5L Fully Automated Compound Remediation System
A bench-scale system that refines a finished botanical extract, selectively removing unwanted constituents at room temperature while preserving the aromatics and actives.
COMERG • Clove extraction
Whole Clove
Syzygium aromaticum
Turn clove buds into a powerful, food-grade extract with COMERG equipment. Our cold, room-temperature, low-pressure process captures the deep, warm sweetness of the bud, the eugenol that defines clove and gives it one of the strongest natural antioxidant profiles of any spice.
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70% eugenol
The spice
The dried flower bud
Clove is the unopened flower bud of the tropical evergreen Syzygium aromaticum, picked and dried before it can bloom. Its warm, sweet, slightly numbing aroma comes overwhelmingly from eugenol, the compound that has made clove a fixture of spice racks, perfumery and traditional dental preparations for centuries.
The buds are milled and processed cold, so the finished extract carries the full depth of the spice. Nothing is added, and the natural balance of eugenol and its supporting compounds is preserved.
Raw material
Botanical nameSyzygium aromaticum
FamilyMyrtaceae
Plant partBud
ConditionDried, ground
OriginIndia
AvailabilityAll year
The extract
What the process delivers
Run on COMERG equipment, clove buds yield a standardised, high-strength extract, batch after batch. Because the extraction is cold and solvent-light, with no high heat, the deep warm character carries straight through to the finished oil. The figures below are typical of a standardised BClo-90.1 grade.
≥90%Volatile oil v/w
70%Eugenol
0.011DPPH IC50 mg/ml
<25 °CExtraction temp
97%Compound recovery
~10 kgBuds per kg extract
The method
Cold extraction, in three steps
No heat, no leftover solvent. This is what happens inside a COMERG aerosol system, and why the extract keeps the full clove character.
1
Pressurised R134a flooding
Non-toxic liquefied R134a gas is introduced to the milled clove buds at controlled, low pressure. There is no heat, the cycle begins and stays at room temperature.
2
Selective aromatic dissolution
The liquid gas gently dissolves the eugenol, eugenyl acetate and caryophyllene, while the heat-sensitive top notes stay structurally intact.
3
Recovery and pure extract
The R134a is fully recovered and recycled in a closed loop. What is left is a concentrated clove extract, at least 90% volatile oil, with under 0.1 g/kg residue.
Aromatic profile
The compound fingerprint
Principal constituents identified by GC-MS, each above 1%. Eugenol dominates the profile, backed by eugenyl acetate and caryophyllene, which together give clove its deep, warm, faintly sweet signature.
0%30%50%70%+
Other extractables present. Per-batch GC-MS report available on request.
Specification
BClo-90.1 at a glance
Identity & origin
Botanical nameSyzygium aromaticum
Plant partBud
OriginIndia
Product codeBClo-90.1
CAS No.84961-50-2
EINECS No.284-638-7
Production
MethodLiquefied-gas extraction
TemperatureBelow 25 °C
SolventFood-grade (Dir. 97/60/EC)
Solvent residue< 0.1 g/kg
StandardisationDeclared volatile oil
Concentration1 kg ≈ 8-12 kg buds
Physical
AppearanceYellow clear oily liquid
Volatile oil≥ 90% v/w (ASTA)
INCI nameEugenia Caryophyllus Extract
Density1060 g/l
Refractive index1.5264
Acid value43.1 mg KOH/g
Solubility & output
In oilsFully soluble
In 40% alcoholPartial
In waterInsoluble
Flash point> 61 °C
ContainerLined aluminium bottle
Shelf life2 years
Why clove, why cold
A powerful bud, captured whole
A concentrated bud
Syzygium aromaticum, India
Plant partBuds, milled
Buds per kg extract~8-12 kg
Volatile oil≥ 90% v/w
AntioxidantDPPH IC50 0.011 mg/ml
Captured cold
Versus steam distillation
Eugenol70% retained
Eugenyl acetate13%
Process temperature< 25 °C
Top notesPreserved
Applications
What you can make
Food & flavour
Bakery & confectionery
Fine perfumery
Oral & dental care
Natural antioxidant
Candles & home fragrance
The extract can be taken concentrated or diluted in a carrier oil to suit the application. Typical filling rates for the concentrated extract in food are 20 to 200 mg per kilogram of product.
Why the COMERG line
Built for potent spice like clove
The strength and antioxidant power above are not an accident of the bud alone, they are what the right equipment makes repeatable. Our line is engineered around the things that matter when you process a high-value spice.
Room temperatureR134a aerosol extraction works cold and at low pressure, so the volatile top notes are never cooked off.
Keeps the eugenolEugenol carries almost the whole clove character and its antioxidant strength. Cold extraction concentrates it cleanly into the extract.
Fully automatedClosed-loop systems run the cycle for you, so results stay consistent and one operator can handle the line.
Fast cycles, high yieldLow-pressure extraction is quick and recovers up to 97% of the bud's compounds, more than older high-pressure CO2 lines.
Scales with youFrom a 10 l pilot unit to 2000 l production, the same method grows from R&D batches to full output.
Clean and economicalIt uses around 85% less energy than solvent methods and needs no special hazardous-location facility.
Why it wins
Compared to the alternatives
Against steam distillation, solvent and CO2, cold R134a extraction keeps more of the clove, with a clean, high-strength result.
| Feature | COMERG R134a | Steam distillation | Solvent | CO₂ supercritical |
|---|---|---|---|---|
| Process temperature | < 25 °C (room temp) | 100-150 °C | 40-70 °C | 31-80 °C |
| Aromatic preservation | 95%+ | 60-75% | ~85% | ~80% |
| Compound recovery | up to 97% | 70-85% | 80-90% | 85-92% |
| Eugenol | Concentrated | Retained, some loss | Retained | Mostly retained |
| Solvent residue | < 0.1 g/kg | None | Needs post-purge | None |
| Energy use | 85% less vs solvent | High | Medium-high | Very high |
| Special facility | Not required | Not required | Required | High-pressure safety |
From bud to extract
The machines for clove
A complete COMERG line takes clove from raw bud to a finished extract. These are the core stages, each available as standalone equipment.
Aerosol extraction
The heart of the line. Liquefied-gas systems that pull clove oil cold, below 25 °C, from 10 l pilot units up to 2000 l.
Room temp • 97% recoveryView system
Bud separation
Cleans and separates the buds from stalk and debris before milling, so only the aromatic bud reaches the extractor.
Prep stageView machine
The complete spice line
From a 10 l pilot system to industrial 2000 l lines, the same cold process scales with your volume.
10 l - 2000 lBrowse all equipment
Product specificationFull composition, properties, packaging and handling for clove extract BClo-90.1.
Download PDF
Questions
Clove extraction, explained
A 100% natural clove bud extract, product code BClo-90.1. It reaches at least 90% volatile oil, led by around 70% eugenol, with no additives.
Liquefied food-grade gas extraction at room temperature, below 25 °C, and low pressure. Because there is no high heat, the delicate aromatic compounds are preserved and solvent residue stays below 0.1 g/kg.
Clove's character and its strong antioxidant activity both come from eugenol and a small set of supporting compounds. Cold R134a extraction concentrates them cleanly without prolonged heat altering the profile.
Roughly 1 kg of extract represents around 8 to 12 kg of dried, milled clove buds, a high yield that reflects how oil-rich the bud is.
Yes. The same cold process runs from a 10 l pilot unit to 2000 l production systems, so you can start small and grow without changing method.
It is produced with a food-grade solvent per Directive 97/60/EC. It is a raw material for formulation, not intended for direct consumption or undiluted topical use, and users are responsible for compliance with applicable legislation.
Yes. A per-batch GC-MS analysis is available on request, and a Safety Data Sheet per 2006/1907/EC is supplied with the product.
Set up your clove line
Tell us your throughput and target product. We will recommend the right system, share a yield estimate for your clove buds, and reply with pricing and lead time, usually within 48 hours.
COMERG extracts are raw materials for product formulation. They are not intended for direct consumption or for undiluted topical application in cosmetics, perfumery or aromatherapy. This information is provided to the best of our knowledge and is not a substitute for prior testing of suitability for the intended use. Keep away from children.
The clove line
Equipment for processing clove
The machines below make up the clove line, the equipment that takes the bud through to a finished extract. Request a quote on any unit and we will reply with pricing and lead time.
Showing 17–26 of 26 results
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6″ SS Wiped Film Distillation System
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EtOH Fully Automated Ethanol Extraction System
A scalable 20-1000L ethanol platform that washes botanicals with chilled food-grade ethanol and recovers the solvent in a closed loop for clean, full-spectrum extracts.
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Gas Chromatography Analysis System
A compact benchtop GC-FID analyser with a built-in hydrogen generator and dual columns for fast, low-cost potency, aroma-profile and residual-solvent testing.
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Mold & Yeast Remediation System
A low-pressure decontamination system that removes mold, yeast and microbial load from botanical material and extracts at room temperature, with no heat or irradiation.
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SHW 120L Subcritical Hot Water Extraction System
A solvent-free 120L production system that extracts polar, water-soluble compounds with pressurised hot water, delivering both a concentrated extract and an aromatic water.
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SHW 60L Subcritical Hot Water Extraction System
A solvent-free 60L system that extracts polar, water-soluble compounds with pressurised hot water, yielding both a concentrated extract and a fragrant aromatic water.
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Stick & Seed Separation System
A sifting and air-separation line that sorts dried botanical biomass into three clean fractions – flower and leaf, stalk, and seed – ready for extraction or sale.