Redish Purple Colour
Redish Purple Colour
Mechotech designs and manufactures turnkey natural colour extraction plants for the redish purple colour group. In the Mechotech catalogue (spelled as in the product tree) this group lists Plant - Red Basil and Flowers - Dark Red Hibiscus / Day Lillis. The catalogue treats redish purple colour as a group page rather than a single plant: the member pages describe the individual raw materials. Mechotech’s articles describe both members as anthocyanin sources: red basil leaves and stems, and the petals of dark red hibiscus (the article names Hibiscus sabdariffa and ornamental Hibiscus species) and day lilies (Hemerocallis).
Mechotech’s redish purple colour plant is configured around the raw material chosen from the group and the target colour extract. It is built in SS 316L with integrated solvent recovery, automation and full documentation, and is delivered as a commissioned turnkey system. The articles describe water and mildly acidic or alcoholic solvent extraction kept on the acidic side, gentle filtration and vacuum concentration, and antioxidant and drying options to stabilise the anthocyanins. The raw material, solvent, pH and temperature are selected during process development and pilot validation.
Technical Specifications
| Product | Redish Purple Colour Natural Colour Extraction Plant |
|---|---|
| Raw Material | Selected from the group: Plant - Red Basil; Flowers - Dark Red Hibiscus / Day Lillis |
| Plant Part / Feed Form | Varies by raw material; confirmed with the client for the chosen material |
| Colour Group | Redish Purple Colour |
| Extract Type | Natural colour extract (liquid concentrate or dried powder, per specification) |
| Extraction Method | Closed jacketed SS 316L extraction at controlled temperature with heated water, or mildly acidic or alcoholic solvents, kept mildly acidic for anthocyanin stability (the routes the articles describe); route confirmed during process development |
| Product-contact Material | SS 316L |
| Filtration System | Plate-and-frame filter press with cartridge polish filters |
| Concentration System | Falling-film / vacuum evaporator with solvent recovery where a solvent is used |
| Drying System | Spray or vacuum dryer, where a powder is required |
| Automation | PLC-based |
| Plant Capacity | Configured to requirement |
| Utility Requirements | Steam, chilled/cooling water, compressed air and power (project-specific) |
| Compliance | GMP hygienic design; full documentation for qualification |
| Final Product Form | Natural colour extract (redish purple colour group) |
Plant Capacities
| Plant Scale | Raw Material Throughput | Typical Use |
|---|---|---|
| Pilot | Configured to your feedstock and trial plan | Product development, parameter validation |
| Semi-Commercial | Configured between pilot and commercial scale | Scale-up trials, contract manufacturing |
| Commercial | Configured to raw-material supply and confirmed buyer volume | Commercial production |
Capacity is configured to raw-material supply, confirmed buyer volume and investment timeline; a pilot plant is recommended to validate parameters before scaling.
Manufacturing Process
Raw Material Preparation
The raw material chosen from the group is authenticated, washed, tested for moisture and chopped or crushed so the anthocyanins diffuse readily into the solvent; the articles stress harvesting at peak maturity or peak bloom, when pigment concentration is highest.
Extraction
The prepared material is extracted in closed jacketed SS 316L vessels at controlled temperature over several cycles, with gently heated water or with mildly acidic or alcoholic solvents. The articles keep the extraction mildly acidic to hold the pigment in its reddish-purple form; the route and conditions are set during process development.
Filtration
The extract is separated from the spent material and clarified through a plate-and-frame filter press followed by cartridge polish filters.
Concentration & Solvent Recovery
The extract is concentrated gently in a falling-film / vacuum evaporator at moderate temperature with the pH held on the acidic side; solvent is recovered through the condenser return system where a solvent is used.
Standardisation
The concentrate is assayed and adjusted to the declared target colour specification, such as shade and colour strength. The articles describe antioxidants such as ascorbic acid to improve stability and shelf life.
Drying & Quality Control
The standardised extract is supplied as a liquid concentrate or spray- or vacuum-dried to a powder, per specification, then released after assay, residual-solvent (where a solvent is used), heavy-metal, microbial and moisture testing.
Major Plant Equipment
- Raw material cleaning, authentication and moisture testing
- Size-reduction system
- Closed jacketed SS 316L extraction vessels
- Solvent storage tanks
- Plate-and-frame filter press
- Cartridge polish filtration
- Falling-film / vacuum evaporator
- Solvent recovery unit and condensers
- Standardisation / blending vessel
- Spray or vacuum dryer
- CIP system
- Automation and instrumentation
Plant Output
Applications
- Natural reddish-purple colour and dye ingredient supply
- Food and beverage colour applications (subject to approval of the specific colour in each market)
- Cosmetic and personal-care colour applications
- Textile colouring, where mordants fix the pigment (per the articles)
Key Features
SS 316L Construction
Electropolished SS 316L product-contact surfaces with CIP operation between batches.
Acid-Protected Extraction
The articles hold extraction, concentration and the final product on the acidic side, because near-neutral pH shifts the colour toward purple and alkaline pH toward unstable blue forms.
Gentle Concentration
Vacuum concentration at moderate temperature protects the heat- and light-sensitive anthocyanins.
Standardised to Specification
In-process and batch-release assay are used to check the finished extract against the agreed target specification, such as shade and colour strength.
Scalable Batch Capacity
Plants are configured to requirement from pilot scale upward, with modular expansion.
Frequently Asked Questions
Does Mechotech supply the complete machinery for Redish Purple Colour?
What specification can the Redish Purple Colour plant achieve?
What production capacities are available for the Redish Purple Colour plant?
Which industries use the Redish Purple Colour plant?
Which raw materials are in the Redish Purple Colour group?
What gives the group its reddish-purple colour?
Why is the extraction kept acidic?
How is the raw material chosen?
Which related colour pages does Mechotech list?
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