1000L HTE Fully Automated Aerosol Extraction System
An industrial-scale aerosol extraction system for very high-volume, room-temperature, residue-free processing of any botanical.
COMERG • Calendula extraction
Calendula Marigold
Calendula officinalis L.
Turn calendula flowers into a soothing, skin-loving cosmetic extract with COMERG equipment. Our cold, room-temperature, low-pressure process captures the calming terpenoids and golden carotenoids of the pot marigold, the compounds skincare formulators reach for, with no heat to degrade them.
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Skin-soothing extract
The flower
The golden healer of the garden
Calendula, the pot marigold, has been a skin-soothing remedy in Europe since the twelfth century. Its bright orange petals are rich in calming terpenoids like bisabolol and the faradiol family, plus the carotenoids that give the flower, and the extract, their warm golden-orange colour.
We work with dried calendula flowers, milled and processed cold so those gentle, skin-friendly compounds survive. Nothing is added, and the soothing, antioxidant character of the bloom carries straight into the extract. This is true Calendula officinalis, the pot marigold, not the unrelated Tagetes.
Raw material
Botanical nameCalendula officinalis L.
FamilyAsteraceae
Plant partFlowers
ConditionDried, ground
OriginBulgaria
AvailabilityAll year
The extract
What the process delivers
Run on COMERG equipment, calendula flowers yield a rich, standardised cosmetic extract, batch after batch. Because the extraction is cold and solvent-light, with no high heat, the soothing terpenoids and the golden carotenoid colour carry straight through. The figures below are typical of a standardised BMar-15.1 grade.
≥15%Volatile oil v/w
8.3%a-Bisabolone oxide
10.32DPPH IC50 mg/ml
<25 °CExtraction temp
~120 kgFlowers per kg extract
<0.1 g/kgSolvent residue
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 soothing actives and the warm colour of the flower.
1
Pressurised R134a flooding
Non-toxic liquefied R134a gas is introduced to the milled calendula flowers at controlled, low pressure. There is no heat, the cycle begins and stays at room temperature.
2
Selective compound dissolution
The liquid gas gently dissolves the soothing terpenoids, the carotenoids and the lipophilic actives, while the delicate, skin-friendly molecules stay intact.
3
Recovery and pure extract
The R134a is fully recovered and recycled in a closed loop. What is left is a concentrated calendula extract, at least 15% volatile oil, with under 0.1 g/kg residue.
Composition profile
The compound fingerprint
Principal constituents identified by GC-MS, each above 1%. The soothing bisabolone oxides lead, alongside the green terpenes, while the heavier carotenoids and faradiol-type esters carry calendula's skincare value and its colour.
0%4%6%8%+
Faradiol-type esters and carotenoids carry calendula's soothing, antioxidant character and its warm colour. Other extractables present. Per-batch GC-MS report available on request.
Specification
BMar-15.1 at a glance
Identity & origin
Botanical nameCalendula officinalis L.
Plant partFlowers
OriginBulgaria
Product codeBMar-15.1
CAS No.84776-23-8
EINECS No.283-949-5
Production
MethodLiquefied-gas extraction
TemperatureBelow 25 °C
SolventFood-grade (Dir. 97/60/EC)
Solvent residue< 0.1 g/kg
StandardisationDeclared volatile oil
Concentration1 kg ≈ 100-140 kg flowers
Physical
AppearanceRed-orange viscous liquid
Volatile oil15-20% v/w (ASTA)
INCI nameCalendula Officinalis Flower Extract
Density995-1059 g/l
Refractive index1.49-1.53
Acid value19.8-43.1 mg KOH/g
Solubility & output
In oilsFully soluble
In 40% alcoholPartial
In waterInsoluble
Flash point> 100 °C
ContainerLined aluminium bottle
Shelf life2 years
Why calendula, why cold
A soothing flower, captured whole
A concentrated bloom
Calendula officinalis, Bulgaria
Plant partFlowers, milled
Flowers per kg extract~100-140 kg
Volatile oil≥ 15% v/w
AntioxidantDPPH IC50 10.32 mg/ml
Captured cold
Versus heat-based methods
Soothing terpenoidsPreserved
Carotenoid colourRetained
Process temperature< 25 °C
Skin-friendly activesIntact
Applications
What you can make
Soothing skincare
Balms & creams
Sensitive & after-sun
Serums & facial oils
Baby & barrier care
Natural cosmetics
This calendula extract is for cosmetic use, not for food. It can be used concentrated or diluted in a carrier oil, with typical filling rates of 0.1 to 0.3% in the finished formula. Like all our extracts it is a raw material for formulation, not for direct or undiluted use.
Why the COMERG line
Built for delicate actives like calendula
Calendula's value is in soothing terpenoids and carotenoids that heat and oxygen can degrade. Our line is engineered around protecting exactly that kind of gentle, skin-friendly chemistry.
Room temperatureR134a aerosol extraction works cold and at low pressure, so the soothing actives and the carotenoid colour are never cooked off.
Protects the activesThe bisabolol-family terpenoids and faradiol esters behind calendula's calm come through intact, not heat-damaged.
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 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 calendula's soothing actives and its golden colour.
| Feature | COMERG R134a | Steam distillation | Solvent | CO₂ supercritical |
|---|---|---|---|---|
| Process temperature | < 25 °C (room temp) | 100-150 °C | 40-70 °C | 31-80 °C |
| Soothing actives | Preserved | Partly degraded | Mostly kept | Mostly kept |
| Carotenoid colour | Retained | Faded by heat | Retained | Retained |
| Compound recovery | up to 97% | 70-85% | 80-90% | 85-92% |
| 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 flower to extract
The machines for calendula
A complete COMERG line takes calendula from fresh flower 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 calendula's actives cold, below 25 °C, from 10 l pilot units up to 2000 l.
Room temp • 97% recoveryView system
Conveyor dryer
Dries the freshly picked marigold flowers gently and evenly before milling, protecting the colour and the soothing actives.
Prep stageView machine
The complete botanical 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 calendula extract BMar-15.1.
Download PDF
Questions
Calendula extraction, explained
A 100% natural calendula flower extract from Calendula officinalis, product code BMar-15.1. It reaches at least 15% volatile oil, rich in soothing terpenoids and carotenoids, 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 skin-friendly compounds are preserved and solvent residue stays below 0.1 g/kg.
Calendula's soothing terpenoids and its carotenoid colour are sensitive to heat and oxidation. Cold R134a extraction concentrates them gently, so the extract keeps its skincare value and its warm golden tone.
Roughly 1 kg of extract represents around 100 to 140 kg of calendula flowers.
No. This calendula extract is for cosmetic use, not for food. Typical filling rates are 0.1 to 0.3% in the finished formula, and it is not intended for direct consumption or undiluted use.
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.
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 calendula line
Tell us your throughput and target product. We will recommend the right system, share a yield estimate for your calendula flowers, 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 calendula line
Equipment for processing calendula
The machines below make up the calendula line, the equipment that takes the flower through to a finished extract. Request a quote on any unit and we will reply with pricing and lead time.
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