Sure, I’d be happy to explain more about these processes.
Dewaxing is a crucial step in the refining process, especially for oils that contain a significant amount of wax. The main purpose of dewaxing is to remove hydrocarbons that solidify readily (i.e., wax) for making lubricating oil base stock with low pour points. There are two commercial methods of dewaxing:
Solvent dewaxing: This is a physical process where separation of wax is achieved by freezing and solvent transport.
Catalytic dewaxing: This is a chemical process where removal of wax is done by selective reaction of long chain n-alkanes (wax).
Degumming is the first process in the vegetable oil refining which commences with the heating of crude oil. The main purpose of degumming is to remove the Phospholipids / Gums from the crude vegetable oils. There are generally two different types of phospholipids present in the crude oil depending upon their hydration levels:
Hydratable or Water Degumming: In this method, the crude oil is hydrated by mixing a calculated amount of water. Since hydrated gums are insoluble in oil, they get precipitated and are then separated from oil.
Non-Hydratable or Acid Degumming: For removal of Non-hydratable gums, water degumming is not suitable and the oil is conditioned by acid media such as phosphoric acid.
These processes are essential for improving the quality and commercial value of the crude oil.