Aromatic alkylation process
US8558046B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 28, 2009 |
| Grant date | Oct 15, 2013 |
| Priority date | — |
| Expiry date | Aug 27, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/52
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention is for a process for the alkylation of aromatic compounds, with a shape-selective zeolite catalyst. The process has reactors in series with C8+ aromatics being separated from the product stream effluents from each reactor before passing the reactor effluent to the next reactor with an additional input of methanol. The C8+ aromatics are separated into para-xylene and other C8+ aromatics. This process is applicable for toluene methylation having a molar excess of toluene:methanol. i.e., greater than 1:1, with a shape-selective catalyst of an aluminosilicate zeolite, such as ZSM-5 which has been modified with phosphorus, to produce para-xylene (p-xylene).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.