Transalkylation process with recycle of C.sub.10 hydrocarbons
US4341914A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 22, 1980 |
| Grant date | Jul 27, 1982 |
| Priority date | — |
| Expiry date | Dec 22, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C5/2732
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A transalkylation process useful in producing C.sub.8 alkyl-aromatic hydrocarbons from C.sub.9 alkylaromatic hydrocarbons or a mixture of C.sub.7 and C.sub.9 alkylaromatic hydrocarbons. The effluent of a transalkylation zone is passed into a fractionation zone and is therein preferably separated into a light recycle stream comprising benzene and toluene and a heavy recycle stream comprising C.sub.9 and C.sub.10 alkylaromatic hydrocarbons, with both recycle streams being returned into the transalkylation zone. The recycling of C.sub.10 hydrocarbons to the transalkylation zone increases the yield of C.sub.8 alkylaromatic hydrocarbons from the transalkylation process. The transalkylation step is preferably integrated with a paraxylene separation zone and a xylene isomerization zone operated as a continuous loop receiving mixed xylenes from the transalkylation zone feed and effluent fractionation zones.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.