2001
DOI: 10.1016/s0926-860x(01)00494-x
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Production of camphene and limonene from pinene over acid di- and trioctahedral smectite clays

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Cited by 29 publications
(19 citation statements)
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“…Acid activated bentonites have been used as solid acid catalysts and catalyst supports for a number of organic applications that require an extreme degree of reaction control of considerable industrial interest (Mokaya and Jones, 1995, Breen et al, 1997, Volzone et al, 2001, Foletto et al, 2002, Didi et al, 2009. They have also been used in the foodstuffs industry, for sulphur production, forest and water conservation, in the chemical industry, for environmental protection, and in the paper industry (Clarke, 1985, O'Driscoll, 1988, as well as for bleaching of vegetable oils (Srasra et al, 1989, Christidis et al, 1997, Foletto et al, 2003, Kirali and Laçin, 2006.…”
Section: Introductionmentioning
confidence: 99%
“…Acid activated bentonites have been used as solid acid catalysts and catalyst supports for a number of organic applications that require an extreme degree of reaction control of considerable industrial interest (Mokaya and Jones, 1995, Breen et al, 1997, Volzone et al, 2001, Foletto et al, 2002, Didi et al, 2009. They have also been used in the foodstuffs industry, for sulphur production, forest and water conservation, in the chemical industry, for environmental protection, and in the paper industry (Clarke, 1985, O'Driscoll, 1988, as well as for bleaching of vegetable oils (Srasra et al, 1989, Christidis et al, 1997, Foletto et al, 2003, Kirali and Laçin, 2006.…”
Section: Introductionmentioning
confidence: 99%
“…Various acidic catalysts, such as oxides [2,3], oxides treated with acids [4], zeolites [5][6][7][8][9][10][11][12], mesoporous materials [12][13][14], activated clays [15][16][17][18][19], resins [20,21] and heteropolyacids [22], have been explored in isomerization of a-pinene. Currently, the acid-impregnated TiO 2 is used as an industrial catalyst for this purpose, but due to the low rate of the reaction, there is still a great interest in developing novel, viable contacts for the process.…”
Section: Introductionmentioning
confidence: 99%
“…Embora tenham sido utilizadas as mesmas condições experimentais (massa de catalisador e fluxo da mistura reacional de hidrogênio e b-pineno), foram obtidos somente produtos de reações de isomerização (até 90 ºC) tais como a-pineno, canfeno e limoneno 41 . A conversão para produtos de hidrogenação foi muito baixa, sendo detectada somente a partir de 100 ºC de temperatura reacional, atingindo 3% de cis-pinano a 120 o C, com conversão total de 13% do reagente.…”
Section: Nanopartículas Dispersas Em Sílica Amorfaunclassified
“…Conforme indicado na Tabela 2, são observados elevados teores do produto de reação de isomerização (a-pineno). Este comportamento pode ser atribuído a possíveis sítios ácidos no material, uma vez que é conhecido o fato de que a reação de isomerização de alcenos pode ser promovida por sítios ácidos fracos 41 . No entanto, deve-se considerar também a contribuição de possíveis problemas difusionais do reagente até os sítios metálicos, devido à estreita faixa de distribuição de poros apresentada por esta amostra.…”
Section: Nanopartículas Dispersas Em Sílica Amorfaunclassified