Jasmine Concrete & Absolute Extraction Plant
Jasmine Concrete & Absolute Extraction Plant
Mechotech manufactures industrial jasmine concrete and absolute extraction plants for Jasminum grandiflorum (Spanish jasmine) and Jasminum sambac (Arabian jasmine), using cold food-grade hexane maceration followed by ethanol washing. The process preserves the heat-sensitive aromatic signature — benzyl acetate (15–28%), linalool, benzyl benzoate, and phytol — that makes jasmine absolute one of the most commercially valuable floral extracts in perfumery. Systems are available from 50 kg to 3,000 kg fresh flower charge per batch.
Jasmine flowers undergo rapid enzymatic changes after picking and must enter extraction within 2–4 hours to preserve aromatic integrity. Mechotech's purpose-designed jasmine extraction plants include refrigerated flower-holding areas, fast-cycle extraction vessels for short maceration times, and vacuum evaporation systems operating below 40°C. The complete process yields jasmine concrete at 0.25–0.35% from fresh flowers and jasmine absolute at 50–60% of the concrete weight, with benzyl acetate content verified by GC-MS in our QC protocol. All plants are manufactured in SS 316L with ATEX-rated hazardous area electrical systems.
Manufacturing Process
Fresh Flower Collection & Quality Inspection
Jasminum grandiflorum or J. sambac flowers are harvested early morning when aromatic compound concentration peaks. Flowers are inspected for freshness, absence of wilt, and pest damage. Owing to the rapid post-harvest enzymatic degradation of benzyl acetate and linalool, flowers must reach the extraction plant within 2–4 hours of picking. Batches are weighed, sampled for moisture (typically 78–85%), and charged to extraction immediately.
Hexane Extraction (Cold Maceration)
Flowers are loaded into jacketed SS 316L extraction vessels and covered with food-grade n-hexane at a solvent-to-flower ratio of 4:1 to 5:1 (v/w). Maceration is conducted at 20–25°C (never above 30°C) with intermittent gentle agitation for 3–5 hours. Two to three extraction stages are used in sequence (fresh solvent on increasingly spent flowers) to maximise recovery of benzyl acetate, linalool, and benzyl benzoate while minimising co-extraction of chlorophyll and fatty acids.
Miscella Filtration
The aromatic hexane solution (miscella) is separated from spent flowers by gravity drainage followed by pressure filtration through leaf filters. Spent flowers are mechanically pressed to recover residual hexane. Filtrate is polished through cartridge filters to achieve clarity, removing particulate matter and chlorophylls to the extent possible before evaporation.
Vacuum Evaporation to Concrete
Miscella is concentrated in a falling-film vacuum evaporator at below 40°C and 40–70 mbar. Hexane vapour is condensed and recycled to the extraction tanks (>97% recovery). The concentrate is transferred to a vacuum agitated pan for final stripping, yielding jasmine concrete — a yellow-brown semi-solid containing 30–45% aromatic compounds including benzyl acetate, benzyl benzoate, phytol, and natural waxes including higher alkanes and fatty acids.
Alcohol Washing (Absolute Isolation)
Jasmine concrete is dissolved in 96% food-grade ethanol at 1:6 to 1:8 (concrete:ethanol w/v) with vigorous stirring at 20–25°C for 2–3 hours. The ethanol selectively dissolves the aromatic fraction while insoluble plant waxes form a precipitate. The wax-containing ethanol is pressure-filtered through a leaf filter to remove the waxy residue, leaving a clear amber ethanol-aromatic solution.
Chilling & Absolute Recovery
The ethanolic solution is cooled to −15°C to −20°C in a refrigerated vessel for 8–12 hours to precipitate residual wax fractions and fatty acid esters. After cold filtration through a chilled leaf filter, the clarified solution is concentrated under vacuum at 30–35°C to remove ethanol (>95% recovery), yielding jasmine absolute as a viscous, deep orange-brown liquid at 85–95% purity. GC-MS profiling for benzyl acetate content and ISO 9842 parameters completes QC before filling.
Applications
- Luxury fine perfumery — jasmine absolute is a cornerstone ingredient of the Oriental and Floral fragrance families, used in Chanel No. 5, Joy, and countless classic compositions at 0.5–10% dosage
- High-end cosmetics and skin care — moisturising creams, facial oils, and body lotions where jasmine absolute provides both fragrance and skin-conditioning benefits
- Aromatherapy products — used in diffuser blends, massage oils, and bath preparations for its reputed mood-enhancing and aphrodisiac properties
- Incense and agarbatti manufacturing — jasmine absolute and concrete are key inputs for premium incense sticks and dhoop in Indian traditional markets
- Jasmine water (hydrosol) — the aqueous phase from processing sold as a floral water for skincare toners and culinary uses in Indian and Middle Eastern cuisines
- Nutraceutical research — phytol and other terpenoids from jasmine investigated for antimicrobial and anti-inflammatory properties
- Export markets — jasmine absolute from India (Grasse-standard) exported to France, USA, UAE, and Japan for incorporation into international fragrance formulations
Key Features
Rapid-Cycle Extraction for Freshness Preservation
Extraction vessels are designed for fast charging and draining, and temperature-controlled at 20–25°C to process flowers within the 4-hour post-harvest window before enzymatic degradation of benzyl acetate begins. Refrigerated flower-holding rooms (5–8°C) can be supplied as part of the plant package to extend this window.
Sub-40°C Vacuum Evaporation
Falling-film evaporators operating at 40–70 mbar maintain concrete temperature below 40°C, preventing thermal isomerisation of linalool and loss of top-note volatile esters, ensuring the finished absolute meets Grasse-quality benchmarks for GC-MS aromatic profile.
GMP-Compliant SS 316L Construction
All product-contact surfaces are fabricated in SS 316L with electro-polished internal finish (Ra ≤ 0.8 µm), food-grade PTFE or silicone gaskets, and validated CIP spray-ball cleaning systems to support pharmaceutical and cosmetic grade certifications including ISO 22716 GMP for cosmetics.
Closed-Loop Hexane Recovery (>97%)
The fully enclosed solvent circuit with multi-stage shell-and-tube condensers and activated-carbon safety trap captures hexane vapours before they reach the atmosphere, reducing operating cost, meeting CPCB emission norms, and complying with PESO Class-A petroleum solvent regulations.
Multi-Flower Product Platform
The plant design is product-neutral; between crop seasons the same equipment processes rose, tuberose, marigold, or other floral raw materials after validated CIP cleaning. This maximises capital utilisation across India's staggered floral harvest calendar.
Frequently Asked Questions
What is the expected yield of jasmine absolute per 100 kg of fresh jasmine flowers?
What is the key difference between Jasminum grandiflorum and Jasminum sambac absolute in terms of commercial use?
How does Mechotech ensure the hexane extraction plant meets Indian regulatory requirements?
What is the shelf life of jasmine absolute and how should it be stored?
Ready to discuss your project?
Get a free quote and technical consultation from our engineering team.