Transalkylation Catalysts for Toluene Disproportionation in Toluene-Rich Feeds
TransMax™ 300 Series
Änderungsdatum :
Februar 06, 2026
In toluene disproportionation, two moles of toluene are converted into one mole of benzene and one mole of xylenes. Paraxylene (PX) obtained via this equilibrium-limited reaction can provide a significant feedstock advantage for producers. TransMax™ 300 transalkylation catalysts have demonstrated excellent performance and operating flexibility for toluene disproportionation over many years.
The latest generation is based on an advanced zeolite formulation which allows for higher xylene and benzene yields at even better product selectivities. It also enables the transalkylation catalyst to tolerate considerable amounts of heavy aromatics as co-feed to toluene. The metal function prevents coking, and enables operation at very low hydrogen-to-oil ratios if necessary. This makes the TransMax 300 series ideal for inexpensive debottlenecking of existing toluene disproportionation (TDP) facilities, with the added flexibility of heavier feed compositions.
For feeds with significant amounts of C9+ aromatics, we also offer the TransMax™ 500 catalyst series.
Product Information
Benefits
- Low start-up temperature and low deactivation ensures wide operating window and long cycles
- Short time to on-spec. benzene after start-up
- High selectivity to benzene and xylenes due to optimal zeolite structure and tailored catalyst acidity
- Great feed flexibility allows for large amounts of heavy aromatics
- High purity product eliminates the need for downstream treating: no aromatics extraction, no clay treating necessary
- High tolerance to feed impurities
- Wide operating window in terms of SV, P and T
- Metal loading curbs coking and catalyst deactivation
| Product composition | Non-noble metal promoter; Proprietary zeolite |
| Size | 1.6 mm |
| Shape | Extrusions |
