Nitrates of ethers of glycerol and ethanol as diesel cetane improvers and the production process of the same
AssigneePetroleo Brasileiro S.A. - Petrobras
InventorsBernardo Galvão Siqueira, Cristiana Neves Porto, Raphael Bezerra De Menezes, Marlito Gomes Junior, Carlos Rene Klotz Rabelo
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Abstract
The present invention is related to the use of nitrates of ethers of glycerol and ethanol as diesel cetane improvers, and the production process of the same, aiming at producing an additive from glycerol from biodiesel production and bringing to the additive market an option more economical and efficient to facilitate the ignition of diesel and improve the cetane number of said fuel.
Claims10
A PROCESS FOR OBTAINING NITRATES OF ETHERS OF GLYCEROL AND ETHANOL AS DIESEL CETANE IMPROVERS, comprising the following steps:
- a) etherification reaction between glycerol and alcohols, wherein the alcohols comprises ethanol, and wherein the etherification reaction is catalyzed by an acidic catalyst chosen from:
- ion exchange resins, zeolites, aluminas, niobic acid or another acidic catalyst, and wherein the etherification reaction occurs with a glycerol/ethanol molar ratio ranging between 1:1 and 1:6, temperature between 5° and 250° C. and a space velocity (LHSV) from 0.25 to 4.00 h−1;
- b) separating the compounds obtained in step (a);
- and
- c) nitration of glycerol and ethanol mono-ethers, with the substitution of the two available hydroxyls, forming dinitrated ethers, using glycerin from a biodiesel production process.
Dependencies are inferred from the claim text.