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1. WO2019042985 - METHOD FOR CONTROLLING GROWTH OF MICROORGANISMS AND/OR BIOFILMS IN AN INDUSTRIAL PROCESS

Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

[ EN ]

CLAIMS

1 . Method for controlling of a biofilm, for removing of a formed biofilm and/or for controlling a growth of microorganisms, preferably bacteria, in an aqueous environment of an industrial manufacturing process comprising cellulosic fibre material, by administering to the aqueous environment of the process a composition comprising a compound according to Formula I


(I)

where

R1 , R2 and R3 independently represent a hydrogen atom; halogen atom; hydroxy group; amino group; alkylamino group, alkyl group, hydroxyalkyl group, haloalkyl group or alkoxy group having 1 to 4 carbon atoms; or an acylamido group having 1 to 10 carbon atoms; and

A represents 2-thiazolamine; 2-propenenitrile; 2-propenoic acid; alkyl ester or hydroxyalkyl ester of 2-propenoic acid having 1 to 4 carbon atoms; or -CHCHCONR5R6 group, where R5 and R6 represent independently hydrogen atom, alkyl or hydroxyalkyl having 1 to 4 carbon atoms,

with the proviso that the said compound is not 3-[(4-methylphenyl)sulphonyl]-2-propenenitrile or 4-amino-N-2-thiazolyl-benzenesulphonamide.

2. Method according to claim 1 , characterised in that in Formula (I)

R1 represents methyl group; ethyl propyl group; butyl group; methoxy group; ethoxy group; propoxy group; isopropoxy group; n-butoxy group; or tertiary butoxy group; and

R2 and R3 represent independently hydrogen atom; methyl group; ethyl propyl group; butyl group; methoxy group; ethoxy group; propoxy group; isopropoxy group; n-butoxy group; tertiary butoxy group; and

A represents 2-propenenitrile;

R1 , R2, R3 being located independently in ortho, meta or para position relative to A.

3. Method according to claim 1 , characterised in that in Formula (I)

R1 represents methyl group; ethyl propyl group; butyl group; methoxy group; ethoxy group; propoxy group; isopropoxy group; n-butoxy group; tertiary butoxy group; or amino group; and

R2 and R3 represent independently hydrogen atom; methyl group; ethyl propyl group; butyl group; methoxy group; ethoxy group; propoxy group; isopropoxy group; n-butoxy group; tertiary butoxy group; and

A represents -CHCHCONR5R6 group, where R5 and R6 represent independently hydrogen atom; alkyl or hydroxyalkyl having 1 to 4 carbon atoms; preferably R5 and R6 representing hydrogen atoms,

R1 , R2, R3 being located independently in ortho, meta or para position relative to A.

4. Method according to claim 1 , characterised in that the compound according to Formula (I) is selected from group consisting of 3-phenylsulphonyl-2-propenenitrile, 3-[(4-fluorophenyl)sulphonyl]-2-propenenitrile, 3-[(4-trifluormethylphenyl)sulphonyl]-2-propenenitrile, 3-[(2,4-dimethylphenyl)sulphonyl]-2-propenenitrile, 3-[(3,4-dimethylphenyl)sulphonyl]2-propenenitrile, 3-(3,5-dimethylphenyl)sulphonyl-2-propenenitrile, 3-[(2,4, 6-trimethylphenyl)sulphonyl]-2-propenenitrile, 3-(4-methoxyphenyl)sulphonyl-2-propenenitrile, 3-[(4-methylphenyl)sulphonyl]prop-2-enamide, 3-[(4-methylphenyl)sulphonyl]prop-2-enoic acid, and any of their isomers.

5. Method according to claim 4, characterised in that the compound according to Formula (I) is selected from group consisting of 3-phenylsulphonyl-2-propenenitrile, 3-[(4-trifluormethylphenyl)sulphonyl]-2-propenenitrile, 3-[(2,4, 6-trimethylphenyl)sulphonyl]-2-propenenitrile, 3-(4-methoxyphenyl)sulphonyl-2-propenenitrile and 3-[(4-methylphenyl)sulphonyl]prop-2-enamide; and any of their isomers.

6. Method according to any of preceding claims 1 - 5, characterised in administering the composition to the aqueous environment in amount of 0.01 -100 ppm, preferably 0.01 - 10 ppm, more preferably 0.01 - 2 ppm, calculated as active compound.

7. Method according to any of preceding claims 1 - 6, characterised in administering the composition to the aqueous environment in amount of 0.01 - 1 ppm, preferably 0.01 - 0.5 ppm, more preferably 0.01 - 0.3 ppm, calculated as active compound.

8. Method according to any of preceding claims 1 - 7, characterised in that the aqueous environment comprises bacteria belonging to genus of Meiothermus, Deinococcus and/or Pseudoxanthomonas, either alone or in any combination or the aqueous environment is in contact with a biofilm at least partially formed by any of the said bacteria.

9. Method according to any of preceding claims 1 - 8, characterised in that the aqueous environment comprises water; cellulosic fibres, preferably lignocellulosic fibres; and further optionally starch; inorganic mineral particles, such as fillers and/or coating minerals; hemicelluloses; lignin; and/or dissolved and colloidal substances.

10. Method according to any of preceding claims 1 - 9, characterised in administering the composition to an industrial manufacturing process, which comprises cellulosic fibre material and which is selected from manufacture of paper, board, pulp, tissue, moulded pulp, non-woven or viscose, preferably manufacture of pulp, paper or board.

1 1 . Method according to any of preceding claims 1 - 10, characterised in administering the composition to the aqueous environment, which comprises a residual of peroxide from about 0.01 to about 100 ppm.

12. Method according to any of preceding claims 1 - 1 1 , characterised in that the temperature of the aqueous environment is at least 40 °C, preferably at least 50 °C.

13. Method according to any of preceding claims 1 - 12, characterised in administering the composition periodically in the aqueous environment for 3 - 45 minutes for 6 - 24 times a day, preferably for 10 - 30 minutes for 12 - 24 times a day.

14. Method according to any of claims 1 - 13, characterised in using the composition in addition of with other biocidal or antimicrobial agents.

15. Method according to claim 14, characterised in administering the composition to the aqueous environment, which comprises a residual of active halogen in the range from about 0.01 to about 20 ppm, given as active chlorine.