PROCESS FOR MANUFACTURING ACRYLIC ACID

To provide a process which allows manufacture of acrylic acid or ester of acrylic acid and lactic acid from a lactic acid oligomer or polymer in high yield in an efficient manner.SOLUTION: The process comprises the steps of: a. bringing a reaction mixture comprising the lactic acid oligomer or polym...

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Bibliographische Detailangaben
Hauptverfasser: GIJSBERT GERRITSEN, JAN VAN KRIEKEN, ELISABETH BOUWMAN, JOS WILTING, FREDERIC G TERRADE, BASTIAAN J V VERKUIJL
Format: Patent
Sprache:eng ; jpn
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Beschreibung
Zusammenfassung:To provide a process which allows manufacture of acrylic acid or ester of acrylic acid and lactic acid from a lactic acid oligomer or polymer in high yield in an efficient manner.SOLUTION: The process comprises the steps of: a. bringing a reaction mixture comprising the lactic acid oligomer or polymer to reaction conditions to form acrylic acid and/or the ester of acrylic acid and lactic acid, the reacting mixture comprising a halide source selected from a bromide source and/or a chloride source and optionally an acid selected from the group of acids with a pKa of at most 2.0 and compounds which under the reaction conditions decompose to form an acid with a pKa of at most 2.0, where the reaction mixture contains less than 1 wt.% of water; and b. keeping the reaction mixture under the reaction conditions for a time sufficient to produce acrylic acid and/or the ester of acrylic acid and lactic acid.SELECTED DRAWING: None 【課題】乳酸オリゴマー又はポリマーからアクリル酸又はアクリル酸と乳酸とのエステルを高収率で効率的に製造できる方法の提供。【解決手段】a.乳酸オリゴマー又はポリマーを含む反応混合物を、アクリル酸及び/又はアクリル酸と乳酸とのエステルを生成する反応条件に付す工程であって、該反応混合物が、ブロミド源及び/又はクロリド源から選択されるハライド源、及び任意成分としてpKa2.0以下の酸及び上記反応条件下で分解してpKa2.0以下の酸を生成する化合物からなる群から選択される酸を含み、該反応混合物の水分含有量が1重量%未満である、上記工程と、b.アクリル酸及び/又はアクリル酸と乳酸とのエステルを生成するのに十分な時間、該反応混合物を上記反応条件下に保つ工程とを含む方法。【選択図】なし