Nitration of the lignin model compounds 3-(3,4-dimethoxyphenyl)-1-propanol and 3-(4-hydroxy-3-methoxyphenyl)-1-propanol

Sergeeva, L. L.; Shorygina, N. N.; Lopatin, B. V.

doi:10.1007/bf00863122

Cited by 2 publications

(2 citation statements)

References 4 publications

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“…54 The result of the reaction of nitric acid with aromatic compounds depends on many di®erent factors, including the structure of the organic substrate, reactant composition, consumption of nitric acid and the solvent. Signi¯cant research [55][56][57][58][59][60] has been devoted to the study of this reaction, which allowed the¯nding of some of the features of the reaction depending on the structure of the substrate and the basic conversion methods:…”

Section: Nitration Of Lsmentioning

confidence: 99%

Using Nitrated Lignosulfonates for the Synthesis of a Water-Based Magnetic Fluid

et al. 2019

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Nitrated lignosulfonates were used to synthesize a water-based magnetic fluid. Lignosulfonates were nitrated by nitric acid under mild conditions and without further purification were used to synthesize a magnetic fluid. Part of the iron(II) were oxidized with an excess of nitric acid, so that the magnetoactive phase under the condensation by action of sodium hydroxide was formed. Optimum conditions for nitration of lignosulfonates and synthesis of a magnetic fluid were experimentally established. The optimum consumption of iron(II) was 1.3–1.5[Formula: see text]g per 1[Formula: see text]g of sodium lignosulfonate. Unlike the initial lignosulfonates, nitrated lignosulfonates have peptizing properties, due to which the precipitate formed during condensation was dispersed to nanoparticles (15–30[Formula: see text]nm). The resulting magnetic fluid had a high magnetic activity and was stable for a long time.

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Section: Nitration Of Lsmentioning

confidence: 99%

Using Nitrated Lignosulfonates for the Synthesis of a Water-Based Magnetic Fluid

et al. 2019

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“…Nitrogen dioxide fuels the autocatalytic reaction between nitric acid and polysaccharides, through its reaction with water to form more nitrous acid and nitric acid. Nitrous acid carries out the substrate oxidation for the polysaccharides and also accounts for the autocatalytic characteristics of lignin oxidation by facilitating intermediate nitration reactions, methoxyl cleavage, and the oxidation and ring opening of quinones and quinoid intermediate products to the final reaction products [24,25].…”

Section: Introductionmentioning

confidence: 99%

Production of oxalic acid from sawdust using coal fly ash as a catalyst

2021

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The production of oxalic acid from sawdust using a mixture of strong nitric acid and concentrated sulphuric acid with coal fly ash as a catalyst has been explored. Operating parameters affecting the reaction were determined to be temperature, mesh size and amount of fly ash catalyst, time and the $${\text{HNO}}_{3} :{\text{H}}_{2} {\text{SO}}_{4}$$ HNO 3 : H 2 SO 4 ratio. A maximum oxalic acid yield of 84% was obtained using a mixture of 60% $${\text{HNO}}_{3} {\text{ and }}40 \%{\text{ H}}_{2} {\text{SO}}_{4}$$ HNO 3 and 40 % H 2 SO 4 at 70 °C and a reaction time of 150 minutes. Coal fly ash with particle size of 50–100 μm proved to be a suitable and efficient catalyst, and the optimum quantity of catalyst employed was 5g of fly ash for every 100g of sawdust.

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Nitration of the lignin model compounds 3-(3,4-dimethoxyphenyl)-1-propanol and 3-(4-hydroxy-3-methoxyphenyl)-1-propanol

Cited by 2 publications

References 4 publications

Using Nitrated Lignosulfonates for the Synthesis of a Water-Based Magnetic Fluid

Using Nitrated Lignosulfonates for the Synthesis of a Water-Based Magnetic Fluid

Production of oxalic acid from sawdust using coal fly ash as a catalyst

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