Treatment of water
AssigneeBwa Water Additives UK Limited
InventorsJeffrey Frank Kramer, Christy Colleen Wentworth
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Abstract
The present invention relates to water treatment. In one embodiment there is provided a method of treating an aqueous system to inhibit growth of one or more micro-organisms therein and/or to reduce the number of live micro-organisms therein. The method comprises adding treatment agents to said aqueous system and wherein said treatment agents comprise: (a) a phosphonium compound; and (b) an nitro compound.
Claims16
A method of treating an aqueous system having a total dissolved solids (TDS) of 1000 mg l−1 or greater to inhibit growth of one or more micro-organisms therein and/or to reduce the number of live micro-organisms therein, wherein the method comprises adding treatment agents to said aqueous system and wherein said treatment agents comprise:
- (a) tri n-butyl n-tetradecyl phosphonium chloride (TTPC);
- and
- (b) a nitro compound which has formula:
- wherein
- R3 is selected from the group consisting of:
- a halogen;
- a hydrogen;
- or
- a C1-C6 alkyl group which is unsubstituted or substituted by:
- a hydroxyl group;
- a substituted or unsubstituted aryl group;
- or
- a substituted or unsubstituted heterocyclic group;
- R4 represents a C1-C6 alkyl group which is unsubstituted or substituted by:
- a hydroxyl group;
- a substituted or unsubstituted aryl group;
- or
- a substituted or unsubstituted heterocyclic group;
- and
- R5 represents a C1-C6 alkyl group which is unsubstituted or substituted by:
- a hydroxyl group;
- a substituted or unsubstituted aryl group;
- or
- a substituted or unsubstituted heterocyclic group;
- and
- wherein the method further comprises adding TTPC to the aqueous system in an amount of at least 1 part per million (ppm) and adding a nitro compound (b) to the aqueous system in an amount of at least at least 1 part per million (ppm) and wherein the method comprises adding TTPC and a nitro compound (b) to an aqueous system in a weight ratio, expressed as active compound, of TTPC:nitro compound of from 1.0:0.5 to 1.0:200.0.
A method of treating an aqueous system having a total dissolved solids (TDS) of 1000 mg l−1 or greater to inhibit growth of one or more micro-organisms therein and/or to reduce the number of live micro-organisms therein, wherein the method comprises adding treatment agents to said aqueous system and wherein said treatment agents comprise:
- (i) tri n-butyl n-tetradecyl phosphonium chloride (TTPC);
- and
- (ii) 2-hydroxymethyl-2-nitro-1,3-propanediol (THNM);
- and
- wherein the method further comprises adding TTPC to the aqueous system in an amount of at least 1 part per million (ppm) and adding THNM in an amount of at least at least 1 part per million (ppm) and wherein the method comprises adding TTPC and THNM to an aqueous system in a weight ratio, expressed as active compound, of TTPC:THNM of from 1.0:0.5 to 1.0:200.0.
A method of inhibiting the growth of one or more micro-organisms in a water based liquid having a total dissolved solids (TDS) of 1000 mg l−1 or greater, wherein the method comprises adding treatment agents to a water based liquid and wherein said treatment agents comprise:
- (a) tri n-butyl n-tetradecyl phosphonium chloride (TTPC);
- and
- (b) 2-hydroxymethyl-2-nitro-1,3-propanediol (THNM),
- wherein the method further comprises adding TTPC in an amount of at least 1 part per million (ppm) and adding THNM in an amount of at least at least 1 part per million (ppm) and wherein the method comprises adding TTPC and THNM in a weight ratio, expressed as active compound, of TTPC:THNM of from 1.0:0.5 to 1.0:200.0.
Dependencies are inferred from the claim text.