Carrot Seeds Oil Distillation Plant
Carrot Seeds Oil Distillation Plant
Carrot seed (Daucus carota) essential oil is distilled from the dried seeds of wild carrot, yielding a complex, earthy-woody oil rich in carotol (40–70%), daucol, and β-bisabolene. Carotol is a sesquiterpene alcohol with demonstrated skin regenerative and antifungal properties, making carrot seed oil one of the most prized ingredients in premium anti-aging skincare formulations and professional aromatherapy. Mechotech manufactures carrot seed oil distillation plants designed for the gentle low-steam distillation that preserves the delicate sesquiterpene profile and maximises carotol content.
Mechotech's carrot seed oil distillation plants are configured for steam or hydro-distillation of dried Daucus carota seeds, with typical oil yields of 1–2% by dry seed weight. The oil is a complex mixture of sesquiterpene hydrocarbons and alcohols dominated by carotol (40–70%). Because carotol and daucol are heavier, higher-boiling sesquiterpene alcohols, distillation requires a longer runtime (3–6 hours) at carefully controlled steam temperature to avoid thermal degradation. The plant features a SS 316L still pot, a large-area shell-and-tube condenser for efficient recovery of heavy sesquiterpene vapours, and a Florentine flask separator. Carrot seed oil (specific gravity 0.900–0.950) floats on the hydrosol for clean gravity separation. Batch capacities range from 100 kg to 1,000 kg of dry seed per cycle.
Manufacturing Process
Raw Material Preparation
Dried wild carrot seeds (Daucus carota var. carota, not cultivated carrot) are cleaned to remove stalks, chaff, and foreign matter using a vibratory screen. Seeds are dried to ≤ 10% moisture. Light milling or cracking of seeds before loading is recommended to improve extraction of bound sesquiterpene alcohols, particularly carotol, which is more tightly bound in the seed matrix than monoterpene constituents.
Loading the Still
Prepared carrot seeds are charged into the SS 316L still pot evenly over the perforated false bottom. Given the relatively low yield and high value of the oil, batch sizes are typically 100–500 kg of dry seed per cycle to allow precise quality monitoring. For hydro-distillation, demineralised water is added at a 4:1 ratio; for steam distillation, the still is sealed and connected to the steam supply.
Steam Distillation
Live steam at 0.5–1.0 bar is injected through the false bottom. Monoterpene hydrocarbons (α-pinene, sabinene) distil in the first 1–2 hours; the heavier sesquiterpene alcohol fractions (carotol, daucol) require an extended distillation run of 3–6 hours total at still temperatures of 100–105 °C. Distillation endpoint is identified by monitoring oil flow rate in the Florentine flask sight glass.
Condensation
The vapour mixture passes through an insulated gooseneck pipe into the shell-and-tube condenser. The condenser is sized with generous surface area to ensure full condensation of the heavier sesquiterpene vapours, which have lower vapour pressures than monoterpenes and require higher condenser efficiency for complete recovery. Cooling water circulates counter-currently, maintaining condensate temperature at 30–40 °C.
Oil-Water Separation
Condensate flows into the SS 316L Florentine flask where carrot seed oil floats above the hydrosol by gravity. The oil is collected continuously into a separate vessel. Given the extended distillation time and low oil yield, the Florentine flask volume is sized appropriately to maintain adequate oil layer depth for clean separation even at low flow rates during the tail end of distillation.
Quality Testing & Packing
Carrot seed oil is tested for specific gravity (0.900–0.950 at 25 °C), refractive index (1.489–1.502), carotol content (≥40% by GC-MS), optical rotation, and characteristic earthy-woody organoleptic profile. The oil must be free of synthetic adulterants. Conforming oil is filled into dark amber glass vials or aluminium containers under nitrogen blanket, given its sensitivity to light and oxidation.
Applications
- Premium anti-aging skincare — serums, face oils, and creams leveraging carotol's skin-regenerative properties
- Fragrance industry — earthy, woody drydown note in niche and oriental perfumes
- Professional aromatherapy — lymphatic drainage, detoxification, and liver-supportive blends
- Hair care — scalp nourishing treatments and hair growth formulations
- Cosmetic active ingredient — high-value ingredient in natural cosmetic product lines
- Traditional herbal medicine — diuretic and digestive support formulations
- Spa and wellness products — massage oils and body care preparations
Key Features
Extended Distillation for Sesquiterpene Recovery
The plant supports long distillation runs of 3–6 hours necessary for complete recovery of heavy sesquiterpene alcohols (carotol, daucol) that require sustained steam contact for full extraction. Steam pressure regulation prevents thermal degradation of these high-boiling, heat-sensitive constituents.
High-Efficiency Condenser
The shell-and-tube condenser is sized with additional heat-transfer area to efficiently condense heavy sesquiterpene vapours that have lower vapour pressures than typical monoterpenes, ensuring maximum recovery of the highest-value carotol fraction.
SS 316L Cosmetic-Grade Construction
All wetted surfaces are SS 316L fabricated and electropolished, meeting both pharmaceutical GMP and cosmetic-grade manufacturing standards required for premium skincare ingredient applications.
Low Steam Pressure Operation
The plant is engineered for gentle distillation at 0.5–1.0 bar steam pressure, minimising thermal stress on heat-sensitive sesquiterpene alcohols and esters to deliver a carotol-rich oil with the authentic earthy-woody aromatic profile demanded by premium fragrance and skincare buyers.
Precise Batch Documentation
Full batch record system with parameters including steam pressure, distillation duration, temperature profile, and oil yield per batch supports traceability requirements for cosmetic ingredient suppliers and GC-MS certificate attachment for each container.
Frequently Asked Questions
What oil yield can I expect from carrot seeds?
Why is carrot seed oil valuable despite low yield?
How long does carrot seed oil distillation take?
Can the plant also process other sesquiterpene-rich botanicals?
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