Disproportionation and transalkylation of heavy aromatic hydrocarbons
US10800718B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 10, 2017 |
| Grant date | Oct 13, 2020 |
| Priority date | — |
| Expiry date | Feb 10, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/52
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Disclosed herein is a process for producing para-xylene comprising the steps of: (a) contacting a feedstock comprising toluene with a first catalyst under effective vapor phase toluene disproportionation conditions to disproportionate said toluene and produce a first product comprising benzene, unreacted toluene and greater than equilibrium amounts of para-xylene; and (b) contacting a feedstock comprising C9+ aromatic hydrocarbons and benzene with a second catalyst in the presence of 0 wt. % or more of hydrogen having a 0 to 10 hydrogen/hydrocarbon molar ratio under effective C9+ transalkylation conditions to transalkylate said C9+ aromatic hydrocarbons and produce a second product comprising xylenes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.