EP 0000625 A1 19790207 - Tobacco smoke filter element with alkali ferrate supported on granular material.
Title (en)
Tobacco smoke filter element with alkali ferrate supported on granular material.
Title (de)
Tabakrauchfilterelement enthaltend Alkaliferrat auf granuliertem Trägermaterial.
Title (fr)
Elément filtrant pour fumée de tabac avec ferrate d'alcali sur support granulaire.
Publication
Application
Priority
US 82050277 A 19770801
Abstract (en)
Alkali, e.g. potassium, ferrates as impregnating substances for inert gas-permeable granular support materials, e.g. polyethylene or a zeolite optionally admixed with activated carbon or activated alumina (which may be impregnated, for instance, with sodium permanganate and a basic sodium compound), are disclosed; the resulting impregnated materials may be used as additives for general use, especially treating fluids or fluid suspensions to selectively remove at least part of an undesirable constituent. One particular undesirable constituent which may be at least partly selectively removed from a fluid or fluid suspension by means of the impregnated materials is hydrogen cyanide and this is of special importance for treating, e.g., tabacco smoke.
IPC 1-7
IPC 8 full level
A24D 3/16 (2006.01); B01J 20/32 (2006.01)
CPC (source: EP US)
A24D 3/16 (2013.01 - EP US); B01J 20/0222 (2013.01 - EP US); B01J 20/0229 (2013.01 - EP US); B01J 20/04 (2013.01 - EP US); B01J 20/041 (2013.01 - EP US); B01J 20/043 (2013.01 - EP US); B01J 20/08 (2013.01 - EP US); B01J 20/186 (2013.01 - EP US); B01J 20/20 (2013.01 - EP US); B01J 20/28004 (2013.01 - EP US); B01J 20/28057 (2013.01 - EP US); B01J 20/2808 (2013.01 - EP US); B01J 20/3085 (2013.01 - EP US); B01J 20/3092 (2013.01 - EP US); B01J 20/3204 (2013.01 - EP US); B01J 20/321 (2013.01 - EP US); B01J 20/3236 (2013.01 - EP US); B01J 2220/42 (2013.01 - EP US); B01J 2220/66 (2013.01 - EP US)
Citation (search report)
- [X] GB 641261 A 19500809 - STANDARD OIL DEV CO
- US 2758090 A 19560807 - MILLS JOHN R, et al
- US 3434479 A 19690325 - TILL DEREK ELLIOTT, et al
- [A] GB 958470 A 19640521 - SHELL INT RESEARCH
- [A] US 2792841 A 19570521 - LARSON JOHN D
- [A] NL 6503794 A 19650927
- HYDROCARBON PROCESSING 54 (2), February 1975, TAKESHI KASAI: "Konox process removes H2S", pages 93-95
Designated contracting state (EPC)
CH DE GB NL
DOCDB simple family (publication)
EP 0000625 A1 19790207; EP 0000625 B1 19810128; DE 2860366 D1 19810319; US 4246910 A 19810127
DOCDB simple family (application)
EP 78300110 A 19780630; DE 2860366 T 19780630; US 82050277 A 19770801