Synthesis of L-menthyl isovalerate by esterification of isovaleric acid with L-menthol under microwave irradiation

Suerbaev, Kh. A.; Kudaibergenov, Nurbolat; Аппазов, Н. О.; Zhaksylykova, G. Zh.

doi:10.1134/s1070428016040205

Cited by 5 publications

(5 citation statements)

References 4 publications

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“…This is the first research evaluating the recovery of iso-butyrate and iso-valerate by the production of methyl iso-butyrate and methyl iso-valerate. The esterification of those acids has been marginally studied in the production of esters with other alcohols, in those cases, their esterification yields (50%) were lower than the reported in this research (75 and 83%) [28,29]. The esterification reaction was more efficient for the acids with larger carbon chain; this contradicts the results obtained by Liu et al [25], which showed that a larger carbon chain will reduce esterification reaction efficiency.…”

Section: Discussioncontrasting

confidence: 77%

Evaluation of Esterification and Membrane Based Solvent Extraction as Methods for the Recovery of Short Chain Volatile Fatty Acids from Slaughterhouse Blood Anaerobic Mixed Fermentation

Plácido

Zhang

2017

Waste Biomass Valor

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CO 2 per year by 2030 [1]. Petroleum-based materials and chemical have been replaced by biological-based materials and chemicals with environmental advantages such as sustainability and biodegradability [2, 3]. One of these petroleum based-chemicals is the short chain carboxylic acids or volatile fatty acids (VFA). VFA are carboxylic acids with a carbon chain between 2 and 7 carbons [acetic (2), propionic (3), iso-butyric (4), n-butyric (4), iso-valeric (5), valeric (5), hexanoic (6), and heptanoic (7)]. Industrially, VFA are produced in a petroleum-based process using different types of chemical reactions such as oxidations, dehydrogenation, carbonylation, etc. VFA are utilized in several industries as precursor of different products such as solvents (methyl acetate, ethyl acetate), inks, coatings (cellulose acetate, cellulose butyrate) [4], polymers [cellulose acetate, polyvinyl acetate, polyhydroxialkanoates (PHA)], artificial flavors (ethyl butyrate, ethyl propionate), and scents (methyl butyrate, methyl valerate). The several VFA uses have generated a multibillion dollars industry with a considerably predicted increment in the next years [5]. Besides petroleum-based processes, VFA can be produced by biological methods. Acetic acid production by anaerobic fermentation is the most well-known VFA production. This process is only applied in the vinegar production because it is still economically uncompetitive compared with the acetic acid petroleum-based production. To reduce the difference between petroleum and biological based VFA production it is necessary to improve the upstream and downstream processing. The upstream processes have been improved by using wastes as substrates to produce VFA [6-9]. Carbohydrate based residues such as paper wastes, lignocellulosic material, municipal solid wastes, etc. are the most common wastes employed in the production of VFA. In our past research, we evaluated the production of VFA using protein rich Abstract Two routes, esterification and membrane based solvent extraction, were tested for their efficiency to extract volatile fatty acids (VFA) (acetic, propionic, butyric, isobutyric, iso-valeric and valeric acids) produced from the anaerobic-mixed fermentation of slaughterhouse blood. A range of operational parameters and reagents were assessed to optimize each system. Esterification recovered VFA as methyl esters with the production of ammonium sulphate as a value-added by-product of the esterification reaction. A membrane extraction system, comprised of a hydrophobic membrane and extractant using octanol/TOA (trioctylamine), was efficient to separate butyric and iso-valeric acids in favour of acetic acid from the fermentation broth. These results provided important information for the development of a carboxylate-platform bio-refinery using highprotein wastes as substrate.

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Section: Discussioncontrasting

confidence: 77%

Evaluation of Esterification and Membrane Based Solvent Extraction as Methods for the Recovery of Short Chain Volatile Fatty Acids from Slaughterhouse Blood Anaerobic Mixed Fermentation

Plácido

Zhang

2017

Waste Biomass Valor

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“…Carbonylation reactions in the presence of palladium complexes significantly enriched the methods for obtaining carbonyl compounds [12][13][14]. The alkoxycarbonylation reactions in the presence of palladium make it possible to effectively convert unsaturated compounds, CO, and alcohols into the corresponding derivatives of carboxylic acids [15][16][17].…”

Section: үш компонентті Pdcl 2 (Pphmentioning

confidence: 99%

HYDROETHOXYCARBONYLATION OF CYCLOPENTENE IN THE PRESENCE OF A THREE-COMPONENT PdCl2(PPh3)2-PPh3-AlCl3 SYSTEM

ZHAKSYLYKOVA,

SHALMAGAMBETOV,

KUDAIBERGENOV

et al. 2023

NiG

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Carbon monoxide-based synthesis is an extensive and promising branch of organic synthesis. The interest in this area is primarily due to the wide synthetic capabilities of C1 chemistry, as well as the gradual depletion of traditional sources of hydrocarbon raw materials and the rise in the cost of petroleum products. In this regard, the development of new processes based on alternative sources of raw materials is an urgent task.

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“…We propose the processing of rice waste into biochar and its application to improve the characteristics of soils. The authors of the paper have a groundwork on the thermal processing of plant waste and the obtainment of biochar and coal sorbents from them, which have high sorption characteristics [11][12][13][14][15][16][17].…”

Section: Issn 2224-5286mentioning

confidence: 99%

Obtaining Biochar From Rice Husk and Straw

Аппазов

Bazarbayev

Assylbekkyzy

et al. 2021

Series Chemistry and Technology

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This paper presents the results of research on obtaining biochar from agricultural plant waste such as rice husk and straw. The selection of the optimal conditions for thermolysis, such as the duration and temperature of the process, has been conducted. The thermolysis products are characterized for iodine adsorption activity, cumulative water pore volume, and for bulk density. The porous structure of the obtained products has been studied by scanning electron microscopy. Based on the results of the research conducted, it has been found that biochars obtained from husk and straw with a thermolysis duration of 30 minutes have low iodine sorption characteristics and water pore volumes. With an increase in the duration of thermolysis, the sorption characteristics improve, the optimal for the husk is the thermolysis duration of 60 minutes at a temperature of 500°C, and for straw, the optimal thermolysis duration is 60 minutes at a temperature of 300°C. The best option is biochar obtained from rice straw at a duration of 60 minutes and a thermolysis temperature of 300°C, having an iodine adsorption activity of 54.61%, a cumulative water pore volume of 0.941 cm3/g and a bulk density of 169.29 g/dm3. The obtained biochars from rice husk and straw have been studied by scanning electron microscopy at 4300 and 5000 times magnification, and they have a developed porous structure. According to the literature, it is known that biochar can also be used as a renewable energy source. Research has been carried out to determine the calorific value of the obtained biochars. To compare the calorific value of rice husk, straw and the obtained biochars, their heating values have been determined on a calorimeter. The highest heating value has a biochar obtained from husk at a duration of 60 minutes and at a thermolysis temperature of 400°C with a value of 17.520 kJ/g, the optimal for biochar obtained from straw is a duration of 60 minutes and a thermolysis temperature of 400°C with a value of 16.451 kJ/g. The experimental data obtained make it possible to use the obtained biochar from rice straw in the future as a biofertilizer to improve the characteristics of soils, as well as to use biochar obtained from rice husk to produce renewable fuel.

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Synthesis of L-menthyl isovalerate by esterification of isovaleric acid with L-menthol under microwave irradiation

Cited by 5 publications

References 4 publications

Evaluation of Esterification and Membrane Based Solvent Extraction as Methods for the Recovery of Short Chain Volatile Fatty Acids from Slaughterhouse Blood Anaerobic Mixed Fermentation

Evaluation of Esterification and Membrane Based Solvent Extraction as Methods for the Recovery of Short Chain Volatile Fatty Acids from Slaughterhouse Blood Anaerobic Mixed Fermentation

HYDROETHOXYCARBONYLATION OF CYCLOPENTENE IN THE PRESENCE OF A THREE-COMPONENT PdCl2(PPh3)2-PPh3-AlCl3 SYSTEM

Obtaining Biochar From Rice Husk and Straw

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