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There are three primary types of plant oil, differing both the means of extracting the relevant parts of the plant, and in the nature of the resulting oil: Vegetable fats and oils were historically extracted by putting part of the plant under pressure, squeezing out the oil. Macerated oils consist of a base oil to which parts of plants are added.
A number of pressed vegetable oils are either not edible, or not used as an edible oil. The fruit of the amur cork tree Castor beans are the source of castor oil. Astrocaryum vulgare (Tucumã) oil. Amur cork tree fruit oil, pressed from the fruit of the Phellodendron amurense. It has been studied for insecticidal use. [184] [185]
Argan oil is a plant oil produced from the kernels of the argan tree (Argania spinosa L.), which is indigenous to Morocco and southwestern Algeria. [1] [2] In Morocco, argan oil is used to dip bread at breakfast or to drizzle on couscous or pasta. It is also used for cosmetic purposes. [3] [4]
Although sandalwood trees in India, Pakistan, and Nepal are government-owned and their harvest is controlled, many trees are illegally cut down. Sandalwood oil prices had risen to $3000 per liter by 2017. [12] S. ellipticum, S. freycinetianum, and S. paniculatum, the Hawaiian sandalwood (ʻiliahi), were also used and considered high quality.
Cedar oil, also known as cedarwood oil, is an essential oil derived from various types of conifers, most in the pine or cypress botanical families. It is produced from the foliage, and sometimes the wood, roots, and stumps left after logging of trees for timber.
Safrole is the principal component of brown camphor oil made from Ocotea pretiosa, [4] a plant growing in Brazil, and sassafras oil made from Sassafras albidum.. In the United States, commercially available culinary sassafras oil is usually devoid of safrole due to a rule passed by the U.S. FDA in 1960.
The world's largest palm oil biodiesel plant is the €550 million Finnish-operated Neste Oil biodiesel plant in Singapore, which opened in 2011 with a capacity of 800,000 tons per year and produces hydrodeoxygenated NEXBTL biodiesel from palm oil imported from Malaysia and Indonesia. [34] [35]
Palm kernel oil is an edible plant oil derived from the kernel of the oil palm tree Elaeis guineensis. [1] It is related to two other edible oils: palm oil , extracted from the fruit pulp of the oil palm, and coconut oil , extracted from the kernel of the coconut.