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Lorenzo Tagliabue

Mario Marchionna

Marco Di Girolamo

Franco Buonomo

Gianni Donati

Emilio Micheli

Mario Di Girolamo

A process is described for the production of hydrocarbons with a high octane number starting from hydrocarbon cuts containing isobutene by means of selective dimerization with acid catalysts, characterized in that the dimerization reaction is carried out in a tubular reactor using a feeding containing isobutene in quantities of less than 20% by weight and with a molar ratio linear olefins/isobutene greater than 3, preferably operating at a reaction temperature ranging from 30 to 120&deg; C., at a pressure of less than 5 MPa and at feeding space velocities of less than 60 h .

Process for the production of hydrocarbons with a high octane number by means of the selective dimerization of isobutene with acid catalysts

A process is described for the production of hydrocarbons with a high octane number starting from hydrocarbon cuts containing isobutene by selective dimerization with acid catalysts, characterized in that the dimerization reaction is carried out in the presence of tertiary alcohols, alkyl ethers and primary alcohols in such a quantity as to have, in the feeding, a molar ratio tertiary alcohols&plus;alkyl ethers&plus;primary alcohols/isobutene higher than 0.1, a molar ratio tertiary alcohols/isobutene lower than 0.2 and a molar ratio primary alcohols/isobutene lower than 0.2, preferably operating at a reaction temperature ranging from 30 to 120&deg; C., at a pressure lower than 5 MPa and feeding space velocities of less than 30 h .

Process for the production of hydrocarbons with a high octane number by the selective dimerization of isobutene

Process for the production of styrene which comprises:

Process for the production of styrene

A process is described for the production of hydrocarbons with a high octane number starting from hydrocarbon cuts containing isobutene by selective dimerization with acid catalysts characterized in that the dimerization reaction is carried out in the presence of primary alcohols and alkyl others in such a quantity as to have in the feeding a molar ratio primary alcohols+alkyl ethers/isobutene of more than 0.1 and a molar ratio primary alcohols/isobutene of less than 0.2, operating, preferably, at a reaction temperature of between 30 and 120.degree. C., at a pressure of less than 5 MPa and feeding space velocities of less than 30 h.sup.-1.

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Milan, Italy

Lorenzo Tagliabue