Cohobation system
In the distillation method after the oil has been separated from water, the condensed water which called hydrosol [113] can be recycled and reused for another distillation process and never runs out. This process is called ”Cohobation” (figure 17 [114]). It is believed that this will controls the loss of water-soluble oxygen compounds in hydrosol. It is due to the reused water is saturated with dissolved constituents and further dissolution constituents are prevented. It is worth noting that the cohobation method is not recommended for high temperatures (above 100 °C), because in the case of continuous and direct contact of an oxygenated element with heat, the possibility of degradation and hydrolysis will have promoted [54, 55, 115]. This type of system is a kind of continuous system and reduces extraction time and costs.