Selective oxidation catalysts for halogenated organics
US5457268A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 27, 1993 |
| Grant date | Oct 10, 1995 |
| Priority date | — |
| Expiry date | Oct 27, 2013 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA62D2101/28
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention relates to a process and a catalyst composition for the destruction of volatile organic compounds (VOCs). The process includes the step of contacting the VOCs with an oxygen-containing gas in the presence of a catalyst which is a metal-exchanged, metal-impregnated aluminosilicate zeolite with at least one exchanged metal in the zeolite being selected from the group consisting of Ti, V, Cr, Co, Ni, Cu, Fe, Mo, Mn, Pd, and Pt, and at least one impregnated metal in the zeolite being selected from the group consisting of Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Mo, Pd and Pt, and wherein the difference between the exchanged metal and the impregnated metal varies the temperature necessary to promote oxidation of the compounds and for a contact time sufficient to oxidize the compounds. The process reaction temperature can vary from about 100.degree. C. to about 650.degree. C. and the contact time can vary from about 0.01 to 20 seconds. Preferredly, the reaction temperature is from about 150.degree. C. to about 450.degree. C. and the contact time is from about 0.1 to 1.0 seconds. The CO/CO.sub.2 ratio and the Cl.sub.2 /HCl ratio in the gaseous effluent can be varied through selection …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.