Patent ID: 7592470

Claim:
A process for producing at least one fatty acid ester and glycerin with a high degree of purity, comprising reacting a vegetable or animal oil with an aliphatic monoalcohol containing 1 to 18 carbon atoms in the presence of at least one catalyst comprising: mixtures of zirconium oxide and alumina having formula: (ZrO x ) y (Al 2 O 3 ) 1-y where x has the value 1.5 to 2.2 and y has a value of 0.005 to 0.995; or mixtures of antimony oxide and alumina having formula: (SbO x ) y (Al 2 O 3 ) 1-y where x has the value 1.6 to 2.2 and y has a value of 0.005 to 0.995.