Chilli Oleoresin Extraction Plant
Chilli Oleoresin Extraction Plant
Mechotech designs and manufactures industrial solvent extraction plants for Chilli Oleoresin, derived from Capsicum annuum and Capsicum frutescens. The oleoresin contains capsaicin (1–10%), dihydrocapsaicin, and red carotenoid pigments including capsanthin and capsorubin, making it essential for food pungency standardisation, pharmaceutical topical analgesics, and natural food colouring. Our plants simultaneously extract both the pungency and colour fractions for maximum product value.
Mechotech's Chilli Oleoresin extraction plants use food-grade hexane or acetone in a multi-stage counter-current percolation process to extract capsaicinoids and carotenoid pigments from dried, ground chilli. Vacuum evaporation at below 60°C preserves labile carotenoids, while HPLC and spectrophotometric testing standardise both capsaicin content and colour value (ASTA units). All systems comply with WHO-GMP, FSSAI, and ATEX Zone 1 safety standards for flammable solvent handling.
Manufacturing Process
Raw Material Preparation
Dried chilli (Capsicum annuum or frutescens, moisture ≤10%) is de-stemmed, partially de-seeded to adjust pungency level, and ground to 20–40 mesh. The ratio of seed to pericarp in the feed blend is used to target the desired capsaicin-to-colour ratio in the final oleoresin.
Solvent Extraction
Ground chilli meal is extracted in SS percolators with food-grade hexane (for colour-rich oleoresin) or acetone (for full pungency and colour). Counter-current solvent circulation at 35–50°C dissolves capsaicinoids, carotenoids, fixed oils, and waxes into the miscella over 4–6 extraction stages.
Miscella Filtration
The deep red-orange miscella is filtered through a horizontal sparkler plate filter and a 2-micron polishing cartridge to remove all suspended chilli particles. Filtration efficiency is critical for clarity of the final product and is monitored by turbidity measurement.
Evaporation & Concentration
Filtered miscella is concentrated in a falling-film evaporator at 50–60°C under vacuum to remove bulk solvent. A wiped-film evaporator completes stripping to residual solvent below 25 ppm. Evaporated solvent is condensed and recycled at >95% efficiency per batch to minimise operating cost.
Standardization
Crude oleoresin is analysed by HPLC for total capsaicinoid content and by ASTA spectrophotometric method for colour value. Batches are blended to achieve target capsaicin level (e.g. 2%, 6%, 10%) and target ASTA colour units, then thinned with food-grade vegetable oil if required for pumpability.
Packing & Storage
Finished chilli oleoresin is filled into food-grade lacquer-lined tin cans or HDPE drums under nitrogen atmosphere to prevent carotenoid oxidation and colour degradation. Containers are stored in a cool, dark warehouse at 10–20°C. PPE requirements for capsaicin handling are enforced in the packing area.
Applications
- Food pungency standardisation in hot sauces, spice blends, processed meats, and snack seasonings for consistent Scoville heat units
- Pharmaceutical topical analgesic preparations (capsaicin cream, patches) for arthritis, neuropathic pain, and post-herpetic neuralgia treatment
- Natural food colouring using the capsanthin and capsorubin carotenoid fraction as a red-orange colour additive (approved EU E160c)
- Nutraceuticals and sports nutrition products leveraging capsaicin's thermogenic and metabolism-boosting properties
- Pepper spray and personal safety devices formulated from standardised capsaicin oleoresin concentrate
- Veterinary repellents and wildlife deterrent products using capsaicin's irritant properties
- Cosmetic and personal care formulations for pain-relief patches and warming topical creams
Key Features
Dual-Fraction Extraction
Mechotech's extraction process simultaneously recovers both the capsaicinoid (pungency) and carotenoid (colour) fractions in a single extraction run. Post-concentration fractionation allows customers to offtake either a balanced oleoresin or split the product into a high-colour and a high-pungency fraction.
Explosion-Proof Design
All equipment in the solvent zone is rated ATEX Zone 1 / IECEx. Hexane and acetone handling lines are fully enclosed with nitrogen padding. A distributed LEL detection network with audible alarm and auto-shutoff provides secondary safety protection.
Solvent Recovery System
Multi-stage falling-film and wiped-film evaporators combined with refrigerated condensers achieve over 95% solvent recovery per batch. Spent chilli marc is desolventised in a desolventiser-toaster to reduce residual hexane below 300 ppm before disposal.
GMP Compliant Construction
SS 316L product-contact surfaces, mirror-polished interiors, and full CIP capability meet WHO-GMP and FSSAI Schedule 3 requirements. The packing area includes dedicated positive-pressure clean rooms with HEPA filtration to prevent capsaicin contamination of the facility.
Multi-Spice Platform
The extraction plant is designed for rapid product changeover between chilli, paprika, red bell pepper, and other Capsicum varieties. Fully automated CIP cycles ensure complete removal of capsaicin residue between batches, preventing cross-product contamination.
Frequently Asked Questions
What is the typical capsaicin content achievable from the extraction plant?
Is there a risk of occupational exposure to capsaicin during processing?
Which solvent is best for chilli oleoresin — hexane or acetone?
Can the plant meet the residual solvent limits required for pharmaceutical capsaicin preparations?
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