Pinklesh Arora - Academia.edu (original) (raw)

Papers by Pinklesh Arora

Tenside Surfactants Detergents, 2018

This paper reviews the various technologies involved in the synthesis of anionic phosphate ester ... more This paper reviews the various technologies involved in the synthesis of anionic phosphate ester surfactants. Use of base material such as alcohol ethoxylates, alkyl phenol ethoxylates, fatty acid ethoxylates and phosphating reagents plays a key role on the applications and properties of phosphate ester surfactants. Also roles are played by the reaction conditions maintained and charging conditions on the mono-diester ratio. In this paper attempt has been made to review the base materials used for the synthesis of phosphate esters, synthesis processes and their effect on the properties of phosphate esters, applications and global scenario of phosphate ester surfactants.

This research work is based on the studies on the binding of soluble ovalbumin, transfusion gelat... more This research work is based on the studies on the binding of soluble ovalbumin, transfusion gelatin, α-amylase proteins with vanadium and molybdenum etc. applying various physico-chemical methods such as pH-metery, dialysis equilibrium, spectrophotometry, polarography etc. The work also includes the binding of metal hydrous oxide sols to these proteins. The effect of anionic surfactants like triethanolamine lauryl sulphate, sodium dodecyl benzene sulphonate was also studied on ovalbumin casein and α-amylase by viscometric and other related methods. The binding results are helpful in proposing a mechanism of ligand interaction with biopolymers in livings mediated by metal ions. The additions of proteins may decrease the critical micelle concentrations of the surfactants. This aspect possesses a good means of increasing the detergency of the surfactants.

Sulfur and chlorine containing bifunctional diols with C-S bond has been prepared starting from c... more Sulfur and chlorine containing bifunctional diols with C-S bond has been prepared starting from chloroepoxy alkane and thioalcohol. The studies of FTIR, TLC, HPLC and NMR have been used to understand the reaction mechanism, as well as for optimization of the reaction parameters. The reaction is highly exothermic and the effect of temperature, rate of addition of reagents and reaction time are important factors affecting the formation of diol. Viscosity studies, HPLC, FTIR, NMR and acid number studies have shown that, these parameters could be used as process control parameters for the synthesis of diol. Refractive index of the synthesized diol is found to be higher than that of the reactants used.

Inorganic Chemistry Communications

Current Science

Refrigeration is a process to transfer heat from the objects for cooling and freezing for maintai... more Refrigeration is a process to transfer heat from the objects for cooling and freezing for maintaining the temperature of surroundings for preservation purposes and comfort. Refrigerants are the materials to use in airconditioning and refrigeration system. This article describes the developments and history of the first-, second-, third-and fourth-generation refrigerants. Moreover, the focus is on a fourth-generation refrigerant, viz. HFO-1234yf having zero ozone depletion potential and very low global warming potential. Synthesis procedure, chemistry, applications and consumption norms of HFO-1234yf are explained.

International Journal of Carbohydrate Chemistry, Apr 24, 2013

Guar gum and its derivatives are highly important industrial hydrocolloids as they find applicati... more Guar gum and its derivatives are highly important industrial hydrocolloids as they find applications in various industrial sectors. Guar is a polymer of high molecular weight and its aqueous solutions exhibit unique rheological properties, which has led to its wide acceptance by the industry. In certain industrial applications low molecular weight guar and its derivatives are needed, and conventionally chemical depolymerisation of guar is carried out for this purpose. Radiation processing is a novel and green technology for carrying out depolymerization and can be an ideal substitute for chemical depolymerisation technique. In order to study the effect of radiation on guar derivatives, three types of derivatives have been taken in the present study: carboxymethyl, hydroxyethyl, and methyl guar. The effect of 1-50 KGy radiation dose on the rheological behavior of these derivatives has been studied, and the results have been described in the present paper. The effect on storage and loss modulus with respect to frequency and effect on viscosity with respect to shear rate have been discussed in detail.

Tenside Surfactants Detergents, 2018

This paper reviews the various technologies involved in the synthesis of anionic phosphate ester ... more This paper reviews the various technologies involved in the synthesis of anionic phosphate ester surfactants. Use of base material such as alcohol ethoxylates, alkyl phenol ethoxylates, fatty acid ethoxylates and phosphating reagents plays a key role on the applications and properties of phosphate ester surfactants. Also roles are played by the reaction conditions maintained and charging conditions on the mono-diester ratio. In this paper attempt has been made to review the base materials used for the synthesis of phosphate esters, synthesis processes and their effect on the properties of phosphate esters, applications and global scenario of phosphate ester surfactants.

This research work is based on the studies on the binding of soluble ovalbumin, transfusion gelat... more This research work is based on the studies on the binding of soluble ovalbumin, transfusion gelatin, α-amylase proteins with vanadium and molybdenum etc. applying various physico-chemical methods such as pH-metery, dialysis equilibrium, spectrophotometry, polarography etc. The work also includes the binding of metal hydrous oxide sols to these proteins. The effect of anionic surfactants like triethanolamine lauryl sulphate, sodium dodecyl benzene sulphonate was also studied on ovalbumin casein and α-amylase by viscometric and other related methods. The binding results are helpful in proposing a mechanism of ligand interaction with biopolymers in livings mediated by metal ions. The additions of proteins may decrease the critical micelle concentrations of the surfactants. This aspect possesses a good means of increasing the detergency of the surfactants.

Sulfur and chlorine containing bifunctional diols with C-S bond has been prepared starting from c... more Sulfur and chlorine containing bifunctional diols with C-S bond has been prepared starting from chloroepoxy alkane and thioalcohol. The studies of FTIR, TLC, HPLC and NMR have been used to understand the reaction mechanism, as well as for optimization of the reaction parameters. The reaction is highly exothermic and the effect of temperature, rate of addition of reagents and reaction time are important factors affecting the formation of diol. Viscosity studies, HPLC, FTIR, NMR and acid number studies have shown that, these parameters could be used as process control parameters for the synthesis of diol. Refractive index of the synthesized diol is found to be higher than that of the reactants used.

Inorganic Chemistry Communications

Current Science

Refrigeration is a process to transfer heat from the objects for cooling and freezing for maintai... more Refrigeration is a process to transfer heat from the objects for cooling and freezing for maintaining the temperature of surroundings for preservation purposes and comfort. Refrigerants are the materials to use in airconditioning and refrigeration system. This article describes the developments and history of the first-, second-, third-and fourth-generation refrigerants. Moreover, the focus is on a fourth-generation refrigerant, viz. HFO-1234yf having zero ozone depletion potential and very low global warming potential. Synthesis procedure, chemistry, applications and consumption norms of HFO-1234yf are explained.

International Journal of Carbohydrate Chemistry, Apr 24, 2013

Guar gum and its derivatives are highly important industrial hydrocolloids as they find applicati... more Guar gum and its derivatives are highly important industrial hydrocolloids as they find applications in various industrial sectors. Guar is a polymer of high molecular weight and its aqueous solutions exhibit unique rheological properties, which has led to its wide acceptance by the industry. In certain industrial applications low molecular weight guar and its derivatives are needed, and conventionally chemical depolymerisation of guar is carried out for this purpose. Radiation processing is a novel and green technology for carrying out depolymerization and can be an ideal substitute for chemical depolymerisation technique. In order to study the effect of radiation on guar derivatives, three types of derivatives have been taken in the present study: carboxymethyl, hydroxyethyl, and methyl guar. The effect of 1-50 KGy radiation dose on the rheological behavior of these derivatives has been studied, and the results have been described in the present paper. The effect on storage and loss modulus with respect to frequency and effect on viscosity with respect to shear rate have been discussed in detail.