Methods of purifying hydroxlamine solutions and separating hydroxylamine from hydroxlamine salts

A method of separating hydroxylamine from hydroxylammonium salt in a solution comprising hydroxylamine, at least one stabilizer and a hydroxylammonium salt, comprising:

• passing at least a portion of the solution comprising hydroxylamine, at least one stabilizer and the hydroxylammonium salt at a first concentration through a semipermeable membrane under pressure;
• and
• collecting the portion of solution which passed through the membrane, the portion comprising hydroxylamine, at least one stabilizer and the hydroxylammonium salt at a second concentration, wherein the second concentration is less than the first concentration.

A method of purifying a hydroxylamine solution containing impurities, comprising:

• contacting the hydroxylamine solution with a semipermeable membrane under pressure so that at least a portion of the hydroxylamine solution passes through the membrane;
• and
• recovering the portion of the hydroxylamine solution which passed through the membrane, wherein the recovered portion of the hydroxylamine solution contains less impurities than the hydroxylamine solution prior to contact with the semipermeable membrane.