Method for cleaning exhaust gases
US4743435A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 13, 1985 |
| Grant date | May 10, 1988 |
| Priority date | — |
| Expiry date | Mar 13, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J20/3078
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for cleaning an exhaust gas containing at least one toxic component selected from the group consisting of arsine, phosphine, diborane and hydrogen selenide is disclosed. The method comprises contacting the toxic component with a molded cleaning agent having a composition consisting essentially of (1) cupric oxide and (2) at least one metal oxide selected from the group consisting of silicon oxide, aluminum oxide and zinc oxide and having a density of from about 1.5 to about 3.5 g/ml, said composition having a metal atomic ratio M/(M+Cu) in the range of from about 0.02 to about 0.7 wherein Cu represents a number of gram atom of copper and M represents a total number of gram atom of silicon, aluminum and/or zinc, to remove the toxic component from the exhaust gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.