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US 5,672,799 AGranted
Process for the preparation of cumene
AssigneesEniricerche S.p.A., Enichem Synthesis S.p.A.
InventorsCarlo Perego, Giannino Pazzuconi, Gianni Girotti, Giuseppe Terzoni
Life of this patent
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Abstract
Process for the preparation of cumene by the alkylation of benzene with propylene, catalyzed by zeolite Beta into which certain quantities of suitable alkaline, alkaline-earth or metallic cations have been introduced by ion exchange.
Claims7
A process for the preparation of cumene comprising the steps of:
- reacting benzene and propylene in the presence of a zeolite Beta catalyst having the formula:
- (x/n)M.(1.0-x) H.sup.+ .cndot.AlO.sub.2 .cndot.y SiO.sub.2 .cndot.w H.sub.2 O
- wherein y is from 5 to 100, w is less than or equal to 4, M=Na.sup.+, K.sup.+, Ca.sup.2+ or Ni.sup.2+ and x has a value of from 0.25 to 0.50;
- carrying out said reaction at a temperature of from 150.degree. to 300.degree. C., a pressure of from 10 to 50 atm and a total WHSV feeding rate of reagents of from 0.1 to 200 hrs.sup.-1.
1 more element
Dependencies are inferred from the claim text.