It has surprisingly been found that this can be achieved by subjecting crude cashew nut shell liquid cnsl to a special chemical treatment and subsequent distillation. The main aim of the paper is to highlight the importance of the cashew industry in kenya and more specifically the need to exploit the main byproduct of cashew processing. Thermoreactive binder system of a phenol novolac leads to crosslinking into a threedimensional network during pad manufacturing. Cashew nut shell liquid an overview sciencedirect topics. The shell of the nut is approximately 18 inch thick. The cashew nut shell liquid cnsl can be considered as a versatile raw material with wide applications in the form of surface coatings, paints and varnishes, as well as the production of polymers. The components of cashew nut shell liquid have such similar physical characteristics that their separation into relatively pure components has been difficult and has prevented use of the oil in many technological areas. Crosssection of a cashew fruit knowledge ana inform a lion services. The average unsaturation of about two double bonds in the side chain of the cardanol molecules make cross linking easy and provides a satisfactory. The csnl content of the raw nut varies between 20 and 25 percent. Cashew nut shell liquid cnsl or cashew oil or cashew nut shell oil is a dark reddish brown viscous liquid, extracted from a soft honey comb structure inside the cashew shell. Cashew nutshell liquid cnsl or cashew shell oil cas registry number 8007247 is a natural resin with a yellowish sheen found in the honeycomb structure of the cashew nutshell, and is a byproduct of processing cashew nuts.
Cardanol manufacturing business, extraction process of cardanol, cardanol from. Manufacturing process of cashew nut shell liquid oil for the automobile industry. Cashew nut shell oil a renewable and reliable petrochemical. Cashew nut shell liquid cnsl is a versatile byproduct of the cashew industry. It is to manufacture both solid and semi solid resol or novolac. Balasaheb sawant konkan krishi vidyapeeth dapoli 415 712 maharashtra state india in the partial fulfillment of the requirements for the degree of doctor of philosophy agricultural engineering in agricultural process enginering by chaudhari ashok pralhad.
It is called cashew nut shell liquid, which is the pericap fluid of the cashew nut. They are highly durable in nature and offer tensile strength and excellent cement. The cashew processing industries generates huge quantity of shell, which is about 67% percentage of raw seeds. Import statistics data for cashew nut shell liquid. Market research, survey, manufacturing process, machinery, raw materials, feasibility study, investment opportunities, cost and revenue, plant economics, production schedule, working. Residol or residue or residuel obtained as a byproduct during the cnsl process after separating the monohydroxyl phenol. Nut processing, cashew nut processing project report pdf, cashew nut. Cashew nut shell liquid is a byproduct of the cashew industry. Thick product is highly reactive, homogeneous and natural.
The nut has a shell of about 18 inch thickness inside which is a soft honeycomb structure containing a dark reddish brown viscous liquid. It is called the cashew nut shell liquid, which is the per carp fluid of the. Cashew nut shell liquidbyproduct of cashew nut process. In a preferred embodiment the distillate may then be subjected to a further treatment with chemical adsorbents.
The basic cashew nut processing process is the following. Some manufacturers use the first method while some others. The extraction of natural cashew nutshell liquid from the. Cashew nut shell liquid is the pericarp fluid of the cashew nut. The nut has a shell of about 18 inch thickness inside which is a soft honey comb structure containing a dark reddish brown viscous liquid. Cashew nut shell liquid cnsl is a reddish brown viscous liquid, having the honey comb structure of the shell of cashew nut obtained from cashew tree. Subraya customizes and engineers the cashew nut shell liquid cnsl cardanol and residol as per customer requirements and distills to manufacture cardanol and residol. The nut has a shell about 18 inch thickness inside which is a soft honeycomb structure containing a dark reddish brown viscous liquid. The shell of the nut contains a dark reddish brown viscous liquid. This causes the cashews inside to become loose and easier to remove in time. Cashewnut shell liquid is a byproduct of the cashew industry. This allowed them to benefit from the sale of both processed nuts and the extracted cashew nut shell liquid. The cashew plant is of great economic significance to nigeria and other tropical countries due to its valuable.
A modified solvent process for the manufacture of cnsl. Cashew nut shell liquid, csnl manufacturer, cnsl resin, india. Pdf on sep 18, 2008, chibuzo ikwuagwu and others published design and construction of cashew. The outer reddish skin known as testa, is removed to obtain cashew nut after drying. We would not hesitate to give an unequivocal recommendation of you and your cashew nut shell liquid, friction dust and cardonol to anyone. Manufacturing process of cashew nut shell liquid oil for the automobile industry conference paper pdf available december 20 with 7,405 reads how we measure reads. The cashew kernels obtained are dried in a cabinet dryer. Our range of cashew nut shell liquid based mortars are very popular in the industry for the purpose of laying of floors, sealing and bedding of bricks, pipes and tanks. Cashew nut process plant, cashew nut process equipments. Then steam the inshell cashews under pressure to soften the shell.
Studies of extraction of cashew nut shell liquid a thesis submitted to the dr. The reaction of certain components with bases prior to distillation enables increased separation efficiency. Pdf manufacturing process of cashew nut shell liquid oil for. Cashew nut shell liquid or oil obtained by heat treatment contains about 10% cardol and about 90% cardanol a vessicant oil liquid resulting from decarboxylating anacordic acid and its polymers. Cashew nut shell liquid cnsl material safety data sheet section 1. The liquid thus treated is known as treated 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. Cashew nut shell liquid cnsl is a dark brown viscous liquid present inside a soft. These cashew nut shells can be used as a raw material for obtaining the most valuable cashew nut shell liquid cnsl and also the monomer, cardanol for the synthesis of novel polyurethanes. Formerly, a moister product of the cashew kernel industry in southern india, cashew nut shell oil has become a valuable raw material in the. Cardanol also known as cashew phenol is obtained in the distillation process of technical cnsl under reduced pressure.
Cashew nut shell liquid cas no 8007247 manufacturer. First of all, sundry the raw cashew and store them in gunny bags. Manufacturing process of cardanol is shown in table and flowchart. Pdf manufacturing process of cashew nut shell liquid oil. Abstractcashew nut shell liquid cnsl is a byproduct of the cashew industry. Profitable cashew nut processing industry cardanol is a natural phenol obtained from anacardic acid, the. This study evaluates the occurrence of cashew plant, extraction processes and composition of cashew nut shell liquid cnsl, modification and. 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 cashew nut shell is about 18 inch thickness, with a soft honeycomb structure inside, containing a dark reddish brown viscous liquid known as cashew nut shell liquid oil and is pericarp fluid. Processing of cashew nut shell and feasibility of its oil. Cashew nut processing with cnsl cashew nut shell liquid cnsl, cashew nut. Cashew nut shell liquid cnsl is an important industrial raw material for resin manufacture and the shells can be burned to provide heat for the decorticating operation. Pdf design and construction of cashew nut shell liquid extractor.
Cashew nut shell liquid manufacturers, cnsl suppliers. We are offering cashew nut shell liquid csnl also known as cashew phenol. Konda karakam vizianagaram andhra pradesh authorized supplier. The cashew nut processing industry is typically located in the rural and backward areas of india. The key steps of the process according to the invention are as. The processes used are mainly hotoil and roasting in which the cnsl oozes out from the shell. Therefore, a poweroperated cashew nut sheller was developed based on the principles of compression and shear.
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. The cnsl content of the raw nut varies between 20 and 25. Cashew nut processing with cnsl entrepreneur india. The cashew shell is used to extract cashew nut shell liquid cnsl, which is an important byproduct of cashew industry. Cashew nut shell liquid cnsl or cashew shell oil is a versatile byproduct of cashew nut processing. Cashew nut processing with cnsl, cashew nut shell liquid. Residol, a highly viscous dark substance is a partially polymerized cashew nut shell liquid cnsl obtained as a byproduct during the cashew nut shell liquid process. Measurement of the moisture content of cashew kernels. The main operations in the cashew nut processing are. Abstract cashew nut shell liquid cnsl is an useful product of cashew industries. In the twostage recovery of natural cashew nutshell liquid cnsl by solvent extraction, the overall yields from halfshells obtained by mechanical cutting and from chilled fragmented shells to solidify the phenols by manual processing are identical, indicating that no physical loss of phenolic material occurs in the mechanical process. It is called the cashewnut shell liquid, which is the pericarp fluid of the cashewnut. Cardanol production from cashew nut shell liquid cnsl.
Cashew nut shell liquid cnsl, and one of its ingredients, cardanol can be. The thickness of the cashew nut shell is about 18 in. Three different methods used in extracting cashew nut shell liquid from cashew nuts are mechanical, roasting and solvent extraction. The distillation takes place at high temperature and distilled cnsl vapours are received through high vacuum.
1531 1420 72 1286 948 301 1242 987 970 1622 252 753 1487 676 923 155 1422 771 842 1028 980 1366 1668 1005 548 617 1143 388 1311 1412 576 921 994 829 837 496 404 300 1161 1326 631 186