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 • Bulgarian rose extraction
Bulgarian Rose
Rosa damascena Mill.
Turn Bulgarian rose into a perfumery-grade absolute, oil or full-spectrum extract with COMERG equipment. Our cold, room-temperature, low-pressure process captures the full bouquet of Rosa damascena, including the delicate phenylethyl alcohol that steam distillation leaves behind in the water.
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59% phenylethyl alcohol
The flower
The queen of flowers
Rosa damascena, the Damask rose, is grown in Bulgaria's famed Rose Valley and hand-picked at dawn through a brief season in May and June. It is one of the most prized aromatics in the world, its scent led by phenylethyl alcohol and citronellol, soft, deep and unmistakably rose.
The flowers are processed fresh, within hours of picking, by a gentle low-temperature method, so the extract carries the true bouquet of the living bloom. Nothing is added, and the natural compound balance of the flower is preserved.
Raw material
Botanical nameRosa damascena Mill.
FamilyRosaceae
Plant partFlower
ConditionFresh
OriginBulgaria, Rose Valley
SeasonMay - June
The extract
What the process delivers
Run on COMERG equipment, fresh rose yields a standardised, high-purity extract, batch after batch. Because the extraction is cold and solvent-light, with no high heat, the true bouquet of the flower carries straight through to the finished oil. The figures below are typical of a standardised BRda-20.1 grade.
≥20%Volatile oil v/w
59%Phenylethyl alcohol
12%beta-Citronellol
<25 °CExtraction temp
97%Compound recovery
~400 kgFlowers 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 rose bouquet.
1
Pressurised R134a flooding
Non-toxic liquefied R134a gas is introduced to the fresh rose flowers 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 phenylethyl alcohol, citronellol and the other volatiles, while the heat-sensitive rose 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 rose extract, at least 20% volatile oil, with under 0.1 g/kg residue.
Aromatic profile
The compound fingerprint
Principal constituents identified by GC-MS, each above 1%. Phenylethyl alcohol, the very heart of the rose scent, leads the profile, the same water-soluble compound that steam distillation largely loses to the water.
0%20%40%60%+
Other extractables present. Per-batch GC-MS report available on request.
Specification
BRda-20.1 at a glance
Identity & origin
Botanical nameRosa damascena Mill.
Plant partFlower
OriginBulgaria
Product codeBRda-20.1
CAS No.90106-38-0
EINECS No.290-260-3
Production
MethodLiquefied-gas extraction
TemperatureBelow 25 °C
SolventFood-grade (Dir. 97/60/EC)
Solvent residue< 0.1 g/kg
StandardisationDeclared volatile oil
Concentration1 kg ≈ 400 kg flowers
Physical
AppearanceRed-yellow oily liquid
StateSolid below 23 °C
Volatile oil≥ 20% v/w (ASTA)
INCI nameRosa Damascena Flower Extract
Acid value11 mg KOH/g
Flash point> 61 °C
Solubility & output
In oilsFully soluble
In 40% alcoholPartial
In waterInsoluble
FormsAbsolute, oil, extract
ContainerLined aluminium bottle
Shelf life2 years
Why rose, why cold
A rare flower, captured whole
A fleeting harvest
Rosa damascena, Bulgaria
SeasonMay - June
HarvestHand-picked at dawn
Flowers per kg extract~400 kg
ProcessedFresh, within hours
Captured cold
Versus steam distillation
Phenylethyl alcohol59% retained
beta-Citronellol12%
Process temperature< 25 °C
Top notesPreserved
Applications
What you can make
Fine perfumery
Skincare & cosmetics
Absolute & concrete
Aromatherapy & wellness
Food & flavour
Luxury candles & home
The extract can be taken concentrated or diluted in a carrier oil to suit the application, from a few drops in a fine fragrance to a measured dose in a cosmetic base.
Why the COMERG line
Built for delicate botanicals like rose
The bouquet and purity above are not an accident of the flower alone, they are what the right equipment makes repeatable. Our line is engineered around the things that matter when you process a precious aromatic.
Room temperatureR134a aerosol extraction works cold and at low pressure, so the volatile rose top notes are never cooked off.
Keeps the rose's heartPhenylethyl alcohol, the water-soluble core of rose scent, is lost to the water in steam distillation. Cold extraction keeps it, around 59% of the profile.
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 flower'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 harvest volume.
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 rose, above all the water-soluble notes that steam sends down the drain.
| 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% |
| Phenylethyl alcohol | Retained | Largely lost to water | 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 field to extract
The machines for rose
A complete COMERG line takes rose from the field to a finished absolute or oil. These are the core stages, each available as standalone equipment.
Aerosol extraction
The heart of the line. Liquefied-gas systems that pull rose oil cold, below 25 °C, from 10 l pilot units up to 2000 l.
Room temp • 97% recoveryView system
Botanical harvester
Brings the bloom in fast. Rose must reach the press within hours of the dawn pick, before the oil fades.
Field stageView machine
The complete rose line
From a 10 l pilot system to industrial 2000 l lines, the same cold process scales with your harvest.
10 l - 2000 lBrowse all equipment
Product specificationFull composition, properties, packaging and handling for rose extract BRda-20.1.
Download PDF
Questions
Rose extraction, explained
A 100% natural Bulgarian rose extract, product code BRda-20.1, the basis for a rose absolute, oil or full-spectrum extract. It reaches at least 20% volatile oil, led by around 59% phenylethyl alcohol, 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.
Rose's signature note, phenylethyl alcohol, is water-soluble and is largely lost to the water in steam distillation, which is how rose water is made. Cold R134a extraction keeps it, around 59% of the profile, so the extract smells far closer to the living flower.
Roughly 1 kg of extract represents around 400 kg of fresh flowers, hand-picked at dawn in the short May to June season, which is part of what makes rose so precious.
Yes. The same cold process runs from a 10 l pilot unit to 2000 l production systems, so you can start small and grow with your harvest 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 rose line
Tell us your throughput and target product. We will recommend the right system, share a yield estimate for your rose material, 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 rose line
Equipment for processing rose
The machines below make up the rose line, the equipment that takes the flower through to an absolute, oil or 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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SHW 120L Subcritical Hot Water Extraction System
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SHW 60L Subcritical Hot Water Extraction System
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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.