Method for preparing a catalyst for the dehydration of an alkanolamine
US4477591A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 14, 1983 |
| Grant date | Oct 16, 1984 |
| Priority date | — |
| Expiry date | Jan 14, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J23/20
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A catalyst useful for dehydrating an alkanolamine to form an alkylenimine is prepared by providing an aqueous or hydrofluoric acid solution of a tantalum or niobium compound, neutralizing this solution with ammonium hydroxide to precipitate the metal hydroxide, washing the precipitated metal hydroxide with water and subsequently dissolving it in an aqueous solution of a lower carboxylic acid, e.g. oxalic acid, applying the acid solution to a catalyst support to impregnate it with the metal hydroxide and finally drying and calcining the impregnated support to form the desired metal oxide catalyst. An alkaline earth metal oxide is optionally employed by impregnating the support with an aqueous solution of the alkaline earth metal hydroxide, preferably prior to the application of the catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.