Highly concentrated aqueous solutions of N,N-dialkyl-glycines and process for preparation thereof
US7056450B2 · kind B2 · utility
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12Claims
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Key dates
| Filing date | Oct 3, 2002 |
| Grant date | Jun 6, 2006 |
| Priority date | — |
| Expiry date | Oct 3, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C229/12
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
An aqueous high-concentration solution of N,N-dialkylglycine, economical, easy to handle, and useful for subsequent organic chemical reactions, is provided. Also is provided a process for production thereof. The aqueous high-concentration solution of N,N-dialkylglycine which contains the N,N-dialkylglycine at a concentration of 30–80% by mass, and a metal-mineral acid salt at a content of 0.3–3% by mass can be produced industrially from an aqueous N,N-dialkylglycine alkali metal salt as the source material by the steps of
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.