Method of generating carbonate in situ in a use solution and of buffered alkaline cleaning under an enriched CO2 atmosphere
US9206380B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 14, 2013 |
| Grant date | Dec 8, 2015 |
| Priority date | — |
| Expiry date | Aug 31, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D2111/20
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The invention is directed to methods of generating carbonate in situ in a use solution under an enriched CO2 atmosphere. In another aspect, the invention is directed to methods of cleaning food processing surfaces under an enriched CO2 atmosphere comprising contacting a food processing surface with a cleaning composition comprised of an alkalinity source, a surfactant, and water, monitoring the pH during the wash cycle and adjusting the pH by recirculating a use solution, adding a secondary alkalinity source, or both recirculating a use solution and adding a secondary alkalinity source, to generate carbonate in situ in the use solution. In a particular embodiment of the invention the alkalinity source is an alkali metal carbonate and the secondary alkalinity source is an alkali metal hydroxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.