C.sub.8 alkylaromatic hydrocarbon production using reversible flow reactive chromatography
US6008424A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 19, 1998 |
| Grant date | Dec 28, 1999 |
| Priority date | — |
| Expiry date | Oct 19, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/582
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the transalkylation of benzene, toluene and alkylaromatic hydrocarbons containing nine and ten carbon atoms form alkylaromatic hydrocarbons containing eight carbon atoms has been developed. The fixed bed reaction and adsorption zone contains a transalkylation catalyst and an adsorbent effective to selectively adsorb C.sub.9 and C.sub.10 alkylaromatic hydrocarbon reactants relative to the C.sub.8 alkylaromatic hydrocarbon products. Hydrogen and a desorbent are introduced to a first portion of the zone and an effluent containing at least one C.sub.8 alkylaromatic hydrocarbon product is withdrawn from a second portion of the zone. After a period of time, the desorbent is redirected to the second portion of the zone and concurrently the effluent containing at least one C.sub.8 alkylaromatic hydrocarbon product is withdrawn from the first portion of the zone. The alternation of introducing the desorbent to a first portion and then a second portion of the zone while concurrently withdrawing the effluent from the second portion and then the first portion of the zone is continued, thereby retaining the C.sub.9 and C.sub.10 alkylaromatic hydrocarbons within the zone until they…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.