Cashew Nut Shell Liquid Extraction | CNSL | Cashew Nut Shell Oil

Cashew Nut Shell Liquid (CNSL) is a versatile by-product retrieved from the Cashew Processing Plant. Cashew Shells are the outer shell of the Cashew Nuts which are part of the Cashewnut Fruit along with Cashew Apples. This shell contains viscous liquid, which is released on steaming of raw cashew nuts. This Cashew Nut Liquid is used to produce phenols after undergoing a De-carboxilation process.

Cashew Nut Shell Liquid Extraction Plant

CNSL resins have been used for many years in the manufcature 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.

The shell of the nut is approximately 1/8th inch thick. Cashew nut shell liquid is the pericarp fluid of the cashew nut.

Natural CNSL is a mixture of phenolic compounds with aliphatic side chains and these are 70% anacardic acidm 5% cardonal and 18% cardol. CNSL is typically treated with high temperatures, which decarboxylates anacardic acid, yielding cardonal, additional distillation of CNSL rmeoves cardol leaving cardonal as the primary component in CNSL.

Different types of machines required in setting up a efficiently Cashew Nut Shell Liquid Extraction Plant (CNSL)

  • Shell Pressalso called as Expeller
  • Bucket Elevatorand Conveyor
  • Reaction Vessel
  • Wood Fired Steam Boiler
  • Screw Conveyor
  • Storage tanksfor liquid
  • Control Panel


This is mechical extraction process done using an Expeller, where cashew shells are fed via elevator to the expeller, which are crushed under force to release the liquid inside with strong force and de-oiled cashew cakes removed from other end.

This shell liquid is highly toxic and contains lot of impurities and also sulphur. It needs to be settled using inhibitors so the impurities are collected the bottom and using this refining technique liquid can be made ready for next process. 

Please contact our Engineering Team if you need to setup Cashew Nut Shell Liquid / Cashew Nut Shell Oil Plant or Project on a Turnkey Basis.

cashew nut shell liquid
cashew nut shell oil


Cashew Nut Shell Liquid – CNSL has a variety of industrial applications. It is used in coatings, additives, flame retardants, and pour point depressants. It has also been shown to inhibit the proliferation of HeLa cells and induced apoptosis. In addition, it has antibacterial, antifungal, and wound healing properties.

The Cashew Nut Shell Liquid (CNSL) is a phenolic liquid derived from the cashew nut. It contains mainly anacardic acid and cardol. The composition of CNSL differs according to the species of cashew. The differences may be due to climate, geography, or species.

Liquid from cashew nut shell in cashew nut industry has a range of applications and may be obtained from the pulverized shells. In some cases, the extraction of CNSL is carried out by solvent extraction. The quality of the extracted cashew nut shell oil varies according to the organic solvent. Nut shell oil may be purified using spontaneous emulsification. However, the extraction conditions should be mild to ensure that the natural composition of cashew nutshell liquid is preserved.

The cashew nut nut shell liquid (CNSL) is a non-edible, reddish brown phenolic liquid. It has a wide range of industrial and biomedical applications. It can be used as a renewable, economical, and environmentally friendly raw material. It can also be used to replace synthetic phenols. It is a non-toxic material that can be used in place of synthetic phenols. The presence of anacardic acid, an antibacterial agent, and methane-mitigating potency make it a promising raw material. It may also be used as an alternative to petroleum products.


Cashew Nut Shell Liquid – CNSL is a highly versatile by-product that is produced from Cashew Nuts. It is a reddish brown, viscous fluid that occurs in the soft honeycomb structure of the shell. It is used to produce phenols, which are used in a variety of chemical applications. It also provides an important source of long chain m-substituted phenolic compounds. It is widely used in polymer-based industries, as well as in surface active agents.

Natural cashew nut oil is a mixture of phenolic compounds with aliphatic side chains. The composition of natural Cashew Nut Shell Liquid – CNSL varies depending on the source and operating conditions. It is typically treated at high temperatures to decarboxylate anacardic acid. In addition, it contains approximately 18% cardol. CNSL is extracted from CNS using a cold, mechanical, or solvent extraction process.

In this study, we used a soxhlet extractor to isolate cardanol from CNSL. We evaluated the effects of process parameters, such as extraction cycle, solvent volume, pressure, and contact time on the extraction yield. The results showed that the effect of the extraction cycle on the yield was more significant than the effect of the solvent volume or pressure.

The process was carried out in an ASE extraction cell fitted with O-rings and end caps. A volume of 10 mL was extracted for each extraction cycle. The number of cycles per cell was set to achieve the desired Cashew Nut Shell Liquid – CNSL yield. The process was operated at 100 bars and used a water-methanol mixture as the solvent.


Various chemical reactions are performed using the cashew nut shell liquid (CNSL). This phenolic liquid is extracted from the outer shell of cashew nuts and has been a useful agricultural by-product. It has many industrial applications such as rubber compounding, polymerization reactions and coatings.

The cashew nut shell liquid is an important precursor to many polymers. It is also a source of antioxidant cardanol. It has been used in a variety of plastic formulations and is a useful additive for adhesives. Its properties make it a suitable replacement for phenol in many industrial applications.

The present invention relates to the reduction of dihydric phenols in cashew nut shell liquid. This is achieved by treating the liquid with a suitable solvent and a pressure profile. This method is capable of yielding up to 10 times more Cashew Nut Shell Liquid – CNSL than conventional supercritical fluid extraction.

The pressure profile method is a highly effective method of separating the cashew nut shell liquid from its residue. This is achieved by heating the material to a temperature of 170°C to 175°C. This is followed by a reduced pressure of 30 to 40 mm mercury.

The Cashew Nut Shell Oil CNSL is then distilled to produce cardanol. This is a highly effective precursor to many polymers, and is a vital precursor for oligomers. It is used in a variety of industrial applications, such as adhesives, coatings, polymerization reactions, and rubber compounding.

The cashew nut shell is an inexpensive and renewable organic material resource. The extraction process is a practical means of reducing dihydric phenols in the cashew nut shell liquid.

Cashew Nut Shell Liquid Market Size

Increasing demand for organic and bio-based products has a positive impact on the cashew nut shell liquid market. It is also expected to increase due to the increasing environmental awareness. In addition, the rise in demand from automobile and chemical industries is anticipated to drive the market growth.

Increasing usage of CNSL as paints is a major factor driving the growth of the market. CNSL-based paints are gaining popularity due to its waterproof properties and anti-microbial properties. In addition, a large number of automobile manufacturers are adopting CNSL-based friction dust in disc pad brakes.

Europe is expected to remain dominant in the market during the forecast period. The region has a strong automotive and energy sector. In addition, it is a well-established market with stringent regulations that support the growth of the industry. Moreover, Europe has a high level of environmental awareness. In addition, the European market is expected to witness significant growth due to the increasing initiatives to reduce carbon emissions.

Asia-Pacific is expected to grow at a faster rate. The region has an easy availability of raw materials and emerging industries. The increase in demand from the automotive and chemical industries is expected to drive the market growth in this region. Moreover, strict environmental regulations support the adoption of cashew nut shell liquid in the region. Oils extracted from Cashew Shells is gaining traction in African countries like Nigeria, Cote D-Ivoire and Ghana. 

Cashew nut shell liquid is a cheaper product and has a variety of applications in the polymer-based industries. CNSL is water-resistant and has properties similar to those of polyether polyols. Moreover, it is easier to use in curing applications.

Cashew nut shell liquid is a cheaper product and has a variety of applications in the polymer-based industries. CNSL is water-resistant and has properties similar to those of polyether polyols. Moreover, it is easier to use in curing applications.


CNSL, Cashew Nut Shell Liquid, is a by-product of the cashew nut processing industry. It is a viscous liquid with a dark brown color. It is used as an antioxidant, adsorbent, surface coating, epoxy, processing aid and as an ingredient in rubber compounds.

Several methods have been used for extraction of the liquid from a cashew shell. These methods include solvent extraction and mechanical extraction. Each method has its own distinct characteristics.

The solvent used in extraction was a mixture of methanol and water. The cashew nut shell was then conditioned at 20 degC for 72 hours. The liquid from the shell was then separated into cardanol and polyphenol. The liquid was then distilled.

We Supply Mechanical Expellers for extracting the oil from the cashew nut shells.


CNSL (Cashew Nut Shell Liquid) is a byproduct of cashew processing. It is a versatile raw material for various industrial applications. CNSL is a natural phenolic compound that can be transformed into specialty chemicals. These derivatives are used in paints, waterproofing, coatings, and many more applications. The chemical composition of CNSL is different depending on the organic solvent used to extract it. CNSL is an excellent alternative to synthetic phenols.

Whether or not you have heard of cashew oil, it is a nut oil produced from the cashew tree. The oil has been used in a number of different industries and it has a wide range of uses. In addition to being used for cooking, the oil is also used in skin care products, cosmetics and antifungal treatments.

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