TransPlus process

Transplus A transalkylation process for making mixed xylenes from heavy aromatics and toluene. Developed by Mobil Technology and Chinese Petroleum Corporation. 

The catalyst used in the TransPlus process jointly developed by ExxonMobil and CPC uses a proprietary zeolite [76]. From the literature, the SK Energy ATA-11 catalyst appears to be based on either mordenite or beta zeolite using attenuated noble metals. The UOP TAC9 process was developed by UOP and Toray and is licensed by UOP (outside Japan and Korea). The UOP Tatoray process is based on a bi-functional catalyst with long catalyst life, minimal ring loss and hydrogen consumption in comparison with noble metal catalyst systems. 

Application To convert C9+ heavy aromatics, alone or in conjunction with toluene or benzene co-feed, primarily to mixed xylenes using ExxonMobil Chemical s TransPlus process. 

The ability of TransPlus to process feeds rich in C9+ aromatics enhances the product slate toward xylenes. Owing to its unique catalyst, long cycle lengths are possible. 

Description Aromatics are produced from naphtha in the Aromizing section (1), and separated by conventional distillation. The xylene fraction is sent to the Eluxyl unit (2), which produces 99.9% paraxylene via simulated countercurrent adsorption. The PX-depleted raffinate is isomerized back to equilibrium in the isomerization section (3) with either EB dealkylation-type (XyMax) processes or EB isomerization-type (Oparis) catalysts. High-purity benzene and toluene are separated from non-aromatic compounds with extractive distillation (Morphylane ) processes (4). Toluene and C9 to Cn aromatics are converted to more valued benzene and mixed xylenes in the TransPlus process (5), leading to incremental paraxylene production. 

TransPlus A transalkylation process for making mixed xylenes from heavy aromatics and toluene. Developed by Mobil Technology and Chinese Petroleum Corporation and first operated in Taiwan in 1997. Three units were operating in 2005. It is now offered by Axens. 

Axens/ExxonMobil Xylene Toluene and Cg+ aromatics In the TransPlus process, the feed is a mixture of fresh and recycled toluene together with fresh and recycled Cg+ aromatics. The mixed feed is combined with hydrogen-rich recycle gas, preheated and passed through the reactor where transalkylation reactions take place. 16 2009... 

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