SU469234A3 - Catalyst for the oxidation of harmful gases and vapors of organic origin - Google Patents
Catalyst for the oxidation of harmful gases and vapors of organic originInfo
- Publication number
- SU469234A3 SU469234A3 SU1960946A SU1960946A SU469234A3 SU 469234 A3 SU469234 A3 SU 469234A3 SU 1960946 A SU1960946 A SU 1960946A SU 1960946 A SU1960946 A SU 1960946A SU 469234 A3 SU469234 A3 SU 469234A3
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- catalyst
- vapors
- oxidation
- harmful gases
- organic origin
- Prior art date
Links
- 239000007789 gas Substances 0.000 title description 8
- 239000003054 catalyst Substances 0.000 title description 4
- 230000003647 oxidation Effects 0.000 title description 2
- 238000007254 oxidation reaction Methods 0.000 title description 2
- 239000000203 mixture Substances 0.000 description 7
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 5
- 239000004568 cement Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 150000003739 xylenols Chemical class 0.000 description 5
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical class OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 4
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 230000003197 catalytic effect Effects 0.000 description 4
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 4
- 229910052748 manganese Inorganic materials 0.000 description 4
- 239000011572 manganese Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 150000005323 carbonate salts Chemical class 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 2
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- YJESALUAHUVISI-UHFFFAOYSA-N 3,5-dimethylhexan-2-one Chemical compound CC(C)CC(C)C(C)=O YJESALUAHUVISI-UHFFFAOYSA-N 0.000 description 1
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 1
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 description 1
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 1
- 239000005751 Copper oxide Substances 0.000 description 1
- 229910021543 Nickel dioxide Inorganic materials 0.000 description 1
- 235000012538 ammonium bicarbonate Nutrition 0.000 description 1
- 239000001099 ammonium carbonate Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000012876 carrier material Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910000431 copper oxide Inorganic materials 0.000 description 1
- YMBOSYHCYOYHLF-UHFFFAOYSA-L copper;hydrogen carbonate Chemical compound [Cu+2].OC([O-])=O.OC([O-])=O YMBOSYHCYOYHLF-UHFFFAOYSA-L 0.000 description 1
- 150000001896 cresols Chemical class 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- -1 ethyl glycol acetates Chemical class 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 1
- IYFXESRMJKRSNZ-UHFFFAOYSA-L hydrogen carbonate;nickel(2+) Chemical compound [Ni+2].OC([O-])=O.OC([O-])=O IYFXESRMJKRSNZ-UHFFFAOYSA-L 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 229910000480 nickel oxide Inorganic materials 0.000 description 1
- ZULUUIKRFGGGTL-UHFFFAOYSA-L nickel(ii) carbonate Chemical class [Ni+2].[O-]C([O-])=O ZULUUIKRFGGGTL-UHFFFAOYSA-L 0.000 description 1
- 231100001160 nonlethal Toxicity 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000012047 saturated solution Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000000007 visual effect Effects 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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
-
- 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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8668—Removing organic compounds not provided for in B01D53/8603 - B01D53/8665
-
- 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
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/944—Simultaneously removing carbon monoxide, hydrocarbons or carbon making use of oxidation catalysts
-
- 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
- B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/84—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
-
- 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
- B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/84—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/85—Chromium, molybdenum or tungsten
-
- 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
- B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/84—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/889—Manganese, technetium or rhenium
- B01J23/8892—Manganese
-
- 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
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/0009—Use of binding agents; Moulding; Pressing; Powdering; Granulating; Addition of materials ameliorating the mechanical properties of the product catalyst
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Combustion & Propulsion (AREA)
- Catalysts (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Description
с путем оожига с доступом воздуха при 300°С смеси соответствующих металлических углекислых солей или гидрокарбонатов, содержащей око.чо 80% углекислой соли двухвалеитиого ivtapraiiina, 10% гидрокарбоната меди п 10% гидрокарбоната никел . В результате обжига некоторое количество остаточной углекислой соли двухвалентного марганца остаетс нетронутым, что дает особый физический вид двуокиси марганца в виде элементарных зерен размером до 1 мк в виде кристаллов, сохран ющих ромбоэдрическую структуру образующей углекислой соли закиси марганца.(c) A mixture of the corresponding metal carbonate salts or bicarbonates containing about 80% of carbonate salt of two-ivolite ivtapraiiina, 10% copper bicarbonate and 10% nickel bicarbonate. As a result of roasting, some amount of the residual carbonate of divalent manganese remains intact, which gives a special physical appearance of manganese dioxide in the form of elemental grains up to 1 micron in the form of crystals that preserve the rhombohedral structure forming the carbonate of manganese oxide.
В процессе окисного разложени вредных или з.1ово1гиых газов и наров органнческого ироисхождени нри темнературах выше 300°С оптимальный состав каталитического нродукта согласио изобретению вл етс следуюHUIM . %::In the process of oxide decomposition of harmful or third gases and organic matter origin in temperatures above 300 ° C, the optimal composition of the catalytic product according to the invention is as follows. % ::
Окись марганца80Manganese oxide80
Окись меди10Copper oxide10
Окись иикел 10Nickel oxide 10
Цемент или огнеуиорный материал на основе глины.Cement or clay based fire material.
Эти окиси согласно изобретеи но иолучаютс иутем реакции обжига с достуном воздуха при 600°С смеси соответствующих металлических уг,1ек 1слых солей и гидрокарбонатов, содержащей около 80% углекислой соли двухвалентного марганца, 10% гидрокарбоната медн и 10% гндрокарбоната никел . Эта темиерат )фа обжига обеспечивает полное преобразование углекислых солей (карбонатов) и гпдрокарбонатов смеси в активные окислы в составе ко11ечио1-о каталитического продукта. These oxides are invented in accordance with the invention and are roasted with air at 600 ° C with a mixture of the corresponding metal carbon, 1 c 1 salt and bicarbonate containing about 80% carbonate of divalent manganese, 10% bicarbonate of nickel and 10% carbonate. This terarat of the firing process ensures the complete conversion of carbonate salts (carbonates) and gpdrocarbonate mixtures into active oxides in the composition of a cochio1-o catalytic product.
Такие каталитические иродукты енособствуют экономичному окисиому разлол ению таких токс11чи1)1х и зловоиных органнческих иромышленпых отходов, как цикличные и гетероцикличмые отходы, наиример ниридин и его гомолот , иа11)илгер метнлнпрролидои, сернистые гетероц 1кличные нродукты, наход щиес в качестве посто нно ирисутствующих иримесеп в растворах, иапрпмер крезолы, ксиленолы, метилизобутилацетон , ацетат бутила, ацетаты этилгликол н т. д.Such catalyspasti , iprrmer cresols, xylenols, methyl isobutylacetone, butyl acetate, ethyl glycol acetates, etc.
Эффективность этого разложеии можег быть констатироваиа ио меньшей мере трем снособами. Первый состоит в нсчезновеппи запаха обрабатываемых наров. Это средство вл стс чрезвычайно эффективным, поскольку такие вещества, как известно, имеют невыносимый запах, даже если нх содержание в газах достигает несколько миллионных долей на кубический метр.The effectiveness of this decomposition can be determined by at least three ways. The first is to treat the smell of processed bunks. This agent is extremely effective, since such substances are known to have an unbearable odor, even if their content in gases reaches a few ppm per cubic meter.
BTopoii способ состоит в количествепнои оценке возможных остаточных колнчеств этих веществ ирн помощи трубки Драгера. При иомощи этого способа осуществл етс визуальный контроль эффективности реакции с помондью окрашенных реактивов.The BTopoii method consists in quantifying the possible residual properties of these substances using the Drager tube. With the aid of this method, a visual control is carried out of the effectiveness of the reaction with a pond of colored reagents.
Наконец, третий снособ состоит в хроматограф Н1 газовой фазы, осуществл емой на обрабатываемом газе до и иосле его прохожде 1и через катализатор.Finally, the third removal method consists in a gas phase chromatograph H1 carried out on the treated gas before and after passing through the catalyst.
Газ с содержанием ксиленола 6 г/м (обычное содержание нечных газов), получением ксиленола 6 г/м (обычное содержание печных газов), нолученный распыленнем воздуха в ксиленоле нрн обычной тем-нературе н подвергнутый обработке Каталитического окислени «а катализаторе, получен1ном согласно примерам 1 и 2, но лишенным ннкел . тер ет ксиленол , начина с 220°С, тогда как при том же катализаторе, но содержащем никель, эта температура снижаетс до 180°С.A xylenol 6 g / m gas (normal content of non-lethal gases), to obtain xylenol 6 g / m (normal content of kiln gases), but obtained by spraying air in xylenol nrn at a typical temperature and treated with catalytic oxidation obtained according to examples 1 and 2, but devoid of nnkel. it loses xylenol, starting from 220 ° C, whereas with the same catalyst, but containing nickel, this temperature drops to 180 ° C.
11одобиые оиыты, нриведенные с таким же примерно содержанием пиридина и лгетилпирролидона , ирнвелн к совершенно таким же рез}льтатам .11 similar extracts, given with approximately the same content of pyridine and lethylpyrrolidone, are equivalent to exactly the same result.
Пример 1. Смешивают насыщенные водные растворы:Example 1. Mixed saturated aqueous solutions:
MnCl2-4H,O949MnCl2-4H, O949
CuCl2-2H2041CuCl2-2H2041
NiCb-GHoO194NiCb-GHoO194
н выливают эту смесь в насыщенный раствор (NH4)HCO3 - 951 г или с избытком 5% бикарбоната аммони . Он осаждает с.месь гндрокарбонатов марганца, меди и никел . К ней добавл ют 400 г цемента или огнеупорного материала на базе глины, превраща ее в более или менее густую иасту, в зависимости от требований к форме, котора будет придана конечному каталитическому продукту. Легко текуща иаста облегчает пропитывание ченсты.х или полотнообразных несущих материалов. Средн консистенци позвол ет наносить пасту на .металлические .ИЛ1 огнеупорные носители , н.меющие форму пластинки, рещетки ила стержн , с которымн она легко сцепл етс . Густа иаста позвол ет отливать илн выдавливать из нее любые желаемые геометрнческие формы: днски, кирипчи, гранулы, палочки , кольца. После соединени с цементом пли огнеупорным матерналом на основе глнны отформованную таким образом смесь с несущим основанием или без него подвергают обжигу в вентилируемой сушильной камере или печи нри температуре ЗООС, дл постепенного осуществлени на месте реакций следующего типа , превращающих в окислы поддерживаемые цеме1ггом карбонаты:n Pour this mixture into a saturated solution (NH4) HCO3 - 951 g or with an excess of 5% ammonium bicarbonate. It precipitates the content of monomer, manganese, copper and nickel carbonates. 400 g of cement or clay-based refractory material are added to it, turning it into a more or less thick jasta, depending on the form requirements that will be imparted to the final catalytic product. Easily flowing jasta facilitates the infiltration of chensty.x or linen-like carrier materials. The average consistency allows the paste to be applied to metal. IL1 refractory carriers, such as plate-shaped, rods of sludge rod, with which it easily adheres. The thick jasta allows you to cast or extrude any desired geometric shapes from it: dns, kiripchi, granules, sticks, rings. After combining with cement or a refractory base material based on the mixture formed in such a way, with or without a carrier base, they are calcined in a ventilated drying chamber or furnace at a temperature of EPO, for the following type of oxidizing cements that are supported by cement to be converted into oxides:
1one
-MnOo-fCOv -MnOo-fCOv
СОзМп+ -,, 02СОзСи , Си (ОН) 2- 2СиО+С02+Н2О COaNi, N4(OH)2+2402 NiO+NiO2+SOzMp + - ,, 02SO3C, Cu (OH) 2-2CiO + CO2 + H2O COaNi, N4 (OH) 2 + 2402 NiO + NiO2 +
+ +
Эта онерацп обжига с доступным воздухом:This hot air firing is:
СОзМп+ -о Ог- МпО2+СО2SOzMp + -o Og-MpO2 + CO2
достигает около 60% по отношению к введенному количеству марганца.reaches about 60% in relation to the amount of manganese added.
Полученный таким образом катализатор содержит, %: окись марганца 55, карбонат двухвалентного марганца 30, окись меди 5, окись ннкел 10, прочно удерживаемых на меThe catalyst thus obtained contains,%: manganese oxide 55, carbonate divalent manganese 30, copper oxide 5, oxide nankel 10, firmly held on the metal
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7043189A FR2116638A5 (en) | 1970-12-01 | 1970-12-01 |
Publications (1)
Publication Number | Publication Date |
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SU469234A3 true SU469234A3 (en) | 1975-04-30 |
Family
ID=9065032
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU1719271A SU413657A3 (en) | 1970-12-01 | 1971-12-01 | |
SU1960946A SU469234A3 (en) | 1970-12-01 | 1971-12-01 | Catalyst for the oxidation of harmful gases and vapors of organic origin |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU1719271A SU413657A3 (en) | 1970-12-01 | 1971-12-01 |
Country Status (3)
Country | Link |
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IT (1) | IT946117B (en) |
SE (1) | SE386378B (en) |
SU (2) | SU413657A3 (en) |
-
1971
- 1971-11-30 SE SE7115351A patent/SE386378B/en unknown
- 1971-11-30 IT IT31807/71A patent/IT946117B/en active
- 1971-12-01 SU SU1719271A patent/SU413657A3/ru active
- 1971-12-01 SU SU1960946A patent/SU469234A3/en active
Also Published As
Publication number | Publication date |
---|---|
IT946117B (en) | 1973-05-21 |
SE386378B (en) | 1976-08-09 |
SU413657A3 (en) | 1974-01-30 |
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