Method for the purification of (meth)acrylic acid
    1.
    发明授权
    Method for the purification of (meth)acrylic acid 有权
    纯化(甲基)丙烯酸的方法

    公开(公告)号:US07557246B2

    公开(公告)日:2009-07-07

    申请号:US11571877

    申请日:2005-07-15

    IPC分类号: C07C51/42

    CPC分类号: C07C51/43 C07C57/04

    摘要: The present invention relates to a process for production of (meth)acrylic acid, whereby first a crude (meth)acrylic acid is produced and this crude (meth)acrylic acid is then continuously purified, whereby the continuous purification of the crude (meth)acrylic acid comprises the following process steps: a) in a composition comprising (meth)acrylic acid and impurities, precipitating the impurities in crystalline form from the composition; and b) separating the crystalline impurities precipitated from the composition. The invention also relates to the (meth)acrylic acid obtainable by this process, a device for production of (meth)acrylic acid, the use of the device or of a purification device for production of (meth)acrylic acid, (meth)acrylic acid, water-absorbing polymers, the use of water-absorbing polymers as well as fibers, sheets, foams and composites.

    摘要翻译: 本发明涉及一种生产(甲基)丙烯酸的方法,其中首先生产粗(甲基)丙烯酸,然后将该粗(甲基)丙烯酸连续纯化,由此连续纯化粗(甲基)丙烯酸, 丙烯酸包括以下工艺步骤:a)在包含(甲基)丙烯酸和杂质的组合物中,从组合物中沉淀出结晶形式的杂质; 和b)分离从组合物中析出的结晶杂质。 本发明还涉及通过该方法获得的(甲基)丙烯酸,(甲基)丙烯酸的制造装置,使用该装置或纯化装置用于制造(甲基)丙烯酸,(甲基)丙烯酸 吸水聚合物,吸水聚合物以及纤维,片材,泡沫和复合材料的使用。

    Process for production of (meth)acrylic acid with high boiling fraction work-up by means of crystallization
    2.
    发明授权
    Process for production of (meth)acrylic acid with high boiling fraction work-up by means of crystallization 有权
    通过结晶生产高沸点后处理的(甲基)丙烯酸的方法

    公开(公告)号:US08178717B2

    公开(公告)日:2012-05-15

    申请号:US12063949

    申请日:2006-08-11

    IPC分类号: C07C27/00 C07C51/42

    CPC分类号: C08J3/00 C07C51/43 C07C57/04

    摘要: A process for production of (meth)acrylic acid is disclosed. The process includes synthesizing and distillatively working-up a crude (meth)acrylic acid phase to obtain a (meth)acrylic acid phase and a dimer phase including (meth)acrylic acid dimers and/or (meth)acrylic acid oligomers. At least a part of the (meth)acrylic acid dimers and/or of the (meth)acrylic acid oligomers from the dimer phase is split to obtain a (meth)acrylic acid including a low-boiling phase and a high-boiling phase including less (meth)acrylic acid than the low-boiling phase. At least a part of the (meth)acrylic acid from the low-boiling phase is separated by forming of one or more crystals to obtain a pure (meth)acrylic acid and a residue. Also disclosed is a device for production of (meth)acrylic acid, a process for production of a polymer as well as chemical products based on or including (meth)acrylic acid or a polymer as well as the use of (meth)acrylic acid or polymers in chemical products.

    摘要翻译: 公开了(甲基)丙烯酸的生产方法。 该方法包括合成和蒸馏处理粗(甲基)丙烯酸相以获得(甲基)丙烯酸相和包含(甲基)丙烯酸二聚体和/或(甲基)丙烯酸低聚物的二聚体相。 (甲基)丙烯酸二聚体和/或来自二聚体相的(甲基)丙烯酸低聚物的至少一部分被分裂,得到包含低沸点相和高沸点相的(甲基)丙烯酸,包括 (甲基)丙烯酸低于低沸点相。 通过形成一种或多种晶体将至少一部分来自低沸点相的(甲基)丙烯酸分离,得到纯的(甲基)丙烯酸和残余物。 还公开了用于生产(甲基)丙烯酸的装置,聚合物的制造方法以及基于(或)(甲基)丙烯酸或聚合物的化学产品,以及使用(甲基)丙烯酸或 化学产品中的聚合物。

    Superabsorbent polymers and methods of making the same
    3.
    发明授权
    Superabsorbent polymers and methods of making the same 有权
    超吸收性聚合物及其制造方法

    公开(公告)号:US08309668B2

    公开(公告)日:2012-11-13

    申请号:US13461220

    申请日:2012-05-01

    IPC分类号: C08F220/06 C08L33/02

    CPC分类号: C08J3/00 C07C51/43 C07C57/04

    摘要: The present invention relates to a process for producing a superabsorbent a polymer comprises (I) producing a pure (meth)acrylic acid comprising the steps of (a) synthesizing a crude (meth)acrylic acid phase; (b) distillatively working-up the crude (meth)acrylic acid phase to obtain a (meth)acrylic acid phase and a dimer phase comprising (meth)acrylic acid dimers or (meth)acrylic acid oligomers or both; (c) splitting at least a part of the (meth)acrylic acid dimers or of the (meth)acrylic acid oligomers or both from the dimer phase to obtain a (meth)acrylic acid-comprising low boiling phase and a high boiling phase comprising less (meth)acrylic acid than the low boiling phase; (d) separating at least a part of the (meth)acrylic acid from the low boiling phase to obtain a pure (meth)acrylic acid, and a residue; (II) polymerizing a monomer phase comprising the pure (meth)acrylic acid to obtain a polymer phase; and (III) working-up the polymer phase to obtain the polymer.

    摘要翻译: 本发明涉及聚合物的超吸收剂的制造方法,其特征在于:(I)制造纯(甲基)丙烯酸,其特征在于,包括:(a)合成粗制(甲基)丙烯酸相的工序; (b)蒸馏处理粗(甲基)丙烯酸相以获得(甲基)丙烯酸相和包含(甲基)丙烯酸二聚体或(甲基)丙烯酸低聚物或二者的二聚体相; (c)从二聚体相分离至少一部分(甲基)丙烯酸二聚体或(甲基)丙烯酸低聚物或两者,得到包含(甲基)丙烯酸的低沸点相和高沸点相,包括 较少(甲基)丙烯酸低于低沸点相; (d)从低沸点相分离出至少一部分(甲基)丙烯酸,得到纯(甲基)丙烯酸,残渣; (II)使包含纯(甲基)丙烯酸的单体相聚合以获得聚合物相; 和(III)加工聚合物相以获得聚合物。