Process for purification of organic sulfonates and novel product
US6183648A · kind A · utility
46Cited by
9References
17Claims
0Family size
Assignee
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Key dates
| Filing date | Apr 2, 1998 |
| Grant date | Feb 6, 2001 |
| Priority date | — |
| Expiry date | Apr 2, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2311/04
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for producing a low sulfate organic sulfonate/sulfate aqueous solution from a soluble sulfate containing organic sulfonate/sulfate which comprises forming an aqueous solution of organic sulfonate/sulfate; and passing the aqueous solution of the organic sulfonate/sulfate containing the soluble sulfate over a nanofiltration zone at an elevated pressure to form a retentate with a reduced sulfate content and a permeate containing the soluble sulfate and organic material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.