ExxonMobil’s PxMax℠ process is the industry benchmark Selective Toluene Disproportionation (STDP) process. The technology, based on the ex-situ selectivated EM-2300 catalyst, offers unmatched paraxylene selectivity and product yields, as well as exceptionally long and stable cycles. The PxMax℠ process is also licensed by our alliance partner, Axens, as part of the ParamaX® technology suite for grassroots aromatics complexes. ExxonMobil’s Dividing-Wall Column (DWC) technology is also available for licensing in combination with the PxMax℠ process.
Key Benefits:
Superior Process Performance
Ultra-high PX selectivity
Higher total xylene yields
Superior xylenes/benzene ratio
Benzene product with greater than 99.9% purity
Extremely Long Catalyst Cycles
No in-situ regeneration need (cycles > 15 years)
Performance improves over the catalyst cycle
Lower Process Costs
Reduced size of reactor and PX recovery unit
Lower metallurgy cost
Lower operating costs
Ultra-high paraxylene selectivity, superior yields, extremely long catalyst cycles
The EM-2300 catalyst is at the heart of the unique performance and superior yields of the PxMax℠ process. The catalyst is manufactured using a proprietary ex-situ selectivation technique which increases the relative diffusivity rate of paraxylene versus those of the larger isomers. As a result, the PxMax℠ process yields ultra-high paraxylene selectivity at SOC (> 96%). Paraxylene selectivity further increases as the cycle progresses making the PxMax℠ process by far the most paraxylene selective STDP process on the market.
ExxonMobil’s PxMax℠ process is the industry benchmark Selective Toluene Disproportionation (STDP) process. The technology, based on the ex-situ selectivated EM-2300 catalyst, offers unmatched paraxylene selectivity and product yields, as well as exceptionally long and stable cycles. The PxMax℠ process is also licensed by our alliance partner, Axens, as part of the ParamaX® technology suite for grassroots aromatics complexes. ExxonMobil’s Dividing-Wall Column (DWC) technology is also available for licensing in combination with the PxMax℠ process.
Key Benefits:
Superior Process Performance
- Ultra-high PX selectivity
- Higher total xylene yields
- Superior xylenes/benzene ratio
- Benzene product with greater than 99.9% purity
Extremely Long Catalyst Cycles
- No in-situ regeneration need (cycles > 15 years)
- Performance improves over the catalyst cycle
Lower Process Costs
- Reduced size of reactor and PX recovery unit
- Lower metallurgy cost
- Lower operating costs
Ultra-high paraxylene selectivity, superior yields, extremely long catalyst cycles
The EM-2300 catalyst is at the heart of the unique performance and superior yields of the PxMax℠ process. The catalyst is manufactured using a proprietary ex-situ selectivation technique which increases the relative diffusivity rate of paraxylene versus those of the larger isomers. As a result, the PxMax℠ process yields ultra-high paraxylene selectivity at SOC (> 96%). Paraxylene selectivity further increases as the cycle progresses making the PxMax℠ process by far the most paraxylene selective STDP process on the market.
