Using propylene carbonate in extraction and absorption: A review

Zaretskii, M. I.; Rusak, V. V.; Chartov, E. M.

doi:10.3103/s1068364x08030095

Cited by 4 publications

(1 citation statement)

References 25 publications

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“…However, propylene glycol generated during the decomposition of PC is relatively nontoxic . Besides this, PC is an odorless and colorless solvent with a high boiling point, low vapor pressure, and high chemical stability, is noncorrosive, and has a low viscosity and very low coefficient of friction. , The superior properties and generation of ecologically acceptable byproducts on decomposition have stimulated the exploration of PC for various industrial applications such as (i) a carrier medium in ointment and cosmetic products, (ii) a plasticizer in polymer electrolyte system, , (iii) an alternative solvent for extraction, , electrochemistry, , electron paramagnetic resonance spectroscopy, organic synthesis and liquid enzyme formulation, , (iv) a CO 2 and H 2 S gas absorber, (v) a nail polish remover, , (vi) a polar additive for clay gellants, and (vii) a textile dye carrier. Recently, Sathish and coauthors developed a CSIR-CLRI solvent selection tool using GSK’s solvent selection guide as a basic database and identified PC as potential green solvent in leather making .…”

Section: Introductionmentioning

confidence: 99%

Application of GSK’s Model in Leather Making: Quantification of the Environmental Efficiency of a Green Solvent Based Deliming Process

Sathish

Thaikaivelan

Rao

2022

ACS Sustainable Chem. Eng.

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GlaxoSmithKline's solvents ranking model (GSK's SRM) was successfully applied to quantify the environmental efficiency of the cyclic carbonate based alkali neutralization process in leather making. Currently, cyclic carbonates have found interest within the green chemistry fraternity because of their availability, low toxicity, and biodegradability. An attempt has been made for the first time to use propylene carbonate (PC), as an alkali neutralizing agent (deliming agent) in leather making that completely avoided the generation of toxic ammonia gas. It is optimized that 1.5 and 2.5% w/w of PC is required to completely neutralize the alkali (calcium hydroxide) present in the goatskin and cow hide, respectively. Furthermore, the neutralization process obeys pseudo second order kinetics (R 2 : 0.999, k 2 : 3.72 x10 −3 g/ mg•min, h: 1.97 g/mg•min) and the rate of neutralization is faster than conventional ammonium salt based process (R 2 , 0.996; k 2 , 1.25 × 10 −3 g/mg•min; h, 0.79 g/mg•min). We demonstrate that the in situ formation calcium carbonate improves the dimensional stability and other organoleptic properties without affecting the chromium/dye diffusion. Besides this, the developed process enjoys 76.3, 92, and 96% reduction in total dissolved solids (TDS), total Kjeldahl nitrogen (TKN), and chloride content in wastewater, respectively. The environmental efficiency index (EEI) value of PC-based neutralization (EEI: 27.44) is 1.5 times higher than that for the conventional ammonium salt based system (EEI: 17.93). The study sheds light on the use of semiquantitative EEI in several industrial applications including leather for moving toward environmental sustainability packed with green chemistry principles.

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