Process for producing surfactant having two head groups and a single tail group per molecule
US11566181B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 2, 2021 |
| Grant date | Jan 31, 2023 |
| Priority date | — |
| Expiry date | Sep 29, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C329/16
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for producing a surfactant having two head groups and a single tail group per molecule, including steps of: producing a compound of Formula (1) from ethanol and carbon disulfide; producing a compound of Formula (2) from a carboxylic acid and bromine; producing a compound of Formula (3) from the compound of Formula (2) and methanol; producing a compound of Formula (4) from the compound of Formula (1) and the compound of Formula (3); and producing a compound of Formula (5) from the compound of Formula (4) by a direct oxidation process or by a peracid oxidation process. The surfactant produced by the process has lower critical micelle concentration and enables a lower surface tension of a liquid as compared with prior surfactants with two head groups per molecule, thereby enabling the amount of surfactant required and thus the cost to be substantially reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.