What is the use of cashew nut shell oil?

C.N.S.L. has innumerable applications in polymer based industries such as friction linings, paints and varnishes, laminating resins, rubber compounding resins, cashew cements, polyurethane based polymers, surfactants, epoxy resins, foundry chemicals and intermediates for chemical industry.

What is cashew resin?

Cashew nutshell oil-derived bio-resins allow manufacturers to use a higher content of renewable material in a wide range of applications, without compromising performance. Novocard XFN resins are made from the phenol-rich oil extracted from discarded cashew nutshells.

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.

Are cashews shells poisonous?

It turns out that the cashew shell is toxic. Cashews instead have a lining around the seed that is filled with a nasty fluid. Cashews are in the same family (Anacardiaceae) as mangoes, pistachios, sumac, and poison-ivy. Many plants in this family produce Urushiol, an oil that can cause a nasty, painful rash.

What is cashew nut shell liquid?

Cashew nut shell liquid (CNSL) is a dark brown viscous liquid present inside a soft honeycomb structure of the cashew nutshell and is a very important agricultural byproduct of cashew nut and cashew apple production, produced by the cashew nut tree (Anacardium occidentale).

What happens to cashew nut shells?

When cashew nut shells are burnt to produce energy the phenolic oil in the shells produces acid fumes that are polluting and irritating.

How is cashew nut processed?

Generally the processing of raw cashew nuts into edible cashew kernel takes the following steps traditional method: roasting, shelling drying, peeling, grading, quality controls, fumigation and packaging. All these steps have to be conducted with care to obtain good quality and good grade kernels.

Can oil be extracted from cashew nuts?

The percentage oil extracted from the shell of the cashew was found to be 25.5% while that extracted from the kernel was 11.8% oil. The results of the physical analysis showed that the cashew kernel oil (CKO) is light yellow while the Cashew Nut Shell Liquid (CNSL) is dark brown.

Does cashew nut contain 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).

Why is the cashew the only nut you can’t buy in it’s shell?

In order to protect customers from skin allergies, cashew nuts are removed from their shells because the seed contain a harmful substance called urushiol and also the shells have a lining that is filled with this toxic fluid, so that is the reason why cashews are not sold in their shell.

How do you make cashew nut oil?

The method comprises: after 1) the cashew nut raw material of band shell being carried out boiling and drying successively, remove described shell, obtain the cashew nuts being with clothing; 2) by step 1) cashew nuts of resulting tape clothing carries out toasting successively, humidification and undressing, and …

What is CNSO (Cashew Nut Shell Oil)?

Cashew Nut Shell Oil (CNSO) is a versatile component of the Cashew fruits’ nut. The oil which is a dark reddish-brown in colour is resident in a soft honeycomb shell, that is the pericarp of the nut. It is a natural resin that could serve as a valuable raw material for multiple applications.

What are the chemical properties of cashew nut shell oil?

Cashew nut shell oil contains a mixture of Alkyl, natural Phenol with the main chemical composition: Cardanol, Cardol, 2-Methyl, and polymers. From the available chemical and chemical properties of cashew nutshell, it can be seen that this is a valuable raw material and auxiliary material in many industrial manufacturing industries.

What is the liquid inside a cashew nut?

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 cashew nut shell liquid, which is the pericarp fluid of the cashew nut.

What percentage of CNSL is present in raw cashew nuts?

Raw Cashew nut shell contains over 20% CNSL. In the oil bath process about 10% of oil is recovered as a by-product. By using expellers for extraction, it is possible to extract a further quantity of about 10% more from the shells.