Process for preparation of catalyst for cleaning exhaust gases and catalyst prepared by the process
US4448895A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 4, 1982 |
| Grant date | May 15, 1984 |
| Priority date | — |
| Expiry date | Nov 4, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for preparing a catalyst for cleaning exhaust gases comprising a refractory carrier composed mainly of alumina and having deposited thereon, iron oxide, cerium oxide and at least one noble metal element, which comprises impregnating said carrier with PA0 (a) an aqueous solution A prepared by adding aqueous ammonia to an aqueous solution containing a water-soluble iron salt as a material for iron and a cerium salt of an organic acid as a material for cerium to adjust the pH of the aqueous solution to 6.0-9.0, and optionally adding an ammonium salt of an organic acid, and PA0 (b) an aqueous solution B containing a compound of the noble metal element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.