Pulp and Paper

Pulp paper

Pulp and Paper

Lime is instrumental in creating high-quality paper of various thicknesses. It is used in much of the paper we encounter every day; notepaper, printed magazines, newspaper and more. Lime acts as a filler and coating in the manufacture of pulp and paper, particularly in the production of precipitated calcium carbonate (PCC). Our Britelim® product possesses exceptional physical and brightening characteristics, which leads to the production of high-quality paper. Caustification is lime’s third main application in the paper making process.

In the paper making process, waste water, process water and recycling water always need to be treated first before being reused or discharged.

Tailor-made precipitated calcium carbonate (PCC)

We supply high-purity, high-brightness lime for the fabrication of PCC (precipitated calcium carbonate). PCC is manufactured via a series of controlled chemical reactions. Quicklime is mixed with water to form a milk of lime (lime slurry) to which carbon dioxide gas is added. The resulting reaction produces a very fine precipitated calcium carbonate (CaCO3). The shape and size of the PCC crystals are modified by precipitation conditions (temperature/concentration) during the reaction. This tailor-made filler is used in paper production to enhance paper's brightness, opacity, bulk and texture.

Pulp caustification

Lime is traditionally used to regenerate caustic soda (white liquor) from the sodium carbonate (green liquor) left over from the kraft pulp-making process. Mixing sodium carbonate with hydrated lime creates, by chemical reaction, calcium carbonate and caustic soda.