摘要:
The present invention relates to a process for preparing dicarboxylic acids, in particular adipic acid (1,6-hexanedioic acid), through the action of nitric acid, from cyclic alcohols or ketones with a corresponding number of carbon atoms, in the presence of one or more nitrogen oxides in a molar concentration in the reaction medium of greater than 2.5 mmol per kg of reaction medium.
摘要:
A process for preparing an aromatic compound or compounds where at least one mandelic group -CHOH-COOH is described, comprising a reaction for condensation of at least one aromatic compound with glyoxylic acid or derivatives thereof, wherein said condensation reaction is carried out substantially in the absence of any acid or any base added to the reaction medium. The condensation reaction is followed by an oxidation reaction in order to obtain aromatic aldehyde.