energy Systems, Inc. | Process for reducing aqueous nitrate to ammonia |
| DE4221774A1 (de) * | 1992-07-02 | 1994-01-05 | Solvay Umweltchemie Gmbh | Verfahren zur Begasung und Entkeimung und Vorrichtung zur simultanen Durchführung |
| US5370528A (en) * | 1992-08-03 | 1994-12-06 | Martin Marietta Energy Systems, Inc. | Submergible torch for treating waste solutions and method thereof |
| DE59403026D1 (de) * | 1993-03-05 | 1997-07-10 | Solvay Deutschland | Verfahren zur herstellung kugelförmiger teilchen |
| DE59401659D1 (de) * | 1993-03-05 | 1997-03-06 | Solvay Umweltchemie Gmbh | Verfahren zur entfernung des sauerstoff-, nitrit- und/oder nitratgehaltes in wasser |
| DE4315520A1 (de) * | 1993-05-10 | 1994-11-17 | Steag Ag | Verfahren und Vorrichtung zum katalytischen Entfernen von Sauerstoff aus Wasser |
| US5433868A (en) * | 1993-09-09 | 1995-07-18 | Battelle Memorial Institute | Sewage treatment method |
| ES2127557T3 (es) * | 1994-09-08 | 1999-04-16 | Solvay Umweltchemie Gmbh | Procedimiento para la eliminacion de compuestos clorato y bromato del agua por reduccion catalitica. |
| DE4437864A1 (de) * | 1994-10-22 | 1996-04-25 | Vorlop Klaus Dieter | Verfahren zum katalytischen Abbau von Nitrat in Wässern |
| DE4447035A1 (de) * | 1994-12-28 | 1996-07-11 | Eva Gotthold | Verfahren und Vorrichtung zum Reduzieren des Nitratgehaltes von Wasser |
| DE19540012A1 (de) * | 1995-10-27 | 1997-04-30 | Elwatec Elektrolyse Und Wasser | Anlage zur Feinstverteilung eines Gases in einer Flüssigkeit, vorzugsweise zur Hydrierung von Flüssigkeiten, sowie Verfahren zum Betreiben der Anlage |
| US5853693A (en) * | 1996-04-03 | 1998-12-29 | Mitsubishi Gas Chemical Company, Inc. | Hydrogenation catalyst for production of hydrogen peroxide, and method for preparation of same |
| JP3485240B2 (ja) * | 1996-11-01 | 2004-01-13 | 日立プラント建設株式会社 | 窒素除去方法及び装置並びに包括固定化担体 |
| US6030520A (en) * | 1997-04-23 | 2000-02-29 | The Regents Of The University Of California | Nitrate reduction |
| CN1260766A (zh) * | 1997-06-18 | 2000-07-19 | 阿南化成株式会社 | 含硝酸离子排水的处理方法 |
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-
1988
- 1988-09-10 DE DE3830850A patent/DE3830850A1/de not_active Withdrawn
-
1989
- 1989-09-02 ES ES198989116245T patent/ES2032087T3/es not_active Expired - Lifetime
- 1989-09-02 EP EP89116245A patent/EP0359074B1/de not_active Expired - Lifetime
- 1989-09-02 AT AT89116245T patent/ATE76390T1/de active
- 1989-09-02 DE DE8989116245T patent/DE58901484D1/de not_active Expired - Fee Related
- 1989-09-08 DK DK443689A patent/DK443689A/da not_active Application Discontinuation
- 1989-09-11 CA CA000610969A patent/CA1335668C/en not_active Expired - Fee Related
- 1989-09-11 US US07/404,988 patent/US4990266A/en not_active Expired - Fee Related
- 1989-09-11 JP JP1233085A patent/JP2780222B2/ja not_active Expired - Lifetime
-
1990
- 1990-09-04 US US07/576,834 patent/US5122496A/en not_active Expired - Fee Related
-
1992
- 1992-06-05 GR GR910402137T patent/GR3004843T3/el unknown
Also Published As
| Publication number | Publication date |
|---|---|
| ATE76390T1 (de) | 1992-06-15 |
| US4990266A (en) | 1991-02-05 |
| US5122496A (en) | 1992-06-16 |
| DK443689A (da) | 1990-07-13 |
| ES2032087T3 (es) | 1993-01-01 |
| JP2780222B2 (ja) | 1998-07-30 |
| GR3004843T3 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1993-04-28 |
| DK443689D0 (da) | 1989-09-08 |
| DE3830850A1 (de) | 1990-03-22 |
| DE58901484D1 (de) | 1992-06-25 |
| JPH02111495A (ja) | 1990-04-24 |
| EP0359074A1 (de) | 1990-03-21 |
| EP0359074B1 (de) | 1992-05-20 |
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