ALKALINE PULPING OF PREHYDROLYSED WHEAT-STRAW IN AQUEOUS-ORGANIC SOLVENT SYSTEMS AT LOW-TEMPERATURES

PAPATHEOPHANUS, MG; KOULLAS, DP; KOUKIOS, EG

dc.contributor.author	PAPATHEOPHANUS, MG	en
dc.contributor.author	KOULLAS, DP	en
dc.contributor.author	KOUKIOS, EG	en
dc.date.accessioned	2014-03-01T01:43:49Z
dc.date.available	2014-03-01T01:43:49Z
dc.date.issued	1995	en
dc.identifier.issn	0576-9787	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/24210
dc.subject.classification	Materials Science, Paper & Wood	en
dc.subject.other	ORGANOSOLV	en
dc.title	ALKALINE PULPING OF PREHYDROLYSED WHEAT-STRAW IN AQUEOUS-ORGANIC SOLVENT SYSTEMS AT LOW-TEMPERATURES	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	1995	en
heal.abstract	The effects of partial hemicelluloses fractionation by prehydrolysis on low-temperature organosolv pulping of wheat straw were examined. Prehydrolysis took place at 100 degrees in 1.43 N H2SO4 for 10-40 min. The pretreated material ras delignified in NaOH-containing (5-25% w/w dry solid basis) ethanol-water mixtures (35-100% v/v ethanol concentration). Optimal prehydrolysis, i.e. 30% hemicellulose removal, combined with pulping in 65% (v/v) EtOH were found to significantly, i.e. 8-25%, increase pulp mechanical properties. In addition, very high (95%) cellulose retention in the pulp and high delignification values (86%) were achieved at 55% overall yield. The selectivity of lignin vs. carbohydrate removal during delignification was doubled by the application of a prehydrolytic stage prior to pulping.	en
heal.publisher	EDITURA ACADEMIEI ROMANE	en
heal.journalName	CELLULOSE CHEMISTRY AND TECHNOLOGY	en
dc.identifier.isi	ISI:A1995RX09400004	en
dc.identifier.volume	29	en
dc.identifier.issue	1	en
dc.identifier.spage	29	en
dc.identifier.epage	40	en