Process technology for Phthalic Anhydride
Improved plant design based on our own production experience.
Technobell technology used to produce phthalic anhydride (PAH) is based on the selective oxidation of o-xylene.
A multi-purpose ingredient.
Phthalic anhydride is a white crystalline solid, an intermediate product for which the largest markets are the production of phthalate plasticizers, unsaturated polyester resins and alkyd resins for surface coatings. The majority of worldwide phthalic anhydrite consumption is in its molten form.
Technobell’s state-of-the-art Phthalic Anhydride Process Technology
100% customised process
Flexible process design based on specified:
- raw material
- utilities
- infrastructure
- local standards and regulations
- local ambient conditions
100% customised process
Battery limits provided according to customer demands:
- complete stand-alone plant
- part of petrochemical / refinery complex
Complete solutions
Delivering more than process design:
- Technobell is a licensor for both license and equipment
- Technical and commercial services
- Material buy-back option
Guaranteed market leading performance
State-of-the art technology with the highest:
- o-xylene conversion
- o-xylene concentration
- reaction / cumulative PAH yield
- efficiency of switch condensers
- continuous PAH distillation
- Advanced process equipment
- Premium final product quality
Energy efficiency and sustainability
- Minimised utility consumption
- Plant is designed to export generated surplus energy either in the form of electricity or steam, whichever suits the client's needs
- Self-sufficient process
- No need for electricity and steam import
- Highest incinerator burner efficiency
- Integrated heat recovery system
Safe & smooth operation
- Fully continuous process integrated with the most advanced control system
- Highest level of HSE risk management according to strict HSE regulation
- Technology for completely safe o-xylene vaporization and perfect distribution in air
- Process designed to prolong the catalyst life-cycle
- Reactor ready to operate with all commercially available PAH catalysts
Advanced emission management system
- All liquid effluents are collected and treated ISBL
- No organic material emission
- Minimised greenhouse effect
Do you want to know more about our petrochemical technology solutions?
Check our brochures or get a free consultation to find you the best fit for your needs.
Final product Quality
| Unit | Expected | Guaranteed | |
| Color in molten form | Hazen | 5 | max. 10 |
| Colour stability in molten form | Hazen | 30 | max. 40 |
| Melting point | Celsius | 131.5 | min. 131.3 |
| Purity in molten form | % | 99.9 | min. 99.8 |
Color in molten form
Unit
Hazen
Expected
5
Guaranteed
max. 10
Colour stability in molten form
Unit
Hazen
Expected
30
Guaranteed
max. 40
Melting point
Unit
Celsius
Expected
131.5
Guaranteed
min. 131.3
Purity in molten form
Unit
%
Expected
99.9
Guaranteed
min. 99.8
*tested 1.5 hour at 150°C
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