Foam control in fermentation broths with a condensate of alkylphenol and aldehyde that has been polyoxyalkylated
US5288789A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 26, 1992 |
| Grant date | Feb 22, 1994 |
| Priority date | — |
| Expiry date | Mar 26, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC12N1/00
- WIPO fieldBiotechnology
- WIPO sectorChemistry
Abstract
A method is disclosed for controlling foam in a fermentation broth by adding to the fermentation broth an effective amount of a composition comprising a compound corresponding to the formula: ##STR1## wherein AO is an oxyalkylene copolymer moiety of oxypropylene and oxyethylene units, each oxyalkylene copolymer moiety having a molecular weight of at least about 300 and an oxypropylene to oxyethylene molar ratio of from about 2:1 to about 10:1, n is an integer from about 1 to about 20, R is an alkyl group of from about three to about twelve carbon atoms, and R' is methylene or substituted methylene. The composition can be added to fermentation broths to prevent the formation of foam or to reduce foam which has already formed. The above defined composition is also disclosed in a form free of solvent, such as xylene.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.