Patent ID: 8158075

Claim:
An etching solution reproducing apparatus comprising: a temperature adjuster that adjusts the temperature of taken out waste etching solution; an atomizer that atomizes waste etching solution adjusted in temperature by the temperature adjuster; a precipitator that collects waste etching solution atomized by the atomizer and precipitating silicon compound in the waste etching solution in a precipitating tank; and a separator that separates silicon compound precipitated from the waste etching solution by the precipitator so as to obtain reproduced etching solution, wherein atomizer has a spraying portion which mixes gas supplied at a set flow rate with waste etching solution and sprays atomized waste etching solution, and wherein the temperature adjuster has a circulation passage to adjust the temperature of the waste etching solution while circulation of the waste etching solution is repeated, and the spraying portion mixes the gas supplied with waste etching solution taken out partially from the circulation passage and sprays the atomized waste etching solution in the precipitator tank.