Method of generating carbonate in situ in a use solution and of buffered alkaline cleaning under an enriched CO2 atmosphere

Patent metadata

Field	Value
Publication number	US-9206380-B2
Application number	US-201313804814-A
Country	US
Kind code	B2
Filing date	Mar 14, 2013
Priority date	Mar 14, 2013
Publication date	Dec 8, 2015
Grant date	Dec 8, 2015

Abstract

The invention is directed to methods of generating carbonate in situ in a use solution under an enriched CO 2 atmosphere. In another aspect, the invention is directed to methods of cleaning food processing surfaces under an enriched CO 2 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.

First claim

What is claimed is:

1. A method of generating carbonate in a use solution in situ under an enriched CO 2 atmosphere comprising:
(a) adding a carbonate-based alkalinity source to a CO 2 enriched atmosphere to form a use solution comprising adding the carbonate-based alkalinity source in an amount between about 0.5 wt. % and about 1.75 wt. % of the use solution;
(b) monitoring the equilibrium of carbonic acid, carbonate, and bicarbonate in the use solution;
(c) adjusting the…

Assignees

• Ecolab Usa Inc

Inventors

• Erickson Anthony W
• Fernholz Peter J

Classifications

• C11D3/10 Primary

  Chemistry & Metallurgy · mapped topic

• C11D3/386

  Chemistry & Metallurgy · mapped topic

• C11D11/0041

  Chemistry & Metallurgy · mapped topic

• C11D3/0052

  Chemistry & Metallurgy · mapped topic

• C11D2111/20

  Chemistry & Metallurgy · mapped topic