Amide-based compounds, production, recovery, purification and uses thereof

A method of producing at least one amide, comprising:

• providing an organic liquid comprising at least one ketoxime;
• providing at least one acid catalyst;
• adding the at least one catalyst to the organic liquid to form a rearrangement mass, wherein the rearrangement mass comprises at least one amide, at least one impurity, and the at least one catalyst;
• and heating the rearrangement mass to a temperature above about 115° C. for a period of time in order to break down some of the at least one impurity in the rearrangement mass.

A method of producing caprolactam, comprising:

• providing an organic liquid comprising at least one ketoxime;
• providing at least one acid catalyst;
• adding the at least one catalyst to the organic liquid to form a rearrangement mass, wherein the rearrangement mass comprises caprolactam, at least one impurity, and the at least one catalyst;
• and
• heating the rearrangement mass to a temperature of at least about 115° C. for a period of time in order to sulfonate some of the at least one impurity in the rearrangement mass.

A method of producing caprolactam, comprising:

• providing an organic liquid comprising at least one ketoxime;
• providing at least one acid catalyst;
• adding the at least one catalyst to the organic liquid to form a rearrangement mass, wherein the rearrangement mass comprises caprolactam, at least one impurity, and the at least one catalyst;
• and
• heating the rearrangement mass to a temperature above about 115° C. for a period of time in order to break down some of the at least one impurity in the rearrangement mass.