Carbohydrate and Lignin Retention in Kraft Pulping Using a Complete Factorial Design

Science Direct Working Paper No S1574-0331(04)70868-1

4 Pages Posted: 7 Jun 2017 Last revised: 20 Jan 2018

See all articles by Pedro Fardim

Pedro Fardim

Universidade Estadual de Campinas (UNICAMP) - Instituto de Quimica

Nelson Durán

Universidade Estadual de Campinas (UNICAMP) - Instituto de Quimica

Date Written: August 2002

Abstract

A complete factorial design was employed to investigate lignin, cellulose and hemicellulose retention in laboratory kraft pulping of wood using thin chips and short pulping time.Active alkali, sulphidity, pulping temperature and heating rate were the pulping variables investigated. Glucose, xylose, mannose, galactose, arabinose and rhamnose in wood and pulp were quantified by HPLC-PAD after acid hydrolysis. Uronic acids and lignin were quantified by specific methods.The active alkali on wood was the variable that most affected the chemical retention of hemicelluloses and lignin. Cellulose retention, expressed as glucan, was not affected by the investigated variables, indicating that short pulping and thin chips probably favour its retention. Xylan was the hemicellulose that remained after pulping.

Keywords: Macromolecular Chemistry > Cellulose Paper and Textiles, macrochem/0208003

Suggested Citation

Fardim, Pedro and Durán, Nelson, Carbohydrate and Lignin Retention in Kraft Pulping Using a Complete Factorial Design (August 2002). Science Direct Working Paper No S1574-0331(04)70868-1, Available at SSRN: https://ssrn.com/abstract=2981233

Pedro Fardim (Contact Author)

Universidade Estadual de Campinas (UNICAMP) - Instituto de Quimica ( email )

C.P. 6154
13083-970
Brazil

Nelson Durán

Universidade Estadual de Campinas (UNICAMP) - Instituto de Quimica

C.P. 6154
13083-970
Brazil

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