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Effect of pulping and bleaching on pulp carbohydrates and technical properties.
KTH, Skolan för kemivetenskap (CHE), Fiber- och polymerteknik, Träkemi och massateknologi.
Vise andre og tillknytning
1996 (engelsk)Inngår i: Proceedings Int. Pulp Bleaching, 1996, s. 39-42Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

Pulping and bleaching have a profound effect on the carbohydrate chem. of kraft pulps.  The chem. structure of xylan is modified due to the conversion of methylglucuronic acid side groups to hexenuronic acid side groups.  Pulping conditions strongly affect the amt. of hexenuronic acid present in the pulp and subsequently modified kraft pulps have different carboxyl group profiles as compared with conventionally cooked pulps.  Due to its reactivity, hexenuronic acid is readily degraded when chlorine dioxide or ozone are used as bleaching chems.  However, TCF-pulps bleached with peroxide and oxygen contain high amts. of hexenuronic acid.  Thus, depending on the pulping and bleaching method, the quality and quantity of carboxylic acids in different types of pulps varies significantly.  The differences in the uronic acid content are in turn reflected in the macroscale properties of the pulps, such as brightness stability.       

sted, utgiver, år, opplag, sider
1996. s. 39-42
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-79833OAI: oai:DiVA.org:kth-79833DiVA, id: diva2:497950
Konferanse
International Pulp Bleaching Conference, Washington, D. C., Apr. 14-18, 1996 (1996), 1, 39-42.
Merknad
NR 20140805Tilgjengelig fra: 2012-02-11 Laget: 2012-02-09 Sist oppdatert: 2012-02-11bibliografisk kontrollert

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