Materials for selective trapping of carbon monoxide
US8247392B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 19, 2002 |
| Grant date | Aug 21, 2012 |
| Priority date | — |
| Expiry date | Feb 15, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B2210/005
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Compounds of formula (I) are disclosed.The tetrapyrole ring in formula (I) can be substituted with a metal cation (M); R1, R2, R3 and R4 separately represent a hydrogen atom, a C1-4 alkyl or alkyloxy radical, or a phenyl radical optionally substituted by vinyl, hydroxy, nitro, amino, bromo, chloro, fluoro, iodo, benzyloxy, or hydroxymethyl radicals; R5, R6, R7 and R8 separately represent a hydrogen atom or a C1-4 alkyl radical; Ra, Rb and Rc separately represent a hydrogen atom, a C1-4 alkyl or alkyloxy radical optionally substituted by a halogen, or a phenyl radical optionally substituted by vinyl, hydroxy, nitro, amino, bromo, chloro, fluoro, iodo, benzyloxy, or hydroxymethyl radicals, wherein at least one of Ra, Rb, and Rc is a phenyl radical. Compounds of formula (I) bound to a silica, a sol-gel material or a mesoporous silica are useful for selective trapping of carbon monoxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.