publication . Article . 2012

Clean production of corn stover pulp using KOH+NH4OH solution and its kinetic during delignification

Sun Yong; Yang Gang; Zhang Jin-Ping; Yao Ming-Shun;
Open Access
  • Published: 01 Jan 2012 Journal: Chemical Industry and Chemical Engineering Quarterly, volume 18, pages 137-145 (issn: 1451-9372, Copyright policy)
  • Publisher: National Library of Serbia
Abstract
The self-made KOH together with NH4OH pulping of corn stover was investigated. The combined alkaline system could effectively remove lignin during pulping. There are three stages of lignin removal during delginification. Approximately 90% of lignin could be removed after temperature reached 150ºC for over 30 minutes. The p-hydroxyl phenol groups in lignin could be completely removed during the delignification reaction. The tendency of the increase of the crystalline degree of cellulose is observed with increase of reaction temperature. The kinetics of delignification is found to be the first order with respect to the remained lignin and the 0.4 order with respec...
Subjects
Medical Subject Headings: technology, industry, and agriculturefood and beveragescomplex mixturesmacromolecular substancesfungi
free text keywords: General Chemical Engineering, Hydroxide, chemistry.chemical_compound, chemistry, Lignin, Phenol, Corn stover, Potassium, chemistry.chemical_element, Cellulose, Nitrogen, Organic chemistry, Pulp (paper), engineering.material, engineering, KOH+NH4OH, pulping, kinetics, Chemical engineering, TP155-156, Chemical industries, HD9650-9663
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publication . Article . 2012

Clean production of corn stover pulp using KOH+NH4OH solution and its kinetic during delignification

Sun Yong; Yang Gang; Zhang Jin-Ping; Yao Ming-Shun;