Method and apparatus for removing undesirable chemical substances from gases, exhaust gases, vapors, and brines
US5480524A · kind A · utility
Assignees
Inventor
Key dates
| Filing date | May 3, 1994 |
| Grant date | Jan 2, 1996 |
| Priority date | — |
| Expiry date | May 3, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S588/90
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention relates to a method and pertinent apparatus for purifying gases, exhaust gases, vapors, and brines, which are contaminated with undesirable chemical substances or contain high concentrations of these substances, by means of photocatalytic reactions occurring on the surface of catalysts. The catalysts are situated in a fixed or fluidized bed on catalyst carriers. In fluidized beds, the catalysts themselves can serve as catalyst carriers. The substrates to be purified are fed through a closed system which contains the catalyst carriers and catalysts. In the fixed-bed catalytic method, the catalyst carrier/catalyst system continuously or discontinuously passes through a washing zone to remove the generated mineralization products. The reaction is induced by shortwave photons of wavelengths between 250 and 400 nm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.