Process for preparing methylene diphenylamines by partial neutralization of acidic methylene diphenylamines
US6673970B1 · kind B1 · utility
4Cited by
4References
1Claims
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Assignee
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Key dates
| Filing date | Dec 29, 1999 |
| Grant date | Jan 6, 2004 |
| Priority date | — |
| Expiry date | Dec 29, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/7664
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed herein is a process for preparing a reaction product containing methylene diphenylamine, comprising reacting aniline and formaldehyde in the presence of an acid catalyst wherein the acid level of the resulting reaction mixture is reduced during digestion of the reaction mixture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.