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Aug 24, 2020 · Level 2 Papermaking - Chemical Pulping. This video supports the Level 2 Technical Certificate Fibres Unit. In this tutorial we map out the main pulping methods and explain the general mechanism...
- 19 min
- 5.7K
- Steven Mann
This video supports the Level 2 Technical Certificate in Papermaking History Unit. It discusses the raw materials used in early Papermaking and how they cha...
- 12 min
- 2048
- Steven Mann
Aug 12, 2020 · Asalam U Alaikum welcome to Chemical Engg by Shumas.This video is a part of 3 videos on paper and pulp manufacture. I had tried to cover as much as possible ...
- 9 min
- 5.8K
- Chemical Engg by Shumas
Chemical pulping is the most common type of refining process, extracting fibers from wood by cooking the material in a chemical solution and increasing pressure. This type of processing yields a high-quality pulp (40-55% yield) but produces lower-quality paper (office paper).
Chemical pulping is the most common pulping process (Krotscheck, 2006; Casey, 1983b). It involves “cooking” of raw materials using aqueous chemical solutions and elevated temperature and pressure to extract pulp fibers.
The defibration of wood and nonwood into individual fibers by mechanical and or chemical treatment or in combination with both treatments is called pulping process. Chemical pulping involves the dissolution of lignin from the cell wall of lignocelluloses and liberates cellulosic fibers.
People also ask
What is chemical pulping & how does it work?
What is Chemimechanical pulping process?
What is chemical pulp used for?
What is the kraft pulping process?
What are the benefits of chemical pulping?
What is the difference between semichemical and Chemimechanical pulping?
The kraft pulping process involves cooking wood chips or other lignocellulosic materials in an alkaline solution of sodium hydroxide and sodium sulfide (known as “white liquor”) under high temperature and pressure in a large vessel called a digester.
