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1. WO2020160081 - UTILISATION DE COMPOSÉS CATIONIQUES À BASE DE SUCRE POUR LUTTER CONTRE L'ENCRASSEMENT MICROBIEN DANS UN RÉSEAU D'ALIMENTATION EN EAU

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

What is claimed is:

1. A method of controlling microbial fouling in a water system comprising:

providing a fouling control composition into a water system to generate a treated water system,

wherein the fouling control composition comprises a cationic alkyl polyglycoside; and wherein the fouling control composition reduces bacterial growth or biofilm growth in the water system.

2. The method according to claim 1, wherein the cationic alkyl poly glycoside is a cationic alkyl polyglucoside and comprises one or more glucose units and at least one cationic alkyl group R-Y, wherein R is an alkyl group and Y is a cationic group.

3. The method according to claim 2, wherein the cationic alkyl polyglucoside is one


wherein R is an alkyl group; R is attached to at least one, more than one, or all the OH groups; and at least one R group contains a cationic group Y.

4. The method according to any one of claims 2-3, wherein the cationic alkyl polyglucoside comprises two or more glucose units and the glucose units are connected by glycosidic bond, a non-glycosidic bond, a linker, or a combination thereof.

5. The method according to any one of claims 3-4, wherein R is a C1-C30 alkyl or C8-C24 alkyl, wherein Y is -NR4R5R6(+), and R4, R5, and R6 are independently CH3, Y is -NR4R5R6(+), R4 and R5 are independently CH3, and R6 is a C2-C12 aromatic alkyl, Y is -NR4R5R6(+), R4 and R5 are independently CH3, and R6 is -CH2-C6H6, or Y is - NR4R5R6(+) and the counter ion for the cationic group Y is chloride, bromide, fluoride, iodide, acetate, aluminate, cyanate, cyanide, dihydrogen phosphate, dihydrogen phosphite, formate,

hydrogen carbonate, hydrogen oxalate, hydrogen sulfate, hydroxide, nitrate, nitrite, thiocyanate, or a combination thereof.

6. The method according to any one of claims 2-5, wherein the cationic alkyl polyglucoside comprises one cationic alkyl group R-Y, two cationic alkyl groups R-Y, or three or more cationic alkyl groups R-Y.

7. The method according to any one of claims 2-6, wherein the cationic alkyl polyglucoside further comprises one or more nonionic alkyl groups R3, wherein R3 is: an unsubstituted, linear, and saturated C1-C20 alkylene group; an unsubstituted, linear, and unsaturated C1-C20 alkylene group; a linear C C ix alkyl, alkenyl, or alkynyl group; or a branched C8-C20 alkyl, alkenyl, or alkynyl group.

8. The method according to any one of claims 2-7, wherein the cationic alkyl polyglucoside is a single compound, or wherein the cationic alkyl polyglucoside is a mixture of two or more different alkyl polyglucosides, wherein the two or more different alkyl polyglucosides differ from each other by molecular weight, structure, net charge, or combination thereof.

9. The method according to any one of claims 2-8, wherein the cationic alkyl polyglucoside has an average molecular weight of from about 200 to about 5,500 Da.

10. The method according to claim 2, wherein the cationic alkyl polyglucoside is


wherein n is 0-10, R1 is a C1-C30 alkyl, and R2 is a C1-C30 alkyl.

11. The method according to any one of claims 2-10, wherein the cationic alkyl polyglucoside is soluble or dispersible in water or the fouling control composition.

12. The method according to any one of claims 1-11, wherein the fouling control composition further comprises one or more fouling control composition agents, and wherein the fouling control composition comprises a carrier, wherein the carrier is water, an organic solvent, or a mixture thereof.

13. The method according to claim 12, the organic solvent is an alcohol, a hydrocarbon, a ketone, an ether, an alkylene glycol, a glycol ether, an amide, a nitrile, a sulfoxide, an ester, or any combination thereof, or wherein the organic solvent is an alcohol, an alkylene glycol, an alkyleneglycol alkyl ether, or a combination thereof.

14. The method according to any one of claims 12-13, wherein the organic solvent is methanol, ethanol, propanol, isopropanol, butanol, isobutanol, monoethyleneglycol, ethyleneglycol monobutyl ether, 2-ethylhexanol, hexanol, octanol, decanol, 2-butoxy ethanol, methylene glycol, ethylene glycol, 1,2-propylene glycol, 1,3-propylene glycol, diethyleneglycol monomethyl ether, diethylene glycol monoethyl ether, ethylene glycol monobutyl ether, ethylene glycol dibutyl ether, pentane, hexane, cyclohexane, methylcyclohexane, heptane, decane, dodecane, diesel, toluene, xylene, heavy aromatic naphtha, cyclohexanone, diisobutylketone, diethyl ether, propylene carbonate, N-methylpyrrolidinone, N,N-dimethylformamide, a mixture thereof with water, or any combination thereof.

15. The method according to any one of claims 1-14, wherein the fouling control composition further comprises one or more of corrosion inhibitors, and wherein the corrosion inhibitor is an imidazoline compound, a pyridinium compound, or a combination thereof.

16. The method according to any one of claims 1-15, wherein the fouling control composition further comprises an additional fouling control agent, wherein the additional fouling control agent a single quaternary compound, and optionally wherein the fouling control composition further comprises a biocide, wherein the biocide is chlorine, hypochlorite, ClC , bromine, ozone, hydrogen peroxide, peracetic acid, peroxycarboxylic acid, peroxycarboxylic acid composition, peroxysulphate, glutaraldehyde,

dibromonitrilopropionamide, isothiazolone, terbutylazine, polymeric biguanide, methylene bisthiocyanate, tetrakis hydroxymethyl phosphonium sulphate, and any combination thereof.

17. The method according to any one of claims 1-16, wherein the fouling control composition further comprises preservative and/or an acid and wherein the fouling control composition comprises from about 1 wt-% to about 20 wt-% of the acid, and wherein the acid is hydrochloric acid, hydrofluoric acid, citric acid, formic acid, acetic acid, or mixture thereof.

18. The method according to any one of claims 1-17, wherein the fouling control composition further comprises a hydrogen sulfide scavenger, and wherein the hydrogen sulfide scavenger is an oxidant, inorganic peroxide, sodium peroxide, chlorine dioxide; a Ci-Cio aldehyde, formaldehyde, glyoxal, glutaraldehyde, acrolein, or methacrolein, a triazine, monoethanolamine triazine, monomethylamine triazine, or a mixture thereof.

19. The method according to any one of claims 1-18, wherein the fouling control composition further comprises a surfactant, wherein the surfactant is a nonionic, semi nonionic, cationic, anionic, amphoteric, zwitterionic, Gemini, di-cationic, di-anionic surfactant, or mixtures thereof, or wherein the surfactant is an alkyl phenol, fatty acid, or mixture thereof.

20. The method according to any one of claims 1-19, wherein the fouling control composition further comprises an asphaltene inhibitor, a paraffin inhibitor, a scale inhibitor, a gas hydrate inhibitor, a pH modifier, an emulsion breaker, reverse emulsion breaker, coagulant/flocculant agent, an emulsifier, a water clarifier, a dispersant,

antioxidant, polymer degradation prevention agent, permeability modifier, foaming agent, antifoaming agent, emulsifying agent, scavenger agent for CO2, and/or O2, gelling agent, lubricant, friction reducing agent, salt, or mixture thereof.

21. The method according to any one of claims 1-20, wherein the fouling control composition is a liquid, gel, or a mixture comprising liquid/gel and solid, and wherein the fouling control composition or a use solution thereof has a pH of from about 2 to about 11.

22. The method according to any one of claims 1-21, wherein the fouling control composition comprises from about 20 wt-% to about 60 wt-% of the cationic alkyl poly glycoside or mixture thereof, and/or wherein the cationic alkyl poly glycoside or mixture thereof has a concentration of from about 1 ppm to about 1000 ppm in the treated water system.

23. The method according to any one of claims 12-22, wherein the cationic alkyl polyglucoside or mixture thereof is provided to the water system independently, simultaneously, or sequentially with one or more of the fouling control composition agents, and wherein the water system comprises fresh water, recycled water, salt water, surface water, produced water, or mixture thereof, or wherein the water system is a cooling water system, boiler water system, petroleum wells, downhole formations, geothermal wells, mineral washing, flotation and benefaction, papermaking, gas scrubbers, air washers, continuous casting processes in the metallurgical industry, air conditioning and

refrigeration, water reclamation, water purification, membrane filtration, food processing, clarifiers, municipal sewage treatment, municipal water treatment, or potable water system.

24. The method according to any one of claims 1-23, wherein the water system is a surface exposed to water moisture.

25. A fouling control composition comprising a cationic alkyl polyglycoside and one or more fouling control composition agents, wherein the composition mitigates biofilm growth in a water system.