NO152732B - IMPROVED ACTIVE COAL FOR REMOVAL OF SURE, CATALYTIC DEGRADABLE HAZARDOUS GASES AND GASES TO BE CHEMICAL BONDED FROM AIR - Google Patents
IMPROVED ACTIVE COAL FOR REMOVAL OF SURE, CATALYTIC DEGRADABLE HAZARDOUS GASES AND GASES TO BE CHEMICAL BONDED FROM AIR Download PDFInfo
- Publication number
- NO152732B NO152732B NO784107A NO784107A NO152732B NO 152732 B NO152732 B NO 152732B NO 784107 A NO784107 A NO 784107A NO 784107 A NO784107 A NO 784107A NO 152732 B NO152732 B NO 152732B
- Authority
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- Norway
- Prior art keywords
- activated carbon
- gases
- impregnated
- air
- removal
- Prior art date
Links
- 239000007789 gas Substances 0.000 title claims description 13
- 230000003197 catalytic effect Effects 0.000 title description 2
- 239000003245 coal Substances 0.000 title 1
- 231100001261 hazardous Toxicity 0.000 title 1
- 239000000126 substance Substances 0.000 title 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 102
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Chemical group [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 claims description 30
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 claims description 13
- 239000011630 iodine Substances 0.000 claims description 13
- 229910052740 iodine Inorganic materials 0.000 claims description 13
- 150000001845 chromium compounds Chemical class 0.000 claims description 12
- 150000003839 salts Chemical class 0.000 claims description 11
- 230000002285 radioactive effect Effects 0.000 claims description 10
- 229910001385 heavy metal Chemical class 0.000 claims description 9
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical class [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 claims description 8
- 150000001875 compounds Chemical class 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 238000005470 impregnation Methods 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 230000003647 oxidation Effects 0.000 claims description 5
- 238000007254 oxidation reaction Methods 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 4
- 229910001516 alkali metal iodide Inorganic materials 0.000 claims description 4
- PNDPGZBMCMUPRI-UHFFFAOYSA-N iodine Chemical compound II PNDPGZBMCMUPRI-UHFFFAOYSA-N 0.000 claims description 4
- 230000002378 acidificating effect Effects 0.000 claims description 3
- 229910052729 chemical element Inorganic materials 0.000 claims description 2
- 229910017052 cobalt Inorganic materials 0.000 claims description 2
- 239000010941 cobalt Substances 0.000 claims description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 230000000737 periodic effect Effects 0.000 claims description 2
- 229910052709 silver Inorganic materials 0.000 claims description 2
- 239000004332 silver Substances 0.000 claims description 2
- 239000003513 alkali Substances 0.000 description 5
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- 239000011651 chromium Substances 0.000 description 3
- 150000001879 copper Chemical class 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000029058 respiratory gaseous exchange Effects 0.000 description 3
- 238000002791 soaking Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- LELOWRISYMNNSU-UHFFFAOYSA-N hydrogen cyanide Chemical compound N#C LELOWRISYMNNSU-UHFFFAOYSA-N 0.000 description 2
- INQOMBQAUSQDDS-UHFFFAOYSA-N iodomethane Chemical compound IC INQOMBQAUSQDDS-UHFFFAOYSA-N 0.000 description 2
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 description 2
- PMJNEQWWZRSFCE-UHFFFAOYSA-N 3-ethoxy-3-oxo-2-(thiophen-2-ylmethyl)propanoic acid Chemical compound CCOC(=O)C(C(O)=O)CC1=CC=CS1 PMJNEQWWZRSFCE-UHFFFAOYSA-N 0.000 description 1
- 239000005749 Copper compound Substances 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- LRFQSNDOLFTQCR-UHFFFAOYSA-M [O-][Cr](O)(=O)=O.N.[Cu+] Chemical compound [O-][Cr](O)(=O)=O.N.[Cu+] LRFQSNDOLFTQCR-UHFFFAOYSA-M 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000004887 air purification Methods 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 239000007900 aqueous suspension Substances 0.000 description 1
- 229940116318 copper carbonate Drugs 0.000 description 1
- 150000001880 copper compounds Chemical class 0.000 description 1
- GEZOTWYUIKXWOA-UHFFFAOYSA-L copper;carbonate Chemical compound [Cu+2].[O-]C([O-])=O GEZOTWYUIKXWOA-UHFFFAOYSA-L 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000029142 excretion Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 238000005025 nuclear technology Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000000241 respiratory effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910001961 silver nitrate Inorganic materials 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
- G21F9/02—Treating gases
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D9/00—Composition of chemical substances for use in breathing apparatus
-
- 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
- B01D53/02—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 by adsorption, e.g. preparative gas chromatography
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/312—Preparation
- C01B32/342—Preparation characterised by non-gaseous activating agents
- C01B32/348—Metallic compounds
Description
Oppfinnelsen vedrører impregnert aktivkull for anvendelse som luftrensemiddel, og fremgangsmåte til dets fremstilling. The invention relates to impregnated activated carbon for use as an air purifier, and a method for its production.
Aktivkull benyttes på ulike måter for rensing av pusteluft, eksempelvis i av mennesker anvendte pustebeskyttelsesfiltre eller i filtre i ventilasjonsanlegg. Activated carbon is used in various ways to purify breathing air, for example in respiratory protection filters used by people or in filters in ventilation systems.
Det er kjent å impregnere aktivkull med tungmetallsalter. Særlig er det kjent å impregnere aktivkull med koppersalter, kromater og sølvnitrat. Disse impregneringer tjener til å øke aktivkull-ets opptaksevne, særlig overfor blåsyre og klorcyan (tysk patent-skrift nr. 10 87 579). It is known to impregnate activated carbon with heavy metal salts. In particular, it is known to impregnate activated carbon with copper salts, chromates and silver nitrate. These impregnations serve to increase the absorption capacity of the activated carbon, particularly against hydrocyanic acid and cyanide (German patent document no. 10 87 579).
Det er også kjent aktivkull som er impregnert med kaliumjodid eller kaliumjodid plus jod. Disse aktivkull anvendes for binding av sure gasser, såsom særlig svovelvannstoff, og også til binding av kvikksølvdamper. Activated charcoal is also known which is impregnated with potassium iodide or potassium iodide plus iodine. These activated carbons are used for binding acidic gases, such as hydrogen sulphide in particular, and also for binding mercury vapour.
Det er også kjent aktivkull som er impregnert med kaliumjodid eller kaliumjodid plus jod for absorbsjon av radioaktiv jod og dets forbindelser i forbindelse med luftrensing i kjerne-teknisk anlegg. Activated carbon is also known which is impregnated with potassium iodide or potassium iodide plus iodine for absorption of radioactive iodine and its compounds in connection with air purification in nuclear engineering facilities.
Når luft skal renses for radioaktivt jod og /eller for forbind-eiser som inneholder radioaktivt jod, sure gasser eller katalytisk spaltbare eller skadelige gasser som skal bindes kjemisk, er det ut i fra dagens teknikk nødvendig å innkople flere ulike eller ikke impregnerte aktivkull fra hverandre, fylt i When air is to be purified from radioactive iodine and/or from compound ices containing radioactive iodine, acid gases or catalytically decomposable or harmful gases that are to be bound chemically, it is necessary, based on current technology, to connect several different or non-impregnated activated carbons from each other , filled in
luftfiltre, i luftstrømmen, slik at de angjeldende skadelige gasser trekkes ut av luften etter hverandre i det ene eller andre aktivkullsjikt. Dette krever en innsats av en stor aktivkullmengde, hvorved filtrene blir store og plasskrevende. Materialforbruket for filtrene såvel som fremstillingsomkost-ningene blir høye. Plasskrevende og store filtre er vanskelig air filters, in the air flow, so that the relevant harmful gases are extracted from the air one after the other in one or the other layer of activated carbon. This requires the use of a large amount of activated carbon, whereby the filters become large and take up space. The material consumption for the filters as well as the manufacturing costs will be high. Space-consuming and large filters are difficult
å håndtere og påvirker bevegelsesfriheten til de personer som bærer slik filtre. to handle and influence the freedom of movement of the people who wear such filters.
Foreliggende oppfinnelse tar sikte på å tilveiebringe et aktivkull som kan anvendes såvel for rensing av luft for radioaktivt jod og dets forbindelser som for rensing av luft for katalytisk spaltbare gasser eller gasser som må bindes kjemisk, slik at man derved kan redusere den anvendte aktivkullmengde. The present invention aims to provide an activated carbon that can be used both for purifying air for radioactive iodine and its compounds and for purifying air for catalytically decomposable gases or gases that must be chemically bound, so that the amount of activated carbon used can thereby be reduced.
Oppfinnelsen vedrører således impregnert aktivkull for fjerning av sure, katalytisk nedbrytbare skadelige gasser og gasser som skal bindes kjemisk, fra luft, idet det aktive kull er forsynt med impregneringsmiddel i form av en eller flere kromforbindelser og tungmetallsalter, og det som kjennetegner aktivkullet ifølge oppfinnelsen er at det for samtidig opptagelse av gassformet radioaktivt jod eller en gassformet forbindelse som inneholder radioaktivt jod, dessuten er impregnert med alkalimetalljodid. The invention thus relates to impregnated activated carbon for the removal of acidic, catalytically decomposable harmful gases and gases that must be bound chemically from air, the activated carbon being provided with an impregnating agent in the form of one or more chromium compounds and heavy metal salts, and what characterizes the activated carbon according to the invention is that for the simultaneous absorption of gaseous radioactive iodine or a gaseous compound containing radioactive iodine, it is also impregnated with alkali metal iodide.
Fordelaktig er alkalimetalljodidet kaliumjodid. Advantageously, the alkali metal iodide is potassium iodide.
Det aktive kull kan dessuten være impregnert med jod. Hensikts-messig består tungmetallsaltene av salter av ett eller flere elementer i den første sidegruppen til gruppe VIII (jern, kobolt, nikkel) og/eller sidegruppen til gruppe I (kopper, sølv) i det periodiske system for de kjente kjemiske elementer, særlig kopper. The activated charcoal can also be impregnated with iodine. Appropriately, the heavy metal salts consist of salts of one or more elements in the first side group of group VIII (iron, cobalt, nickel) and/or the side group of group I (copper, silver) in the periodic table for the known chemical elements, especially copper .
Kromforbindelsene kan fordelaktig bestå av kromater og/eller dikromater, Istedet for kromater eller sammen med disse kan kromforbindelser være av et lavere oksydasjonstrinns for impregnering . The chromium compounds can advantageously consist of chromates and/or dichromates. Instead of chromates or together with these, chromium compounds can be of a lower oxidation step for impregnation.
Oppfinnelsen medfører den fordel at man samtidig som man sparer aktivkull oppnår et impregnert aktivkull som har den nødvendige bindeevne for de skadelige gasser. Det nye aktivkull er fremstilt på enkel måte og kan fylles i pustebeskyttelsesfiltre. Man kan derved bibeholde den ønskede lave vekt for pustebeskyttelsesfiltrene eller andre filtre. The invention entails the advantage that, while saving activated carbon, you obtain an impregnated activated carbon that has the necessary binding capacity for the harmful gases. The new activated charcoal is produced in a simple way and can be filled in breathing protection filters. One can thereby maintain the desired low weight for the breathing protection filters or other filters.
For fremstilling av aktivkull av den nevnte type kan aktivkullet først trenkes med en vandig løsning av tungmetallsaltene og kromforbindelsene og deretter tørkes, hvoretter aktivkullet trenkes med en vandig løsning av alkalijodid og tørkes. Som kromforbindelser kan kromater benyttes. I tillegg til kromater eller også istedet for disse kan det anvendes kromforbindelser av et lavere oksydasjonstrinn av krommet. Denne fremgangsmåte er enkel å gjennomføre. For the production of activated carbon of the aforementioned type, the activated carbon can first be soaked with an aqueous solution of the heavy metal salts and chromium compounds and then dried, after which the activated carbon is soaked with an aqueous solution of alkali iodide and dried. Chromates can be used as chromium compounds. In addition to chromates or instead of these, chromium compounds of a lower oxidation state of the chromium can be used. This procedure is easy to implement.
Når det som tungmetallsalt er anvendt et koppersalt er det hen-siktsmessig å velge en ammoniakkholdig løsning for det første trinn, for derved å øke koppersaltenes oppløsbarhet ved siden av kromater. When a copper salt is used as the heavy metal salt, it is appropriate to choose an ammonia-containing solution for the first step, thereby increasing the solubility of the copper salts next to chromates.
Aktivkullet kan også være fremstilt ved at aktivkullet først impregneres med en vandig suspensjon av en forbindelse av kopper med krom av et lavere oksydasjonstrinn, hvilken forbindelse er fremstilt ved oppvarming av kopper-ammonium-kromat, hvoretter aktivkullet er trenkt med en vandig oppløsning av alkalijodid og tørkes. The activated carbon can also be produced by first impregnating the activated carbon with an aqueous suspension of a compound of copper with chromium of a lower oxidation stage, which compound is produced by heating copper-ammonium chromate, after which the activated carbon is soaked with an aqueous solution of alkali iodide and be dried.
Disse impregneringer kan ha funnet sted i omvendt rekkefølge. These impregnations may have taken place in reverse order.
Det er også mulig å anvende det beskrevne impregneringsmiddel sammen med alkalijodidet i ett eneste impregneringstrinn. It is also possible to use the described impregnation agent together with the alkali iodide in a single impregnation step.
I samtlige tilfeller er impregneringsmiddel fordelaktig kaliumjodid eller kaliumjodid pluss jod. In all cases, the impregnating agent is advantageously potassium iodide or potassium iodide plus iodine.
For å bedre impregneringsmiddelets inntrengning i aktivkullet kan aktivkullet holdes under undertrykk før en eller flere av trenkningene. For samme formål kan også trenkingen i ett eller flere trinn skje under undertrykk. To improve the penetration of the impregnating agent into the activated carbon, the activated carbon can be kept under negative pressure before one or more of the soaks. For the same purpose, the extraction in one or more stages can also take place under negative pressure.
I det første trenkningstrinn, i hvilket aktivkullet først trenkes med en vandig oppløsning av tungmetallsalter og kromforbindelser og deretter tørkes, kan tørkingen skje ved en øket temperatur opp til ca. 200°C. Dette gjelder også når oppløsningen av tungmetallsalter inneholder kromforbindelser av et lavere oksydasjonstrinn. In the first soaking step, in which the activated carbon is first soaked with an aqueous solution of heavy metal salts and chromium compounds and then dried, the drying can take place at an increased temperature of up to approx. 200°C. This also applies when the solution of heavy metal salts contains chromium compounds of a lower oxidation state.
Trekningstrinnet, i hvilket aktivkullet i tillegg impregneres med alkalijodid, kan likeledes tørkes ved øket temperatur opp til ca. 100°C. Det samme gjelder dersom man bare gjennomfører et trenkningstrinn, i hvilket trenkningen foregår samtidig med alkalijodid og kromitt. The drawing step, in which the activated carbon is additionally impregnated with alkali iodide, can likewise be dried at an increased temperature up to approx. 100°C. The same applies if you only carry out a soaking step, in which soaking takes place simultaneously with alkali iodide and chromite.
For å få en skånende behandling av aktivkullet kan tørkingen skje under undertrykk. In order to have a gentle treatment of the activated carbon, the drying can take place under negative pressure.
Utførelseseksempel Execution example
Granulert aktivkull med en kornstørrelse på ca. 1 mm evakueres til 10 mbar og trenkes så med en ammonialkalisk løsning av kopperkarbonat og ammoniumkromat av en slik kosentrasjon at kopperandelen til de til aktivkullet tilførte kopperforbindelser utgjør ca. 6 vekt-%, mens kromandelen til de tilførte kromforbindelser utgjør ca. 2 vekt-% av det ferdige aktivkull. Det trenkede aktivkull tørkes ved en temperatur på 150°C under vakuum, helt til et trykk på 5 mbar er oppnådd. Det på denne måten impregnerte aktivkull kjøles til romtemperatur og trenkes likeledes under vakuum med en oppløsning av kaliumjodid pluss jod, idet konsentrasjonen i denne oppløsning er innstilt slik at det impregnerte aktivkull i slutt-tilstanden inneholder en kaliumjodidandel på ca. 1,5 vekt-% og en jodandel på ca. 1 vekt-%, med hensyn på vekten til det ferdige aktivkull. Det for andre gang trenkede aktivkull tørkes under vakuum ved ca. 100°C, helt til et trykk på 5 mbar er nådd. Granulated activated carbon with a grain size of approx. 1 mm is evacuated to 10 mbar and then soaked with an ammonia-alkaline solution of copper carbonate and ammonium chromate of such a co-concentration that the copper proportion of the copper compounds added to the activated carbon amounts to approx. 6% by weight, while the chromium proportion of the added chromium compounds amounts to approx. 2% by weight of the finished activated carbon. The soaked activated carbon is dried at a temperature of 150°C under vacuum, until a pressure of 5 mbar is achieved. The activated carbon impregnated in this way is cooled to room temperature and likewise soaked under vacuum with a solution of potassium iodide plus iodine, the concentration in this solution being set so that the impregnated activated carbon in the final state contains a potassium iodide proportion of approx. 1.5% by weight and an iodine proportion of approx. 1% by weight, with regard to the weight of the finished activated carbon. The activated carbon soaked for the second time is dried under vacuum at approx. 100°C, until a pressure of 5 mbar is reached.
Det på denne måten impregnerte aktivkull har utmerkede kataly-tiske og kjemosorptive egenskaper, med bibehold av en god fysi-kalsk adsorbsjonsevne. I tillegg oppnår aktivkullet meget gode The activated carbon impregnated in this way has excellent catalytic and chemosorptive properties, while retaining a good physical adsorption capacity. In addition, activated carbon achieves very good results
utskillingsgrader for radiaktivt jod av luft, også når jod fore-finnes i meget flyktige forbindelser, såsom metyljodid. Det excretion rates for radioactive iodine from air, also when iodine is present in highly volatile compounds, such as methyl iodide. The
ifølge dette utførelseseksempel impregnerte aktivkull har en according to this embodiment, impregnated activated carbon has a
utskillingseffekt, målt ved hjelp av den i kjerneteknikken vanlige prøvemetodikk, på 99,9996% overfor radioaktivt metyljodid. Aktivkullet har en opptaksevne for klorcyan på 8 g pr. 100 g aktivkull. separation effect, measured using the test methodology common in nuclear technology, of 99.9996% against radioactive methyl iodide. The activated carbon has an absorption capacity for cyanide of 8 g per 100 g of activated charcoal.
Claims (6)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2757576A DE2757576C2 (en) | 1977-12-23 | 1977-12-23 | Impregnated activated carbon to remove acidic, catalytically decomposable and chemically bound pollutants from the air |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| NO784107L NO784107L (en) | 1979-06-26 |
| NO152732B true NO152732B (en) | 1985-08-05 |
| NO152732C NO152732C (en) | 1985-11-13 |
Family
ID=6027038
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO784107A NO152732C (en) | 1977-12-23 | 1978-12-06 | IMPROVED ACTIVE COAL FOR REMOVAL OF ACID, CATALYTIC DEGRADABLE HAZARDOUS GASES AND GASES TO BE CHEMICAL BONDED FROM AIR. |
Country Status (6)
| Country | Link |
|---|---|
| CH (1) | CH645867A5 (en) |
| DE (1) | DE2757576C2 (en) |
| FR (1) | FR2412337A1 (en) |
| GB (1) | GB2010794B (en) |
| NO (1) | NO152732C (en) |
| SE (1) | SE433311B (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3013256C2 (en) * | 1980-04-03 | 1988-06-16 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München | Process for the production of highly specific activated carbon, the carbon obtained in the process and its use |
| DE3231717C2 (en) * | 1982-08-26 | 1986-04-24 | Drägerwerk AG, 2400 Lübeck | Air purifiers impregnated and for use in filters |
| FR2550947B1 (en) * | 1983-08-26 | 1987-10-23 | Gauchard Fernand | IMPROVEMENTS ON PROTECTIVE FILTERS AGAINST INHALABLE INCAPACITANTS AND TOXICS AND SIMILAR AGGRESSIVE SUBSTANCES |
| DE3341712A1 (en) * | 1983-11-18 | 1985-05-30 | Drägerwerk AG, 2400 Lübeck | AIR CLEANING AGENTS FOR USE IN AIR FILTERS |
| DE3819356A1 (en) * | 1988-06-07 | 1989-12-14 | Metallgesellschaft Ag | METHOD FOR REMOVING SULFUR HYDROGEN FROM A GAS MIXTURE BY MEANS OF ACTIVE CARBON |
| CA2037438A1 (en) * | 1991-03-01 | 1992-09-02 | Jack G. Pagotto | Low chromium active charcoal |
| FR2764518B1 (en) * | 1997-06-17 | 1999-09-03 | App De Protection Soc Nouv | FILLING FOR FILTERS FOR THE PROTECTION OF THE RESPIRATORY TRACT AND FILTERS COMPRISING FILLINGS |
| FR2777381B1 (en) * | 1998-04-08 | 2002-11-08 | Jean Francis Hamard | PROCESS FOR THE PHYSICOCHEMICAL FILTRATION OF AEROSOLS, GASES, AND RADIOACTIVE VAPORS CONTAINED IN CONTAMINATED AIR |
| DE19852705A1 (en) * | 1998-11-16 | 2000-05-25 | Atmos Medizintechnik Gmbh & Co | Suction device, which aspirates airborne or airborne waste products from a surgical treatment with a current-driven surgical instrument, in particular with a laser scalpel, with a filter unit |
| US7004990B2 (en) | 2003-06-26 | 2006-02-28 | 3M Innovative Properties Company | Broad spectrum filter system including tungsten-based impregnant and being useful for filtering contaminants from air or other gases |
| CN102170948B (en) | 2008-09-02 | 2014-09-17 | 3M创新有限公司 | Ammonia-free gaseous air filter |
| EP3632525A1 (en) * | 2018-10-02 | 2020-04-08 | Evonik Fibres GmbH | A device and a process for separating methane from a gas mixture containing methane, carbon dioxide and hydrogen sulfide |
| CN110433807A (en) * | 2019-07-23 | 2019-11-12 | 山西新华化工有限责任公司 | It is a kind of to carry Co catalysts material and preparation without ammono-system for protect cyanogen chloride |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE976820C (en) * | 1953-10-22 | 1964-05-06 | Auergesellschaft Gmbh | Process for the production of a filter material used to trap hydrogen cyanide and its halogen derivatives from the air we breathe |
| DE1087579B (en) * | 1958-08-01 | 1960-08-25 | Draegerwerk Ag | Process for impregnation of activated carbon with heavy metal salts |
| GB1124116A (en) * | 1965-07-28 | 1968-08-21 | Atomic Energy Authority Uk | Improvements in or relating to charcoal for use in trapping systems |
| US3764561A (en) * | 1971-03-09 | 1973-10-09 | Takeda Chemical Industries Ltd | Activated carbon from admixture of coking coal and inorganic potassium salts |
| DE2114197A1 (en) * | 1971-03-24 | 1972-09-28 | Draegerwerk Ag | Respiratory filter absorbent compsn - for protection from hydrogen sulphide comprising iodine-impregnated active carbon |
-
1977
- 1977-12-23 DE DE2757576A patent/DE2757576C2/en not_active Expired
-
1978
- 1978-12-06 NO NO784107A patent/NO152732C/en unknown
- 1978-12-15 FR FR7836062A patent/FR2412337A1/en active Granted
- 1978-12-20 GB GB7849231A patent/GB2010794B/en not_active Expired
- 1978-12-20 CH CH1296778A patent/CH645867A5/en not_active IP Right Cessation
- 1978-12-21 SE SE7813182A patent/SE433311B/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| CH645867A5 (en) | 1984-10-31 |
| FR2412337A1 (en) | 1979-07-20 |
| NO152732C (en) | 1985-11-13 |
| DE2757576C2 (en) | 1984-03-08 |
| GB2010794A (en) | 1979-07-04 |
| DE2757576A1 (en) | 1979-06-28 |
| GB2010794B (en) | 1982-06-30 |
| FR2412337B1 (en) | 1982-10-29 |
| SE7813182L (en) | 1979-06-24 |
| NO784107L (en) | 1979-06-26 |
| SE433311B (en) | 1984-05-21 |
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