Figure 2. The petro (left) and bio routes (right) leading to the production and destruction of SLES

The classical petrochemical route used to synthesize conventional SLES, as shown in Figure 2, is based on naphta steam cracking, which dilutes a hydrocarbon feed (such as naphta or ethane) in gas or liquid forms with steam and heats the mixture in a furnace without the presence of oxygen.