Tin-Catalyzed Esterification and Transesterification Reactions: A Review

Table 4

Conversion and selectivity of the oleic acid esterification with ethyl alcohol catalyzed by SnCl₂·2H₂O or H₂SO₄^a [9].

Time (h)	SnCl2·2H2O		H2SO4
	Conversion	Selectivity	Conversion	Selectivity
	(%)	(%)	(%)	(%)
0	0	0	0	0
1	62	92	65	90
2	93	94	92	89
4	90	95	94	87
6	90	93	95	89
8	91	93	94	88

^aReactions conditions: ethyl alcohol (120.0 mmol), oleic acid (1.0), SnCl₂·2H₂O (0.40 mmol), H₂SO₄ (0.10 mmol), temperature (75°C), and oleic acid conversion was determined by GC analyses and titration against KOH (0.010 mol·L⁻¹).