Lime is use as a causticizing agent in sulfate plants. During the sulfate process, lime reacts with the waste sodium carbonate and generate caustic soda. CAO provides high calcium lump lime
that suitable for sulfate process.
CAO also supplies high calcium lump lime for paper bleaching process. Lime is added with chlorine to form calcium hypochlorite. Calcium Hypochlorite is then use to bleach the pulp to the desired degree of whiteness.