ChemInform Abstract: Green Process Development for the Synthesis of Aliphatic Symmetrical N,N′-Disubstituted Thiourea Derivatives in Aqueous Medium.

ChemInform ◽  
2015 ◽  
Vol 46 (20) ◽  
pp. no-no
Author(s):  
Asha D. Jangale ◽  
Priyanka P. Kumavat ◽  
Yogesh B. Wagh ◽  
Yogesh A. Tayade ◽  
Pramod P. Mahulikar ◽  
...  
Keyword(s):  
Aqueous Medium ◽  
Process Development ◽  
Green Process ◽  
Thiourea Derivatives

scholarly journals Green Process Development for the Synthesis of Aliphatic SymmetricalN,N′-Disubstituted Thiourea Derivatives in Aqueous Medium

2014 ◽  
Vol 45 (3) ◽  
pp. 376-385 ◽  
Author(s):  
Asha D. Jangale ◽  
Priyanka P. Kumavat ◽  
Yogesh B. Wagh ◽  
Yogesh A. Tayade ◽  
Pramod P. Mahulikar ◽  
...  
Keyword(s):  
Aqueous Medium ◽  
Process Development ◽  
Green Process ◽  
Thiourea Derivatives

ChemInform Abstract: Green Process Development for the Synthesis of Aliphatic Symmetrical N,N′-Disubstituted Thiourea Derivatives in Aqueous Medium.

ChemInform ◽  
2015 ◽  
Vol 46 (21) ◽  
pp. no-no
Author(s):  
Asha D. Jangale ◽  
Priyanka P. Kumavat ◽  
Yogesh B. Wagh ◽  
Yogesh A. Tayade ◽  
Pramod P. Mahulikar ◽  
...  
Keyword(s):  
Aqueous Medium ◽  
Process Development ◽  
Green Process ◽  
Thiourea Derivatives

scholarly journals Green Process Development for the Synthesis of Aliphatic Symmetrical N,N′-Disubstituted Thiourea Derivatives in Aqueous Medium

2014 ◽  
Vol 45 (2) ◽  
pp. 236-244 ◽  
Author(s):  
Asha D. Jangale ◽  
Priyanka P. Kumavat ◽  
Yogesh B. Wagh ◽  
Yogesh A. Tayade ◽  
Pramod P. Mahulikar ◽  
...  
Keyword(s):  
Aqueous Medium ◽  
Process Development ◽  
Green Process ◽  
Thiourea Derivatives

scholarly journals In situ Generated Ru(0)-HRO@Na-β From Hydrous Ruthenium Oxide (HRO)/Na-β: An Energy-Efficient Catalyst for Selective Hydrogenation of Sugars

2020 ◽  
Vol 8 ◽  
Author(s):  
Sreedhar Gundekari ◽  
Heena Desai ◽  
Krishnan Ravi ◽  
Joyee Mitra ◽  
Kannan Srinivasan
Keyword(s):  
Aqueous Medium ◽  
Reaction Temperature ◽  
Energy Efficient ◽  
Ruthenium Oxide ◽  
Green Process ◽  
Sugar Alcohols ◽  
Reaction Conditions ◽  
Efficient Catalyst ◽  
Hydrogenation Reactions

A green process for the hydrogenation of sugars to sugar alcohols was designed in aqueous medium using hydrous ruthenium oxide (HRO) as a pre-catalyst supported on Na-β zeolite. Under optimized reaction conditions, sugars such as xylose, glucose, and mannose converted completely to the corresponding sugar alcohols xylitol, sorbitol, and mannitol with 100% selectivity. The pre-catalyst (HRO) is converted in situ to active Ru(0) species during the reaction under H2, which is responsible for the hydrogenation. The catalyst was recyclable up to five cycles with no loss in activity. The reduction of HRO to the active Ru(0) species is dependent on the reaction temperature and H2 pressure. Ru(0) formation increased and consequently an increased hydrogenation of sugars was observed with an increase in reaction temperature and hydrogen pressure. Further, in situ generation of Ru(0) from HRO was assessed in different solvents such as water, methanol, and tetrahydrofuran; aqueous medium was found to be the most efficient in reducing HRO. This work further demonstrates the use of supported HRO as an efficient pre-catalyst for biomass-based hydrogenation reactions.

Colorimetric detection of fluoride ion in aqueous medium by thiourea derivatives: a transition metal ion assisted approach

2021 ◽  
Author(s):  
Sanjeev Pran Mahanta ◽  
Diganta Choudhury ◽  
Rituraj Das ◽  
Dhrubajyoti Talukdar ◽  
Plaban Jyoti Sarma ◽  
...  
Keyword(s):  
Transition Metal ◽  
Aqueous Medium ◽  
Metal Ion ◽  
Colorimetric Detection ◽  
Fluoride Ion ◽  
Transition Metal Ion ◽  
Thiourea Derivatives ◽  
Colorimetric Response

The work explores the position of hydroxyl moiety and its participation in intramolecular H-bonding towards dictating the fluoride selective colorimetric response in functionalized thiourea derivatives. Study reveals the pivotal aspect...

scholarly journals Eco-dyeing of silk with Dhavdi flowers and its fastness evaluation

2009 ◽  
Vol 1 (2) ◽  
pp. 173-179
Author(s):  
Meenu Srivastava ◽  
Preeti Udawat
Keyword(s):  
Aqueous Medium ◽  
Copper Sulphate ◽  
Process Development ◽  
Ferrous Sulphate ◽  
Colour Change ◽  
Silk Fabric ◽  
Fastness Properties ◽  
Colour Fastness ◽  
Dry And Wet Conditions ◽  
Silk Material

The present study is based on the process development for colouring of silk yarns with Dhavdi flowers using selected mordants to study its effects on colour fastness properties and optimization of different extraction conditions, duration and concentration for better dye and its shades. The results revealed that aqueous medium was suitable for extraction of dye from pink petals of Dhavdi flowers for one hour. The shades of midbuff, sand stone ,coffee and olive green brown were obtained by taking 4 g dried powder of dhavdi dye for dyeing 1 gram of silk material for 45 minutes. All the four mordants were found suitable for application on silk, 10 % of alum, 3 % of chrome, 2 % of copper sulphate and 3% ferrous sulphate were found to produce best shades on silk material. Post mordanting had resulted in darker shades in all the mordant. Simultaneous mordanting method was found best in case of chrome mordant. Excellent to outstanding fastness to sunlight was found in all mordanted samples. There was absolutely no staining in washed samples. Colour change was not found in the samples subjected to crocking in both dry and wet conditions except in case of ferrous mordanted samples,. The colour was stable as shown by their higher resistance towards acidic and alkaline perspiration. Hence, the dye obtained from Dhavdi flowers proved to be extremely good and can be recommended for dyeing silk fabric.

ChemInform Abstract: A Concise Synthesis of Substituted Thiourea Derivatives in Aqueous Medium.

ChemInform ◽  
2010 ◽  
Vol 41 (30) ◽  
pp. no-no
Author(s):  
Mahagundappa R. Maddani ◽  
Kandikere R. Prabhu
Keyword(s):  
Aqueous Medium ◽  
Thiourea Derivatives

Green process development for the preparation of 2,6-dibromo-4-nitroaniline from 4-nitroaniline using bromide–bromate salts in an aqueous acidic medium

RSC Advances ◽  
2016 ◽  
Vol 6 (93) ◽  
pp. 90184-90187
Author(s):  
Venkatanarayana Pappula ◽  
Subbarayappa Adimurthy
Keyword(s):  
Organic Solvent ◽  
Acidic Medium ◽  
Process Development ◽  
Solvent Free ◽  
Green Process ◽  
Ambient Conditions ◽  
Free Process ◽  
Aqueous Acidic Medium

Organic solvent-free process for the preparation of 2,6-dibromo-4-nitroaniline, from 4-nitroaniline using 2 : 1 bromide–bromate salts under aqueous acidic medium at ambient conditions has been developed.

Green process development for apple-peel pectin production by organic acid extraction

2019 ◽  
Vol 204 ◽  
pp. 97-103 ◽  
Author(s):  
Eun-Hi Cho ◽  
Ho-Tak Jung ◽  
Byung-Hoo Lee ◽  
Hyun-Seok Kim ◽  
Jin-Kyu Rhee ◽  
...  
Keyword(s):  
Organic Acid ◽  
Process Development ◽  
Acid Extraction ◽  
Green Process ◽  
Apple Peel
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