Council of Scientific and Industrial Research

Mohan Keraba Dongare

Shubhangi Bhalchandra Umbarkar

Ankush Venkatrao Biradar

Pratap Tukaram Patil

Kusum Madhukar Malshe

Atul Balasaheb Kulal

Pavan M More

Swati Laxmikantrao Pandhare

Sonali Balasaheb Khomane

Dhananjay Shahauraj Doke

Vaibhav Ravindrakumar Acham

Trupti Vyankatesh Kotbagi

Ashvini Ramesh Bhosale

Macchindra Gulabrao Chandgude

Shubhangi Bhalchandra Umbarker

Samadhan Tanaji Lomate

The present invention discloses a process for nitration of benzene. More particularly, the present invention discloses an efficient, environmental friendly process for the nitration of benzene using a modified solid acid catalyst.

Nitration of benzene

Disclosed is a cheap and efficient non noble metal based catalyst for the oxidation of diesel or hydrocarbons, its synthesis and its application for diesel oxidation at low temperature. The catalyst comprises a mixed oxide of manganese and cerium, or manganese, cerium and zirconium. The catalyst has improved water and sulphur tolerance.

Non noble metal based diesel oxidation catalyst

Disclosed herein is a simple process for functionalization/grafting of carbon microspheres obtained from bagasse with various active functional groups onto it and use of the same as catalyst for various organic reactions, having very high selectivity and conversion rate.

Synthesis of functionalized carbon microspheres and their catalyst activity in C&#x2014;O and C&#x2014;N bond formation reactions

The present invention relates to a simple one step oxidative dehydrogenation process for the synthesis of alkyl pyruvate with 100% selectivity towards alkyl pyruvate comprising reacting an alkyl lactate in the presence of catalyst at the temperature ranging from 25-100&#xb0; C. for the time period ranging from 5 to 40 hours in an organic solvent and hydrogen peroxide to afford alkyl pyruvate.

Oxidative dehydrogenation of lactate esters to pyruvate esters

The present invention discloses an improved process for the liquid phase nitration of aromatic compounds catalyzed by WO3 supported on mesoporous silica support, at low temperature, with high conversion and selectivity.

Liquid phase nitration of aromatics using solid acid catalyst

The present invention relates to a process for hydrogenation of olefinic or acetylenic bonds. Further, the present invention relates to a process for selective hydrogenation of olefinic or acetylenic bonds and/including triglycerides using modified metal supported on solid acidic metal oxide catalyst and the process for the preparation thereof. The present invention provides a process for hydrogenation of olefinic or acetylenic bonds using metal supported on solid acid metal oxide based catalyst, at moderate conditions. The present invention also relates to the preparation of metal supported on solid acid metal oxide based catalyst for hydrogenation reactions under mild conditions.

Process for hydrogenation of olefinic or acetylenic bonds

Disclosed herein is an improved process for the catalytic dehydration of lactic acid to acrylic acid. More particularly, the present invention discloses catalytic dehydration of lactic acid to acrylic acid with high selectivity and yield for acrylic acid using calcium phosphate (CP) catalyst with varying Ca/P ratio optionally modified with 5 wt % sodium.

Process for catalytic dehydration of lactic acid to acrylic acid

A process for the preparation of crystalline microporous titanium silicates using ethylsilicate-40 and titanium peroxide as silicon and titanium sources respectively is described. The process permits a significant decrease in the production cost of titanium silicate containing higher amount of titanium (Si/Ti=20) because of cheaper raw materials as well as reduction in the quantity of tetarpropylammonium hydroxide (TPAOH) template (SiO:TPAOH=1:0.06&#x2013;0.1) required for preparation. The material obtained by the present invention is useful as an active catalyst in the reactions such as oxidation of hydrocarbons, alcohols, sulphides, and thioethers.

Process for preparing microporous crystalline titanium silicate

The present invention relates to the process for vapor phase nitration of o-xylene using dilute nitric acid over H-beta zeolite. More particularly it relates to the selective formation of 4-nitro o-xylene by vapor phase nitration of 0-xylene using dilute nitric acid over commercially available H-beta catalyst. The continuous process of nitration of o-xylene comprises of a reaction carried out in a downflow reactor using o-xylene and dilute nitric acid with mole ratio of 2:1 to 1:2 and WHSV of 0.1-0.5 at 100-250&deg; C. at atmospheric pressure.

Process for the preparation of 4-nitro-o-xylene

Nitration of benzene is an important reaction for the production of nitro benzene, which is an important intermediate in chemical and pharmaceutical industries. Conventionally nitrobenzene is produced by liquid phase reactions employing mixed acids. A sulfuric acid/nitric acid mixture is the most commonly used nitrating agent. Generation of large amount dilute sulfuric acid, organic wastes and products of their neutralization makes the benzene nitration a environmentally harmful process. The present process enables the preparation of nitrobenzene by vapor phase nitration of benzene over solid acid catalyst, MoO /SiO using nitric acid. This process is a clean and environment friendly process without use of sulphuric acid.

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Pune, India

Mohan Keraba Dongare