In organic chemistry, xylene or xylol (from Greek ξύλον (xylon) 'wood'; [1][2] IUPAC name: dimethylbenzene) are any of three organic compounds with the formula (CH3)2C6H4.

LPI process technology is the latest generation of liquid phase isomerization technology offering significant energy savings and ultra-low xylene losses. PxMax offers improved yields, excellent stability, ease of operation and extremely long catalyst cycles.

2013年1月1日 · A new process patented by Breen et al. makes use of an oxide-modified ZSM-5 catalyst and short catalyst contact times to achieve a 99.9% para-xylene selectivity.

2018年6月11日 · The MX Sorbex process recovers meta-xylene (m-xylene) from mixed xylenes. UOP’s innovative Sorbex technology uses adsorptive separation for highly efficient and selective recovery, at high purity, of molecular species that cannot be …

2021年12月1日 · Xylene isomerization aims to increase p-xylene production. The isomerization process can be divided into two categories according to how the EB is handed, i.e., EB dealkylation or EB isomerization. The process diagrams of both processes are quite similar, and the critical difference lies in the adopted catalysts.

2018年6月19日 · The Isomar process re-establishes an equilibrium distribution of xylene isomers, essentially creating additional paraxylene from the remaining ortho- and meta-xylenes. The feed typically contains less than 1 wt% of paraxylene and is first combined with hydrogen-rich recycle gas and makeup gas.

2013年8月12日 · There has been some success in enhancing p -xylene selectivity by modifying the ZSM-5 catalyst. This results in reduced separation cost, which makes toluene methylation a competitive process for p -xylene production.

2024年12月6日 · How is Xylene Produced? Catalytic Reforming of Naphtha: This process involves the cracking of naphtha, a fraction of crude oil, to produce xylene isomers. The feedstock is selectively hydrocracked and introduced into a transalkylation zone with a hydrocarbonaceous stream rich in benzene, toluene, and C9+ hydrocarbons.

2018年6月19日 · GT-IsomPX is GTC’s xylene isomerization technology available in two versions: ethylbenzene (EB) isomerization and EB dealkylation. Both versions gain high ethylbenzene conversion rates while producing equilibrium mixed xylenes—meta-xylene (MX), ortho-xylene (OX) and paraxylene (PX).

2021年12月30日 · In this study, a novel short process was proposed based on PX selectivity intensification of toluene methylation to minimize the high-energy consumption separation process of xylene isomers.