CATALYST, METHOD FOR ITS PREPARATION (VERSIONS) AND METHOD FOR BIOFUEL PREPARATION Russian patent published in 2009 - IPC B01J21/04 B01J23/02 B01J23/10 B01J37/03 C10G3/00 C07C67/03 

FIELD: chemistry.

SUBSTANCE: catalysts for preparation of biofuel by reesterification of vegetable oil with alcohol represent composition based on hexaaluminate (MAl₁₂O₁₉) having magnetoplumbite or β-Al₂O₃ whereat: M - Ba or Sr, or La, or having spinel structure (MR₂O₄) whereat: M - Ca or Sr, or Ba, whereat R contains Y or La, or composition based on MgO+R₂O₃+solid solution R_2-xMg_xO₃ with hexagonal structure whereat R contains Y or La, x=0.05÷0.12. The method for catalysts preparation includes precipitation of mixed solution of M and Al nitrates whereat M contains Ba or Sr, or La at constant values of pH 7.5-8.0 and temperature with water solution of NH₄HCO₃, or precipitation of mixed solution of M and R whereat M = Ca or Sr, or Ba, R contains Y or La at constant values pH equal to 9.9÷11.9 and temperature with water solution of KOH, or precipitation mixed solution of Mg and R nitrates at constant values of pH equal to 9.0-9.5 and temperature with water solution of KOH followed with stages of filtration, washing, drying and calcination. The method of biofuel preparation involves the reesterification of vegetable oil with alcohol implemented in the presence of the catalyst described above.

EFFECT: high level of the vegetable oil conversion.

13 cl, 1 tbl, 18 ex