Catalytic method for the reductive amination of poly(oxytetramethyle) glycols
US5003107A · kind A · utility
34Cited by
12References
7Claims
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Key dates
| Filing date | Dec 18, 1989 |
| Grant date | Mar 26, 1991 |
| Priority date | — |
| Expiry date | Dec 18, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G65/3255
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Poly(oxytetramethylene) diamines useful in the preparation of polyamide and polyurea elastomers are prepared by the catalytic reductive amination of a poly(oxytetramethylene) glycol feedstock under reductive amination conditions in the presence of ammonia and hydrogen using a hydrogenation/dehydrogenation catalyst composed of, on an oxide-free basis, about 70 to 75 wt. % of nickel, about 20 to about 25 wt. % of copper, about 0.5 to 5 wt. % of chromium and about 1 to 5 wt. % of molybdenum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.