Process for manufacturing aminoundecanoic acid and aminodecanoic acid
US12428368B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 16, 2021 |
| Grant date | Sep 30, 2025 |
| Priority date | — |
| Expiry date | Jan 10, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C227/40
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Process for producing aminocarboxylic acid of formula (I): NH3—CH2—(CH2)n—COOH (I) including: (i) reacting the unsaturated carboxylic acid of formula (II): CH═CH—(CH2)n-1—COOH (II) with hydrogen bromide to form the ω-bromoalkanoic acid of formula (iii): Br—CH2—(CH2)n—COOH (III); (ii) reacting the ω-bromoalkanoic acid obtained with ammonia in aqueous solution to form a reaction mixture; (iii) separating the reaction mixture of the aminocarboxylic acid of formula (I) and an aqueous solution rich in ammonium bromide; (iv) bringing the aqueous solution rich in ammonium bromide into contact with sodium hydroxide to form ammonia and an aqueous solution rich in sodium bromide; (v) purifying the aqueous solution rich in sodium bromide; (vi) bringing the purified aqueous solution rich in sodium bromide into contact with chlorine to form bromine and an aqueous solution rich in sodium chloride; (vii) reacting the bromine with hydrogen to form hydrogen bromide; and (viii) recycling the hydrogen bromide to step (i).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.