Sorbent material for reducing formaldehyde emission
US4443354A · kind A · utility
43Cited by
9References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 26, 1982 |
| Grant date | Apr 17, 1984 |
| Priority date | — |
| Expiry date | Mar 26, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/662
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Granular sorbent material comprising a granular high surface area support impregnated with a water soluble, essentially non-volatile primary or secondary amine with equivalent weight less than about 400 and bearing either zero or two carbonyl substituents attached directly to the amino nitrogen atom is disclosed. The resulting material can be used as the filtration media in respirators, powered air purifiers, room air purifiers, ventilation filters, exhaust filters, process gas filters and the like to reduce the formaldehyde content of air.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.