| 摘要 |
The present invention relates to a method for regenerating a ceria-based abrasive from a polishing waste comprising a ceria-based abrasive, frit glass, a polishing pad and an inorganic coagulant, comprising the following steps: adding a solution of an organic acid which does not form salt by reaction with the ceria-based abrasive, and the polishing waste to a reaction tank and stirring the obtained mixture to convert the inorganic coagulant into ion species by acid treatment with the organic acid and to float the frit glass and the polishing pad;removing the floated frit glass and polishing pad; and washing and drying the obtained product to obtain a ceria-based abrasive, wherein the pH of the organic acid is 0.5-6.0. According to the present invention, it is possible regenerate an environmentally friendly ceria-based abrasive from a polishing waste and to obtain a high purity ceria-based abrasive, and a very high yield. |
