Patents Assigned to Asia Union Electronic Chemical Corporation Shanghai
  • Patent number: 8586788
    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 ?m 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 ?m 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.
    Type: Grant
    Filed: October 28, 2010
    Date of Patent: November 19, 2013
    Assignee: Asia Union Electronic Chemical Corporation Shanghai
    Inventors: Jiarong Zhan, Curtis Dove, I-Hsing Lin