Water-in-oil emulsion defoamer compositions, their preparation and use
US4225456A · kind A · utility
40Cited by
7References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 6, 1978 |
| Grant date | Sep 30, 1980 |
| Priority date | — |
| Expiry date | Nov 6, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D19/0404
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Water based defoamer compositions which are invert (water in oil) emulsions containing quick-chilled amides, hydrophobic silica, polymers, emulsifiers, oil and water are useful in defoaming aqueous systems such as found in the kraft pulping process. Optionally, these defoamer compositions may contain silicone surfactants, formaldehyde solution and silicone oil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.