Assertion: formic acid | /r/HasProperty | each alkyl
Facets:
Source sentences:
text: We have found that this object is achieved and that, accordingly, formic acid can be recovered from its mixtures with solvents of the general formula I ##STR3## where R1 is hydrogen, methyl, ethyl or vinyl and R2 and R3 are each alkyl, cycloalkyl, aryl or aralkyl, or R2 and R3 together form a 1,4- or 1,5-alkylene group, in each case of not more than 8 carbon atoms, with the provisos that the sum of the number of carbon atoms in R2 and R3 is 7 to 14 and that only one of these radicals is aryl, in an economical and technically advantageous manner by distillation, if the distillation is carried out in the presence of a carboxamide II which has a boiling point lower than that of the solvent I.