“…A simple example of transesterification is given by the reaction of methanol with palmitin, which is the main constituent of palm oil, to give methyl palmitate, which can be used in place of diesel oil in internal combustion engines [equation (36)]. 37 Poly(ethylene terephthalate) (PET), which is used in fibres (Terylene, Dacron), or for packaging, or for blow-moulded bottles (Mylar, Melinex), can be produced by transesterification of dimethyl terephthalate with ethylene glycol [equation (37)]. 38,39 For recycling the polymer, poly(ethylene terephthalate) (ca 200-mer) can be transesterified with an excess of various diols 40 at 180-270 °C over several hours in the presence of…”