Catalyst for use in hydrotreatment, comprising metals from groups VIII and VIB, and preparation with citric acid and C1-C4 dialkyl succinate
US11351529B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 10, 2012 |
| Grant date | Jun 7, 2022 |
| Priority date | — |
| Expiry date | Mar 19, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G2300/202
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A catalyst which comprises an amorphous support based on alumina, a C1-C4 dialkyl succinate, citric acid and optionally acetic acid, phosphorus and a hydrodehydrogenating function comprising at least one element from group VIII and at least one element from group VIB; the most intense bands comprised in the Raman spectrum of the catalyst are characteristic of Keggin heteropolyanions (974 and/or 990 cm−1), C1-C4 dialkyl succinate and citric acid (in particular 785 and 956 cm−1). Also a process for preparing said catalyst in which a catalytic precursor in the dried, calcined or regenerated state containing the elements of the hydrodehydrogenating function, and optionally phosphorus, is impregnated with an impregnation solution comprising at least one C1-C4 dialkyl succinate, citric acid and optionally at least one compound of phosphorus and optionally acetic acid, and is then dried. Further, the use of said catalyst in any hydrotreatment process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.