The effects of hot water pre-extraction and alkaline catalyzed on soda-AQ pulping of kenaf whole stem

In the present study the effects of hot water pre-extraction and alkaline catalyzed were evaluated on soda-aq pulping of kenaf whole stem. In this respect, following kenaf chips pre-extraction at various temperature and time conditions, pulp preparation were carried out on oven-dried weight loss lev...

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Autores principales:	Mohammad taghi Asdolah zadeh, Hossein Resalti, Ali Ghasemian
Formato:	article
Lenguaje:	FA
Publicado:	Regional Information Center for Science and Technology (RICeST) 2011
Materias:	kenaf pre-extraction soda-AQ yield kappa number Forestry SD1-669.5
Acceso en línea:	https://doaj.org/article/3cdbf919b4bd45a7820324ae595e40c5
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spelling	oai:doaj.org-article:3cdbf919b4bd45a7820324ae595e40c52021-12-02T02:01:57ZThe effects of hot water pre-extraction and alkaline catalyzed on soda-AQ pulping of kenaf whole stem1735-09132383-112X10.22092/ijwpr.2011.117200https://doaj.org/article/3cdbf919b4bd45a7820324ae595e40c52011-09-01T00:00:00Zhttp://ijwpr.areeo.ac.ir/article_117200_f6038eb7514bffe4f44f7b40b5c1d605.pdfhttps://doaj.org/toc/1735-0913https://doaj.org/toc/2383-112XIn the present study the effects of hot water pre-extraction and alkaline catalyzed were evaluated on soda-aq pulping of kenaf whole stem. In this respect, following kenaf chips pre-extraction at various temperature and time conditions, pulp preparation were carried out on oven-dried weight loss levels of 8.5, 11.5 and 14.5 % of the samples, and the reference untreated kenaf chips performed by using Soda-AQ at 3 levels of H-factors ( 983, 1408 and 1832 hours). Results indicated that kenaf chips weight losses increased while the pre-extracted pH decreased as pre-extraction temperature and time increased. The required H-factor for achieving certain level of weight loss was reduced by adding small amounts of alkali (0.15 % on oven dried kenaf) on hot water extraction stage. The Pulp yields were reduced by increasing cooking H-factor and extracted weight loss. Averages comparison indicated that significant differences were observed, at 95% confidence, between the pulp yield and kappa number from reference pulp and pre-extracted pulp samples at levels of about 8.5, 11.5 and 14.5 %, and pulp yields and their kappa number were higher in reference pulps than pre-extracted samples. In addition, pulp yield average was higher in pre-extracted samples by alkaline catalyzed than pre-extracted samples by hot water, however, no significant differences were observed between their kappa number average. Meanwhile, to obtain a certain (similar) kappa number, pre-extracted kenaf chips in comparison with reference untreated kenaf chips require lower H-factor.Mohammad taghi Asdolah zadehHossein ResaltiAli GhasemianRegional Information Center for Science and Technology (RICeST)articlekenafpre-extractionsoda-AQyieldkappa numberForestrySD1-669.5FAتحقیقات علوم چوب و کاغذ ایران, Vol 26, Iss 3, Pp 437-453 (2011)
institution	DOAJ
collection	DOAJ
language	FA
topic	kenaf pre-extraction soda-AQ yield kappa number Forestry SD1-669.5
spellingShingle	kenaf pre-extraction soda-AQ yield kappa number Forestry SD1-669.5 Mohammad taghi Asdolah zadeh Hossein Resalti Ali Ghasemian The effects of hot water pre-extraction and alkaline catalyzed on soda-AQ pulping of kenaf whole stem
description	In the present study the effects of hot water pre-extraction and alkaline catalyzed were evaluated on soda-aq pulping of kenaf whole stem. In this respect, following kenaf chips pre-extraction at various temperature and time conditions, pulp preparation were carried out on oven-dried weight loss levels of 8.5, 11.5 and 14.5 % of the samples, and the reference untreated kenaf chips performed by using Soda-AQ at 3 levels of H-factors ( 983, 1408 and 1832 hours). Results indicated that kenaf chips weight losses increased while the pre-extracted pH decreased as pre-extraction temperature and time increased. The required H-factor for achieving certain level of weight loss was reduced by adding small amounts of alkali (0.15 % on oven dried kenaf) on hot water extraction stage. The Pulp yields were reduced by increasing cooking H-factor and extracted weight loss. Averages comparison indicated that significant differences were observed, at 95% confidence, between the pulp yield and kappa number from reference pulp and pre-extracted pulp samples at levels of about 8.5, 11.5 and 14.5 %, and pulp yields and their kappa number were higher in reference pulps than pre-extracted samples. In addition, pulp yield average was higher in pre-extracted samples by alkaline catalyzed than pre-extracted samples by hot water, however, no significant differences were observed between their kappa number average. Meanwhile, to obtain a certain (similar) kappa number, pre-extracted kenaf chips in comparison with reference untreated kenaf chips require lower H-factor.
format	article
author	Mohammad taghi Asdolah zadeh Hossein Resalti Ali Ghasemian
author_facet	Mohammad taghi Asdolah zadeh Hossein Resalti Ali Ghasemian
author_sort	Mohammad taghi Asdolah zadeh
title	The effects of hot water pre-extraction and alkaline catalyzed on soda-AQ pulping of kenaf whole stem
title_short	The effects of hot water pre-extraction and alkaline catalyzed on soda-AQ pulping of kenaf whole stem
title_full	The effects of hot water pre-extraction and alkaline catalyzed on soda-AQ pulping of kenaf whole stem
title_fullStr	The effects of hot water pre-extraction and alkaline catalyzed on soda-AQ pulping of kenaf whole stem
title_full_unstemmed	The effects of hot water pre-extraction and alkaline catalyzed on soda-AQ pulping of kenaf whole stem
title_sort	effects of hot water pre-extraction and alkaline catalyzed on soda-aq pulping of kenaf whole stem
publisher	Regional Information Center for Science and Technology (RICeST)
publishDate	2011
url	https://doaj.org/article/3cdbf919b4bd45a7820324ae595e40c5
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The effects of hot water pre-extraction and alkaline catalyzed on soda-AQ pulping of kenaf whole stem

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