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EP0173335A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Method for producing aromatic hydrocarbons

Assignee: Eneos Corp
•
Filing: 1985-08-29
•
Granted: —
•
Expires: 2005-08-29
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Abstract

Abstract A method for producing an aromatic hydrocarbon easily and safely without the use of carrier-supported catalyst and is characterized in that an unsaturated compound having a double bond or bonds that are conjugated with the benzene ring is allowed to coexist in the process to alkylate a substituted aromatic hydrocarbon with olefins in the presence of 5 mM or more of metallic sodium and potassium compound to provide 3 mM or more of potassium ions relative to 1 mole of the substituted aromatic hydrocarbon, said substituted aromatic hydrocarbon having at least one alkyl group or alkylene group which has at least one hydrogen atom in the a-position relative to the aromatic ring of said substituted aromatic hydrocarbon.

Inventors

  • 👤 Isoo Shimizu
  • 👤 Hideki Nomura
  • 👤 Kazumichi Uchida
  • 👤 Hitoshi Mitsuyuki

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-05 12:15
CPC Classifications
C; C07; C07C; C07C15/00; C07C15/02; C07C2/00; C07C2/54; C07C2/72; C07C2523/00; C07C2523/02; C07C2523/04; C07C2527/00; C07C2527/20; C07C2527/232

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 144 words
A method for producing an aromatic hydrocarbon which is characterized in that an unsaturated compound having a double bond or bonds that are conjugated with the benzene ring of said unsaturated compound is allowed to coexist in the process to alkylate a substituted aromatic hydrocarbon with ethylene and/or propylene in the presence of 5 mM (millimoles) or more of metallic sodium relative to 1 mole of said substituted aromatic hydrocarbons and at least one member selected from the group consisting of potassium carbonate, potassium hydrogen carbonate and potassium hydroxide which is sufficient to provide 3 mM or more of potassium ions also relative to 1 mole of said substituted aromatic hydrocarbon, said substituted aromatic hydrocarbon having at least one alkyl group or alkylene group which has at least one hydrogen atom in the a-position relative to the aromatic ring of said substituted aromatic hydrocarbon.
Claim 2
Independent Claim 144 words
A method for producing an aromatic hydrocarbon which is characterized in that an unsaturated compound having a double bond or bonds that are conjugated with the benzene ring of said unsaturated compound is allowed to coexist in the process to alkylate a substituted aromatic hydrocarbon with ethylene and/or propylene in the presence of 5 mM (millimoles) or more of metallic sodium relative to 1 mole of said substituted aromatic hydrocarbons and at least one member selected from the group consisting of potassium carbonate, potassium hydrogen carbonate and potassium hydroxide which is sufficient to provide 3 mM or more of potassium ions also relative to 1 mole of said substituted aromatic hydrocarbon, said substituted aromatic hydrocarbon having at least one alkyl group or alkylene group which has at least one hydrogen atom in the a-position relative to the aromatic ring of said substituted aromatic hydrocarbon.
Claim 3
Dependent Claim 28 words
The method in Claim 1, wherein said unsaturated compound is at least one member selected from the group consisting of styrene, a-methylstyrene, P-methylstyrene, vinyltoluene, indene, alkylindene and divinylbenzene.
Claim 4
Dependent Claim 29 words
The method in Claim 1 or 2, wherein the quantity of said unsaturated compound is in the range of 0.5 to 15% by mole relative to said metallic sodium.
Claim 5
Dependent Claim 30 words
The method in Claim 1, wherein the substituted aromatic hydrocarbon is at least one member selected from the group consisting of toluene, ethylbenzene, isopropylbenzene, sec-butylbenzene, xylene, cymene, 1,1-dimethylindane and a-methylnaphthalene.

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