Cashew Nut Shell Oil Production. Manufacturing of Cashew Nut Shell Liquid or CNSL or Cashew Shell Oil or CNSL Oil
CASHEW NUT SHELL LIQUID or CNSL or Cashew Nut Oil or Cashew Shell Oil or CNSL Oil 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 or CNSL. Which is the pericarp fluid of the Cashew Nut. It is often considered as the better and cheaper material for unsaturated phenols.
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. It offers much scope and varied opportunities for the development of other tailor-made polymers.
Cashew Nut Shell Liquid undergoes all the conventional reactions of phenols, CNSL aldehyde condensation products and CNSL based phenolic resins are used in applications such as surface coatings, adhesives. Various polyamines synthesized from CNSL are used s curing agents for epoxy resins. CNSL and its derivatives have been used as antioxidants, plasticizers and processing aids for rubber compounds, modifiers for plastic materials and used to provide oxidative resistance sulphur-cured natural rubber products. It is also added to rubber gum stock or nit rile rubber to improve the processability, mechanical properties and resistance to crack and cut properties of the vulcanisates.
CNSL 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. It offers much scope and varied opportunities for the development of other tailor - made polymers.
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. Thus from 1 tonne of shells using oil bath process, upto 100 Kg of good quality of CNSL could be extracted by using oil expellers. It is advisable that a small unit of the size given below for extraction and recovery of CNSL is set up adjacent to each good cashew processing unit in view of the economic importance and ready foreign as well as internal demand of the product.
Cashew-Nut Shell Liquid Oil (CNSL) is an important by-product of cashew. India’s Cashew-Nut Shell Liquid Oil Export Market: Along with quality cashew kernel, Indian cashew nut industry is producing quality Cashew-Nut Shell Liquid oil which is also exportable. Indian cashew nut industry has big market for CNSL. CNSL oil is used in industries hence there is good demand from industrially developed countries. USA and China are the top most importers of Indian Cashew-Nut Shell Liquid oil.
Cashew nut shell liquid oil processing is one of the amazing and latest business ideas which has great market demand as it has many applications.
Cashew Oil or Cashew Nut Shell Oil is a dark reddish brown viscos liquid, extracted from soft honey comb structure inside the cashew shell.
CNSL has over 200 patents on its industrial applications.
The growth of this sector is expected to be high due increasing demand in the market, the CNSL oil market is expected grow with CARG of 7.8% by the year 2022.
Cashew nut shell liquid oil processing business has favorable market potential and great profitability.
KEY MARKETS AND EXPORT DESTINATIONS
· Export of cashew nut shell liquid/Cardanol from India stood at 6,908 MT, valued at Rs 26.28 crore (US$ 4.08 million) during April 2017-December 2017, while exports of cashew kernels stood at 67,653 MT, valued at Rs 4,715.21 crore (US$ 731.15 million) during the same period.
· Export earnings from raw cashew nut during April 2017- October 2017 stood at 3,775 MT worth US$ 6.96 million.
· India accounts for about 65 per cent of global cashew exports.
· India exports cashew kernels to over 60 countries. Its major markets are the US, the Netherlands, Japan, Spain, France, Germany, the UK as well as Middle East countries such as the UAE and Saudi Arabia.
Few Indian major players are as under:
· Golden Cashew Products Pvt. Ltd.
· Kerala State Cashew Devp. Corpn. Ltd.
· Padmavathi Cashews & Coffee Ltd.
· Pratap Cashew Co. Ltd.
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