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US 10,308,580 B2Granted
Process for preparing an arylpropene
AssigneeBASF SE
InventorsStefan Rüdenauer, Andreas Lanver, Ralf Pelzer, Klaus Ebel, Thomas Fenlon, Andrei-Nicolae Parvulescu, Sumana Chaturvedula
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Abstract
A process for preparing an arylpropene from a diarylpropane by gas phase thermolysis in the presence of solid porous catalyst comprising silica having large pore volume and low acidity.
Claims21
A process for preparing a compound of formula (I)
- comprising contacting a compound of formula (II)
- in the gas phase with a solid porous catalyst comprising silica, wherein
- k is, independently from each other, 0, 1, 2 or 3;
- R1 is, independently from each other, hydroxy, C1-C6 alkoxy, di(C1-C6-alkyl) aminyl;
- wherein the catalyst has a pore volume of at least 0.5 cm3/g as determined by Hg porosimetry according to DIN 66133, and an acidity characterized by an amount of adsorbed ammonia of at most 0.1 mmol/g(catalyst) as determined by NH3-TPD.
2 more elements
A process for increasing the selectivity of solid catalyst gas-phase thermolysis of a compound of formula (II)
- with respect to the compound of formula (I-a)
- wherein
- k is, independently from each other, 0, 1, 2 or 3;
- R1 is, independently from each other, hydroxy, C1-C6 alkoxy, di(C1-C6-alkyl) aminyl, which comprises utilizing a solid porous catalyst comprising silica, wherein the catalyst has a pore volume of at least 0.5 cm3/g as determined by Hg porosimetry according to DIN 66133, and an acidity characterized by an amount of adsorbed ammonia of at most 0.1 mmol/g(catalyst) as determined by NH3-TPD.
1 more element
Dependencies are inferred from the claim text.