Method for purifying an aqueous patassium hydroxide solution having rich silicon impurities
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United States of America Patent
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Aug 2, 2011
Grant Date -
Feb 11, 2010
app pub date -
Dec 19, 2008
filing date -
Aug 7, 2008
priority date (Note) -
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status (Latency Note)
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Abstract
A method for purifying an aqueous potassium hydroxide solution having rich silicon impurities has been disclosed in the invention, which is particularly related to a method that utilizes a low-carbon alcohol (such as ethanol) for extracting said aqueous potassium hydroxide solution, and includes the steps of mixing a low-carbon alcohol with an aqueous potassium hydroxide solution having rich silicon impurities; allowing the resulting mixture therefrom to divide into an aqueous phase layer and a low-carbon alcohol phase layer that contains the aqueous potassium hydroxide solution with reduced silicon impurities, and subjecting the low-carbon alcohol phase layer to a separation process for removing the low-carbon alcohol, thereby resulting in an aqueous potassium hydroxide solution having reduced silicon impurities.
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International Classification(s)
- 2008 Application Filing Year
- C07C Class
- 2518 Applications Filed
- 1329 Patents Issued To-Date
- 52.78 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 1 Citation Count
- C07C Class
- 22.95 % this patent is cited more than
- 14 Age
