NITROGEN OXIDE STORAGE CATALYST, AND MANUFACTURE THEREOF AND ITS USE
PROBLEM TO BE SOLVED: To increase a load of a stored compound by a method wherein in a nitrogen oxide storage catalyst containing a fine catalytic material and a nitrogen oxide storage constituent, the nitrogen oxide storage constituent is so provided as to exist as fine barium sulfate and strontium...
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| creator | STREHLAU WOLFGANG DR GOEBEL ULRICH DOMESLE RAINER DR |
| description | PROBLEM TO BE SOLVED: To increase a load of a stored compound by a method wherein in a nitrogen oxide storage catalyst containing a fine catalytic material and a nitrogen oxide storage constituent, the nitrogen oxide storage constituent is so provided as to exist as fine barium sulfate and strontium sulfate after end of manufacturing the catalyst. SOLUTION: In a nitrogen oxide storage catalyst wherein a catalyst so structured as to provide a cover 2 on an inactive support 1 to be used for purifying an exhaust gas of a lean engine or the like, contains fine catalytic materials 3, 4 and a nitrogen oxide storing constituent 5, the nitrogen oxide storing constituent 5 is so formed as to exist as fine barium sulfate, and strontium sulfate, after end of manufacturing the catalyst, further a mixture or a mixed crystal of both sulfates, or as a decomposition product having at most 1 μm in average particle size. As the material 3, an activated aluminum oxide activated by use of platinum is used, and as the material 4, a constituent for storing oxygen or cerium/zirconium mixed oxide activated by use of rhodium is used. |
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SOLUTION: In a nitrogen oxide storage catalyst wherein a catalyst so structured as to provide a cover 2 on an inactive support 1 to be used for purifying an exhaust gas of a lean engine or the like, contains fine catalytic materials 3, 4 and a nitrogen oxide storing constituent 5, the nitrogen oxide storing constituent 5 is so formed as to exist as fine barium sulfate, and strontium sulfate, after end of manufacturing the catalyst, further a mixture or a mixed crystal of both sulfates, or as a decomposition product having at most 1 μm in average particle size. As the material 3, an activated aluminum oxide activated by use of platinum is used, and as the material 4, a constituent for storing oxygen or cerium/zirconium mixed oxide activated by use of rhodium is used.</description><edition>7</edition><language>eng</language><subject>CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY ; PERFORMING OPERATIONS ; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL ; SEPARATION ; THEIR RELEVANT APPARATUS ; TRANSPORTING</subject><creationdate>2000</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=20000425&DB=EPODOC&CC=JP&NR=2000117110A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25543,76293</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20000425&DB=EPODOC&CC=JP&NR=2000117110A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>STREHLAU WOLFGANG DR</creatorcontrib><creatorcontrib>GOEBEL ULRICH</creatorcontrib><creatorcontrib>DOMESLE RAINER DR</creatorcontrib><title>NITROGEN OXIDE STORAGE CATALYST, AND MANUFACTURE THEREOF AND ITS USE</title><description>PROBLEM TO BE SOLVED: To increase a load of a stored compound by a method wherein in a nitrogen oxide storage catalyst containing a fine catalytic material and a nitrogen oxide storage constituent, the nitrogen oxide storage constituent is so provided as to exist as fine barium sulfate and strontium sulfate after end of manufacturing the catalyst. SOLUTION: In a nitrogen oxide storage catalyst wherein a catalyst so structured as to provide a cover 2 on an inactive support 1 to be used for purifying an exhaust gas of a lean engine or the like, contains fine catalytic materials 3, 4 and a nitrogen oxide storing constituent 5, the nitrogen oxide storing constituent 5 is so formed as to exist as fine barium sulfate, and strontium sulfate, after end of manufacturing the catalyst, further a mixture or a mixed crystal of both sulfates, or as a decomposition product having at most 1 μm in average particle size. As the material 3, an activated aluminum oxide activated by use of platinum is used, and as the material 4, a constituent for storing oxygen or cerium/zirconium mixed oxide activated by use of rhodium is used.</description><subject>CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY</subject><subject>PERFORMING OPERATIONS</subject><subject>PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL</subject><subject>SEPARATION</subject><subject>THEIR RELEVANT APPARATUS</subject><subject>TRANSPORTING</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2000</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZHDx8wwJ8nd39VPwj_B0cVUIDvEPcnR3VXB2DHH0iQwO0VFw9HNR8HX0C3VzdA4JDXJVCPFwDXL1dwOLe4YEK4QGu_IwsKYl5hSn8kJpbgYlN9cQZw_d1IL8-NTigsTk1LzUknivACMDAwNDQ3NDQwNHY6IUAQCf7Svp</recordid><startdate>20000425</startdate><enddate>20000425</enddate><creator>STREHLAU WOLFGANG DR</creator><creator>GOEBEL ULRICH</creator><creator>DOMESLE RAINER DR</creator><scope>EVB</scope></search><sort><creationdate>20000425</creationdate><title>NITROGEN OXIDE STORAGE CATALYST, AND MANUFACTURE THEREOF AND ITS USE</title><author>STREHLAU WOLFGANG DR ; GOEBEL ULRICH ; DOMESLE RAINER DR</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_JP2000117110A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2000</creationdate><topic>CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY</topic><topic>PERFORMING OPERATIONS</topic><topic>PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL</topic><topic>SEPARATION</topic><topic>THEIR RELEVANT APPARATUS</topic><topic>TRANSPORTING</topic><toplevel>online_resources</toplevel><creatorcontrib>STREHLAU WOLFGANG DR</creatorcontrib><creatorcontrib>GOEBEL ULRICH</creatorcontrib><creatorcontrib>DOMESLE RAINER DR</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>STREHLAU WOLFGANG DR</au><au>GOEBEL ULRICH</au><au>DOMESLE RAINER DR</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>NITROGEN OXIDE STORAGE CATALYST, AND MANUFACTURE THEREOF AND ITS USE</title><date>2000-04-25</date><risdate>2000</risdate><abstract>PROBLEM TO BE SOLVED: To increase a load of a stored compound by a method wherein in a nitrogen oxide storage catalyst containing a fine catalytic material and a nitrogen oxide storage constituent, the nitrogen oxide storage constituent is so provided as to exist as fine barium sulfate and strontium sulfate after end of manufacturing the catalyst. SOLUTION: In a nitrogen oxide storage catalyst wherein a catalyst so structured as to provide a cover 2 on an inactive support 1 to be used for purifying an exhaust gas of a lean engine or the like, contains fine catalytic materials 3, 4 and a nitrogen oxide storing constituent 5, the nitrogen oxide storing constituent 5 is so formed as to exist as fine barium sulfate, and strontium sulfate, after end of manufacturing the catalyst, further a mixture or a mixed crystal of both sulfates, or as a decomposition product having at most 1 μm in average particle size. As the material 3, an activated aluminum oxide activated by use of platinum is used, and as the material 4, a constituent for storing oxygen or cerium/zirconium mixed oxide activated by use of rhodium is used.</abstract><edition>7</edition><oa>free_for_read</oa></addata></record> |
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| subjects | CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION THEIR RELEVANT APPARATUS TRANSPORTING |
| title | NITROGEN OXIDE STORAGE CATALYST, AND MANUFACTURE THEREOF AND ITS USE |
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