Method for producing of ultra-clean and high-purity electronic grade acetic acid
AssigneeAsia Union Electronic Chemical Corporation Shanghai
InventorsJiarong ZHAN, Li Zhou
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Abstract
A method for producing of ultra-clean and high-purity electronic acetic acid is disclosed. The method including following steps: Step 1, industrial acetic acid is fast distilled; Step 2, filtering the fraction by membrane of 0.05˜0.3 μm aperture; Step 3, rectification; Step 4, membrane filtration again. Due to the adoption of the technical scheme above, the ultra-clean and high-purity electronic grade acetic acid which 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 of the invention will help to reduce energy consumption, to simplify the operation, and to achieve the high security.
Claims10
A method for producing of ultra-clean and high-purity electronic grade acetic acid characterizes that the method includes following steps:
- Step 1, distilling the industrial acetic acid fast, and collect the fraction with the rate of ≧20 L/min;
- Step 2, filtering the fraction collected in step 1 through a membrane of 0.05˜0.3 μm aperture;
- Step 3, rectifying the colature and collecting the fraction;
- Step 4, filtering the fraction collected in step 3 through a membrane of 0.05˜0.3 μm aperture, and collecting the colature to get the production.
Dependencies are inferred from the claim text.