Process for Converting Aromatic Hydrocarbons Using Passivated Reactor
AssigneeExxonMobil Chemical Patents Inc.
InventorsSeth M. Washburn, Hsu Chiang, Umar Aslam, Wenyih Frank Lai, Doron Levin, Tan-Jen Chen
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Abstract
This disclosure provides improved processes for converting aromatic hydrocarbons, such as benzene/toluene, alkylation, transalkylation, or isomerization. In an embodiment, a process comprises utilizing a passivated reactor to reduce deactivation of a molecular sieve catalyst. Additional measures such as the use of an auxiliary catalyst and/or an elevated reactor pressure may be used to further reduce deactivation of the molecular sieve catalyst.
Claims25
A process for converting aromatic hydrocarbons, the process comprising:
- (I) providing a passivated reactor;
- (II) providing a conversion catalyst system in the passivated reactor, the conversion catalyst system comprising a molecular sieve catalyst;
- (III) feeding a feed comprising aromatic hydrocarbons into the passivated reactor;
- and
- (IV) contacting the feed with the conversion catalyst system under conversion conditions to produce a conversion product mixture effluent.
A process for converting benzene and/or toluene, the process comprising:
- (I) providing a passivated reactor;
- (II) providing a fixed bed of a methylation catalyst system in the passivated reactor, the methylation catalyst comprises a zeolite;
- (III) feeding a feed comprising an aromatic hydrocarbon and a methylating agent into the passivated methylation reactor, wherein the aromatic hydrocarbon is benzene and/or toluene, and the methylating agent is methanol and/or dimethyl ether;
- and
- (IV) contacting the feed with a methylation catalyst system comprising a zeolite under conversion conditions effective to produce a conversion product mixture effluent exiting the methylation reactor, wherein the conversion conditions comprise a temperature ranging from 200 to 500° C., and the conversion product mixture effluent comprising methanol, dimethyl ether, and xylenes.
Dependencies are inferred from the claim text.