Petroleo Brasileiro S.a. - Petrobras

Edimilson Jesus De Oliveira

Rafael Menegassi De Almeida

Carlos Rene Klotz Rabello

Anderson Rouge Dos Santos

Marlito Gomes Junior

Mauro Iurk Rocha

The present invention relates to a method for the production of molecules with seven carbons constituted by a chain of four carbons with three methyl branches, primarily triptane (2,2,3-trimethylbutane), by alcohol coupling reaction (Guerbet reaction), resulting in an alcohol with a four-carbon chain with three methyl branches, which is transformed into triptane. The importance of this method stems from the fact that triptane is the hydrocarbon with the greatest capacity to resist compression without ignition and can be used in unleaded aviation gasolines and in the formulation of high-octane automotive gasolines.

Process for producing compounds, including triptane by an alcohol coupling reaction

The present invention refers to a process for producing a renewable isoparaffin compound with a high octane rating, comprising a step of Guerbet reaction between an initial C5 alcohol charge obtained from renewable raw material and methanol to produce a branched renewable C6 alcohol; dewatering of the branched renewable C6 alcohol into a C6 olefin; and hydrogenation of the C6 olefin into renewable isoparaffin. A renewable isoparaffin compound with a high octane rating, comprising at least 50% carbon of renewable natural origin in its composition, and use of said renewable paraffin in gasolines in general and in special high-performance gasolines, such as aviation gasoline, are also described.

Process for producing a renewable isoparaffin compound, renewable isoparaffin compound and use of the renewable isopraffin compound

An aviation gasoline (Avgas) formulation free from tetraethyl lead (TEL) for piston driven aircraft is described, the formulation comprising, in volume percent, between 0 and 65.2 base alkylate, between 0 and 50 super-alkylate, between 0 and 25 toluene, between 2 and 10 of a toluidine isomer blend, between 0 and 5 ethyl alcohol, between 0 and 25 Ccut and between 0 and 10 triptane. The formulations are prepared by admixing the components, with the order of mixing being from the denser to the less dense, except in the case of the toluidine isomer blend, which in spite of being the denser product is the latest to be added to the other streams in order to by-pass homogenization problems.

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Niterói, Brazil

Edimilson Jesus De Oliveira