Process for manufacturing amides
US4876374A · kind A · utility
14Cited by
14References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 22, 1987 |
| Grant date | Oct 24, 1989 |
| Priority date | — |
| Expiry date | May 22, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/08
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Amide compounds useful as additives in lubricating fluids as extreme pressure/antiwear agents are produced on a manufacturing scale. The amides are produced by simultaneously adding together and reacting a phosphorus-containing acid and aqueous acrylamide. Substantially equal molar amounts of the phosphorus-containing acid and the aqueous acrylamide are added together with sufficient cooling to maintain the reaction at a temperature below 50.degree. C. After insolation, the reaction product obtained is preferably further reacted with a coupling agent, preferably paraformaldehyde.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.