Kemira Oyj

Jonas Konn

Veli-Matti Vuorenpalo

Jaakko Simell

Anna-Maija Perander

Matti Hietaniemi

Asko Karppi

Marko Kolari

Reijo Aksela

Jaakko Hiltunen

Salla Puupponen

Nina Sneitz

Leif Robertsen

Pentti Pekonen

Oili Kallatsa

Ari Koskinen

Leif Robertson

Leif Robertsén

Kaisa Kaski

Anna Haarala

Riitta Ilmoniemi

Toni Aaltonen

Hanna Hoffren

Disclosed is a method for controlling a biofilm removing a formed biofilm and/or controlling a growth of microorganisms, preferably bacteria, in an aqueous environment of an industrial manufacturing process including a cellulosic fibre material. A compound according to Formula I is administered to the aqueous environment, in which Formula I 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 &#x2014;CHCHCONR5R6 group, where R5 and R6 represent independently hydrogen atom, alkyl or hydroxyalkyl having 1 to 4 carbon atoms, with the proviso that the compound according to Formula I is not 3-[(4-methylphenyl)sulphonyl]-2-propenenitrile or 4-amino-N-2-thiazolyl-benzenesulphonamide.

Method for controlling growth of microorganisms and/or biofilms in an industrial process

A dry strength composition for manufacture of paper, board or the like is disclosed. The dry strength composition includes, as a mixture, at least one anionically derivatized polysaccharide, and cationic starch having an amylopectin content &#x2265;80 weight-%. The anionically derivatized polysaccharide and the cationic starch provide the composition with a charge density in a range of 0.1-1.5 meq/g, when measured at pH 2.8, and &#x2212;0.1-&#x2212;3 meq/g, preferably &#x2212;0.3-&#x2212;2.5 meq/g, more preferably &#x2212;0.5-&#x2212;2.0 meq/g, when measured as an aqueous solution, at pH 7.0. Further disclosed are a use of the composition and a method for manufacturing paper, board or the like.

Dry strength composition, its use and method for making of paper, board or the like

The present invention relates to a process for in situ the preparation of mixtures of chelating agents by catalyzed reactions of diethanolamine derivatives with maleic acid and then with 2-halocarboxylic acid, to mixtures of chelating agents and methods using such chelating agents.

Process for the preparation of a mixture of chelating agents, mixture of chelating agents and methods of using them

The present invention relates to a process for treating pulp comprising a step, wherein the pulp is treated with distilled percarboxylic acid, such as distilled per-carboxylic acid (dPAA), and peroxide, such as hydrogen peroxide.

Process for treating pulp

A process for a preparation of arylsulfonylpropenenitriles is disclosed. A reaction starting from arylsulfonyl iodides is catalyzed by light. The process is scalable, environmentally benign and provides the product in good yield.

Process for the preparation of arylsulfonylpropenenitriles by photocatalytic reactions

The invention relates to a method for reducing pulp viscosity in production of dissolving pulp. The method comprises producing cellulose pulp, whereby the obtained cellulose pulp has a cellulose content of at least 90%, and bleaching the obtained cellulose pulp. The cellulose pulp is treated after bleaching with performic acid.

Method for reducing pulp viscosity in production of dissolving pulp

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Espoo, Finland

Jonas Konn