Preparation of Dissolving Pulp from Sugar Cane Bagasse, and its Acetylation Under Homogeneous Solution Condition

Autor:	A. M. A. Nada, O. A. El Seoud, A. A. Ibrahim, U. Hagemann
Rok vydání:	1996
Předmět:	inorganic chemicals Materials science chemistry.chemical_element Sulfuric acid Anthraquinone Catalysis Biomaterials chemistry.chemical_compound chemistry Acetyl chloride Sodium hydroxide Chlorine Composite material Bagasse Dissolving pulp Nuclear chemistry
Zdroj:	hfsg. 50:221-225
ISSN:	1437-434X 0018-3830
DOI:	10.1515/hfsg.1996.50.3.221
Popis:	Optimized conditions for preparation of dissolving pulp from sugar cane bagasse are : sulfuric acid prehydrolysis for 90 minutes at 120°C, followed by sodium hydroxide pulping for 120 minutes at 165°C, in the presence of 0,05% anthraquinone catalyst, followed by a four-stage conventional chlorine-based bleaching. The α-cellulose content, ash content, and degree of polymerization of the produced dissolving pulp are : > 95%, < 0.15% and 780, respectively. It was acetylated under homogeneous solution condition, its reaction with acetyl chloride in 9% LiCl/N,N-dimethylacetamide, in the presence of pyridine, or N,N-dimethyl-aniline catalyst, yielded acetate esters whose degree of acetylation is 2.65 ± 0.10, with no degradation of the natural polymer.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8ab4c471fd47ebee9d41ec6d255a1696 https://doi.org/10.1515/hfsg.1996.50.3.221 Zobrazit plný text záznamu