The cashew nut is the source of cashew oil, which is edible cooking oil. The shells are extracted from these tropical nuts, and then they are dried as a final production. After the shells have been removed, the nuts are pressed to extract the oil from within them. Cashew oil is sort of cooking oil that is regarded as being of extremely high quality, and it is frequently seen as being healthier than other forms of cooking oil. It is also possible to extract oil from cashew nutshells, although this method is extremely hazardous. The Cashew Nut Shell Oil, often known as CNSO, is a multipurpose component of the nut of cashew fruits. The pericarp of the nut, which has the consistency of honeycomb, is home to the oil, which has a hue that can be described as dark reddish brown. 
It is a natural resin that has the potential to be used in a variety of different applications as a valuable raw material. As a result of rapid population increase and rising living standards, the world's petroleum resources have been overstretched and cannot meet the demand for petrochemical feedstock. This, in conjunction with a number of other causes, has led to the rapid depletion of the world's petroleum reserves. Therefore, there is a need to identify alternate sources of fuel and petrochemical feedstock in order to preserve the level of living and continuity of the industrial sector, both of which are essential to the continued existence of the human race during this decade and beyond. The cashew nut shell is a by-product of the cashew industry and serves as a raw material for the petrochemical industry. This by-product of the cashew business is an example of a valuable chemical. 
Cashew nut shell oil uses
The shells of cashew nuts are examples of biomass waste that have the potential to be used into various forms of usable energy and potent form of bio-oil. They may either be put through any thermochemical conversion process to produce energy directly, or they can be utilized to produce a bio-crude, also known as cashew nut shell liquid and a solid cake. Either way, there are two possible outcomes. The liquid that is extracted from cashew nut shells is a valuable and potent form of bio-oil, and its calorific content is equivalent to that of petroleum oils. This cashew nut shell oil is also recognized as an essential chemical precursor. It may be extracted from the shells of cashew nuts in a variety of processes, each of which results in a distinct quality of oil as well as cake. 
The cake that is produced as a consequence of this process has a lower amount of energy than the raw shells, but it is still usable as a solid fuel for the creation of energy. In prior research, the raw shells of cashew nuts were investigated as potential sources of energy. In contrast, the emphasis of the current investigation is on the cashew nut shell cake that is left over after the cashew nut shell oil has been physically extracted. This material will be compared in the study with raw cashew nut shells in terms of the volatiles and char yields as well as the pyrolysis kinetics. The primary goal is to create information that can be utilized for the effective use of cashew nut shells for the generation of energy or chemicals. This information may be used in a variety of ways. 
Cashew nut shell oil health benefits
Studies repeatedly demonstrate that include nuts in form of shell, oil, kernels in healthy diets reduces cholesterol and has positive benefits and effects on oxidative stress, inflammation, and vascular reactivity. Cashews and peanuts can raise HDL's carrying capacity while lowering LDL. The HDL is in charge of removing cholesterol from the heart and transporting it to the liver for oxidation. Heart health benefits: The Food and Drug Administration said in 2003 that a low-fat diet with a handful of nuts per day may lower the risk of heart disease. The Heart Association advises against consuming more than four servings per week of whole grains since they are high in calories. There are respiratory illnesses. According to this study, the unsaturated fatty acids, protein, fiber, vitamins, minerals, and antioxidants included in these nuts may have anti-inflammatory, anti-cancer, and cardio-protective characteristics. Consuming cashews has the ability to lower cholesterol, and they have several benefits for oxidative stress. 
Keep blood illnesses at bay: Copper, which has a significant impact on the body's ability to eliminate free radicals, is abundant in cashew nuts. Iron insufficiency, including anemia, can result from copper deficiency. Cashew nuts are an excellent source of copper and should thus be included in the diet in the prescribed amounts. Cashew nut eating in moderation can help avoid anemia. Protective lenses: Many different illnesses frequently affect our eyes. Zea Xanthine, a potent antioxidant pigment, is found in cashew oil. Our retina quickly and immediately absorbs this pigment. Our retina is then covered in a shield that prevents damaging UV radiation. Small doses of Zea Xanthine support eye health by preventing age-related macular degeneration in the elderly. 
Cashew nut shell liquid Wikipedia
Wikipedia mentioned: Cardanol is a phenolic lipid obtained from anacardic acid, the main component of cashew nutshell liquid (CNSL), a byproduct of cashew nut processing. In the chemical industry, cardanol is used in resins, coatings, frictional materials, and surfactants that are utilized as pigment dispersants for water-based inks. Other applications include frictional materials. It is employed in the production of phenalkamines, which are then put to use as curing agents in the long-lasting epoxy coatings that are applied to concrete floors. The name of the substance is a contraction of the genus Anacardium, which contains the cashew tree known as Anacardium occidentale. The cashew tree is also known as anacardium. The term "heart" in Greek is the source of the name of the genus that contains these organisms. 
Polymerizing the unsaturated side chain of cardanol is the first step in the production of friction particles. This is followed by cross-polymerization with formaldehyde, which results in the production of a cardanol-formaldehyde resin through a process that is comparable to the formation of phenol-formaldehyde resins like Bakelite. Mortimer T. Harvey, who was a student at Columbia University at the time, was the one who came up with the idea for cardanol-phenol resins in the 1920s. After it was discovered that the coefficient of friction of these resins was less susceptible to variations in temperature than that of phenol-formaldehyde resins, their usage began to spread in the braking systems of motor vehicles. In spite of all of these applications, only a small portion of the cardanol that is created from the processing of cashew nuts is employed in the industrial sector. As a result, there is continuing interest in the development of novel uses, such as new polymers. 
Cashew nut shell oil biodiesel
The shells of cashew nuts have the potential to be used as a feedstock in the manufacture of biodiesel. Cashew nut shell oil is the name given to the oil that is taken from the shell coat as well as the nut (CNSO). In order to lower the amount of moisture contained inside them, the cashew nut shells are dried. After that, they go through a milling process to increase the oil content. The cashew nutshell has a gentle honeycomb structure and measures around 0.3 centimeters in thickness. The shell of a cashew nut is made up of three layers, which are known as the endocarp, the epicarp, and the mesocarp. The mesocarp is made up of a natural resin that is responsible for storing the shell oil. A dark reddish brown and viscous liquid known as cashew nut shell liquid oil can be found inside cashew nut shells. The cashew nut shell oil has a ten percent concentration of cardol and a ninety percent concentration of anacardic acid (Mohod et al. 2011). It was determined that there was a need for 10,000 tons of cashew nut shell oil. It is anticipated that the rate of growth in demand would be between 7 and 8 percent every year (Mohod et al. 2008). The table below provides an overview of the biodiesel's fatty acid profile. 
Cashew nut shell liquid toxicity
The production of cashews results in the creation of a by-product known as cashew nut shell liquid. In this discussion, we will mention its toxicity. The nut has a hard honeycomb structure on the interior that is surrounded by a dark reddish brown viscous liquid. The shell of the nut is around 1/8 of an inch in thickness. It is referred to as the cashew nut shell liquid, and it is the fluid that is found in the pericarp of the cashew nut. Termites are the most destructive pests when it comes to wood. Wood preservatives such as arsenic compounds, boric acid, and chlorinated chemicals represent a risk to the surrounding environment and should be avoided. The toxicity of termiticides derived from natural sources, such as cashew nut shell liquid (CNSL), is lower. It is a thick liquid that has a reddish-brown color and may be found in the pericarp of cashew nuts (Anacardium occidentale). The cashew nut shell liquid, often known as CNSL, might have significantly diverse qualities depending on the manufacturing procedure that it was subjected to. Treatment is necessary for CNSL that was generated by the cold press solvent extraction technique since it contains residues of sulphur compounds and metallic contaminants that need to be removed. The features of this processed CNSL are distinct from those of the raw CNSL, the source material from which it was derived. The Indian Standard Specifications for CNSL are included in the table that follows. 
Cashew nut shell oil price
The shell oil, which is recovered from the cashew nut's outer shell, has industrial applications in the automotive industry, leather manufacturing, and tobacco curing. More recently, it has also found use in the energy business. As a replacement for phenol, CNSL-derivatives have been utilized. CNSL is also utilized in the production of paint resins, foundry core oils, insulating varnishes, and similar products. In recent years, the shell liquid has been extensively distilled to generate Cardanol, which is employed in the creation of friction dust for brake linings and rubber compounding formulas. There have recently been requests for CNSL as an energy input. CNSL has characteristics similar to furnace oil. The potential as a fuel increases its worth. 
"It can compete with more expensive petroleum products as a biofuel. This achievement bodes well for the cashew value chain and will ultimately aid the expansion of large-scale agriculture in non-traditional areas of India. "At the same time, traditional users will have to adjust to the new pricing structure," added Prabhu. Although the country processes more than one million tonnes of raw cashew nuts annually, its shell liquid output is restricted since not all processing facilities generate it. Currently, the country produces 60,000 tonnes of CNSL, compared to a maximum of 160,000 tonnes (about 15 per cent of the nut weight is liquid). Karnataka generates a third of the overall output, or 20,000 tonnes per year, while Kerala, Tamil Nadu, Goa, Andhra Pradesh, and Orissa make up the remainder. Brazil is the world's biggest producer of CNSL, meeting the United States' total need. Vietnam, which in recent years began processing cashews, has also begun generating this liquid.