Catalysed acylation of alkylated benzene derivatives

An ecofriendly process for acylation of an alkylated benzene derivative has increased selectively towards para position and comprises a step of reacting the alkylated benzene derivative with an acylating agent in the presence of nitrobenzene, dichlorobenze, dimethylsulfolane, and/or benzotrile, and a crystalline alumino silicate catalyst having general formula M2/nO.Al2O3xSiO2wH2O, wherein M is an alkali cation, a rare earth cation, and/or a proton, wherein the Si/Al ratio is in the range of 5.5 to 20, wherein the step of reacting is performed at temperature between to C. for 5 to 25 hours. In a further step, the solid catalyst is separated from the reaction mixture of step, and in yet another step, the acylated alkyl benzene derivative is separated from the mixture.

Patent Assignee: Council of Scientific & Industrial Research (CSIR)

Patent No: US7087791 [USA]

Application No: 10/678,902

Inventor(s): Jasra, Raksh Vir; Tyagi, Beena; Badheka, Yogiraj Mansukhlal

Issue Date: 08-08-2006

Filing Date: 10-02-2003

Licensing Option: Laboratory willing to jointly develop technology with industrial partner.

Implementing institute: CSIR-Central Salt & Marine Chemicals Research Institute [CSIR-CSMCRI]

Funding agency: Council of Scientific and Industrial Research (CSIR)

IPC Classification: C07C 45/00

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