Process for reducing inorganics from anionic surfactant solutions
US9315404B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 5, 2011 |
| Grant date | Apr 19, 2016 |
| Priority date | — |
| Expiry date | Oct 28, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C303/44
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process comprising contacting deionized water with one or more Strecker sulfonation reaction products of one or more halogenated alkyl ethers in the presence of sulfite, wherein the one or more Strecker sulfonation reaction products each comprise one or more inorganic salts on a dry basis and one or more surfactant components, form a filtration mixture; loading the filtration mixture into a high pressure filtration system containing a membrane having a membrane molecular weight cutoff allowing preferential passage of the inorganic salts, for example, of greater than or equal to 200 Daltons; wherein the high pressure filtration system is operated at a pressure greater than ambient pressure and is configured to cause crossflow of the filtration mixture along a surface of the membrane resulting in a permeate solution which substantially passes through the membrane and a retentate solution which substantially does not pass through the membrane; wherein the permeate comprises less than or equal to 15 weight percent surfactant component, based on the weight of the filtration mixture is provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.