PULP BLEACHING PROCESS

Bleaching of a lignocellulose-contg. matl. by the gas phase chlorination of a 20-40% (pref. 30%) pulp combined with displacement bleaching with ClO2 as an oxidation agent, is improved in that the spent liquor from the ClO2-stage is used as a displacing agent to dilute an unbleached or preliminarily...

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1. Verfasser:	GORAN ERIK ANNERGREN
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS THEREFOR PAPER-MAKING PRODUCTION OF CELLULOSE PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCESFROM CELLULOSE-CONTAINING MATERIALS REGENERATION OF PULPING LIQUORS TEXTILES
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creator	GORAN ERIK ANNERGREN
description	Bleaching of a lignocellulose-contg. matl. by the gas phase chlorination of a 20-40% (pref. 30%) pulp combined with displacement bleaching with ClO2 as an oxidation agent, is improved in that the spent liquor from the ClO2-stage is used as a displacing agent to dilute an unbleached or preliminarily O2-bleached pulp, the pulp is concentrated before the gas phase chlorination to a solids content >=30% (pref. >=40%), and the gas phase chlorination is carried ut at an elevated temp. pref. for less than 2 mins. Spent solns. from the ClO2-stage is utilised, whereby the total consumption of water is considerably reduced and the heat economy is improved.
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Spent solns. from the ClO2-stage is utilised, whereby the total consumption of water is considerably reduced and the heat economy is improved.</description><edition>2</edition><language>eng</language><subject>APPARATUS THEREFOR ; PAPER-MAKING ; PRODUCTION OF CELLULOSE ; PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCESFROM CELLULOSE-CONTAINING MATERIALS ; REGENERATION OF PULPING LIQUORS ; TEXTILES</subject><creationdate>1977</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19770203&DB=EPODOC&CC=AU&NR=8358175A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25564,76547</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19770203&DB=EPODOC&CC=AU&NR=8358175A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>GORAN ERIK ANNERGREN</creatorcontrib><title>PULP BLEACHING PROCESS</title><description>Bleaching of a lignocellulose-contg. matl. by the gas phase chlorination of a 20-40% (pref. 30%) pulp combined with displacement bleaching with ClO2 as an oxidation agent, is improved in that the spent liquor from the ClO2-stage is used as a displacing agent to dilute an unbleached or preliminarily O2-bleached pulp, the pulp is concentrated before the gas phase chlorination to a solids content >=30% (pref. >=40%), and the gas phase chlorination is carried ut at an elevated temp. pref. for less than 2 mins. Spent solns. from the ClO2-stage is utilised, whereby the total consumption of water is considerably reduced and the heat economy is improved.</description><subject>APPARATUS THEREFOR</subject><subject>PAPER-MAKING</subject><subject>PRODUCTION OF CELLULOSE</subject><subject>PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCESFROM CELLULOSE-CONTAINING MATERIALS</subject><subject>REGENERATION OF PULPING LIQUORS</subject><subject>TEXTILES</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1977</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZBALCPUJUHDycXV09vD0c1cICPJ3dg0O5mFgTUvMKU7lhdLcDPJuriHOHrqpBfnxqcUFicmpeakl8Y6hFsamFobmpo7GhFUAAD6CHmo</recordid><startdate>19770203</startdate><enddate>19770203</enddate><creator>GORAN ERIK ANNERGREN</creator><scope>EVB</scope></search><sort><creationdate>19770203</creationdate><title>PULP BLEACHING PROCESS</title><author>GORAN ERIK ANNERGREN</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_AU8358175A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>1977</creationdate><topic>APPARATUS THEREFOR</topic><topic>PAPER-MAKING</topic><topic>PRODUCTION OF CELLULOSE</topic><topic>PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCESFROM CELLULOSE-CONTAINING MATERIALS</topic><topic>REGENERATION OF PULPING LIQUORS</topic><topic>TEXTILES</topic><toplevel>online_resources</toplevel><creatorcontrib>GORAN ERIK ANNERGREN</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>GORAN ERIK ANNERGREN</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>PULP BLEACHING PROCESS</title><date>1977-02-03</date><risdate>1977</risdate><abstract>Bleaching of a lignocellulose-contg. matl. by the gas phase chlorination of a 20-40% (pref. 30%) pulp combined with displacement bleaching with ClO2 as an oxidation agent, is improved in that the spent liquor from the ClO2-stage is used as a displacing agent to dilute an unbleached or preliminarily O2-bleached pulp, the pulp is concentrated before the gas phase chlorination to a solids content >=30% (pref. >=40%), and the gas phase chlorination is carried ut at an elevated temp. pref. for less than 2 mins. 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subjects	APPARATUS THEREFOR PAPER-MAKING PRODUCTION OF CELLULOSE PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCESFROM CELLULOSE-CONTAINING MATERIALS REGENERATION OF PULPING LIQUORS TEXTILES
title	PULP BLEACHING PROCESS
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