Process for the preparation of polyoxyalkylene polyamines
US4766245A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 1, 1985 |
| Grant date | Aug 23, 1988 |
| Priority date | — |
| Expiry date | Mar 1, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G65/3255
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An improved method for the manufacture of high molecular weight polyoxyalkylene amines wherein a hydroxy-terminated polyoxyalkylene compound having a molecular weight of at least 500 is reacted with ammonia in the presence of hydrogen and Raney nickel/aluminum under anhydrous reductive amination conditions to provide the corresponding polyoxyalkylene amine in good yield and selectivity. The Raney nickel/aluminum is a nickel/aluminum alloy treated with a base, such as sodium hydroxide, so as to only partially leach the aluminum from the alloy, such that the final product contains from about 60 wt. % to about 75 wt. % of nickel and, correspondingly, from about 25 wt. % to about 40 wt. % of aluminum and is preferably used in nugget form.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.