Acid oil is produced by spling of vegetable oil soap stock with sulphuric acid or hydrochloric acid. Spling process can be performed either in batch or in connuous process, but considering the producon cost and quality of acid oil, connuous process is more economical then the batch process.
Typical Vegetable Oil Physical Re?ning process involves the Degumming of Crude Vegetable Oils such as Palm Oil to remove Gums and Phosphades by Hydraon with Phosphoric Acid, which is then seled out as Soap Stock. This reduces the Phosphades in the Oil to approx. 20ppm. This oil is then bleached with Acvated Earth in order to reduce the color in the Oil and, more importantly, to remove Peroxides, Residual Gums and Soaps which sll exist, despite the prior separaon process Industries such as the Crude Palm Oil Re?ning industry, large quanes of Spent Earth is generated and there exists a strong need to recover the Oil in the Spent Earth in an economical manner.