Method for making pelleted phosphated catalysts derived from group IVB transition metal oxides and catalysts thus prepared
US4806517A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 12, 1987 |
| Grant date | Feb 21, 1989 |
| Priority date | — |
| Expiry date | Mar 12, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J27/18
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
This invention is directed to novel catalyst compositions based on a pelleted group IVb transition metal oxide to which about 0.5 to about 7 wt. % of phosphorus is thermally chemically bonded by a novel process wherein the pellets are impregnated with a liquid water-soluble phosphorus compound containing phosphorus-oxygen bonds, thermally treated after removal of unabsorbed liquid for 0.5 to 5 hours at 100.degree.-150.degree. C. to chemically bond the recited amount of phosphorus to the pellets followed by calcination at 200.degree. to 900.degree. C. to stabilize the pellets. Also disclosed is a regenerative process for preparing predominantly linear polyethylenepolyamines from ethylenediamine and monoethanolamine using the novel catalyst compositions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.