METHOD FOR NEUTRALIZING AN ALKALINE SOLUTION OF AN ORGANIC RESIN

摘要

The use of aluminum sulfate to neutralize alkaline solutions yields a gelatinous precipitate. When neutralization of the solution causes other materials to precipitate along with the gel, filtration of the precipitated materials is very difficult because of the gel. When the combination of magnesium sulfate and aluminum sulfate is used as the neutralizing agent for an alkaline stripper solution of a photoresin, the voluminous sludge may be filtered quickly.