Amino acid mixtures, their alkali metal salts and process for preparing same
US4525294A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 14, 1983 |
| Grant date | Jun 25, 1985 |
| Priority date | — |
| Expiry date | Apr 14, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B33/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention relates to the preparation of mixtures of sterically hindered substituted N-secondary amino acids or their alkali metal salts by a one-step reductive condensation of an amino acid or its alkali metal salt containing a primary amino group and a ketone to thereby form a mono-substituted amino acid or alkali metal salt thereof, followed by preparing the corresponding sterically hindered tertiary amino acids or alkali metal salt thereof by reacting the mono-substituted amino acids or alkali metal salt thereof with an unhindered aldehyde under reducing conditions in the presence of a hydrogenating catalyst. The novel mixtures of the sterically hindered mono-substituted amino acids and the tertiary amino acids and their alkali metal salts are useful promoters for alkaline salts in "hot pot" acid gas scrubbing processes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.