PREPARATION OF METHACRYLIC ACID
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United States of America Patent
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Issued Date -
Jul 3, 2014
app pub date -
Sep 16, 2011
filing date -
Sep 16, 2011
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Abandoned
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Abstract
The invention relates to a process for preparation of methacrylic acid, comprising process steps a) providing a crude methacrylic acid-comprising aqueous solution comprising at least one impurity at least partially dissolved therein; b) precipitation of at least a part of the at least one impurity from the crude methacrylic acid-comprising aqueous solution to form at least one solid impurity and a mother liquor; c) separation of at least a part of the at least one solid impurity from the mother liquor to obtain a purified methacrylic acid-comprising aqueous solution and a solid impurity; d) separation of methacrylic acid from the purified methacrylic acid-comprising aqueous solution.
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