Stabilized aqueous solutions for preparing catalysts and process for preparing catalysts
US5332709A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 22, 1993 |
| Grant date | Jul 26, 1994 |
| Priority date | — |
| Expiry date | Mar 22, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J27/188
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A stabilized aqueous solution for use in preparing catalysts is described which comprises water, at least one Group VIB element, at least one Group VIII element, an inorganic phosphorus-containing acid, and an amount of a reducing agent effective to dissolve the Group VIB and Group VIII elements and stabilize the solution. Examples of useful reducing agents include hydrazine compounds and hydroxylamine compounds. A method of preparing catalysts utilizing the stabilized aqueous solutions also is described and comprises PA1 (A) impregnating a foraminous carrier with an aqueous solution comprising water, at least one Group VIB element, at least one Group VIII element, an inorganic phosphorus-containing acid, and an amount of a reducing agent effective to dissolve the Group VIB and Group VIII elements and stabilize the solution wherein said Group VIB and Group VIII elements are present as salts capable of converted to their oxides upon calcination; and PA1 (B) thereafter drying and calcining the impregnated carrier to convert the Group VIB and Group VIII elements to their oxides.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.