Le procede DEMET III est utilise pour regenerer les catalyseurs de craquage catalytique desactives et contamines par des metaux. Il comprend trois etapes: une reaction de sulfuration qui transforme les metaux en sulfures, une oxydation des sulfures metalliques et un lavage destine a enlever les metaux. L'etude experimentale est realisee avec un catalyseur zeolitique constitue pour 54% de catalyseur Filtrol F-100, pour 41% de catalyseur Engelhard HFZ-20 et pour 5% de catalyseur Davidson CBZ-4
{"title":"Fluid catalytic cracking catalyst demetalation by converting metal poisons to washable sulfur containing compounds","authors":"J. Yoo, J. Karch, E. Burk","doi":"10.1021/I300024A008","DOIUrl":"https://doi.org/10.1021/I300024A008","url":null,"abstract":"Le procede DEMET III est utilise pour regenerer les catalyseurs de craquage catalytique desactives et contamines par des metaux. Il comprend trois etapes: une reaction de sulfuration qui transforme les metaux en sulfures, une oxydation des sulfures metalliques et un lavage destine a enlever les metaux. L'etude experimentale est realisee avec un catalyseur zeolitique constitue pour 54% de catalyseur Filtrol F-100, pour 41% de catalyseur Engelhard HFZ-20 et pour 5% de catalyseur Davidson CBZ-4","PeriodicalId":13540,"journal":{"name":"Industrial & Engineering Chemistry Product Research and Development","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1986-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84262429","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The microstructure and stereospecificity of a variety of 1.3-diene polymers prepared with lanthanide coordination catalysts were examined. In contrast to the conventional d-orbital transition-metal catalysts, the lanthanide catalysts would polymerize 1,3-diene monomers prevailingly in a 1,4-addition manner. The cis and trans 1,4-stereoregular polymerizations depend on the steric and electronic structures of the dienes. Under the same lanthanide catalysts the 1,4-dimethylbutadiene (e.g., trans, trans-2,4-hexadiene) leads exclusively to trans-1,4 polymers, the 2,3-dimethylbutadiene gives mainly cis-1,4 polymers, and the 1,3-dimethylbutadiene (e.g., trans-2-methyl-1,3-pentadiene) produces mixed trans/cis (60/40) 1,4-polymers. The ligands in the lanthanide catalyst and the polymerization conditions have relatively little effect on the stereoregulation.
{"title":"Mechanism of rare-earth catalysis in coordination polymerization","authors":"H. Hsieh, G. Yeh","doi":"10.1021/I300023A016","DOIUrl":"https://doi.org/10.1021/I300023A016","url":null,"abstract":"The microstructure and stereospecificity of a variety of 1.3-diene polymers prepared with lanthanide coordination catalysts were examined. In contrast to the conventional d-orbital transition-metal catalysts, the lanthanide catalysts would polymerize 1,3-diene monomers prevailingly in a 1,4-addition manner. The cis and trans 1,4-stereoregular polymerizations depend on the steric and electronic structures of the dienes. Under the same lanthanide catalysts the 1,4-dimethylbutadiene (e.g., trans, trans-2,4-hexadiene) leads exclusively to trans-1,4 polymers, the 2,3-dimethylbutadiene gives mainly cis-1,4 polymers, and the 1,3-dimethylbutadiene (e.g., trans-2-methyl-1,3-pentadiene) produces mixed trans/cis (60/40) 1,4-polymers. The ligands in the lanthanide catalyst and the polymerization conditions have relatively little effect on the stereoregulation.","PeriodicalId":13540,"journal":{"name":"Industrial & Engineering Chemistry Product Research and Development","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1986-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87653014","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
C. Satterfield, R. Hanlon, S. Tung, Z. M. Zou, G. Papaefthymiou
The addition of water vapor to dry synthesis gas to comprise as much as 27 mol % of the feed composition decreased catalyst activity, but the effect was completely reversible upon removal of the water vapor. Reversibility was not complete with water addition to comprise 42 mol % of feed. Water vapor decreased methane selectivity, increased oxygenate selectivity, and increased the rate of the water gas shift. However, these effects did not correlate with the relative Fe/sub 5/C/sub 2/, Fe/sub 3/O/sub 4/, and Fe content of the bulk catalyst as determined by Mossvauer spectroscopy, although the Fe/sub 5/C/sub 2/ content did not change greatly. Molecular weight distribution of the C/sub 3/-C/sub 7/ products was not affected by water.
{"title":"Effect of water on the iron-catalyzed Fischer-Tropsch synthesis","authors":"C. Satterfield, R. Hanlon, S. Tung, Z. M. Zou, G. Papaefthymiou","doi":"10.1021/I300023A007","DOIUrl":"https://doi.org/10.1021/I300023A007","url":null,"abstract":"The addition of water vapor to dry synthesis gas to comprise as much as 27 mol % of the feed composition decreased catalyst activity, but the effect was completely reversible upon removal of the water vapor. Reversibility was not complete with water addition to comprise 42 mol % of feed. Water vapor decreased methane selectivity, increased oxygenate selectivity, and increased the rate of the water gas shift. However, these effects did not correlate with the relative Fe/sub 5/C/sub 2/, Fe/sub 3/O/sub 4/, and Fe content of the bulk catalyst as determined by Mossvauer spectroscopy, although the Fe/sub 5/C/sub 2/ content did not change greatly. Molecular weight distribution of the C/sub 3/-C/sub 7/ products was not affected by water.","PeriodicalId":13540,"journal":{"name":"Industrial & Engineering Chemistry Product Research and Development","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1986-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76341756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Fluidized-bed flash pyrolysis of almond shells. Temperature influence and catalysts screening","authors":"R. Font, A. Marcilla, E. Verdú, J. Devesa","doi":"10.1021/I300023A022","DOIUrl":"https://doi.org/10.1021/I300023A022","url":null,"abstract":"","PeriodicalId":13540,"journal":{"name":"Industrial & Engineering Chemistry Product Research and Development","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1986-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80902088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Synthesis of statistical networks with liquid polybutadiene and telechelic bis(hydrogenosilyl) coupling agents","authors":"G. Friedmann, A. Nuryanto, J. Brossas","doi":"10.1021/I300023A003","DOIUrl":"https://doi.org/10.1021/I300023A003","url":null,"abstract":"","PeriodicalId":13540,"journal":{"name":"Industrial & Engineering Chemistry Product Research and Development","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1986-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89013242","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Etude de la correlation entre le nombre de cetane et la chaleur degagee par des reactions d'oxydation partielles de melanges carburants/air, mesuree a l'aide d'un analyseur d'octane. Cette etude est realisee pour des combustibles diesel dont le nombre de cetane varie entre 25 et 56
{"title":"Measurement of cetane number with a small-sample octane analyzer","authors":"Shing-Bong Chen","doi":"10.1021/I300023A004","DOIUrl":"https://doi.org/10.1021/I300023A004","url":null,"abstract":"Etude de la correlation entre le nombre de cetane et la chaleur degagee par des reactions d'oxydation partielles de melanges carburants/air, mesuree a l'aide d'un analyseur d'octane. Cette etude est realisee pour des combustibles diesel dont le nombre de cetane varie entre 25 et 56","PeriodicalId":13540,"journal":{"name":"Industrial & Engineering Chemistry Product Research and Development","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1986-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87137154","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Synthesis of telechelic oligoesters having low polydispersity using dicyclohexylcarbodiimide","authors":"F. Jones, D. Lu, J. Pechacek, S. Kangas","doi":"10.1021/I300023A002","DOIUrl":"https://doi.org/10.1021/I300023A002","url":null,"abstract":"","PeriodicalId":13540,"journal":{"name":"Industrial & Engineering Chemistry Product Research and Development","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1986-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85412469","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Functionalization reactions of poly(styryl)lithium with p-(dimethylamino)benzaldehyde","authors":"R. Quirk, Muhanad Alsamarraie","doi":"10.1021/I300023A001","DOIUrl":"https://doi.org/10.1021/I300023A001","url":null,"abstract":"","PeriodicalId":13540,"journal":{"name":"Industrial & Engineering Chemistry Product Research and Development","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1986-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82732384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
La reactivite de quelques chloroalcanes est aussi etudiee pour une comparaison afin de discuter du mecanisme de la reaction d'elimination
研究了一些氯烷烃的反应性，并进行了比较，讨论了消除反应的机理
{"title":"Catalytic dehydrochlorination of 3,4-dichloro-1-butene over cesium chloride supported on silica gel","authors":"I. Mochida, Tatsuro Miyazaki, H. Fujitsu","doi":"10.1021/I300023A023","DOIUrl":"https://doi.org/10.1021/I300023A023","url":null,"abstract":"La reactivite de quelques chloroalcanes est aussi etudiee pour une comparaison afin de discuter du mecanisme de la reaction d'elimination","PeriodicalId":13540,"journal":{"name":"Industrial & Engineering Chemistry Product Research and Development","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1986-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82092670","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The kinetics of NO reduction by CO have been investigated over a Pd/Al/sub 2/O/sub 3/ catalyst. These studies have been complemented by pulse reaction, transient response method, and TPD. The performance of the Pd catalyst depended strongly on the ratio of NO/CO and the reaction temperature. It was shown that the N/sub 2/O selectivity was minimum at the stoichiometric ratio of NO/CO. For NO conversion below 20% at 350/sup 0/C, the kinetics for NO reduction and N/sub 2/ and N/sub 2/O formation over Pd catalysts were first order in NO and inverse first order in CO. The kinetics and product selectivity were found to be in good agreement with a mechanism based on the chemisorption of NO as the rate-limiting step.
{"title":"Reduction of NO by CO over alumina-supported palladium catalyst","authors":"H. Muraki, H. Shinjoh, Y. Fujitani","doi":"10.1021/I300023A009","DOIUrl":"https://doi.org/10.1021/I300023A009","url":null,"abstract":"The kinetics of NO reduction by CO have been investigated over a Pd/Al/sub 2/O/sub 3/ catalyst. These studies have been complemented by pulse reaction, transient response method, and TPD. The performance of the Pd catalyst depended strongly on the ratio of NO/CO and the reaction temperature. It was shown that the N/sub 2/O selectivity was minimum at the stoichiometric ratio of NO/CO. For NO conversion below 20% at 350/sup 0/C, the kinetics for NO reduction and N/sub 2/ and N/sub 2/O formation over Pd catalysts were first order in NO and inverse first order in CO. The kinetics and product selectivity were found to be in good agreement with a mechanism based on the chemisorption of NO as the rate-limiting step.","PeriodicalId":13540,"journal":{"name":"Industrial & Engineering Chemistry Product Research and Development","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1986-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90156987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：