THE METHOD FOR SEPARATING AND COLLECTING SEVERAL ACIDS FROM TWO MORE MIXED WASTE ACIDS AMONG ACETIC ACID, NITRIC ACID AND HYDROFLUORIC ACID

摘要

acetic acid of the present invention , nitric acid, separating each acid from mixed waste acid solution containing two or more of Foshan According to the method for the recovery , the recovery process for each acid extraction step , the cleaning step , with respect to the acetic acid as an organic solvent extractant used in the extraction step consists of the stripping step , while using an alcohol having 4 to 12 carbon atoms , and the nitric acid for uses the amine-based extraction , for hydrofluoric acid using the alcohol or amine-based extractant having 4 to 12 carbon atoms that it provides a further improved solvent extraction method for extracting effect . Also , the extraction step according to the present invention , the cleaning step , stripping step is composed of each of the multi-stage counter-current method allows to further improve the effectiveness of each step .