Task: Translation
Input (Czech): Zp sob hydroxykarbonylace lakton , konkr tn  r zn²ch valerolakton  a jejich izomer , reakc  s oxidem uhelnat²m a vodou, za vzniku odpov daj c  dikarboxylov  kyseliny. Zp sob spo  v  v reakci oxidu uhelnat ho a vody nejm n  s jedn m laktonem, obsahuj c m 5 atom  uhl ku; v p° tomnosti · inn ho mno stv  iridiov ho katalyz toru a jodovan ho nebo bromovan ho promotoru, p°i em  mol rn  pom r promotor/iridium je v rozmez  od 0,1 : 1 a  do 20 : 1. Tento zp sob umo  uje v²hodn  p°eveden , zejm na gama-valerolaktonu, v adipovou kyselinu.\
Output (English): The present invention relates to a process for the hydroxycarbonylation of lactones, more precisely of the various valerolactones and their isomers; by reaction thereof with carbon monoxide and water; in order to form the corresponding dicarboxylic acid. More precisely, it consists in reacting carbon monoxide and water with at least one lactone having 5 carbon atoms, the reaction being carried out in the presence of an effective amount of an iridium catalyst and of an iodine-containing or bromine-containing promoter, whereby the promoter/Ir molar ratio being between 0.1/1 and 20/1. This process especially makes it possible to value-enhance gamma-valerolactone to adipic acid.