Alkylaromatics production
US7790939B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 2, 2009 |
| Grant date | Sep 7, 2010 |
| Priority date | — |
| Expiry date | Dec 2, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G2400/30
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for alkylation or transalkylation of an alkylatable aromatic compound having reactive impurities with an alkylating agent to produce a monoalkylated aromatic compound, comprising the steps of contacting at least a portion of said alkylatable aromatic compounds and said alkylating agent with a first molecular sieve catalyst in a guard bed under suitable conditions to remove said reactive impurities and form a first effluent comprising monoalkylated aromatic compound, unreacted alkylatable aromatic compounds and unreacted alkylating agent; contacting said first effluent with a second molecular sieve catalyst different from said first molecular sieve catalyst in said reaction zone under suitable alkylation or transalkylation conditions to produce additional said monoalkylated aromatic compounds; and maintaining said water content from about 1 wppm to about 10 wt. % based on the combined weight of said alkylatable aromatic compound and said alkylating agent in said reaction zone for the majority of the on-oil time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.