High temperature peroxide bleaching of mechanical pulps
A method of making bleached mechanical pulps is disclosed for pulping mills having a primary and a secondary refiner. A first step (100) is to provide cellulosic materials, such as wood chips to refine into the pulp; the wood chips have an initial brightness level. A second step (102) is to provide...
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| creator | KAAREN K HAYNES RODGER O CAMPBELL ANTHONY PARRISH ROBERT T HAMILTON ZEECHA L BROOKS |
| description | A method of making bleached mechanical pulps is disclosed for pulping mills having a primary and a secondary refiner. A first step (100) is to provide cellulosic materials, such as wood chips to refine into the pulp; the wood chips have an initial brightness level. A second step (102) is to provide a bleaching liquor to the refining system of the pulp mill, wherein the liquor comprises an amount of hydrogen peroxide and an amount of alkali having greater than 0% to 100% magnesium hydroxide or soda ash or a combination thereof. A third step (104,106) is to hold the pulp with the bleaching liquor at a temperature in the range of about 85 DEG to about 160 DEG C and for about 2 to about 180 minutes. |
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A first step (100) is to provide cellulosic materials, such as wood chips to refine into the pulp; the wood chips have an initial brightness level. A second step (102) is to provide a bleaching liquor to the refining system of the pulp mill, wherein the liquor comprises an amount of hydrogen peroxide and an amount of alkali having greater than 0% to 100% magnesium hydroxide or soda ash or a combination thereof. A third step (104,106) is to hold the pulp with the bleaching liquor at a temperature in the range of about 85 DEG to about 160 DEG C and for about 2 to about 180 minutes.</description><edition>7</edition><language>eng</language><subject>APPARATUS THEREFOR ; FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT ; PAPER-MAKING ; PRODUCTION OF CELLULOSE ; PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCESFROM CELLULOSE-CONTAINING MATERIALS ; REGENERATION OF PULPING LIQUORS ; TEXTILES ; TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKINGMACHINE</subject><creationdate>2002</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=20021121&DB=EPODOC&CC=AU&NR=3816102A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25564,76547</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20021121&DB=EPODOC&CC=AU&NR=3816102A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>KAAREN K HAYNES</creatorcontrib><creatorcontrib>RODGER O CAMPBELL</creatorcontrib><creatorcontrib>ANTHONY PARRISH</creatorcontrib><creatorcontrib>ROBERT T HAMILTON</creatorcontrib><creatorcontrib>ZEECHA L BROOKS</creatorcontrib><title>High temperature peroxide bleaching of mechanical pulps</title><description>A method of making bleached mechanical pulps is disclosed for pulping mills having a primary and a secondary refiner. 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| language | eng |
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| subjects | APPARATUS THEREFOR FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT PAPER-MAKING PRODUCTION OF CELLULOSE PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCESFROM CELLULOSE-CONTAINING MATERIALS REGENERATION OF PULPING LIQUORS TEXTILES TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKINGMACHINE |
| title | High temperature peroxide bleaching of mechanical pulps |
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