BE901027A - Produit d'epuration de l'air pour filtres a air. - Google Patents
Produit d'epuration de l'air pour filtres a air.Info
- Publication number
- BE901027A BE901027A BE0/213984A BE213984A BE901027A BE 901027 A BE901027 A BE 901027A BE 0/213984 A BE0/213984 A BE 0/213984A BE 213984 A BE213984 A BE 213984A BE 901027 A BE901027 A BE 901027A
- Authority
- BE
- Belgium
- Prior art keywords
- air
- cleaning product
- filters
- air cleaning
- air filters
- Prior art date
Links
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
- B01D53/02—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
-
- 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
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/0203—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04
- B01J20/024—Compounds of Zn, Cd, Hg
- B01J20/0244—Compounds of Zn
-
- 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
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/0203—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04
- B01J20/027—Compounds of F, Cl, Br, I
-
- 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
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
-
- 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
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
-
- 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
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/3078—Thermal treatment, e.g. calcining or pyrolizing
-
- 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
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
- B01J20/3202—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the carrier, support or substrate used for impregnation or coating
- B01J20/3204—Inorganic carriers, supports or substrates
-
- 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
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
- B01J20/3231—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the coating or impregnating layer
- B01J20/3234—Inorganic material layers
- B01J20/3236—Inorganic material layers containing metal, other than zeolites, e.g. oxides, hydroxides, sulphides or salts
Landscapes
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Filtering Materials (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
- Treating Waste Gases (AREA)
Abstract
Ce produit d'épuration de l'air est destiné à etre utilisé dans les filtres à base de support poreuse contenant de l'oxyde de zinc. Il contient, en outre, un sel d'un métal formant des amines.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3341712A DE3341712C2 (de) | 1983-11-18 | 1983-11-18 | Luftreinigungsmittel zur Verwendung in Luftfiltern |
Publications (1)
Publication Number | Publication Date |
---|---|
BE901027A true BE901027A (fr) | 1985-03-01 |
Family
ID=6214649
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE0/213984A BE901027A (fr) | 1983-11-18 | 1984-11-09 | Produit d'epuration de l'air pour filtres a air. |
Country Status (9)
Country | Link |
---|---|
US (1) | US4677096A (fr) |
JP (1) | JPS60118235A (fr) |
AT (1) | AT390389B (fr) |
BE (1) | BE901027A (fr) |
CH (1) | CH663160A5 (fr) |
DE (1) | DE3341712C2 (fr) |
FR (1) | FR2555071B1 (fr) |
GB (1) | GB2150127B (fr) |
NL (1) | NL192668C (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4677096A (en) * | 1983-11-18 | 1987-06-30 | Dragerwerk A.G. | Air cleaning material for use in air filters |
Families Citing this family (39)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5110586A (en) * | 1987-04-02 | 1992-05-05 | Titan Kogyo Kabushiki Kaisha | White colored deodorizer and process for producing the same |
US5013335A (en) * | 1987-06-30 | 1991-05-07 | Uop | Process for sequestering ammonia and the odor associated therewith |
DE3813562C2 (de) * | 1988-04-22 | 1997-11-27 | Hasso Von Bluecher | Aktivkohlefilterschicht für Gasmasken |
DE3813564C2 (de) * | 1988-04-22 | 1997-11-06 | Hasso Von Bluecher | Aktivkohlefilterschicht für Gasmasken |
US5158582A (en) * | 1988-05-30 | 1992-10-27 | Hitachi Zosen Corporation | Method of removing NOx by adsorption, NOx adsorbent and apparatus for purifying NOx-containing gas |
US4931071A (en) * | 1989-03-09 | 1990-06-05 | The Boc Group, Inc. | Method for densely packing molecular sieve adsorbent beds in a PSA system |
US5248489A (en) * | 1989-06-07 | 1993-09-28 | Phillips Petroleum Company | Selective removal of hydrogen sulfide over a zinc oxide and silica absorbing composition |
KR0148793B1 (ko) * | 1989-06-23 | 1998-10-15 | 죠셉 에이. 피세테 | 독성가스 그리고/또는 증기 흡착용 크롬비함유 함침 활성탄 |
US5197208A (en) * | 1991-02-06 | 1993-03-30 | Combe Incorporated | Odor-adsorbent activated charcoal |
US5480556A (en) * | 1991-07-01 | 1996-01-02 | Ulan; Judith G. | Trapping and sealing process |
WO1993010896A1 (fr) * | 1991-11-27 | 1993-06-10 | Calgon Carbon Corporation | Carbone exempt de chrome, impregne et active pour l'adsorption de gaz/ou vapeurs toxiques, s'appliquant a des systemes de respiration |
FR2728476B1 (fr) * | 1994-12-23 | 1997-03-14 | App De Protection Soc Nouv | Remplissages pour filtres pour la protection des voies respiratoires a grains de charbon actif impregnes et filtres comportant ces remplissages |
US6471886B1 (en) * | 2000-10-27 | 2002-10-29 | Sandia National Laboratories | Absorption media for irreversibly gettering thionyl chloride |
DE10219966A1 (de) * | 2002-05-03 | 2003-11-20 | Freudenberg Carl Kg | Ozonfiltermaterial |
GB0307332D0 (en) * | 2003-03-29 | 2003-05-07 | Carbon Technologies Nv | Shaped porous materials |
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 |
CN100336587C (zh) * | 2005-06-22 | 2007-09-12 | 中山大学 | 含纳米氧化锌微粒的多孔炭吸附剂及其制备方法和用途 |
KR101597061B1 (ko) * | 2006-10-30 | 2016-02-24 | 쓰리엠 이노베이티브 프로퍼티즈 컴파니 | 아민 민감성 함침제 및 아민 민감성 기재와의 상용성이 향상된 시아노-함유 오염물을 제거하는 데 효과적인 여과제를 포함하는 필터 매체 제조방법 |
KR101525769B1 (ko) * | 2007-06-26 | 2015-06-04 | 이노닉스 테크놀로지스, 인코포레이티드 | 인간 병원체의 전파를 감소시키기 위한 장치 |
US20100180830A1 (en) * | 2009-01-22 | 2010-07-22 | Fritter Charles F | Animal litter air treatment device containing activated carbon |
WO2010027991A2 (fr) * | 2008-09-02 | 2010-03-11 | 3M Innovative Properties Company | Filtre à air gazeux exempt d’ammoniac |
US8585808B2 (en) * | 2010-11-08 | 2013-11-19 | 3M Innovative Properties Company | Zinc oxide containing filter media and methods of forming the same |
US10449492B2 (en) * | 2014-05-30 | 2019-10-22 | Ada Carbon Solutions, Llc | Catalytically enhanced compositions for efficient removal of contaminants in flue gas streams |
WO2016205083A1 (fr) | 2015-06-19 | 2016-12-22 | 3M Innovative Properties Company | Sorbants polymères de divinylbenzène / anhydride maléique hydrolysés pour le dioxyde de carbone |
CN107810054B (zh) | 2015-06-19 | 2020-05-19 | 3M创新有限公司 | 用于二氧化碳的二乙烯基苯/马来酸酐聚合物吸附剂 |
US11285459B2 (en) | 2015-08-14 | 2022-03-29 | Ada Carbon Solutions, Llc | Sorbent compositions having amorphous halogen species for the sequestration of contaminants |
US11219878B2 (en) | 2015-08-14 | 2022-01-11 | Ada Carbon Solutions, Llc | Sorbent compositions having amorphous halogen species for the sequestration of contaminants |
TWI743071B (zh) | 2015-12-18 | 2021-10-21 | 美商3M新設資產公司 | 用於醛之聚合性吸著劑 |
JP6925338B2 (ja) | 2015-12-18 | 2021-08-25 | スリーエム イノベイティブ プロパティズ カンパニー | 反応性ガス用ポリマー吸着剤 |
CN108472624B (zh) | 2015-12-18 | 2022-03-18 | 3M创新有限公司 | 用于含氮化合物的含金属吸附剂 |
CN108367270B (zh) | 2015-12-18 | 2021-07-09 | 3M创新有限公司 | 用于二氧化碳的聚合物吸附剂 |
EP3394129A1 (fr) | 2015-12-22 | 2018-10-31 | 3M Innovative Properties Company | Résines phénoliques incorporées de manière interne dans des compositions adhésives de (méth)acrylate à base d'eau, mélanges réactionnels pré-adhésifs, procédés et articles |
EP3394193B1 (fr) | 2015-12-22 | 2020-03-18 | 3M Innovative Properties Company | Composition pré-adhésive emballée comprenant un matériau d'emballage contenant un acide polylactique, adhésifs et articles |
EP3429725B1 (fr) | 2016-03-14 | 2021-07-07 | 3M Innovative Properties Company | Filtres à air comprenant des sorbants polymères pour des gaz réactifs |
US10960341B2 (en) | 2016-03-14 | 2021-03-30 | 3M Innovative Properties Company | Air filters comprising polymeric sorbents for aldehydes |
WO2017160637A1 (fr) | 2016-03-14 | 2017-09-21 | 3M Innovative Properties Company | Granules composites comportant un sorbant polymère pour des aldéhydes |
US11278832B2 (en) | 2017-06-16 | 2022-03-22 | 3M Innovative Properties Company | Air filters comprising polymeric sorbents for aldehydes |
EP3638414B1 (fr) | 2017-06-16 | 2024-03-27 | 3M Innovative Properties Company | Sorbants polymères pour aldéhydes |
US10773235B2 (en) | 2018-05-18 | 2020-09-15 | Marmon Water (Singapore) Pte. Ltd. | Modified activated carbon for adsorption of airborne formaldehyde and method for making the same |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1559980A (en) * | 1919-01-10 | 1925-11-03 | Yablick | Purification of air containing ammonia |
US1519470A (en) * | 1921-01-22 | 1924-12-16 | Robert E Wilson | Impregnated carbon and process of making same |
US1792939A (en) * | 1928-09-29 | 1931-02-17 | Drager Otto H | Absorbent for gas filters particularly for breathing purposes |
DE530381C (de) * | 1928-09-30 | 1931-07-28 | Draegerwerk Ag | Absorptionsmasse fuer Gasfilter, insbesondere solche fuer Atmungszwecke |
FR821721A (fr) * | 1936-06-13 | 1937-12-11 | Pirelli | Masse filtrante polyvalente pour filtres et épurateurs antigaz |
US2920050A (en) * | 1943-12-30 | 1960-01-05 | Francis E Blacet | Whetlerite product and process |
US2708208A (en) * | 1950-06-27 | 1955-05-10 | Shell Dev | Production of phenols |
DE976819C (de) * | 1953-09-01 | 1964-05-06 | Auergesellschaft Gmbh | Verfahren zur Herstellung einer zum Abfangen von Cyanwasserstoff und seiner Halogenderivate aus der Atemluft dienenden Filtermasse |
US3436352A (en) * | 1966-08-31 | 1969-04-01 | American Optical Corp | Adsorbent for ammonia gas |
US3883637A (en) * | 1971-03-29 | 1975-05-13 | Girdler Chemical | Catalytic method of purification of air for motor vehicle passenger compartment |
GB1427112A (en) * | 1973-06-25 | 1976-03-10 | Yoshitomi Pharmaceutical | Antifouling compositions |
FR2295782A1 (fr) * | 1974-12-27 | 1976-07-23 | Inst Francais Du Petrole | Procede d'epuration d'un gaz contenant du sulfure d'hydrogene et masses de contact utilisables a cet effet |
US4071609A (en) * | 1975-07-09 | 1978-01-31 | The New Jersey Zinc Company | Method for preparing particulate zinc oxide shapes of high surface area and improved strength |
JPS5939180B2 (ja) * | 1975-12-10 | 1984-09-21 | 武田薬品工業株式会社 | エンキセイガスキユウチヤクザイ |
US4212852A (en) * | 1977-05-06 | 1980-07-15 | Takeda Chemical Industries, Ltd. | Method of deodorizing gas containing hydrogen sulfide and ammonia and/or amines |
GB1578865A (en) * | 1977-11-22 | 1980-11-12 | Kureha Chemical Ind Co Ltd | Method for removing ammonia and/or amines from a gas containing the same |
DE2757576C2 (de) * | 1977-12-23 | 1984-03-08 | Drägerwerk AG, 2400 Lübeck | Imprägnierte Aktivkohle zur Entfernung von sauren, katalytisch zersetzbaren und chemisch zu bindenden Schadstoffen aus Luft |
DE3013256C2 (de) * | 1980-04-03 | 1988-06-16 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München | Verfahren zur Herstellung von hochspezifischer Aktivkohle, die bei den Verfahren erhaltene Kohle und ihre Verwendung |
US4363790A (en) * | 1981-08-14 | 1982-12-14 | Institute Of Gas Technology | Desulfurization of H2 S containing gas streams with production of elemental sulfur |
DE3341712C2 (de) * | 1983-11-18 | 1987-03-05 | Drägerwerk AG, 2400 Lübeck | Luftreinigungsmittel zur Verwendung in Luftfiltern |
-
1983
- 1983-11-18 DE DE3341712A patent/DE3341712C2/de not_active Expired
-
1984
- 1984-05-25 NL NL8401676A patent/NL192668C/nl not_active IP Right Cessation
- 1984-06-20 CH CH2992/84A patent/CH663160A5/de not_active IP Right Cessation
- 1984-06-28 AT AT0209084A patent/AT390389B/de not_active IP Right Cessation
- 1984-08-07 FR FR848412889A patent/FR2555071B1/fr not_active Expired - Lifetime
- 1984-10-26 GB GB08427116A patent/GB2150127B/en not_active Expired
- 1984-11-09 BE BE0/213984A patent/BE901027A/fr not_active IP Right Cessation
- 1984-11-16 JP JP59240907A patent/JPS60118235A/ja active Pending
-
1985
- 1985-07-15 US US06/755,071 patent/US4677096A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4677096A (en) * | 1983-11-18 | 1987-06-30 | Dragerwerk A.G. | Air cleaning material for use in air filters |
Also Published As
Publication number | Publication date |
---|---|
GB8427116D0 (en) | 1984-12-05 |
ATA209084A (de) | 1989-10-15 |
NL8401676A (nl) | 1985-06-17 |
FR2555071A1 (fr) | 1985-05-24 |
DE3341712C2 (de) | 1987-03-05 |
DE3341712A1 (de) | 1985-05-30 |
GB2150127A (en) | 1985-06-26 |
CH663160A5 (de) | 1987-11-30 |
GB2150127B (en) | 1987-05-28 |
JPS60118235A (ja) | 1985-06-25 |
NL192668B (nl) | 1997-08-01 |
NL192668C (nl) | 1997-12-02 |
US4677096A (en) | 1987-06-30 |
AT390389B (de) | 1990-04-25 |
FR2555071B1 (fr) | 1992-02-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
BE901027A (fr) | Produit d'epuration de l'air pour filtres a air. | |
FR2515530B1 (fr) | Procede pour regenerer des catalyseurs contenant en particulier des impuretes metalliques | |
IT1119919B (it) | Procedimento per l'elettrolisi di una salamoia di cloruro di metallo alcalino | |
BE833862A (fr) | Procede pour regener et separer des catalyseurs contenant du rhodium ou de l'iridium contenus dans des residus de distillation | |
OA05938A (fr) | Procédé de fabrication d'un concentré protéique contenant des facteurs immunologiques d'origine lactique. | |
FR2483956B1 (fr) | Procede pour separer des metaux volatils d'une matiere contenant des oxydes metalliques | |
OA07154A (fr) | Procédé et appareil pour la séparation des résidus de bain d'électrolyse sur les anodes précuites . | |
IT1152298B (it) | Procedimento per l'ossidazione di alcooli ad aldeidi e/o chetoni | |
BE853246A (fr) | Procede pour separer et regenerer des catalyseurs contenant du rodhium a partir de residus de distillation obtenus dans les hydroformulations | |
FR2483955B1 (fr) | Separation de metaux non volatils d'une poussiere contenant des oxydes metalliques | |
MA20344A1 (fr) | Procede pour recuperer des metaux dans des matieres contenant de l'etain et/ou du zinc | |
FR2276400A1 (fr) | Electrode metallique pour cellule d'electrolyse de solutions d'halogenures alcalins | |
FR2537162B1 (fr) | Depot direct non electrolytique d'or sur des ceramiques metallisees | |
PT84697A (fr) | Procede pour la preparation de compositions pour le traitement de la calvitie et des alopecies contenant phenytoine et diazoxyde | |
PT77428A (fr) | Procede pour preparer de nouvelles amino-2-substitue-5-oxazoli-nes-2 et des compositions les contenant | |
FR2279695A1 (fr) | Matieres pour revetements, notamment de ceramique, contenant des metaux precieux | |
FR2516547B1 (fr) | Reacteur pour la recuperation du zinc contenu dans les ribblons, residus et mattes de ce metal | |
PT77429A (fr) | Procede pour preparer de nouvelles n-(amino-methyl-5 oxazolin-2 yl-2)n'-phenylurees et de compositions les contenant | |
AT382643B (de) | Vorrichtung zur kontinuierlichen elektrolytischen behandlung von metallstreifen | |
AT382899B (de) | Vorrichtung zur kontinuierlichen elektrolytischen behandlung von metallstreifen | |
BE878492A (fr) | Procede pour le traitement de solutions contenant du nitrate d'ammonium | |
FR2592325B1 (fr) | Recipient pour le traitement d'alliages metalliques liquides. | |
BE869644A (fr) | Compositions contenant de l'acetate de retinol pour les soins de la peau | |
BE853193A (fr) | Procede de concentration d'un bismuthure alcalin dans une matiere contenant egalement du plomb fondu | |
BE866554A (fr) | Procede de traitement hydrometallurgique pour l'elimination d'impuretes d'une solution contenant des metaux dissous |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
RE20 | Patent expired |
Owner name: *DRAGERWERK A.G. Effective date: 20041109 |