CO2 for paper Neutralisation

Improve the process using carbon dioxide for pH neutralisation.

Application of CO2 for paper mill production optimisation

We can find different paper production line phases at which the application of CO2 for pH secure acidification leads to a relevant improvement by upgrading the drainage or recovering chemicals.

Wash delignified pulp

Wash delignified pulp

Reduce the pH of the pulp to have a better draining

Kraft pulp pH control

Kraft pulp pH control

Replace of the strong acids to providing a smoother control

Tissue paper pH control

Tissue paper pH control

La CO2 può essere utilizzata per il controllo del pH della cellulosa in due punti diversi

Flotation system improvement

Flotation system improvement

Replace part of the compressed air with CO2 as a carrier gas during the flotation

PCC production

PCC production

CO2 is used to produce Precipitated Calcium Carbonate for print paper production

Kraft pulp pH control tower

Kraft pulp pH control tower

If the washed cellulose is subsequently bleached, CO2 also makes it possible to reduce the amount of chlorine-based agents used in the first stage (CDO).

Replacement of strong acids

CO2 can also be used after the cellulose refining process to fine-tune the pH level.

CO2 is generally used as a substitute for strong acids (H2SO4), SO2 and aluminium sulphate, as it allows for more precise control and prevents large fluctuations in pH levels. It also reduces the consumption of aluminium sulphate, which is added to control the pH, thereby partially replacing it.

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