What is CNSL?
Cashew Nut Shell Liquid (CNSL) is a versatile by-product of the cashew industry. The nut has a shell of about 1/ 8 inch thickness inside which is a soft honey comb structure containing a dark reddish brown viscous liquid. It is called cashew nut shell liquid, which is the pericap fluid of the cashew nut.
How do you extract oil from cashew shells?
The processes used are mainly hot-oil and roasting in which the CNSL oozes out from the shell. The traditional method of extracting CNSL is by roasting of the nuts over an open fire. This removes the CNSL by charring / degradation thereby wasting the liquid which is a valuable source of natural phenols.
What are the uses of cashew oil?
This bean-shaped nut, found in tropical climatic regions is rich in magnesium and calcium. Its oil therefore helps in maintaining healthy and strong bones and teeth. 10. It helps prevent premature greying of hair by providing the hair and skin an important pigment known as melanin.
What is cashew nut shell?
Cashewnut shell liquid is a by-product of the cashew industry. The nut has a shell of about 1/8 inch thickness inside which is a soft honeycomb structure containing a dark reddish brown viscous liquid. It is called the cashewnut shell liquid, which is the pericarp fluid of the cashewnut.
Are cashews in a shell?
Its corrosive coating is the reason that cashew nuts are not sold in their shells like pistachios or peanuts. Instead, cashews are typically dried and roasted, a process that rids the nut of toxic oils and leaves its shell brittle and easy to remove.
Are cashew nut shells poisonous?
“Cashews themselves aren’t toxic, but they are surrounded by a shell that consists of the toxic oil urushiol… Coming into contact with urushiol can cause itching, blisters, and skin rashes.
Do cashews have oil?
The kernels contain 47% oil. The main market is as a high value edible nut. Cashew yields two “oils”. One of these, found between the seed coat (or pericarp) and the nut, is called cashew nut shell liquid (CNSL).
Is cashew good for skin?
Rich in magnesium, zinc, iron and phosphorous, Cashew nuts have loads of proteins and antioxidants including selenium which is good for your skin. Eating cashew nuts as wells as using cashew oil on your scalp helps the skin and hair to produce the pigment melanin. It gives a smooth texture to the hair.
Can we eat cashew with skin?
– Skin: I considered many people like to eat skin of cashew nut, I asked why did they like that, they said to me this skin was good smell, but I suggest you not to eat skin of cashew nut, because it contains acid and keratin, although it is eliminated but you will be thristy and dried throat.
How is CNSL used for cashew nut processing?
Cashew Nut Processing with CNSL Cashew Nut Shell Liquid (CNSL), Cashew Nut, Cashew Kernels, Cashew Nut Shell Oil
What kind of applications can CNSL be used for?
CNSL has innumerable applications, such as friction linings, paints, laminating resins, rubber compounding resins, cashew cements, polyurethane based polymers, surfactants, epoxy resins, foundry chemicals, and intermediates for chemical industry.
What is the potential of CNSL in India?
The production potential for the product is very high. The total production of raw cashew nut in the country could be as much as 2 lakh tonnes and at 10% recovery by weight, the production potential for CNSL is as much as 20,000 tonnes. There is a good scope for the export of CNSL to other countries which at present is on the decline.
How are CNSL resins used in the automotive industry?
CNSL resins have been used for many years in the manufacture of friction materials, contributing to the binding of the constituents as well as friction enhancers in the form of dust obtained from the cured resin. Samson Rwahwire, Bandu Madhukar Kale, in Green Composites for Automotive Applications, 2019