REDUCTION OF CHLORIDE IN PULPING CHEMICAL RECOVERY SYSTEMS
PCT No. PCT/SE93/00688 Sec. 371 Date Feb. 23, 1995 Sec. 102(e) Date Feb. 23, 1995 PCT Filed Aug. 18, 1993 PCT Pub. No. WO94/04747 PCT Pub. Date Mar. 3, 1994The present invention relates to an environmental-friendly process for reducing the content of chloride in a liquor inventory of a chemical pulp...
Gespeichert in:
Hauptverfasser: | , |
---|---|
Format: | Patent |
Sprache: | eng ; fre ; ger |
Schlagworte: | |
Online-Zugang: | Volltext bestellen |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
container_end_page | |
---|---|
container_issue | |
container_start_page | |
container_title | |
container_volume | |
creator | LINDBERG, HANS SUNDBLAD, BIRGITTA |
description | PCT No. PCT/SE93/00688 Sec. 371 Date Feb. 23, 1995 Sec. 102(e) Date Feb. 23, 1995 PCT Filed Aug. 18, 1993 PCT Pub. No. WO94/04747 PCT Pub. Date Mar. 3, 1994The present invention relates to an environmental-friendly process for reducing the content of chloride in a liquor inventory of a chemical pulp mill. According to the invention, in a recovery system for pulping chemicals containing sulphur and an alkali metal, precipitator dust formed in a recovery boiler is collected and withdrawn, dissolved in water and electrolyzed for production of chlorine or hydrochloric acid in the anolyte. Since the dust normally contains a large amount of sodium sulphate, sulphuric acid and sodium hydroxide can also be produced in the electrolysis. To reduce the content of impurities, before the electrolysis, the pH of the aqueous solution is adjusted to above about 10 to precipitate inorganic substances which are separated-off together with flocculated or undissolved substances. |
format | Patent |
fullrecord | <record><control><sourceid>epo_EVB</sourceid><recordid>TN_cdi_epo_espacenet_EP0656083B1</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>EP0656083B1</sourcerecordid><originalsourceid>FETCH-epo_espacenet_EP0656083B13</originalsourceid><addsrcrecordid>eNrjZLAKcnUJdQ7x9PdT8HdTcPbw8Q_ydHFV8PRTCAj1CfD0cweKufp6Ojv6KAS5OvuHuQZFKgRHBoe4-gbzMLCmJeYUp_JCaW4GBTfXEGcP3dSC_PjU4oLE5NS81JJ41wADM1MzAwtjJ0NjIpQAAG4SKMI</addsrcrecordid><sourcetype>Open Access Repository</sourcetype><iscdi>true</iscdi><recordtype>patent</recordtype></control><display><type>patent</type><title>REDUCTION OF CHLORIDE IN PULPING CHEMICAL RECOVERY SYSTEMS</title><source>esp@cenet</source><creator>LINDBERG, HANS ; SUNDBLAD, BIRGITTA</creator><creatorcontrib>LINDBERG, HANS ; SUNDBLAD, BIRGITTA</creatorcontrib><description>PCT No. PCT/SE93/00688 Sec. 371 Date Feb. 23, 1995 Sec. 102(e) Date Feb. 23, 1995 PCT Filed Aug. 18, 1993 PCT Pub. No. WO94/04747 PCT Pub. Date Mar. 3, 1994The present invention relates to an environmental-friendly process for reducing the content of chloride in a liquor inventory of a chemical pulp mill. According to the invention, in a recovery system for pulping chemicals containing sulphur and an alkali metal, precipitator dust formed in a recovery boiler is collected and withdrawn, dissolved in water and electrolyzed for production of chlorine or hydrochloric acid in the anolyte. Since the dust normally contains a large amount of sodium sulphate, sulphuric acid and sodium hydroxide can also be produced in the electrolysis. To reduce the content of impurities, before the electrolysis, the pH of the aqueous solution is adjusted to above about 10 to precipitate inorganic substances which are separated-off together with flocculated or undissolved substances.</description><edition>6</edition><language>eng ; fre ; ger</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>1996</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=19960327&DB=EPODOC&CC=EP&NR=0656083B1$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25564,76547</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19960327&DB=EPODOC&CC=EP&NR=0656083B1$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>LINDBERG, HANS</creatorcontrib><creatorcontrib>SUNDBLAD, BIRGITTA</creatorcontrib><title>REDUCTION OF CHLORIDE IN PULPING CHEMICAL RECOVERY SYSTEMS</title><description>PCT No. PCT/SE93/00688 Sec. 371 Date Feb. 23, 1995 Sec. 102(e) Date Feb. 23, 1995 PCT Filed Aug. 18, 1993 PCT Pub. No. WO94/04747 PCT Pub. Date Mar. 3, 1994The present invention relates to an environmental-friendly process for reducing the content of chloride in a liquor inventory of a chemical pulp mill. According to the invention, in a recovery system for pulping chemicals containing sulphur and an alkali metal, precipitator dust formed in a recovery boiler is collected and withdrawn, dissolved in water and electrolyzed for production of chlorine or hydrochloric acid in the anolyte. Since the dust normally contains a large amount of sodium sulphate, sulphuric acid and sodium hydroxide can also be produced in the electrolysis. To reduce the content of impurities, before the electrolysis, the pH of the aqueous solution is adjusted to above about 10 to precipitate inorganic substances which are separated-off together with flocculated or undissolved substances.</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>1996</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZLAKcnUJdQ7x9PdT8HdTcPbw8Q_ydHFV8PRTCAj1CfD0cweKufp6Ojv6KAS5OvuHuQZFKgRHBoe4-gbzMLCmJeYUp_JCaW4GBTfXEGcP3dSC_PjU4oLE5NS81JJ41wADM1MzAwtjJ0NjIpQAAG4SKMI</recordid><startdate>19960327</startdate><enddate>19960327</enddate><creator>LINDBERG, HANS</creator><creator>SUNDBLAD, BIRGITTA</creator><scope>EVB</scope></search><sort><creationdate>19960327</creationdate><title>REDUCTION OF CHLORIDE IN PULPING CHEMICAL RECOVERY SYSTEMS</title><author>LINDBERG, HANS ; SUNDBLAD, BIRGITTA</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_EP0656083B13</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; fre ; ger</language><creationdate>1996</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>LINDBERG, HANS</creatorcontrib><creatorcontrib>SUNDBLAD, BIRGITTA</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>LINDBERG, HANS</au><au>SUNDBLAD, BIRGITTA</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>REDUCTION OF CHLORIDE IN PULPING CHEMICAL RECOVERY SYSTEMS</title><date>1996-03-27</date><risdate>1996</risdate><abstract>PCT No. PCT/SE93/00688 Sec. 371 Date Feb. 23, 1995 Sec. 102(e) Date Feb. 23, 1995 PCT Filed Aug. 18, 1993 PCT Pub. No. WO94/04747 PCT Pub. Date Mar. 3, 1994The present invention relates to an environmental-friendly process for reducing the content of chloride in a liquor inventory of a chemical pulp mill. According to the invention, in a recovery system for pulping chemicals containing sulphur and an alkali metal, precipitator dust formed in a recovery boiler is collected and withdrawn, dissolved in water and electrolyzed for production of chlorine or hydrochloric acid in the anolyte. Since the dust normally contains a large amount of sodium sulphate, sulphuric acid and sodium hydroxide can also be produced in the electrolysis. To reduce the content of impurities, before the electrolysis, the pH of the aqueous solution is adjusted to above about 10 to precipitate inorganic substances which are separated-off together with flocculated or undissolved substances.</abstract><edition>6</edition><oa>free_for_read</oa></addata></record> |
fulltext | fulltext_linktorsrc |
identifier | |
ispartof | |
issn | |
language | eng ; fre ; ger |
recordid | cdi_epo_espacenet_EP0656083B1 |
source | esp@cenet |
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 | REDUCTION OF CHLORIDE IN PULPING CHEMICAL RECOVERY SYSTEMS |
url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2024-12-24T20%3A02%3A33IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-epo_EVB&rft_val_fmt=info:ofi/fmt:kev:mtx:patent&rft.genre=patent&rft.au=LINDBERG,%20HANS&rft.date=1996-03-27&rft_id=info:doi/&rft_dat=%3Cepo_EVB%3EEP0656083B1%3C/epo_EVB%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_id=info:pmid/&rfr_iscdi=true |