The effect of consistency on the optical properties of hydrogen peroxide bleached CMP pulp

Using high consistency pulp especially in bleaching plant is highly attractive due to considerable reduction in energy and water consumptions and low effluent volume. This research investigates the effect of consistency CMP pulp on bleaching by hydrogen peroxide. For this purpose, unbleached mixed h...

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Autores principales:	Somayeh Ghasemi, Rabie Behroz
Formato:	article
Lenguaje:	FA
Publicado:	Regional Information Center for Science and Technology (RICeST) 2011
Materias:	CMP Pulp hydrogen peroxide consistency Optical properties brightness yellowness OPACITY Forestry SD1-669.5
Acceso en línea:	https://doaj.org/article/2d54f0f138dc438cb227497a73b5c346
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spelling	oai:doaj.org-article:2d54f0f138dc438cb227497a73b5c3462021-12-02T11:55:25ZThe effect of consistency on the optical properties of hydrogen peroxide bleached CMP pulp1735-09132383-112X10.22092/ijwpr.2011.117196https://doaj.org/article/2d54f0f138dc438cb227497a73b5c3462011-06-01T00:00:00Zhttp://ijwpr.areeo.ac.ir/article_117196_a592170704ea7cedd4a2aeb68aa4b0a8.pdfhttps://doaj.org/toc/1735-0913https://doaj.org/toc/2383-112XUsing high consistency pulp especially in bleaching plant is highly attractive due to considerable reduction in energy and water consumptions and low effluent volume. This research investigates the effect of consistency CMP pulp on bleaching by hydrogen peroxide. For this purpose, unbleached mixed hardwood CMP pulp of Mazandaran wood and paper CO. mill was used. Bleaching was carried out with QP sequences. Pretreatment or Q stage was carried out by DTPA as a chelating agent for removing transition metals. Chelating stage had a similar condition for all pulps. bleaching with hydrogen peroxide was carried out in three levels of hydrogen peroxide 2, 3, 4% and proportion NaOH to H2O2: 0.8, 0.7, 0.6 by adding 3% sodium silicate in 70˚C and 150min at four consistency level (10, 15, 25 and 30%). After bleaching, handsheets were made with grammage 60gr/m2 from bleached pulp. The experimental results showed that high brightness and opacity and lower yellowness was obtained at 30% consistency by 2 and 3% peroxide charge. However, by using 4% hydrogen peroxide, higher brightness and lower yellowness attained at 25% consistency. Brightness is increased continuously by increasing consistency from 10 to 30% at 2, 3% peroxide. But at 4% peroxide charge, brightness is increased from 10, 15 and 25%, and then at 30% consistency is decreased significantly. Also under conditioning of 2% peroxide and 30% consistency and 2% peroxide at 25% consistency can obtain similar brightness to 3% peroxide and 25% consistency and 4% peroxide at 10% consistency. That it means of 25, 30% decrease in consumption peroxide and sodium hydroxide.Somayeh GhasemiRabie BehrozRegional Information Center for Science and Technology (RICeST)articleCMP Pulphydrogen peroxideconsistencyOptical propertiesbrightnessyellownessOPACITYForestrySD1-669.5FAتحقیقات علوم چوب و کاغذ ایران, Vol 26, Iss 2, Pp 298-409 (2011)
institution	DOAJ
collection	DOAJ
language	FA
topic	CMP Pulp hydrogen peroxide consistency Optical properties brightness yellowness OPACITY Forestry SD1-669.5
spellingShingle	CMP Pulp hydrogen peroxide consistency Optical properties brightness yellowness OPACITY Forestry SD1-669.5 Somayeh Ghasemi Rabie Behroz The effect of consistency on the optical properties of hydrogen peroxide bleached CMP pulp
description	Using high consistency pulp especially in bleaching plant is highly attractive due to considerable reduction in energy and water consumptions and low effluent volume. This research investigates the effect of consistency CMP pulp on bleaching by hydrogen peroxide. For this purpose, unbleached mixed hardwood CMP pulp of Mazandaran wood and paper CO. mill was used. Bleaching was carried out with QP sequences. Pretreatment or Q stage was carried out by DTPA as a chelating agent for removing transition metals. Chelating stage had a similar condition for all pulps. bleaching with hydrogen peroxide was carried out in three levels of hydrogen peroxide 2, 3, 4% and proportion NaOH to H2O2: 0.8, 0.7, 0.6 by adding 3% sodium silicate in 70˚C and 150min at four consistency level (10, 15, 25 and 30%). After bleaching, handsheets were made with grammage 60gr/m2 from bleached pulp. The experimental results showed that high brightness and opacity and lower yellowness was obtained at 30% consistency by 2 and 3% peroxide charge. However, by using 4% hydrogen peroxide, higher brightness and lower yellowness attained at 25% consistency. Brightness is increased continuously by increasing consistency from 10 to 30% at 2, 3% peroxide. But at 4% peroxide charge, brightness is increased from 10, 15 and 25%, and then at 30% consistency is decreased significantly. Also under conditioning of 2% peroxide and 30% consistency and 2% peroxide at 25% consistency can obtain similar brightness to 3% peroxide and 25% consistency and 4% peroxide at 10% consistency. That it means of 25, 30% decrease in consumption peroxide and sodium hydroxide.
format	article
author	Somayeh Ghasemi Rabie Behroz
author_facet	Somayeh Ghasemi Rabie Behroz
author_sort	Somayeh Ghasemi
title	The effect of consistency on the optical properties of hydrogen peroxide bleached CMP pulp
title_short	The effect of consistency on the optical properties of hydrogen peroxide bleached CMP pulp
title_full	The effect of consistency on the optical properties of hydrogen peroxide bleached CMP pulp
title_fullStr	The effect of consistency on the optical properties of hydrogen peroxide bleached CMP pulp
title_full_unstemmed	The effect of consistency on the optical properties of hydrogen peroxide bleached CMP pulp
title_sort	effect of consistency on the optical properties of hydrogen peroxide bleached cmp pulp
publisher	Regional Information Center for Science and Technology (RICeST)
publishDate	2011
url	https://doaj.org/article/2d54f0f138dc438cb227497a73b5c346
work_keys_str_mv	AT somayehghasemi theeffectofconsistencyontheopticalpropertiesofhydrogenperoxidebleachedcmppulp AT rabiebehroz theeffectofconsistencyontheopticalpropertiesofhydrogenperoxidebleachedcmppulp AT somayehghasemi effectofconsistencyontheopticalpropertiesofhydrogenperoxidebleachedcmppulp AT rabiebehroz effectofconsistencyontheopticalpropertiesofhydrogenperoxidebleachedcmppulp
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The effect of consistency on the optical properties of hydrogen peroxide bleached CMP pulp

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