Method for making pelleted phosphated catalysts derived from group IVB transition metal oxides and catalysts thus prepared

摘要

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 DEG -150 DEG C. to chemically bond the recited amount of phosphorus to the pellets followed by calcination at 200 DEG to 900 DEG 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.