Catalyst for cracking oil feedstocks contaminated with metal
US5993645A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 1996 |
| Grant date | Nov 30, 1999 |
| Priority date | — |
| Expiry date | Nov 20, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2229/42
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A calcined cracking catalyst comprising zeolite crystals in an inorganic oxide matrix and containing less than about 0.75% Na.sub.2 O and, from 0.1 to 10% P expressed as P.sub.2 O.sub.5, the cracking catalyst being further characterized by exhibiting a spectra with a peak at about 3735 cm.sup.-1 when treated with pyridine and analyzed by FTIR. A process for manufacturing an FCC catalyst characterized by high tolerance to contaminated metals comprises providing fluid cracking catalyst microspheres containing zeolite Y in an inorganic oxide matrix and analyzing 20 to 60% by weight Al.sub.2 O.sub.3 and analyzing less than 0.75% wt. Na.sub.2 O; impregnating the catalyst with a solution of a phosphate or phosphite salt in amount such the microspheres analyze 0.5 to 10% by weight P.sub.2 O.sub.5 and calcining the microspheres in the absence of steam at a temperature above 1300.degree. F. and below 1600.degree. F. and recovering the product characterized exhibiting a spectra with a peak at about 3687 cm.sup.-1 and the intensity ratio of the peak at 3687 cm-.sup.1 to the peak at 3675 cm-.sup.1 is greater than about 0.8 when treated with pyridine and analyzed by FTIR.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.