Ammonia → Ammonia

Participants

Reaction Steps

In carrying out the process of this invention, ammonia gas or ammonium hydroxide is added to the solution of 4-acetoxystyrene polymer and heating is conducted at a temperature of about 50° C. to about 150° C. for a time sufficient to hydrolyze the acetoxy groups to phenol groups. Wet carbon dioxide gas is then introduced into the reaction solution as a sparge below the solution surface. During the introduction of carbon dioxide gas, the temperature is held at about 110° C. to about 180° C. The carbon dioxide reacts with the ammonia to form ammonium carbonate which under the influence of heat decomposes to ammonia, carbon dioxide and water, which then can be distilled or sparged out with nitrogen from the reaction solution.

Provenance & Evidence