Keywords: هیدروالکتیت کالدیزه شده; Guaifenesin (or (RS)-3-(2-methoxyphenoxy) propane-1,2-diol); Guaiacol (or 2-methoxyphenol) and glycidol (or 2,3-epoxy-1-propanol); Biomass valorization; Hydrotalcite; Calcined hydrotalcite; Green chemistry; Kinetics;