TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preparation (Claimed): Preparation of the catalyst comprises: (a) co-precipitating by mixing the precursors of zinc II and aluminum III in the presence of a base, pH of 6.1-6.9 and at 30-50 degrees C; (b) filtering the obtained precipitate; (c) optionally washing to remove the residues; (d) drying at 80-175 degrees C optionally for 12-24 hours; and (e) calcinating in the presence of oxygen at 500-800 degrees C optionally for 1-4 hours. Preferred Components: The atomic ratio of zinc to aluminum is 0.56-0.58. At least a part of the zinc is located in the octahedral position of the spinel structure. The precursor of zinc II and aluminum III includes zinc and/or aluminum nitrate, zinc and/or aluminum sulfate, zinc and/or aluminum acetate, zinc and/or aluminum alkoxide or sodium aluminate. The base includes aqueous solution of sodium carbonate, aqueous solution of sodium hydrogen carbonate, ammoniacal solution, a soda solution and/or sodium aluminate solution. The catalyst is in the form of powder, extrudate, beads or pellets.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The aliphatic monoalcohol is methanol. The fat includes palm oil (coagulated or oleic), soy oil, palm kernel oil, coconut oil, babassu oil, old or new rapeseed oil, classic or oleic sunflower oil, corn oil, cotton oil, peanut oil, Jatropha oil, castor oil, linseed oil, crambe oil, seaweed oil, sunflower oil or rapeseed oil that is obtained by genetic modification or hybridization, oils partially modified by polymerization or oligomerization, cooking oils, knackery fat, fish oil, seal oil, poultry fat, tallow, lard or fats derived from processing wastewater. Preferred Process: The preparation of the composition is carried out at 130-220 degrees C, a pressure of below 10 MPa and with an excess of aliphatic monoalcohol relative to the stoichiometry of fat/alcohol. The preparation of the composition includes, after transesterification, evaporation of the aliphatic monoalcohol and separation of glycerin (preferably by decantation). The preparation of the composition is discontinuous or continuous using a fixed bed, autoclave and settlers in a series. The preparation of the composition is carried out in the fixed bed at 130-220 degrees C (preferably 150-180 degrees C), a pressure of 1-7 MPa and volume of catalyst per hour of 0.1-3 (preferably 0.3-2), where the weight ratio of alcohol/fat is 3/1-0.1/1. EXAMPLE - No suitable example given.