Executive Summary
A nutraceutical ingredient manufacturer required a fully automated, GMP-oriented Marigold Lutein Extraction Plant to produce high-purity Lutein, Zeaxanthin, and natural carotenoid concentrates from Marigold Flowers (Tagetes erecta). The products were intended for dietary supplements, eye health formulations, functional foods, pharmaceutical preparations, animal nutrition, and cosmetic applications.
The customer required a turnkey solution capable of maximising carotenoid recovery, preserving pigment stability, minimising solvent consumption, and consistently producing export-grade lutein extracts conforming to international nutraceutical standards.
Mechotech successfully designed, engineered, manufactured, supplied, installed, and commissioned a Marigold Lutein Extraction Plant integrating advanced solvent extraction, oleoresin production, saponification, purification, crystallisation, vacuum solvent recovery, drying, and intelligent PLC-SCADA automation.
Customer Background
The customer manufactures botanical ingredients for nutraceutical companies, pharmaceutical manufacturers, functional food producers, dietary supplement brands, animal feed manufacturers, cosmetic companies, food ingredient suppliers, and global export markets. Growing worldwide demand for eye health supplements and natural carotenoids required expansion into a modern GMP-oriented manufacturing facility.
Customer Challenges
Before modernisation, the customer faced:
- Low lutein recovery
- Poor pigment stability
- High solvent consumption
- Manual production inconsistencies
- Long extraction cycles
- High operating costs
- Variable product purity
- Limited production capacity
- Difficulty meeting export specifications
Project Objectives
Mechotech developed a turnkey plant capable of:
- Processing 25 MT/day of Marigold Flowers
- Producing high-purity Lutein and Zeaxanthin
- Maximising carotenoid recovery
- Recovering extraction solvent for reuse
- Reducing steam and utility consumption
- Documentation to support the customer's quality and regulatory qualification
- Supporting future expansion
Raw Material
- Botanical Name
- Tagetes erecta
- Common Name
- Marigold Flower
- Plant Part Used
- Fresh or Dried Flower Petals
- Moisture Content
- 10–70% (depending on processing method)
- Daily Processing Capacity
- 25,000 kg/day
Finished Product
Available Options
Applications
- Eye Health Supplements
- Softgel Capsules
- Tablets
- Functional Foods
- Beverages
- Animal Feed Premixes
- Cosmetic Formulations
- Pharmaceutical Products
Process Flow
Process Description
Raw Material Preparation
Fresh or dried marigold petals are cleaned, dried (if required), and milled into a uniform particle size to maximise extraction efficiency.
Solvent Extraction
Prepared material is processed in stainless steel extraction vessels using food-grade solvents under controlled operating conditions.
The extraction process provides:
- High extraction efficiency
- Uniform batch quality
- Reduced solvent losses
Filtration
The extract is clarified using pressure filtration systems to remove insoluble plant material before concentration.
Vacuum Solvent Recovery
The filtered extract passes through vacuum evaporators where solvent is recovered, condensed, purified, and recycled.
Benefits include:
- Designed for efficient operation
- Improved environmental sustainability
- Enhanced process safety
- High product purity
Lutein Oleoresin Production
Following solvent recovery, concentrated lutein oleoresin is obtained as the primary intermediate product.
Saponification
Controlled alkaline hydrolysis converts lutein esters into free lutein while preserving carotenoid integrity.
Purification & Crystallisation
Advanced purification and crystallisation technologies produce highly purified lutein crystals with excellent stability and colour intensity.
Centrifugation & Vacuum Drying
Lutein crystals are separated, dried under vacuum, and milled into free-flowing powder suitable for downstream formulation.
Quality Standardisation
Finished products are analysed for:
- Lutein Content
- Zeaxanthin Content
- Total Carotenoids
- Residual Solvent
- Moisture
- Particle Size
- Colour Value
- Heavy Metals
- Microbial Limits
- Purity
Major Equipment Supplied
- Raw Material Cleaning System
- Dryer (Optional)
- Grinding Mill
- Stainless Steel Extraction Vessels
- Solvent Storage Tanks
- Pressure Leaf Filters
- Vacuum Evaporators
- Solvent Recovery System
- Saponification Reactors
- Crystallisers
- Centrifuges
- Vacuum Tray Dryer / Conical Vacuum Dryer
- Pulveriser
- Ribbon Blender
- Product Storage Tanks
- PLC-SCADA Automation Panel
- Electrical MCC
- Instrumentation Package
- CIP System
Automation Features
The plant incorporates intelligent automation including:
- Automatic Recipe Management
- Extraction Sequence Control
- Temperature Monitoring
- Solvent Flow Monitoring
- Vacuum Control
- Reactor Control
- Crystallisation Monitoring
- Batch Traceability
- Alarm Management
- Production Analytics
- Utility Monitoring
- Remote Diagnostics
- Industry 4.0 Connectivity
GMP & Safety Features
The plant is designed with hygienic, GMP-oriented practice in view; the standards that apply to the client's facility and product are scoped per project. Features include:
- SS 316L product-contact surfaces
- Hygienic sanitary piping
- Closed-loop solvent handling
- Explosion-proof electrical systems
- Nitrogen blanketing
- Food-grade seals and gaskets
- CIP-compatible construction
- Validation-ready equipment
- GMP-oriented layout
- HACCP-oriented process design
Plant Utilities
- Steam Boiler
- Cooling Tower
- Chilled Water System
- Vacuum System
- Air Compressor
- Soft Water System
- Electrical Power
- Nitrogen Supply
Sustainability Features
The plant incorporates environmentally responsible engineering through:
- Closed-loop solvent recovery
- Heat recovery systems
- Water conservation
- Optimised steam utilisation
- Energy-efficient vacuum systems
- Reduced emissions
- Automated utility optimisation
- Eco-friendly process engineering
Customer Benefits
Following successful commissioning, the customer achieved:
- Higher lutein recovery
- Improved zeaxanthin yield
- Closed-loop solvent recovery
- Reduced production costs
- Lower utility consumption
- Increased production capacity
- Documentation to support regulatory qualification
Plants Used In This Project
Why Mechotech?
Mechotech is a manufacturer of turnkey extraction plants for nutraceuticals, herbal extracts, natural colours, pharmaceuticals, food ingredients, and specialty botanical products. With engineering excellence, our advanced extraction technology, solvent recovery systems, purification expertise, and PLC-SCADA automation enable customers worldwide to manufacture premium nutraceutical ingredients.
Conclusion
The Marigold Lutein Extraction Plant from Mechotech provides a complete turnkey solution for producing premium Lutein, Zeaxanthin, and natural carotenoid extracts. By integrating advanced solvent extraction, precision purification, intelligent automation, and hygienic GMP engineering, the facility combines these process stages in a single turnkey solution.
Key Technical Highlights
- Raw Material
- Tagetes erecta (Marigold Flower)
- Finished Products
- Lutein Oleoresin, Free Lutein, Zeaxanthin, Natural Carotenoid Extracts
- Technology
- Solvent Extraction + Saponification + Crystallisation + Vacuum Solvent Recovery
- Solvent Recovery
- Established during process development
- Automation
- PLC-SCADA with Industry 4.0 Integration
- Construction Material
- SS 304 / SS 316L
- Compliance
- Hygienic, GMP-oriented design with documentation to support the client's qualification; applicable standards are scoped per project
- Applications
- Nutraceuticals, Pharmaceuticals, Functional Foods, Animal Nutrition, Cosmetics
Why Global Manufacturers Choose Mechotech
- engineering expertise in botanical extraction technologies
- Complete turnkey execution from laboratory validation to commercial production
- Customised plants from 100 kg/day pilot systems to industrial facilities
- High-efficiency solvent extraction
- Advanced purification and crystallisation technology
- Intelligent PLC-SCADA automation with full batch traceability
- Hygienic, GMP-oriented design with documentation to support the client's qualification; applicable standards are scoped per project
- Complete installation, validation, operator training, annual maintenance support, spare parts supply, and lifetime technical assistance
- Extensive expertise in nutraceuticals, herbal extracts, natural colours, oleoresins, essential oils, pharmaceuticals, and food processing plants
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