Decolorization of crude terpineol by adsorption

Hartanto, Yansen; Yaswari, Yestria; Zunita, Megawati; Soerawidjaja, Tatang Hernas; Indarto, Antonius

doi:10.1080/01496395.2017.1313863

Cited by 21 publications

(5 citation statements)

References 14 publications

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“…The adsorption mechanisms on carbon steel surfaces follow the Langmuir isotherm model and the Temkin isotherm model due to the ILs interaction with carbon steel surfaces assume the gas phase. Initially corrosion inhibitors were made in the gas phase in order to form a thin layer on the surface of carbon steel [37]. The Langmuir isotherm model was developed for observing the mechanism of the absorption and desorption of the molecules on the surface of the adsorbate with zero accumulation rate, which can be used to quantify the capacity of various concentrations of adsorbents.…”

Section: Results Of Inhibition Efficiency Test Of Il1 and Il2 As Corr...mentioning

confidence: 99%

Corrosion Inhibition Performances of Imidazole Derivatives-Based New Ionic Liquids on Carbon Steel in Brackish Water

et al. 2020

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In this study, imidazole derivative-based new ionic liquids were investigated as corrosion inhibitors. These new ionic liquids (ILs) are 1,3-dipropyl-2-(2-propoxyphenyl)-4,5-diphenylimidazole iodide (IL1) and 1,3-dibutyl-2-(2-butoxyphenyl)-4,5-diphenylimidazole iodide (IL2). The corrosion inhibition effects of two new ILs were observed on carbon steel in brackish water media (1% NaCl solution). Carbon steel coupons were exposed to 1% NaCl solution with various concentrations of ILs. Corrosion inhibition effects were tested by the electrochemical impedance spectroscopy (EIS) method and the Tafel method at various temperatures ranging from 25 °C to 55 °C. The results showed that ILs have potential as corrosion inhibitors and the adsorption mechanisms of IL1 and IL2 on carbon steel surfaces were also determined, which followed the Langmuir adsorption isotherm model. Acquisition of ∆Gads values of IL1 and IL2 were −35.04 and −34.04 kJ/mol, respectively. The thermodynamic data of the ILs show that semi-chemical and or physical adsorptions occurred on carbon steel surfaces.

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Section: Results Of Inhibition Efficiency Test Of Il1 and Il2 As Corr...mentioning

confidence: 99%

Corrosion Inhibition Performances of Imidazole Derivatives-Based New Ionic Liquids on Carbon Steel in Brackish Water

et al. 2020

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“…The reaction resulted in two-layers liquid formation and the separation was conducted using a separation funnel. The top layer was ‘oil layer’ composed of residual turpentine, terpineol, and by-products while the bottom layer was ‘water layer’ composed of acid and water residues [ 19 ]. After the phase-separation and adsorption for impurities removal, the product was analysed by Gas Chromatograph-Mass Spectrometry (Shimadzu GCMS-QP-2010 with Rtx-5MS capillary column) at conditions of 200 °C injection temperature, 70–190 °C column temperature with initial temperature of 70 °C for 2 min and heated up to 190 °C and held for 6 min with ramping of 30 °C/min.…”

Section: Methodsmentioning

confidence: 99%

“…The reaction resulted in two-layers liquid formation and the separation was conducted using a separation funnel. The top layer was 'oil layer' composed of residual turpentine, terpineol, and by-products while the bottom layer was 'water layer' composed of acid and water residues [19].…”

Section: Methodsmentioning

confidence: 99%

A method to control terpineol production from turpentine by acid catalysts mixing

Prakoso

Putra

Handojo

et al. 2020

Heliyon

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Terpineol, a promising valorisation product of pine industry, is widely used as an active ingredient for disinfectant soap, cleansers, perfumes, and pharmaceutical purposes. Synthesis of terpineol is generally carried out by separation of α-pinene compounds from crude turpentine through fractionation and then hydrated (addition of water) with the help of acid catalysts. However, direct turpentine hydration without pre-fractionation process can be more beneficial from economic and process point of views. This study aims to investigate the effect of both single and mixed/combined catalysts towards terpineol yield. Combined strong and weak acid catalysts were required to obtain high feed conversion and terpineol yield. The selectivity of terpineol is then correlated to the solubility of a weak/organic acid. In this study, the highest yield of terpineol was 54.0 ± 8.2%-w/w using combination of formic acid and sulphuric acid.

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“…Utilization of membrane materials in order to modify the interaction properties between the solute and membrane surface is closely related to adsorption processes. In other cases, a graphene-based material showed good affinity for adsorption processes for organic dyes [ 112 , 145 , 151 ]. Furthermore, similar materials also give good performance in nanofiltration processes [ 120 , 127 , 131 , 138 ].…”

Section: Utilization Of Graphene Oxide-based Nanofiltration For Mercury Removalmentioning

confidence: 99%

Graphene Oxide-Based Nanofiltration for Hg Removal from Wastewater: A Mini Review

Zunita

2021

Membranes

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Mercury (Hg) is one of heavy metals with the highest toxicity and negative impact on the biological functions of living organisms. Therefore, many studies are devoted to solving the problem of Hg separation from wastewater. Membrane-based separation techniques have become more preferable in wastewater treatment area due to their ease of operation, mild conditions and also more resistant to toxic pollutants. This technique is also flexible and has a wide range of possibilities to be integrated with other techniques. Graphene oxide (GO) and derivatives are materials which have a nanostructure can be used as a thin and flexible membrane sheet with high chemical stability and high mechanical strength. In addition, GO-based membrane was used as a barrier for Hg vapor due to its nano-channels and nanopores. The nano-channels of GO membranes were also used to provide ion mobility and molecule filtration properties. Nowadays, this technology especially nanofiltration for Hg removal is massively explored. The aim of the review paper is to investigate Hg removal using functionalized graphene oxide nanofiltration. The main focus is the effectiveness of the Hg separation process.

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Decolorization of crude terpineol by adsorption

Cited by 21 publications

References 14 publications

Corrosion Inhibition Performances of Imidazole Derivatives-Based New Ionic Liquids on Carbon Steel in Brackish Water

Corrosion Inhibition Performances of Imidazole Derivatives-Based New Ionic Liquids on Carbon Steel in Brackish Water

A method to control terpineol production from turpentine by acid catalysts mixing

Graphene Oxide-Based Nanofiltration for Hg Removal from Wastewater: A Mini Review

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