Pulp and Paper

Pulp and Paper

Lime is a key raw material in the production of precipitated calcium carbonate (PCC). It is used in a lot of paper we encounter every day; notepaper, printed magazines, newspaper and more. Our Britelim® lime exceptional physical and brightening characteristics are used to produce high-quality PCC-containing paper.

High-purity quicklime with specific chemical characteristics and granulometry enters into the causticizing process of pulp.

Process water and waste water resulting from pulp and papermaking require on-site treatment 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, runnability and printability.

Pulp causticizing

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.