Executive Summary
A botanical extract manufacturer sought a high-capacity, GMP-oriented extraction facility to produce Grape Seed Extract standardised to 95% Oligomeric Proanthocyanidins (OPC) for global nutraceutical, pharmaceutical, cosmetic, and functional food markets.
The customer required a turnkey solution capable of maximising OPC recovery, preserving antioxidant activity, reducing solvent consumption, and ensuring consistent export-grade quality while managing operating costs.
Mechotech engineered, manufactured, installed, and commissioned a Grape Seed OPC Extraction Plant featuring advanced hydro-alcoholic extraction, membrane clarification, purification, vacuum concentration, solvent recovery, spray drying, and PLC-SCADA automation.
Customer Background
The customer is an international supplier of botanical ingredients serving dietary supplement manufacturers, pharmaceutical companies, functional beverage producers, and cosmetic formulators across Europe, North America, Asia, and the Middle East. With increasing demand for natural antioxidants, the company required a modern extraction facility capable of producing pharmaceutical-grade OPC extract while meeting stringent international quality standards.
Customer Challenges
Prior to implementing the new facility, the customer faced:
- Low OPC extraction efficiency
- Oxidation during processing
- High solvent consumption
- Poor recovery of active compounds
- Variable batch quality
- Long production cycles
- High energy consumption
- Manual process control
- Difficulty complying with export specifications
Project Objectives
The project was designed to:
- Process 10 MT/day of Grape Seeds
- Produce 95% OPC standardised extract
- Preserve antioxidant activity
- Closed-loop solvent recovery
- Reduce utility consumption
- Improve batch consistency
- Fully automate production
- Meet GMP and international regulatory requirements
Raw Material
- Botanical Name
- Vitis vinifera
- Common Name
- Grape Seed
- Plant Part Used
- Seeds
- Moisture Content
- 5–8%
- Daily Processing Capacity
- 10,000 kg/day
Finished Product
Available Options
Applications
- Nutraceutical Capsules
- Functional Foods
- Pharmaceutical Formulations
- Anti-ageing Products
- Cosmetic Ingredients
- Sports Nutrition
Process Flow
Process Description
Raw Material Preparation
Grape seeds are thoroughly cleaned to remove foreign matter before being milled to an optimised particle size for efficient extraction.
Hydro-Alcoholic Extraction
Prepared seeds are transferred into stainless steel extraction vessels where food-grade ethanol and purified water are circulated under controlled operating conditions.
The extraction process ensures:
- Preservation of antioxidant compounds
- Reduced oxidation
- Uniform extraction
- Improved productivity
Primary Filtration
The extract is clarified using pressure filtration systems to remove suspended solids while preserving valuable polyphenols.
Membrane Clarification
Cross-flow membrane filtration removes fine particles and colloidal impurities without affecting antioxidant compounds.
Benefits include:
- Reduced downstream load
- Improved colour stability
- Enhanced final purity
Vacuum Concentration
Clarified extract enters a multi-effect vacuum evaporator where solvent is gently removed under reduced pressure.
Advantages include:
- Protection of heat-sensitive OPC
- Lower steam consumption
- Improved product stability
- High concentration efficiency
Purification
The concentrated extract undergoes purification to enrich OPC while reducing sugars, pigments, and unwanted plant constituents.
Solvent Recovery
Mechotech's advanced solvent recovery system supports ethanol recovery, significantly lowering solvent costs and minimising environmental impact.
Recovered solvent is:
- Condensed
- Purified
- Stored
- Reused in subsequent extraction cycles
Spray Drying
The concentrated extract is converted into a fine, free-flowing powder using controlled spray drying technology.
The finished product offers:
- Uniform particle size
- Low moisture content
- High antioxidant stability
- Extended shelf life
Blending & Standardisation
Final blending ensures consistent OPC concentration and compliance with customer specifications before packaging.
Major Equipment Supplied
- Raw Material Cleaning System
- Hammer Mill
- Stainless Steel Extraction Vessels
- Solvent Storage Tanks
- Transfer Pumps
- Pressure Leaf Filters
- Membrane Filtration System
- Vacuum Evaporator
- Purification Columns
- Solvent Recovery Unit
- Condensers
- Spray Dryer
- Ribbon Blender
- Storage Tanks
- CIP System
- PLC-SCADA Automation Panel
- Electrical MCC
- Instrumentation Package
Automation Features
The plant incorporates advanced automation for:
- Recipe-based batch management
- Automatic extraction sequencing
- Temperature and pressure control
- Solvent flow monitoring
- Vacuum control
- Membrane pressure monitoring
- Alarm management
- Historical batch records
- Production analytics
- Utility monitoring
- Remote diagnostics
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 piping systems
- Sanitary valves
- Closed solvent handling
- Nitrogen blanketing
- Flameproof motors
- Explosion-proof electrical equipment
- Pressure safety devices
- Emergency shutdown systems
- CIP-ready hygienic design
Plant Utilities
- Steam Boiler
- Cooling Tower
- Chilled Water System
- Vacuum System
- Air Compressor
- Electrical Power
- Soft Water System
- Nitrogen Supply
Sustainability Features
The facility incorporates sustainable engineering principles including:
- Closed-loop solvent recovery
- Heat recovery integration
- Water conservation systems
- Low-emission process design
- Energy-efficient vacuum evaporation
- Reduced wastewater generation
- Optimised steam utilisation
- Eco-friendly manufacturing practices
Customer Benefits
Following commissioning, the customer achieved:
- Higher OPC recovery and purity
- Improved antioxidant retention
- Closed-loop solvent recovery
- Lower production costs
- Reduced utility consumption
- Increased export acceptance
- Enhanced operator safety
- Higher production capacity
- Improved return on investment
Plants Used In This Project
Why Mechotech?
Mechotech is a manufacturer of turnkey extraction and processing plants for nutraceutical, pharmaceutical, food, botanical, and specialty chemical industries. With expertise in advanced solvent extraction, membrane filtration, purification, drying, automation, and GMP-oriented engineering, we deliver customised, energy-efficient solutions that enable manufacturers to produce botanical extracts.
Conclusion
The Grape Seed OPC Extraction Plant from Mechotech combines advanced extraction technology, precision purification, intelligent automation, and sustainable process engineering to deliver premium-quality antioxidant extracts for global markets.
Key Technical Highlights
- Raw Material
- Vitis vinifera (Grape Seeds)
- Finished Product
- 50%, 70%, 95% OPC Grape Seed Extract
- Solvent Recovery
- Established during process development
- Automation
- PLC-SCADA with recipe management
- 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, Cosmetics, Dietary Supplements
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