Soybean oil and beef tallow alcoholysis by acid heterogeneous catalysis

作者：Soldi Rafael A^*; Oliveira Angelo R S; Ramos Luiz P; Cesar Oliveira Maria Aparecida F

来源：Applied Catalysis A: General , 2009, 361(1-2): 42-48.

DOI：10.1016/j.apcata.2009.03.030

• Heterogeneous polymeric catalyst
• Sulfonated polystyrene
• Biodiesel
• Methanolysis

Sulfonated polystyrene compounds (SPS) were synthesized from linear polystyrene (PS), leading to catalytically active polymeric materials with sulfonation degrees between 5.0 and 6.2 mmol SO(3)H/g of dry polymer. Catalyst performance was evaluated in beef tallow and soybean oil transesterification with ethanol and methanol. The SPS Were used at 20 mol% Of -SO(3)H groups in relation to the oil mass. Methanol:oil molar ratios of 3:1, 6:1, 9:1, and 100:1 were employed, and the reactions lasted between 3 and 18 h. The SPS samples were insoluble in the reaction media and led to conversions of 85 and 75% of refined soybean oil and beef tallow with a 53 mg KOH/g acid number, respectively. There was an increase in ester production for reactions carried Out at higher methanol:oil molar ratio and, in some cases, products with as much as 94% methyl ester content were obtained. Therefore, sulfonated polymeric compounds obtained from linear polystyrene are efficient catalysts for the alcoholysis of refined vegetable oils and raw materials containing high acid numbers.

• 出版日期2009-6-20