Recovery of surfactant from papermaking process
US6287417A · kind A · utility
11Cited by
15References
46Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 17, 1991 |
| Grant date | Sep 11, 2001 |
| Priority date | — |
| Expiry date | Dec 17, 2011 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H17/09
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for recovery of surfactant from a foamable liquid aqueous solution thereof wherein foamable liquid containing surfactant is sparged with air or gas forming foam enriched in surfactant and residual liquid depleted in surfactant, foam enriched in surfactant is separated from residual liquid and resolved into foamable liquid enriched in surfactant by separation of gas or air therefrom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.