Topic
Benzoic acid
About: Benzoic acid is a research topic. Over the lifetime, 11832 publications have been published within this topic receiving 167127 citations. The topic is also known as: Retardex & E210.
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TL;DR: In this study, different concentrations of four benzyl derivatives used as flavour ingredients were investigated for genotoxicity in in vitro and the highest concentration of benzoic acid increased both tail moment and % tail DNA.
67 citations
TL;DR: The stoichiometric use of hydrogen peroxide in the presence of a selenium-containing catalyst in water is reported as a new ecofriendly protocol for the synthesis of variously functionalized carboxylic acids and esters.
Abstract: The stoichiometric use of hydrogen peroxide in the presence of a selenium-containing catalyst in water is here reported as a new ecofriendly protocol for the synthesis of variously functionalized carboxylic acids and esters. The method affords the desired products in good to excellent yields under very mild conditions starting directly from commercially available aldehydes. Using benzaldehyde as a prototype the gram scale synthesis of benzoic acid is described, in which the aqueous medium and the catalyst could be recycled at last five times while achieving an 87% overall yield.
66 citations
TL;DR: In this article, the antioxidant properties of p-hydroxybenzoic, vanillic, syringic, 3,4-dihydroxybenzosic, p-coumaric, ferulic, sinapic and caffeic acids were studied in the concentration range 0.02-0.20 wt% during autoxidation at 100°C of lard and sunflower oil methyl esters (MEL and MESO, respectively).
Abstract: Antioxidative properties ofp-hydroxybenzoic, vanillic, syringic, 3,4-dihydroxybenzoic,p-coumaric, ferulic, sinapic and caffeic acids were studied in the concentration range 0.02–0.20 wt% during autoxidation at 100°C of lard and sunflower oil methyl esters (MEL and MESO, respectively). In both lipid systems, the derivatives of benzoic acid had weaker inhibiting properties than did the corresponding analogues of cinnamic acid. The effectiveness and strength of the antioxidative action were considerably lower in the lipid system MESO, which was rich in linoleic acid and was more easily oxidized. Thep-hydroxybenzoic, vanillic, syringic andp-coumaric acids in this system exercised no inhibiting effect. We established that the molecules of the investigated phenolic acids initiated the chain radical process of autoxidation, and the formed antioxidant radicals propagated the chains as a result of the reaction with the lipid substrate. These reactions proceeded at a higher rate in MESO than in MEL.
66 citations
TL;DR: Using a series flexible thioether ligands, a 1D infinite chain, a 2D interpenetrating sheet, and a chiral 3D framework were obtained and Luminescent properties of these compounds were studied.
Abstract: Using a series flexible thioether ligands, 4-(2-pyridylmethylthio)benzoic acid (HL1), 4-(4-pyridylmethylthio)benzoic acid (HL2) and 4-(3-pyridylmethylthio)benzoic acid (HL3), a 1D infinite chain [Zn3(L1)6]n (1), a 2D interpenetrating sheet [Zn(L2)2]n (2), and a chiral 3D framework [Zn(L3)2H2O]n (3) were obtained Luminescent properties of these compounds were also studied
66 citations
TL;DR: In this article, the concept of reactive extraction and effect of various parameters were discussed, which is very useful in the view of complete design of a reactive extraction process for the carboxylic acid production.
Abstract: Since last few decades, there has been a revitalization of attention towards new energy-efficient fermentation technology for large production of fermentation chemicals due to sharp increase in petroleum costs. Carboxylic acid has wide applications in various chemical, food, and pharmaceutical industries. A growing demand for biodegradable polymers, substitutes for both conventional plastic materials and new materials of specific uses such as controlled drug delivery or artificial prostheses, draws attention the need for improvement of conventional processes for carboxylic acids production. Reactive extraction is a multifunctional reactor having reaction and extraction in a single unit. This intensified approach has the closed loop process with sustainability. In present paper, the concept of reactive extraction and effect of various parameters were discussed. These studies are very useful in the view of complete design of a reactive extraction process for the carboxylic acid production. (14),(15), phenyl acetic acid (16), propionic acid (17)-(35), benzoic acid (36), pyridine-3-carboxylic acid (36), levulinic (37), butyric acid (27), (38), glycolic acid (40), itaconic acid (40), gluconic acid (41), etc. Also few reviews are available (42)-(45). In present paper various aspects for the development of reactive extraction process for the recovery of carboxylic acids has been discussed. Physical equilibrium, chemical equilibrium, extraction kinetics, effect of temperature, effect of substrate, effect of salts, effect of pH, back extraction equilibrium and kinetics, regeneration, toxicity, water co-extraction, economical has been analyzed and presented. This paper will be very useful in the context of design of intensifying process for the recovery of carboxylic acid by reactive extraction. The design window of the reactive extraction is shown in Fig. 1.
66 citations