Coriander Oleoresin Extraction Plant
Coriander Oleoresin Extraction Plant
Mechotech designs and manufactures industrial solvent extraction plants for Coriander Oleoresin, derived from Coriandrum sativum seeds. The oleoresin contains linalool (60–80%) as its principal aromatic constituent, along with camphor, geraniol, and fixed fatty acids, giving it a soft, sweet-floral character that distinguishes it from other spice oleoresins. Our plants are engineered for maximum linalool recovery through low-temperature extraction and gentle vacuum evaporation.
Mechotech's Coriander Oleoresin extraction plants use food-grade ethanol or hexane in a counter-current percolation extraction at 35–50°C to selectively dissolve the aromatic terpenoid and fixed oil fractions from ground coriander seeds. Falling-film vacuum evaporation below 55°C preserves heat-sensitive linalool, while GC-based standardisation ensures consistent aromatic quality for food and fragrance customers. All systems are ATEX Zone 1 certified and comply with WHO-GMP and FSSAI requirements.
Manufacturing Process
Raw Material Preparation
Dried coriander seeds (Coriandrum sativum, moisture ≤10%) are cleaned in a destoner and air classifier, then cracked or ground to 20–30 mesh in a hammer mill. Gentle cracking rather than fine grinding is preferred to expose the seed interior to solvent without over-generating fine meal that complicates filtration.
Solvent Extraction
Cracked coriander seed is loaded into SS 316L percolators and extracted with food-grade ethanol (95%) at 35–50°C. Ethanol dissolves linalool, camphor, geraniol, and the fixed oil (petroselinic acid-rich) into the miscella. A 3–4 stage counter-current flow maximises extraction yield over a 4–6 hour cycle.
Miscella Filtration
The pale-yellow aromatic miscella is filtered through a horizontal sparkler plate filter to remove seed particles, followed by polishing through 2-micron cartridge filters under nitrogen pressure. Turbidity is measured after each filtration stage to verify clarity before evaporation.
Evaporation & Concentration
Filtered miscella is fed to a falling-film evaporator operating at 45–55°C under vacuum (−0.08 MPa) to remove bulk ethanol. A final wiped-film evaporator strips residual ethanol to below 25 ppm while protecting the delicate linalool fraction from thermal degradation. Recovered ethanol is condensed and recycled at >95% efficiency.
Standardization
The concentrated oleoresin is tested by GC-FID for linalool content (target 60–80%), geraniol, camphor, and total volatile oil percentage. Fixed oil content is determined gravimetrically. Batches are blended to customer-specified linalool levels and may be diluted with food-grade MCT oil for viscosity adjustment.
Packing & Storage
Finished coriander oleoresin is filled into food-grade aluminium tins or amber HDPE drums under nitrogen blanketing to prevent linalool oxidation. Containers are stored at 10–15°C in a dark warehouse. Each container is labelled with batch number, GC profile, and COA reference for full traceability.
Applications
- Food flavouring in bakery, confectionery, meat processing, sausages, and spice blend formulations requiring authentic coriander flavour
- Fragrance industry as a natural source of linalool and geraniol for floral and oriental perfume bases and functional fragrance in detergents
- Nutraceuticals and herbal supplement formulations for digestive health, anxiolytic effects, and antioxidant benefit
- Liqueur and spirits flavouring, particularly in gin and bitter digestive liqueur formulations requiring coriander note
- Personal care and cosmetics — anti-inflammatory and skin-soothing applications in lotions, body washes, and hair care products
- Pharmaceutical flavour masking and excipient in oral liquid formulations where coriander imparts a clean, pleasant mouth feel
- Aromatherapy blends and home fragrance products — linalool's documented anxiolytic properties make coriander oleoresin popular in wellness applications
Key Features
Linalool Preservation
Extraction and evaporation temperatures are maintained below 55°C throughout the process to prevent linalool isomerisation and oxidation. The wiped-film evaporator stage minimises residence time at elevated temperature, ensuring the finished oleoresin retains its characteristic sweet-floral linalool profile.
Explosion-Proof Design
All motors, sensors, and switches in ethanol-handling zones are ATEX Zone 1 / IECEx certified. Continuous LEL monitoring, automatic emergency ventilation, and nitrogen padding of extraction vessels protect the facility during solvent-intensive extraction operations.
Solvent Recovery System
A falling-film evaporator–refrigerated condenser–molecular sieve recovery train achieves over 95% ethanol recovery per batch. Recovered ethanol is tested for purity and water content before returning to the extraction loop, maintaining consistent extraction performance over multiple batches.
GMP Compliant Construction
All product-contact surfaces are SS 316L with mirror-polish finish. CIP spray assemblies in all vessels, hygienic tri-clamp connections, and WHO-GMP-compliant plant layout support FSSAI licensing and pharmaceutical-excipient cGMP audits.
Multi-Spice Platform
The extraction system processes other umbelliferous seed spices — cumin, fennel, caraway, dill — with minimal changeover. The modular percolator design and CIP capability allow rapid product changeover within a single production shift.
Frequently Asked Questions
What oleoresin yield can be expected from coriander seeds?
How is linalool content verified in the finished oleoresin?
Can the plant process deoiled coriander seed meal after essential oil distillation?
Is coriander oleoresin accepted in organic-certified food products?
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