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 • Linden extraction
Linden Blossom
Tilia tomentosa Moench.
Capture the honeyed scent of lime blossom with COMERG equipment. Our cold, room-temperature, low-pressure process lifts the soft, sweet, lightly green linden note, the rose-honey phenylethyl alcohol and its esters, straight from the fresh flower, one of perfumery's most loved and most fleeting scents.
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25% phenylethyl alcohol
The flower
A scent that lasts two weeks a year
Linden, the lime blossom, fills whole streets with a honeyed, slightly green sweetness for a brief window each summer. The scent comes largely from phenylethyl alcohol and its benzoate ester, the rose-honey facet perfumers prize, lifted by a touch of citronellol. The flowers are wonderfully nectarous, which is why bees make the famous linden honey from them.
We work with fresh blossoms, picked in late spring and processed cold so that soft, fleeting note survives. This is the silver linden, Tilia tomentosa, and like all linden it gives very little to a still, which is part of what makes a true linden extract so prized.
Raw material
Botanical nameTilia tomentosa Moench.
FamilyMalvaceae
Plant partBlossoms
ConditionFresh, cut
OriginBulgaria
HarvestMay to June
The extract
What the process delivers
Run on COMERG equipment, fresh linden yields a rich, true-to-bloom floral extract, batch after batch. Because the extraction is cold and solvent-light, with no high heat, the soft honey-rose note carries straight through to the finished material. The figures below are typical of a standardised BLin-50.1 grade.
25%Phenylethyl alcohol
≥50%Volatile oil v/w
<25 °CExtraction temp
97%Compound recovery
~650 kgBlossoms per kg extract
<0.1 g/kgSolvent residue
The method
Cold extraction, in three steps
No heat, no leftover solvent. This is what lets a flower that gives almost nothing to a still yield its true scent inside a COMERG aerosol system.
1
Pressurised R134a flooding
Non-toxic liquefied R134a gas is introduced to the fresh linden blossoms 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 phenylethyl alcohol, its esters, citronellol and the soft floral compounds, the delicate molecules that carry linden's honeyed note.
3
Recovery and pure extract
The R134a is fully recovered and recycled in a closed loop. What is left is a concentrated linden extract, at least 50% 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 leads, the rose-honey heart of the linden note, supported by its benzoate ester and citronellol, with natural plant waxes making up much of the rest.
0%10%18%25%+
The scent comes from phenylethyl alcohol, phenylethyl benzoate and citronellol; the nonadecane, heneicosane and tricosane are natural plant waxes carried through from the flower. Other extractables present. Per-batch GC-MS report available on request.
Specification
BLin-50.1 at a glance
Identity & origin
Botanical nameTilia tomentosa Moench.
Plant partBlossoms
OriginBulgaria
Product codeBLin-50.1
CAS No.94167-04-1
EINECS No.303-402-7
Production
MethodLiquefied-gas extraction
TemperatureBelow 25 °C
SolventFood-grade (Dir. 97/60/EC)
Solvent residue< 0.1 g/kg
StandardisationDeclared volatile oil
Concentration1 kg ≈ 600-700 kg blossoms
Physical
AppearanceYellow oily liquid
Volatile oil≥ 50% v/w (ASTA)
INCI nameTilia Tomentosa Flower Extract
DensityOn request
Refractive indexOn request
Flash pointOn request
Solubility & output
In oilsFully soluble
In 40% alcoholPartial
In waterInsoluble
UseEdible & fragrance
ContainerLined aluminium bottle
Shelf life2 years
Why linden, why cold
A fleeting floral, captured whole
A precious bloom
Tilia tomentosa, Bulgaria
Plant partFresh blossoms
Blossoms per kg extract~600-700 kg
Volatile oil≥ 50% v/w
HarvestMay to June, in bloom
Captured cold
Versus distillation, which gives little
Phenylethyl alcohol25% kept
Rose-honey noteCarried through
Process temperature< 25 °C
Soft floral facetsIntact
Applications
What you can make
Bakery & confectionery
Honey & sweet products
Beverages & teas
Fine perfumery
Skincare & cosmetics
This linden extract is edible and can be used concentrated or diluted in a carrier to suit the application. Typical filling rates for the concentrated extract in food are 0.3 to 5 mg per kilogram of product. Like all our extracts it is a raw material for formulation, not for direct or undiluted use.
Why the COMERG line
Built for the flowers others cannot capture
Linden is a perfect example. A flower that gives almost nothing to a still gives up its honeyed scent to a cold, gentle process. Our line is engineered around exactly that kind of fragile, high-value bloom.
Room temperatureR134a aerosol extraction works cold and at low pressure, so the soft, fleeting honey-rose note is never cooked off.
Captures the uncapturableWhere distillation yields almost nothing, cold gas extraction lifts a true, honeyed linden that smells like the living flower.
Fully automatedClosed-loop systems run the cycle for you, so results stay consistent and one operator can handle the line.
Gentle, fast cyclesLow-pressure extraction is quick and recovers up to 97% of what the flower will give, with no thermal damage.
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
For a delicate flower like linden the contrast is stark, distillation gives very little, while cold R134a extraction delivers a true, honeyed material.
| Feature | COMERG R134a | Steam distillation | Solvent (absolute) | CO₂ supercritical |
|---|---|---|---|---|
| Process temperature | < 25 °C (room temp) | 100-150 °C | 40-60 °C | 31-80 °C |
| Suits linden | Yes, true note | No, very low yield | Possible, harder | Possible |
| Fragile molecules | Preserved | Largely lost | Mostly kept | Mostly kept |
| 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 bloom to extract
The machines for linden
A complete COMERG line takes linden from fresh bloom 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 lift the true linden scent cold, below 25 °C, from 10 l pilot units up to 2000 l.
Room temp • true noteView system
Botanical harvester
Brings in the fresh linden blossom at the short peak of its bloom, so the most fragrant flowers reach the extractor fast.
Field stageView machine
The complete floral 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 linden extract BLin-50.1.
Download PDF
Questions
Linden extraction, explained
A 100% natural linden flower extract from Tilia tomentosa, product code BLin-50.1. It reaches at least 50% volatile oil, led by around 25% phenylethyl alcohol, the rose-honey heart of the linden note, with no additives.
Linden flowers give very little oil, and roughly 1 kg of extract represents 600 to 700 kg of blossom. The scent is also famously fleeting, so a true, stable linden extract is rare and highly valued.
Liquefied food-grade gas extraction at room temperature, below 25 °C, and low pressure. Because there is no high heat, the delicate floral compounds are preserved and solvent residue stays below 0.1 g/kg.
Roughly 1 kg of extract represents around 600 to 700 kg of fresh linden blossom, which is part of why the material is so precious.
Yes. Linden extract is edible, with typical filling rates of 0.3 to 5 mg per kilogram of product. It suits bakery, honey and sweet products and beverages, as well as perfumery and cosmetics, and is a raw material for formulation rather than for 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 linden line
Tell us your throughput and target product. We will recommend the right system, share a yield estimate for your linden blossom, 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 linden line
Equipment for processing linden
The machines below make up the linden line, the equipment that takes the bloom through to a finished extract. Request a quote on any unit and we will reply with pricing and lead time.
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