Vegetable oil extraction

摘要

A method of extracting recovering oil from vegetable material in which oil bearing material is heated and subjected to sonication at least one frequency above 400 kHz, removing a first yield of oil by decanting and subjecting the retained material to centrifugal separation to separate out a second yield of oil. Preferably the raw vegetable material is passed through a screw press and the obtained material is heated and subjected to the ultrasonic treatment and then allowed to settle for a predetermined period before decanting the oil layer. Preferably two frequencies above 400 kHz are used, one below 1 MHz and the second from 1 MHz. There are many potential transducers arrangements possible for producing standing waves.

主权项

1. A method of extracting oil from a premacerated oil-bearing material, the method comprises the steps of:
a) subjecting the premacerated oil-bearing material to at least one sonication step, wherein at least one plate transducer emitting a frequency of at least 400 kHz is employed to create a standing wave in the premacerated material; b) separating the premacerated material into components to form a first oil phase and a retained material phase; c) removing the first oil phase; d) optionally subjecting the retained material phase to at least a second sonication step and removing a second oil phase.