ALKALI REGENERATION PROCESS
The invention relates to an improvement in a method of regenerating alkaline or alkaline earth metal oxides or hydroxides from solution particularly in delignification processes wherein a suitable transition metal such as ferric oxide is burnt with the solution to produce a mixed oxide that is subse...
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| creator | COVEY, GEOFFREY H NGUYEN, KIEN L KEOGH, ANDREW J |
| description | The invention relates to an improvement in a method of regenerating alkaline or alkaline earth metal oxides or hydroxides from solution particularly in delignification processes wherein a suitable transition metal such as ferric oxide is burnt with the solution to produce a mixed oxide that is subsequently treated in hot water to regenerate the alkaline or alkaline earth metal oxide or hydroxide and precipitate the transition metal oxide. The improvement controls the presence of fines in the transition metal oxide to maintain these at an acceptable level in the fluidized bed combustion zone. This is achieved by contacting the fines with spent liquor from a delignification process. The invention also provides for the pelletization of the fine material of the transition metal oxide and spent delignification liquor can be used as a binder in the formation of such pellets. |
| format | Patent |
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The improvement controls the presence of fines in the transition metal oxide to maintain these at an acceptable level in the fluidized bed combustion zone. This is achieved by contacting the fines with spent liquor from a delignification process. The invention also provides for the pelletization of the fine material of the transition metal oxide and spent delignification liquor can be used as a binder in the formation of such pellets.</description><edition>4</edition><language>eng ; fre</language><subject>APPARATUS THEREFOR ; BLASTING ; CHEMISTRY ; COMBUSTION APPARATUS ; COMBUSTION PROCESSES ; COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM,RUBIDIUM, CAESIUM, OR FRANCIUM ; COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS ; CONSUMING WASTE PRODUCTS BY COMBUSTION ; CREMATION FURNACES ; HEATING ; INORGANIC CHEMISTRY ; LIGHTING ; MECHANICAL ENGINEERING ; METALLURGY ; PAPER-MAKING ; PRODUCTION OF CELLULOSE ; PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCESFROM CELLULOSE-CONTAINING MATERIALS ; REGENERATION OF PULPING LIQUORS ; TEXTILES ; WEAPONS</subject><creationdate>1985</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=19850611&DB=EPODOC&CC=CA&NR=1188485A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,778,883,25551,76302</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19850611&DB=EPODOC&CC=CA&NR=1188485A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>COVEY, GEOFFREY H</creatorcontrib><creatorcontrib>NGUYEN, KIEN L</creatorcontrib><creatorcontrib>KEOGH, ANDREW J</creatorcontrib><title>ALKALI REGENERATION PROCESS</title><description>The invention relates to an improvement in a method of regenerating alkaline or alkaline earth metal oxides or hydroxides from solution particularly in delignification processes wherein a suitable transition metal such as ferric oxide is burnt with the solution to produce a mixed oxide that is subsequently treated in hot water to regenerate the alkaline or alkaline earth metal oxide or hydroxide and precipitate the transition metal oxide. The improvement controls the presence of fines in the transition metal oxide to maintain these at an acceptable level in the fluidized bed combustion zone. This is achieved by contacting the fines with spent liquor from a delignification process. The invention also provides for the pelletization of the fine material of the transition metal oxide and spent delignification liquor can be used as a binder in the formation of such pellets.</description><subject>APPARATUS THEREFOR</subject><subject>BLASTING</subject><subject>CHEMISTRY</subject><subject>COMBUSTION APPARATUS</subject><subject>COMBUSTION PROCESSES</subject><subject>COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM,RUBIDIUM, CAESIUM, OR FRANCIUM</subject><subject>COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS</subject><subject>CONSUMING WASTE PRODUCTS BY COMBUSTION</subject><subject>CREMATION FURNACES</subject><subject>HEATING</subject><subject>INORGANIC CHEMISTRY</subject><subject>LIGHTING</subject><subject>MECHANICAL ENGINEERING</subject><subject>METALLURGY</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><subject>WEAPONS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1985</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZJB29PF29PFUCHJ1d_VzDXIM8fT3UwgI8nd2DQ7mYWBNS8wpTuWF0twM8m6uIc4euqkF-fGpxQWJyal5qSXxzo6GhhYWJhamjsaEVQAA2Pgfug</recordid><startdate>19850611</startdate><enddate>19850611</enddate><creator>COVEY, GEOFFREY H</creator><creator>NGUYEN, KIEN L</creator><creator>KEOGH, ANDREW J</creator><scope>EVB</scope></search><sort><creationdate>19850611</creationdate><title>ALKALI REGENERATION PROCESS</title><author>COVEY, GEOFFREY H ; NGUYEN, KIEN L ; KEOGH, ANDREW J</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_CA1188485A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; fre</language><creationdate>1985</creationdate><topic>APPARATUS THEREFOR</topic><topic>BLASTING</topic><topic>CHEMISTRY</topic><topic>COMBUSTION APPARATUS</topic><topic>COMBUSTION PROCESSES</topic><topic>COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM,RUBIDIUM, CAESIUM, OR FRANCIUM</topic><topic>COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS</topic><topic>CONSUMING WASTE PRODUCTS BY COMBUSTION</topic><topic>CREMATION FURNACES</topic><topic>HEATING</topic><topic>INORGANIC CHEMISTRY</topic><topic>LIGHTING</topic><topic>MECHANICAL ENGINEERING</topic><topic>METALLURGY</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><topic>WEAPONS</topic><toplevel>online_resources</toplevel><creatorcontrib>COVEY, GEOFFREY H</creatorcontrib><creatorcontrib>NGUYEN, KIEN L</creatorcontrib><creatorcontrib>KEOGH, ANDREW J</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>COVEY, GEOFFREY H</au><au>NGUYEN, KIEN L</au><au>KEOGH, ANDREW J</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>ALKALI REGENERATION PROCESS</title><date>1985-06-11</date><risdate>1985</risdate><abstract>The invention relates to an improvement in a method of regenerating alkaline or alkaline earth metal oxides or hydroxides from solution particularly in delignification processes wherein a suitable transition metal such as ferric oxide is burnt with the solution to produce a mixed oxide that is subsequently treated in hot water to regenerate the alkaline or alkaline earth metal oxide or hydroxide and precipitate the transition metal oxide. The improvement controls the presence of fines in the transition metal oxide to maintain these at an acceptable level in the fluidized bed combustion zone. This is achieved by contacting the fines with spent liquor from a delignification process. The invention also provides for the pelletization of the fine material of the transition metal oxide and spent delignification liquor can be used as a binder in the formation of such pellets.</abstract><edition>4</edition><oa>free_for_read</oa></addata></record> |
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| language | eng ; fre |
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| subjects | APPARATUS THEREFOR BLASTING CHEMISTRY COMBUSTION APPARATUS COMBUSTION PROCESSES COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM,RUBIDIUM, CAESIUM, OR FRANCIUM COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS CONSUMING WASTE PRODUCTS BY COMBUSTION CREMATION FURNACES HEATING INORGANIC CHEMISTRY LIGHTING MECHANICAL ENGINEERING METALLURGY PAPER-MAKING PRODUCTION OF CELLULOSE PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCESFROM CELLULOSE-CONTAINING MATERIALS REGENERATION OF PULPING LIQUORS TEXTILES WEAPONS |
| title | ALKALI REGENERATION PROCESS |
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