Membrane disinfectant
AssigneeDiversey, Inc.
InventorsSandy te Poele, Harry Kany, Flemming Skou, Marco Haag
Life of this patent
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Abstract
A non-oxidizing, buffered disinfectant concentrate is provided to be included in a solution used to disinfect a membrane. The solution applied to the membrane is configured to have a pH that is compatible with the membrane. The disinfectant concentrate includes an aqueous solvent; a hydrotrope; a strong acid surface cleanser; a biocidal active, preferably, at least two biocidal actives; a buffer agent; and, optionally, an anionic surfactant. The biodical active may be selected to function both as a biocide and as a weak acid/buffer combination. A disinfectant solution applied to the membrane includes from about 0.1 wt % to about 3.5 wt % of this disinfectant concentrate.
Claims21
-37. (canceled)
A method for disinfecting a membrane, comprising the following steps in sequence:
- rinsing the membrane in at least one of a cleaning operation and after a cleaning operation;
- at least one of recirculating over the membrane and soaking the membrane with a non-oxidizing disinfectant solution;
- and
- post-rinsing the membrane for removal of the non-oxidizing disinfectant solution,
- wherein the non-oxidizing disinfectant solution comprises:
- an aqueous solvent,
- a biocidal active comprising a hydroxy acid and a fatty acid,
- a strong acid to provide the non-oxidizing disinfectant solution with a pH of greater than 1.8 when applied to the membrane,
- a buffer agent comprising a weak acid to maintain pH of the non-oxidizing disinfectant solution near a chosen value, and
- a hydrotrope.
Dependencies are inferred from the claim text.