Council of Scientific and Industrial Research

Mutyala Sateesh

Boyapati Manoranjan Choudary

Mannepalli Lakshmi Kantam

Kondapuram Vijaya Raghavan

Kottapalli Koteswara Rao

Kondapuram Vijaya Raghaven

Kalluri Venkata Sri Ranganath

Billakanti Veda Prakash

Kompella Vishweshwar Prasad

Kulluri Venkata Sri Ranganath

The present invention relates to a process for the preparation of 4&prime;-isobutylacetophenone from isobutylbenzene which comprises reactions isobutyl benzene with acetic anhydride as an acylating agent in the presence of a zeolite beta catalyst at a temperature ranges between 60 to 165&deg; C. for 2-12 h separating the catalyst by filtration from the reaction mixture and recovering the product by a conventional method.

Process for the preparation of 4&prime;-isobutylacetophenone

The present invention relates to a process for the production of nitro line aromatic compounds from aromatic hydrocarbons using modified clay catalysts. This invention particularly relates to a process for nitration of aromatic hydrocarbons using modified clay catalysts without using H SO . The process for the preparation of nitro compounds from aromatic hydrocarbons using modified clay catalysts comprises nitrating aromatic hydrocarbons using fuming nitric acid in the molar ratio of nitric acid to aromatic hydrocarbon 0.3:1 to 1.2:1 in the presence of metal exchanged clay catalyst at 25&deg; C. to 155&deg; C. for 0.25 to 2.0 hours and recovering the corresponding nitro compounds.

Process for the production of nitroaromatic compounds from aromatic hydrocarbons using modified clay catalysts

An improved process for the preparation of acyl naphthyl ethers useful as important intermediates for drugs, pharmaceuticals and polyesters by reacting a naphthyl ether with a C2-C5 acid anhydride as an acylating agent employing a zeolite beta catalyst is disclosed.

Process for acylation of naphthyl ethers

An improved process for the preparation of acyl aromatic ethers useful as important intermediates for drugs and pharmaceuticals by reacting an aromatic ether with an acylating agent selected from a C2-C8 acid anhydrides, employing nano- and microcrystalline zeolite beta as catalyst is disclosed.

Process for the preparation of acyl aromatic ethers

The present invention relates to a process for the preparation of the acyl heteroaromatic compounds useful as important intermediates for drugs, pharmaceuticals and flavouring agents, said process comprising reacting an heteroaromatic compound selected from furan, thiophene and pyrrole with a C2-C5 acid anhydride as an acylating agent employing metal ion exchanged clays as catalysts at temperatures in the range of 0-130&deg; C. for a period of 1-24 h, and separating the acyl heteroaromatic compound by a conventional method to obtain a product of high purity.

Process for the preparation of acyl heteroaromatic compounds from heteroaromatic compounds by metal ion exchanged clays

The present invention relates to a process for the production of nitroarenes with high para-selectivity from monosubstituted aromatic hydrocarbons using aluminosilicates as catalysts, which comprises nitration of monosubstituted aromatic hydrocarbons using aluminosilicates of different ratios wherein Si/Al ranges between 5 to 1000 and the said aluminosilicates being manifested in the form of variety of zeolites and K10 montmorillonite as catalysts using nitric acid in the molar ratio of nitric acid to monosubstituted aromatic hydrocarbons ranging between 0.25 to 2.5 at a temperature in the range of 30-160.degree. C. for a period ranging between 0.25 to 3.0 h and followed by continuous removal of water formed from the reaction mixture with a Dean-Stark apparatus and recovery of the product mixture by concentration of the reaction mixture after separation of the catalyst by filtration.

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Hyderabad Telangana, India

Mutyala Sateesh