| 摘要 |
<p>Process for treating and regenerating spent aqueous solutions of caustic soda from purification and cleansing of petroliferous products, comprising the following steps in combination: optional deoiling said spent solution of caustic soda; optional initial filtering the resulting solution, optionally deoiled; oxidizing the resulting solution, optionally deoiled and filtered, with ozone in a quantity at least stoichiometric with respect to the pollutants to be removed; final filtering the solution resulting from the ozonizing; and recovering and reusing the solution of caustic soda thus regenerated and clarified, with pH > >14 and with a free caustic soda titer of up to twice that of the starting spent solution of caustic soda. The invention also relates to the regenerated solution of caustic soda obtained with the abovementioned process, and to an apparatus suitable for carrying out such process.</p> |
