Defoaming compositions for high acid strength media
US6544489B2 · kind B2 · utility
1Cited by
13References
23Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 5, 2001 |
| Grant date | Apr 8, 2003 |
| Priority date | — |
| Expiry date | Jan 5, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D19/0404
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A defoaming composition useful in high strength acid media includes an ester condensate of a C12-C20 fatty acid and a at least one alcohol derivative selected from the group consisting of C1-C4 alcohol ethoxylates having at least three ethoxylate residues per molecule, C1-C4 alcohol propoxylates having at least three propoxylate residues per molecule and C1-C4 alcohol mixed ethoxylate-propoxylates having at least three total ethoxylate and propoxylate residues per molecule. The condensate is preferably liquid at room temperature and miscible with water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.