Process for the manufacture of polycarboxylic acids using phosphorous containing reducing agents
    10.
    发明授权
    Process for the manufacture of polycarboxylic acids using phosphorous containing reducing agents 失效
    使用含磷还原剂制造多元羧酸的方法

    公开(公告)号:US07169742B2

    公开(公告)日:2007-01-30

    申请号:US10267296

    申请日:2002-10-09

    IPC分类号: C11D11/00 C11D3/36 C11D3/37

    CPC分类号: C08F20/04

    摘要: A method for the production of polycarboxylic acids is provided via the present invention. The novel method herein comprises the steps of i) mixing a phosphorous containing reducing agent with at least one carboxylic acid monomer to form a reaction mixture; ii) adding an equivalent of base to the reaction mixture to provide a partially neutralized reaction mixture; and iii) adding a free radical generator to the partially neutralized reaction mixture under polymerization conditions to form a phospho/carboxylic acid polymer containing solution. Preferred monomers, reducing agents and free radical generators are also disclosed.

    摘要翻译: 通过本发明提供了制备多元羧酸的方法。 本发明的新方法包括以下步骤:i)将含磷还原剂与至少一种羧酸单体混合以形成反应混合物; ii)向反应混合物中加入等量的碱以提供部分中和的反应混合物; 和iii)在聚合条件下向部分中和的反应混合物中加入自由基发生剂以形成含磷/羧酸聚合物的溶液。 还公开了优选的单体,还原剂和自由基发生剂。