Process for producing ammonium salts

A process for treating an off gas stream from a potassium acesulfame production process, comprising the steps of

• (a) forming the off gas stream comprising a first amount of ammonia and a first amount of methylene dichloride;
• (b) treating the off gas stream with an acid to form a treated off gas stream comprising a reduced amount of ammonia;
• and
• (c) contacting the treated off gas stream with an adsorbent to form a methylene dichloride stream comprising methylene dichloride and at least a portion of the adsorbent.

A process for producing an ammonium salt composition, comprising the steps of:

• (a) providing a process stream comprising sulfuric acid, methylene dichloride, water, and a tertiary amine;
• (b) contacting the process stream with ammonia under conditions effective to form a product stream comprising the ammonium salt and a waste stream comprising ammonia, water, the tertiary amine, and the methylene dichloride,
• (c) deriving from the waste stream an off gas stream comprising a preliminary amount of ammonia and methylene dichloride;
• (d) contacting the off gas stream with an acid under conditions effective to form an ammonium salt residue stream comprising ammonium salt and an overhead stream comprising methylene dichloride and a reduced amount of ammonia as compared to the preliminary amount;
• and
• (e) contacting the overhead stream from step (d) with an adsorbent under conditions effective to form a methylene dichloride stream and a discard stream comprising air.