Back to results
US 4,731,497 AGranted
Alkylation of aromatics with alpha-olefins
AssigneeAtlantic Richfield Company
InventorRoger A. Grey
Life of this patent
Estimating the term…
Abstract
H-mordenite has been shown to be unique in its ability to yield a high percentage of para-substitution of monoalkyl benzene by alkylation with long chain alpha-olefins. The process also yields a high percentage of substitution of the alpha-olefin in the 2-carbon position. Minimal side effects, such as dialkylation and transalkylation, are also advantages of the process.
Claims6
A process for the alkylation of monoalkyl-monosubstituted benzenes with long-chain alpha olefins comprising:
- contacting, at a temperature of from 20.degree. to 260.degree. C., a monalkyl monosubstituted benzene with an alpha-olefin containing from about 10 to about 20 carbon atoms in the presence of a catalyst comprising the acid form of a three-dimensional crystalline zeolite molecular sieve having pore size of between 6.7 and 7.5.ANG. and having a silica:alumina weight ratio of between about 30:1 and 2:1;
- said benzene and alpha-olefin being in mole ratio of between about 10:1 and 3:1 and said olefin to catalyst mole ratio being from about 20:1 to 2:1;
- whereby the alkylated benzene is alkylated to at least about 80% in the paraposition and the benzene ring is attached at least about 70% at position 2 of the alpha-olefin.
Dependencies are inferred from the claim text.