Industry Overview
Cashew nut shell liquid (CNSL) is a renewable by-product of the cashew processing industry and a versatile industrial raw material containing predominantly cardanol, along with cardol and other phenolic constituents. Cardanol can be obtained from CNSL through suitable processing and has applications in resins, coatings, varnishes, friction materials, laminating resins, adhesives, insulating materials, industrial flooring and other specialty products.
The industrial significance of CNSL is largely based on its ability to undergo polymerization and condensation reactions with aldehydes, producing materials with useful resistance to acids, alkalis, solvents, abrasion and elevated temperatures. Hydrogenation and other chemical transformations of cardanol also enable the preparation of specialized derivatives and advanced materials, including cardanol-based precursors.
Cashew cultivation and processing have a long history in India, following the introduction of the crop by the Portuguese several centuries ago. Cashew processing generates shell liquid as an important by-product, and recovery of this oil through oil-bath processing, solvent extraction or expeller methods provides an additional industrial resource. The report covers CNSL composition, properties, specifications, market applications, cardanol manufacturing processes, equipment, utilities, effluent treatment, plant layout, project economics and suppliers.
Cost Estimation
| Cost Parameter | Value |
|---|---|
| Plant Capacity | 7 MT/Day |
| Land & Building (3000 sq.mt.) | Rs. 86 Lac |
| Plant & Machinery | Rs. 90 Lac |
| Working Capital for 2 Months | Rs. 1.55 Cr |
| Total Capital Investment | Rs. 3.46 Cr |
| Rate of Return | 44% |
| Break Even Point | 44% |
Content Index
- INTRODUCTION
- HISTORICAL BACKGROUND
- CASHEWNUT SHELL LIQUID
- CASHEW TESTA
- CASHEW KERNEL
- CASHEW NUT SHELL LIQUID - A VERSATILE INDUSTRIALRAW MATERIAL
- COMPOSITION OF CNSL
- CARDANOL RESINS FIND USE IN THE FOLLOWING TRADES:-
- RAW MATERIAL SECTION
- PROPERTIES
- PROPERTIES OF CNSL
- PENALTIES
- TOTAL VOLATILE LOSS
- VISCOSITY
- TEST TUBE GELS
- USES & APPLICATION
- B.I.S. SPECIFICATION
- MARKET SURVEY
- INDIAN DEMAND
- KEY MARKETS AND EXPORT DESTINATIONS
- POTENTIAL DATA ON CSNL /CARDANOL
- ESTIMATED DEMAND
- CASHEW NUT SHELL LIQUID
- COST EFFECTIVE MODERN MATERIALS
- ADVANTAGES OF CNSL BASED POLYMERS
- POLYMERISATION CHARACTERISTICS OF CNSL
- CNSL CAN BE POLYMERISED BY A VARIETY OF METHODS:
- INDUSTRIAL SIGNIFICANCE OF CNSL
- REACTIVITY
- CARDANOL
- ISI SPECIFICATION OF THE UNTREATED CNSL IS: 840(1964)
- POLYMERIZATION TIME
- SPECIFICATION FOR TREATED CASHEW NUT SHELL LIQUID
- THE SPECIFICATION OF TREATED CASHEWNUT SHELL LIQUID IS AS FOLLOWS:
- SPECIFICATION FOR COLD PRESSURE CASHEWNUT SHELL LIQUID
- MANUFACTURING PROCESS
- THE FOLLOWING STEPS ARE INVOLVES IN THE MANUFACTURING PROCESS OF CARDANOL.
- PROCESS FOR THE PRODUCTION OF CARDANOL
- THE CARDANOL/CARDOL MIXTURE OBTAINED IN THIS WAY HAS THREE TECHNICAL DISADVANTAGES:
- THE KEY STEPS OF THE PROCESS ACCORDING TO THE METHOD ARE AS FOLLOWS:
- PROCESS ACCORDING TO THE METHOD
- STEP 1:
- STEP 2:
- STEP 3:
- STEP 4:
- DETERMINATION OF COLOR STABILITY
- PROCESS 1
- SYNTHESIS OF ACETATE SUBSTITUTED CARDANOL
- PROCESS 2
- HYDROSILYLATION OF ACETATE SUBSTITUTED CARDANOL
- PROCESS 3
- PROCESS 4
- HYDROLYSIS OF ACETATE SUBSTITUTED CARDANOL DIMER TO PRODUCE A LOW VISCOSITY DIMER
- PROCESS 5
- SYNTHESIS OF HIGH SILICONE CONTENT (45%) CURING AGENTS FROM THE LOW
- OPTIMIZATION OF HEATING TIME AND TEMPERATURE FOR CNSL DECARBOXYLATION
- OPTIMATION OF DISTILLATION TEMPERATURE FOR CARDANOLISOLATION
- RENDEMENTS OF THE DISTILLATE
- CHARACTERISTICS OF DISTILLATE
- PROCESS FLOWSHEET FOR THE MANUFACTURE OF CARDANOLRESIN
- MANUFACTURERS/SUPPLIERS/EXPORTERS OF CARDANOL RESIN
- PRODUCTS RELATED TO CARDANOL RESIN
- RAW MATERIAL SUPPLIERS
- CASHEW NUT SHELL LIQUID
- PLANT & MACHINERIES SUPPLIERS ADDRESS
- VACUUM DISTILLATION PLANT
- BOILER
- STORAGE TANK
- AUTOMATIC CAN FILLING & SEALING MACHINERIES
- WEIGHING MACHINES
- PACKAGING MACHINE
- D.G. SET
- LABORATORY TESTING EQUIPMENTS
- PRINCIPLES OF PLANT LAYOUT
- PLANT LOCATION FACTORS
- 1. RAW-MATERIAL SUPPLY:
- 2. MARKETS:
- 3. POWER AND FUEL SUPPLY:
- 4. WATER SUPPLY:
- 5. CLIMATE:
- 6. TRANSPORTATION:
- 7. WASTE DISPOSAL:
- 8. LABOR:
- 9. REGULATORY LAWS:
- 10. TAXES:
- 11. SITE CHARACTERISTICS:
- 12. COMMUNITY FACTORS:
- 13. VULNERABILITY TO WARTIME ATTACK:
- 14. FLOOD AND FIRE CONTROL:
- EXPLANATION OF TERMS USED IN THE PROJECT REPORT
- 1. DEPRECIATION:
- 2. FIXED ASSETS:
- 3. WORKING CAPITAL:
- 4. BREAK-EVEN POINT:
- 5. OTHER FIXED EXPENSES:
- 6. MARGIN MONEY:
- 7. TERM LOANS:
- 8. TOTAL LOAD:
- 9. LAND AREA/MAN POWER RATIO:
- UTILITIES
- POWER
- WORKING
- TOTAL MANPOWER AND PAYROLL
- UTILITIES
- WATER
- WATER QUALITY PARAMETERS FOR PROCESSED WATER:
- STEAM
- POWER
- EFFLUENT TREATMENT AND DISPOSAL
- THE WASTE FROM THE FOOD PROCESSING OPERATIONS MAY BE CLASSIFIED ON THE BASIS OF:
- STANDARDS
- TOLERANCE LIMITS FOR INDUSTRIAL EFFLUENT DISCHARGE
- WASTE TREATMENT
- PRIMARY TREATMENT
- ANAEROBIC TREATMENT
- ANAEROBIC TREATMENT HAS THE ADVANTAGES OF
- SECONDARY TREATMENT
- TERTIARY TREATMENT
- SOLIDS CONCENTRATION
- TYPICAL WASTE SOLIDS CHARACTERISTICS
- EQUIPMENT REQUIREMENT
- EQUIPMENT REQUIREMENTS
- LIST OF MAJOR FOREIGN INDUSTRIES CARDANOL
- MAJOR INDIAN INDUSTRIES
- QUALITY SPECIFICATION OF CARDANOL
- CARDANOL: OPPORTUNITIES FOR REPLACING PETRO-DERIVED PHENOLS
- MACHINERY PHOTOGRTAPH
- RAW & FINAL PRODUCTS PHOTOGRAPHS
- FINAL PRODUCTS PHOTOGRAPHS
- ORGANIZATION CHART
- PLANT LAYOUT
- TURNKEY CONSULTANT
- IMPLEMENTATION SCHEDULE
Appendix
- APPENDIX – A:
- 01. PLANT ECONOMICS
- 02. LAND & BUILDING
- 03. PLANT AND MACHINERY
- 04. OTHER FIXED ASSESTS
- 05. FIXED CAPITAL
- 06. RAW MATERIAL
- 07. SALARY AND WAGES
- 08. UTILITIES AND OVERHEADS
- 09. TOTAL WORKING CAPITAL
- 10. TOTAL CAPITAL INVESTMENT
- 11. COST OF PRODUCTION
- 12. TURN OVER/ANNUM
- 13. BREAK EVEN POINT
- 14. RESOURCES FOR FINANCE
- 15. INSTALMENT PAYABLE IN 5 YEARS
- 16. DEPRECIATION CHART FOR 5 YEARS
- 17. PROFIT ANALYSIS FOR 5 YEARS
- 18. PROJECTED BALANCE SHEET FOR (5 YEARS)
Frequently Asked Questions
CNSL is a valuable phenolic liquid obtained from cashew nut shells during cashew processing. It is a renewable industrial raw material containing cardanol and cardol along with other related constituents. CNSL can be processed into materials used in resins, coatings, varnishes, friction products, laminating materials and other specialty applications. Its chemical functionality also allows it to undergo polymerization, condensation, hydrogenation and other transformations, making CNSL and its derivatives useful alternatives or complementary materials for several conventional industrial chemicals.
Cardanol is produced from CNSL through controlled thermal treatment and separation processes, particularly decarboxylation followed by distillation. The process is designed to separate the desired phenolic component from other constituents while controlling temperature and operating conditions. The report discusses optimization of CNSL decarboxylation and distillation temperature, distillate yields and characteristics, together with process steps for producing cardanol and related derivatives. Appropriate process design, quality control and equipment selection are important for achieving consistent product characteristics.
Cardanol and CNSL are used in a broad range of industrial applications, particularly in polymeric and surface-coating materials. Reported applications include brake linings, clutch and friction facings, insulating and waterproofing varnishes, coating and laminating resins, molding compositions, acid- and oil-resistant materials, industrial floor products and protective coatings. Their derivatives can also be used in specialty chemical formulations. The chemical structure of cardanol provides reactive functional groups that support further modification for producing materials with tailored performance characteristics.
CNSL is considered renewable because it is recovered as a by-product of the agricultural cashew processing industry rather than being derived primarily from fossil resources. Utilizing cashew shells for industrial chemicals creates additional value from an existing processing stream and reduces dependence on disposal of the shell material. CNSL can be converted into cardanol, resins and other derivatives with diverse industrial applications. This combination of agricultural origin, by-product utilization and chemical versatility contributes to its industrial relevance.
A cardanol manufacturing plant requires process, storage, utilities and quality-control equipment selected according to the process configuration and production requirements. The report identifies equipment such as a vacuum distillation plant, boiler, storage tanks, automatic can filling and sealing machinery, weighing machines, packaging machinery, D.G. set and laboratory testing equipment. Equipment selection should consider material compatibility, temperature and vacuum requirements, process control, product quality, safety, maintenance and the desired operating scale.
Plant location should be selected after evaluating raw-material availability, markets, power and fuel supply, water supply, climate, transportation, waste disposal, labor, regulatory requirements, taxes and site characteristics. Community factors, flood and fire control and other site risks should also be considered. For a CNSL or cardanol project, proximity to cashew processing areas can support reliable access to shell liquid or raw materials, while access to customers, utilities, transport infrastructure and appropriate industrial services can improve operational efficiency.
Waste and effluent management involves identifying process wastes, characterizing them and applying suitable treatment before disposal or reuse. The report covers standards, tolerance limits for industrial effluent discharge, primary treatment, anaerobic treatment, secondary treatment, tertiary treatment and solids concentration. The appropriate treatment train depends on the nature and loading of the wastewater and solid residues generated. Effective waste management should also incorporate segregation, recovery opportunities, safe handling, monitoring and compliance with applicable environmental requirements.
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