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The Kappa number is determined by ISO 302:2004. [1] ISO 302 is applicable to all kinds of chemical and semi-chemical pulps and gives a Kappa number in the range of 1–100. . The Kappa number is a measurement of standard potassium permanganate solution that the pulp will consu
The lignin is degraded and becomes more watersoluble and thereby more easy to wash away from the pulp, while the anthraquinone is regenerated. This process gives an increase in yield of pulp, typically 1–3% and a reduction in kappa number. [8]
Kappa (/ ˈ k æ p ə /; [1] uppercase Κ, lowercase κ or cursive ϰ; Greek: κάππα, káppa) is the tenth letter of the Greek alphabet, representing the voiceless velar plosive IPA: sound in Ancient and Modern Greek.
The main method of destroying hexenuronic acid is to treat the wood pulp post kraft processing with strong acids at high temperatures. HexA is hydrolyzed and broken down into aldehydes and alcohols like 2-furoic acid and 5-carboxy-2-furaldehdye. [3] [2] This process has led to a 50% reduction in bleaching costs of the wood pulp in some cases. [2]
Cohen's kappa, also known as Kappa statistic Fleiss' kappa , another measure of inter-annotator agreement Kappa number , a measure of lignin content in wood pulp
In coordination chemistry, denticity (from Latin dentis 'tooth') refers to the number of donor groups in a given ligand that bind to the central metal atom in a coordination complex. [ 1 ] [ 2 ] In many cases, only one atom in the ligand binds to the metal, so the denticity equals one, and the ligand is said to be unidentate or monodentate .
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Dissolving pulp is mainly produced chemically from pulpwood in a process that has a low yield (30 - 35% of the wood). This makes up of about 85 - 88% of the production. [2] Dissolving pulp is made from the sulfite process or the kraft process with an acid prehydrolysis step to remove hemicelluloses. For the highest quality, it should be derived ...