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 article, an autoclave-based esterification of benzoic acid and substituted benzosic acids has been carried out over zeolite Hβ and HZSM5 using dimethyl carbonate as the methylating agent.
Abstract: Esterification of benzoic acid and substituted benzoic acids has been carried out efficiently over zeolite Hβ and HZSM5 in an autoclave using dimethyl carbonate (DMC) as the methylating agent. The wide applicability of this esterification method to esterify a wide range of aromatic carboxylic acids has been demonstrated. This method is a viable and safe alternative to other esterification processes, involving harmful alkylating agents and chemicals. Strong acid sites are responsible for the reaction. The reaction proceeds inside as well as outside the pores of the zeolites. The pore architecture of the zeolites and mass transfer limitations come into play only when the molecular diameter of the reactant molecules is greater than the pore size of the zeolites. Kinetic study shows that the reaction is first-order with respect to acid concentration.
77 citations
TL;DR: The optimisation of the methylation reaction for the simultaneous determination of (3,6-dichloro-2-methoxy)benzoic acid, (2-methyl-4-chlorophenoxy)- and (2,4- dichlorophenoxy)acetic acids showed that tetrabutylammonium salts act as catalysts.
77 citations
TL;DR: From the thermodynamic data it may be deduced that the enzymatic synthesis of hippuric acid cannot be simply the reverse of its hydrolysis; the synthesis must be coupled with an energy-yielding reaction.
77 citations
TL;DR: Micellar electrokinetic capillary chromatography of supernatants from L. casei and L. helveticus strains incubated under simulated cheese-ripening conditions confirmed that Tyr and Phe transamination and dehydrogenation pathways were active in both species and also showed these reactions were reversible.
77 citations
TL;DR: The aqueous Kolbe−Schmitt synthesis using resorcinol to yield 2,4-dihydroxy benzoic acid was performed in a microreactor rig as mentioned in this paper.
77 citations