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Castor oil is a vegetable oil pressed from castor beans, the seeds of the plant Ricinus communis. [1] The seeds are 40 to 60 percent oil. [2] It is a colourless or pale yellow liquid with a distinct taste and odor. Its boiling point is 313 °C (595 °F) and its density is 0.961 g/cm 3. [3]
Castor oil has numerous industrial uses, owing to the presence of a hydroxyl group on the fatty acid. Castor oil is a precursor to Nylon 11. Castor oil may also be reacted with epichlorohydrin to make a glycidyl ether which is used as a diluent and flexibilizer with epoxy resins. [citation needed]
Castor oil by itself has been used in making a variety of polyurethane products, ranging from coatings to foams, and the use of castor oil derivatives continues to be an area of active development. Castor oil derivatized with propylene oxide [9] makes polyurethane foam for mattresses and yet another new derivative is used in coatings [10]
Light sesame seed oil in a glass vial. Sesame oil is an edible vegetable oil derived from sesame seeds. The oil is one of the earliest-known crop-based oils. Worldwide mass modern production is limited due to the inefficient manual harvesting process required to extract the oil. Oil made from raw seeds, which may or may not be cold-pressed, is ...
The oil seeps through small openings that do not allow seed fiber solids to pass. Afterward, the seeds are formed into a hardened press cake , which is removed from the machine. Pressure involved in expeller pressing creates heat in the range of 140–210 °F (60–99 °C).
Cold-pressed juices could cost US$10 for a 16-ounce (473ml) bottle, and as high as US$12 for a 12-ounce (355ml) bottle. [ 2 ] [ 4 ] The high cost has been attributed to the manufacturing process, which uses an HPP machine that may cost from US$800,000 to over US$2 million. [ 5 ]