CO2-based Solvents

Marriott, Ray; Jessop, Philip G.; Barnes, M

doi:10.1016/b978-0-444-62746-9.00006-2

Cited by 7 publications

(2 citation statements)

References 106 publications

(56 reference statements)

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“…SHS possess the unique ability to switch between hydrophobic and hydrophilic properties. In one form, they exhibit low miscibility with water and hydrophobicity, while in another form, they display high miscibility with water and hydrophilicity (Marriott et al, 2015). These solvents eliminate the need for volatility, allowing for their direct reuse without distillation, thereby offering a potentially safer alternative.…”

Section: Introductionmentioning

confidence: 99%

Utilization of N,N-Dimethylcyclohexylamine in coconut oil extraction

2023

Int. J. Biosci.

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A novel extraction technique for coconut oil was sought, particularly, the utilization of a switchable hydrophilicity solvent (SHS), N,N-Dimethylcyclohexylamine (DMCHA). Copra samples were obtained, ground to reduce sample size and dried until the moisture was around 7%. Copra samples were used in both SHS and Soxhlet extraction, and oil yields were compared, as well as the oil qualities in terms of%FFA, peroxide value, iodine value, density, and refractive index. The moisture content of copra sample was reported to be ranging from 7-7.2%. The results showed that extraction using the switchable solvent yielded 42.3157±1.6191% coconut oil. SHS-extracted oil has a reported FFA value of 0.12, peroxide value of 13.66±0.7261, iodine value of 11.34±0.84, and refractive index value of 1.44108±0.00048; all of which agreed to the qualities of a crude coconut oil. This study have manifested that SHS based on a lipotropic tertiary amine, N,N-Dimethylcyclohexylamine, can be capably employed most relevantly to the extraction of coconut oil without the use of energy-intensive distillation processes.

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Section: Introductionmentioning

confidence: 99%

Utilization of N,N-Dimethylcyclohexylamine in coconut oil extraction

2023

Int. J. Biosci.

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“…4−6 A novel class of alternative solvents is gas-expanded liquids, 7−9 more particularly CO 2 -expanded liquids (CXLs). 10 They are considered as tunable solvents and very promising as they inherit the advantages of pressurized CO 2 and of traditional solvents in an optimal fashion: (1) the dissolved CO 2 can tune the physicochemical and transport properties of the solvent such as viscosity, density, and diffusivity across a large polarity range, and (2) the component organic solvent improves the solubility of polar compounds (Figure 1). The use of CXLs, on the other hand, can overcome the sustainable drawbacks of the required high working pressure of supercritical CO 2 and subsequently reduces the installation cost of equipment and energy consumption of operation.…”

Section: ■ Introductionmentioning

confidence: 99%

Modulating Biocatalytic Activity toward Sterically Bulky Substrates in CO₂-Expanded Biobased Liquids by Tuning the Physicochemical Properties

Hoang

Granero-Fernandez

Yamada

et al. 2017

ACS Sustainable Chem. Eng.

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The study of CO 2-expanded liquids using a green component such as a biobased solvent has been recently raised as a new concept for an alternative solvent and yet been largely unexplored in the literature for neither fundamental nor application studies. On the other hand, structural bulkiness of substrates remains one of the main limitations to promote enzymes as an efficient versatile catalytic tool for organic synthesis, especially biocatalysis in nonconventional solvents. Herein, we report a detailed investigation of CO 2-expanded biobased liquids as reaction media for improved biocatalysis of sterically hindered compounds. We found that CO 2 acts as a crucial trigger for various lipases to catalyze transesterification of challenging bulky alcohols in CO 2-expanded 2-methyltetrahydrofuran (MeTHF). Furthermore, this study determines the physicochemical and transport properties of CO 2-expanded MeTHF for the first time, which were then utilized for modulating biocatalytic activity. It was found that lipase activity increased with the accordingly decrease of the dipolarity of CO 2-expanded MeTHF, which is tunable by altering the concentration of CO 2 in the solvent system.

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Synthesis of bioactive heterocyclic compounds using green solvents

Tiwari,

Banik

et al. 2024

Green Approaches in Medicinal Chemistry for Sustainable Drug Design

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CO2-based Solvents

Cited by 7 publications

References 106 publications

Utilization of N,N-Dimethylcyclohexylamine in coconut oil extraction

Utilization of N,N-Dimethylcyclohexylamine in coconut oil extraction

Modulating Biocatalytic Activity toward Sterically Bulky Substrates in CO₂-Expanded Biobased Liquids by Tuning the Physicochemical Properties

Synthesis of bioactive heterocyclic compounds using green solvents

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CO2-based Solvents

Cited by 7 publications

References 106 publications

Utilization of N,N-Dimethylcyclohexylamine in coconut oil extraction

Utilization of N,N-Dimethylcyclohexylamine in coconut oil extraction

Modulating Biocatalytic Activity toward Sterically Bulky Substrates in CO2-Expanded Biobased Liquids by Tuning the Physicochemical Properties

Synthesis of bioactive heterocyclic compounds using green solvents

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Modulating Biocatalytic Activity toward Sterically Bulky Substrates in CO₂-Expanded Biobased Liquids by Tuning the Physicochemical Properties