Advantages And Disadvantages Of Pulping

Pulping is a various processes by which wood or other fibrous feedstocks convert into a product mass with liberated fibers. These thermal conversions can be accomplished both chemically or mechanically, or by combining the two treatments. Although pulps are predominantly utilized for papermaking industry, some pulps are processed in various cellulose derivatives and regenerated celluloses.
Chemical pulping can be described as a method to remove lignin (delignification) from wood using chemical solution and through chemical degradation. This method also has the objective of minimizing damage to the cellulose of the wood and thus maintain the pulp strength properties. This method separated fibers by dissolving away lignin component, maintain fibers and most of the cellulose and some hemicelluloses retained behind. The resulted pulp often called as chemical pulp, referring to the chemical pulping process. Kraft, sulfite and soda are three major chemical pulping methods known today.

Kraft Pulping
Kraft process are often called kraft pulping is the most used chemical pulping in the pulp and paper industry. The main reason for the dominance of the kraft process, compared to other processes, is excellent pulp strength properties, low demand on wood species and wood quality, well-established recovery of cooking chemicals, energy, and by-products, and short cooking time. In this process, wood chips are cooked with sufficient chemicals in an aqueous solution at adequate temperature