Eka® ClO2 - chlorine dioxide - bleaching agent

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Chlorine dioxide is a preferable bleaching agent used in the production of elemental chlorine-free (ECF) bleached chemical wood pulp.

A chlorine dioxide plant produces chlorine dioxide by reducing chlorite or chlorate, both normally supplied as sodium salts, in a sulfuric acid (H₂SO₄) solution. Several commercially applied reducing agents are available, but methanol (CH₃OH) and hydrogen peroxide (H₂O₂) are preferred because elemental chlorine production is minimized.

Due to its nature, chlorine dioxide must be produced where it will be used. We offer several best available techniques for its generation, each with their own special features.

When there is a commercial and technical fit for a particular customer, a Integrated Manufacturing Model (IMM) can be built adjacent to the customer’s facility, integrating sodium chlorate and chlorine dioxide production.

Related products and services

Eka® SC - sodium chlorate

Eka® SC - NaClO3 is a powerful oxidizing agent used by the pulp and paper industry. Other applications include surface treatment of metals and more.

The chlorine dioxide production unit at our Imperatriz Chemical Island

Eka® ClO2 - chlorine dioxide technologies

Best available techniques for ClO2 production. We offer innovative, reliable and environmentally compatible manufacturing technologies and services.

Operator at a chemical plant. Experts can help optimize your process by improving bleaching and chemical efficiency.

Eka® bleaching services

We provide pulp bleaching services and chlorine dioxide generator expertise to help keep our customers operations running smoothly.

Chlorine dioxide based De-NOx technology

Chlorine dioxide based De-NOx technology

Chlorine dioxide, produced from sodium chlorate, is a powerful solution that can be used in De-NOx technologies abating NOx and SOx emissions.

Featured applications

Packaging materials

We provide essential chemistry that enhances the properties of high-quality packaging solutions.

Young boy using tissue paper to clean up a floor. We help make pulp white and bright! Our innovative Chemical Island – a state-of-the-art facility located next to a customer's pulp mill, often inside the perimeter fence. Operated by our experts who ensure consistent production and delivery of chemicals needed to operate the mill.

Pulp and paper

Discover how we help improve pulp and paper product quality with pioneering solutions throughout the process.

Featured products

Chlorine dioxide

Eka ClO₂

Eka® ClO₂ is chlorine dioxide; it is generally produced, stored and typically fed as an 8-11 grams per liter aqueous solution to the desired application point.

Show all Eka® SC, HP and ClO2 products

Download documents

Best available ClO2 technologies for the pulp industry
Andrés Quintero - Japan TAPPI - May 2021

Type: Papers and articles

Language: English

Format: pdf | 762.8 KB

Pulp bleaching, ClO2 technology and related challenges
Barry Billett - TAPPI PEERS - November 2020

Type: Papers and articles

Language: English

Format: pdf | 1.3 MB

All downloads

Chlorine dioxide safety and productivity boost at Iggesund

How the Nouryon team retrofitted Iggesund’s existing equipment, and helped steadily increase the efficiency of chlorine dioxide production

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