| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for producing high-purity electronic grade acetic acid. <P>SOLUTION: The method for producing high-purity electronic grade acetic acid includes following steps: a step 1 of fast distilling industrial acetic acid; a step 2 of filtering the fraction by membrane of 0.05-0.3 μm aperture; a step 3 of rectificating the resulting material; a step 4 of membrane filtrating it again. Due to the adoption of the technical scheme above, the high-purity electronic grade acetic acid whose purity is 99.8% is produced. The content of single metal ion is lower than 1 ppb and the content of particulates which is ≥0.5 μm is lower than 5 pcs/ml. The method will help to reduce energy consumption, to simplify the operation, and to achieve high security. <P>COPYRIGHT: (C)2012,JPO&INPIT |
