Category Archives: Lignin

Kappa number of pulp

Posted on November 25, 2016 by admin

The Kappa number of pulp is an indication of the lignin content or bleachability of pulp. We use it to estimate the required amount of bleach chemicals to achieve targeted brightness. If the kappa number value is higher then, the required bleaching chemicals are also higher. On the Read more

Posted in Lignin, Pulp Mill | Tagged , , , , , | 8 Comments

Oxygen delignification process

Posted on July 28, 2015 by admin

Oxygen Delignification is one of the most significant and well proven pulp bleaching process for ECF (elemental chlorine free) and TCF (total chlorine free) bleached pulp production. It is the first stage of the bleaching process; in this case oxygen and alkali are used to eliminate a Read more

Posted in Lignin, pulp bleaching, Pulp Mill | Tagged , , , , , , | 16 Comments

The chemical reactions in Kraft pulping process

Posted on June 30, 2015 by admin

Kraft pulping process is the most used pulping process in the world. In this process lignin goes into the reactions with the cooking liquor chemicals and split into fragment. These fragments dissolved with the solution and wood disintegrates into fiber. During the kraft pulping process about 80 Read more

Posted in Lignin, Pulp Mill, Pulping Process | Tagged , , , , , | 4 Comments

Lignin structure, properties, function and uses

Posted on May 28, 2015 by admin

Lignin is an aromatic complex polymer of monolignols (aromatic alcohols) which is found in plant cell walls. Later than cellulose, lignin is the most abundant natural polymer in the planet. It is not composed of carbohydrate monomers whereas the rest of polymers found in plant cell walls are Read more

Posted in Lignin, Pulp Mill | Tagged , , , , , , , , | 7 Comments