- 专利标题: Process for the production of (meth)acrylic acid and derivatives and polymers produced therefrom
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申请号: US14700651申请日: 2015-04-30
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公开(公告)号: US09890103B2公开(公告)日: 2018-02-13
- 发明人: David William Johnson , Graham Ronald Eastham , Martyn Poliakoff , Thomas Andrew Huddle
- 申请人: Lucite International UK Limited
- 申请人地址: GB Southampton
- 专利权人: LUCITE INTERNATIONAL UK LIMITED
- 当前专利权人: LUCITE INTERNATIONAL UK LIMITED
- 当前专利权人地址: GB Southampton
- 代理机构: Venable LLP
- 代理商 Keith G. Haddaway; Annette K. Kwok
- 优先权: GB1102249.8 20110209; GB1110741.4 20110624
- 主分类号: C07C69/00
- IPC分类号: C07C69/00 ; C07C51/48 ; C07C51/38 ; C08F20/06 ; C08F20/02
摘要:
A method of extracting (meth)acrylic acid from an aqueous reaction medium into an organic phase in contact therewith is described. The aqueous reaction medium is formed from at least one base catalyst and at least one dicarboxylic acid selected from maleic, fumaric, malic, itaconic, citraconic, mesaconic, and citramalic acid or mixtures thereof in aqueous solution and contains the base catalyzed decarboxylation products of the base catalyzed reaction. The method includes either the addition of at least one of the said dicarboxylic acids and/or a pre-cursor thereof to the aqueous reaction medium to enhance the solvent extraction of the (meth)acrylic acid into the organic solvent or maintaining the level of base catalyst to dicarboxylic acid and/or pre-cursor at a sub-stoichiometric level during the extraction process. The method extends to a process of producing (meth)acrylic acid, its esters and polymers and copolymers thereof.