Sharad V Lande

Reliance Industries Limited · R & D

Benzyl naphthalenes are versatile compounds having multiple applications in dyes, fine chemicals, and pharmaceuticals etc. Herein, we present benzylation of naphthalene with benzyl chloride using a chloroaluminate ionic liquid which we have reported recently. The catalyst is highly active, selective and required in very low quantity i.e., 0.5% w/w...

Chloroaluminate ionic liquids (ILs) have been immensely used as homogeneous catalyst in Friedel-Crafts reaction. We have recently synthesized chloroaluminate ILs by reacting aluminium chloride with a hydrophobic neutral ligand i.e. tributylamine (TBA:AlCl3). The current study elaborates on the investigations of the composition of the ionic liquids...

Friedel–Crafts alkylation reactions constitute a very important class of reactions which are usually catalysed in the liquid phase using Lewis acids at the industrial scale. Diphenyl methane synthesised by Friedel–Crafts alkylation from benzene with benzyl chloride has been interesting in organic synthesis, perfumes and dyes. The new environmental...

Industrial Catalysis

There is provided a method for regenerating a spent dehydrogenation catalyst used in the conversion of n-paraffin to olefin. The method comprises method steps for removing the coke by treating the catalyst with an ozone-oxygen stream followed by an oxygen stream. The catalyst is stabilized by passing a nitrogen stream and the stabilized catalyst is...

The present invention discloses a catalyst composition for hydropurification of crude terephthalic acid and a process for providing the catalyst composition. The catalyst composition of the present invention comprises: a carrier material having a porous absorptive surface with a BET surface area of 200 – 400 m2/g and a pore volume of 1 to 2.5 cm3/g...

The present disclosure relates to a dehydrogenation catalyst composite comprising at least one alumina support impregnated with at least one layer of at least one alkaline earth metal element and at least one layer comprising at least one catalytic metal element, at least one group VIA element and optionally, at least one halogen element. The prese...

Colloidal metal nanoparticles are of great interest because of their use as catalysts, photocatalysts, adsorbents, and sensors as well as their application in optical, electronic, and magnetic devices. Supported bimetallic systems represent a large part of heterogeneous catalysts which have been used in various reactions important in the chemical,...

In the present invention a selective hydrogenation catalyst composition comprising (a) an inorganic oxide carrier; and (b) fine-alloy particles of an active metal and a promoter metal components dispersed on the surface of the inorganic oxide carrier is disclosed. The improved dispersion of the active component is found to be around 30 % of surface...

In this paper, we report loading of ZnCl2 on microporous medium pore high surface area zeolite, which was achieved by incipient wetness method. The zinc-modified mobil composite material -22 (Zn-MCM-22) was systematically characterized by powder X-ray diffraction, N2 adsorption-desorption analysis, scanning electron microscopy and Fourier transform...

We have attempted a green alternative to reuse the spent fluid catalytic cracking (FCC) catalyst that is used in petroleum refining industry for the upgradation and purification of various petroleum streams and residues. The spent FCC zeolite-based catalyst modified by enhancing the acidic properties by incorporating Zn and In metals in the matrix....

In this work, a new catalyst was prepared by employing carbon molecular sieve (CMS) with natural kaolinite clay and is named UDCaT-8. The catalyst was fully characterized by XRD, DTA–TGA, FTIR, SEM and BET surface area and pore size analysis. o-Xylene nitration was conducted under solventless and room temperature condition using UDCaT-8 to get high...

The Claisen rearrangement of allyl phenyl ethers is a fundamental reaction in organic synthesis with a variety of applications in perfumes, flavors, pharmaceuticals, agrochemicals, polymers, fine chemicals, and intermediate industries. The development of environmentally benign processes using solid acid catalysts is becoming an area of growing inte...

Reactions in three immiscible liquid phases are attractive, and one of the phases can be the locale of the reaction, which will have a dramatic effect on the product distribution in complex reactions. Thus, converting a bi-liquid (L−L) system into tri-liquid (L−L−L) phases is of considerable scientific and commercial interest. Such systems encounte...

The Claisen rearrangement of allyl phenyl ethers is a fundamental reaction in organic synthesis with a variety of applications in perfumes, flavors, pharmaceuticals, agrochemicals, polymers, fine chemicals, and intermediate industries. The development of environmentally benign processes using solid acid catalysts is becoming an area of growing inte...

Borohydride reductions, although common, have not been studied from kinetic and mechanistic view points due to complex chemistry and more so, there is no report on kinetics and mechanism of such reductions under phase transfer catalysis. The novelties of phase transfer catalysed chemoselective reduction of citronellal to citronellol using sodium bo...

The alkylation of vanillin, containing three reactive groups, with benzyl chloride is challenging and can lead to both C- and O-alkylated products, particularly when liquid–liquid (L–L) phase transfer catalysis (PTC) is used. In the current studies, solid–liquid (S–L) PTC has been employed in the reaction of solid sodium salt of vanillin and benzyl...

The Claisen rearrangement of allyl phenyl ethers results into valuable products for fragrance, flavours, food, pharmaceuticals and intermediate industries and is typically initiated by using very high temperatures, normally beyond 200°C. Homogeneous acid catalysts are also used for this rearrangement, which could be replaced profitably by using eco...

The Claisen rearrangement of allyl aryl ethers provides a convenient route to obtain allyl phenols which are precursors to a variety of natural products. All uncatalyzed Claisen rearrangements are energy intensive requiring temperatures above 200°C whereas those using homogeneous acid catalysts leads to a loss in yield and selectivity, in addition...

The selective reduction of nitroaromatics to the corresponding amines is an important transformation since many aromatic amines exhibit biological activities and find a multitude of industrial applications, being intermediates for the synthesis of dyes, pharmaceuticals and agrochemicals. A variety of nitroaromatics dissolved in organic solvents was...

The Claisen rearrangement of allyl phenyl ethers is a valuable reaction in organic synthesis having a variety of applications in perfumes, flavours, pharmaceuticals, and intermediate industries. The replacement of traditional environmentally threatening homogeneous acid catalysts in organic processes with solid acid catalysts is an important green...

Reactions in three immiscible liquid phases (L–L–L) are attractive, and one of the phases can be the locale of reaction which will have a dramatic effect on product distribution in complex reactions. Thus, converting a bi-liquid system into a tri-liquid phase is of considerable scientific and commercial interest. 4-Benzyloxy-vanillin is used as a p...

p-Cresylphenyl acetate is a very important perfume that finds wide applications and possesses an organoleptic character similar to those of honey, nuts, and butter. It is produced by mineral acid-catalyzed esterification of p-cresol with phenylacetic acid. Use of homogeneous acid catalysts leads to posttreatment pollution problems apart from the qu...

p-Cresylphenyl acetate is a very important perfume that finds wide applications and possesses an organoleptic character similar to those of honey, nuts, and butter. It is produced by mineral acid-catalyzed esterification of p-cresol with phenylacetic acid. Use of homogeneous acid catalysts leads to posttreatment pollution problems apart from the qu...