Catalyst and method of preparation
US5935889A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 4, 1996 |
| Grant date | Aug 10, 1999 |
| Priority date | — |
| Expiry date | Oct 4, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2235/30
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Catalyst particles are prepared by coating a core particle, which is usually catalytically inert with respect to the intended chemical reaction, in a fluidized bed coating apparatus. The coating technique involves repeatedly applying and drying small quantities of an atomized slurry containing the coating material in the form of a colloidal dispersion or in the form of very fine, non-colloidal particles preferably mixed with colloidal particles. In this way, incremental layers are formed to produce a final thin shell which has a highly uniform thickness, which is formed on the surface of the core and which does not penetrate porous cores. Various methods are disclosed for converting the coated particles to the desired catalyst form.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.