Cleaving Of Oligomeric (Meth) Acrylic Acid In A Liquid Phase Under Pressure
    2.
    发明申请
    Cleaving Of Oligomeric (Meth) Acrylic Acid In A Liquid Phase Under Pressure 审中-公开
    在压力下在液相中裂解低聚(甲基)丙烯酸

    公开(公告)号:US20070280866A1

    公开(公告)日:2007-12-06

    申请号:US10589775

    申请日:2005-02-18

    摘要: The present invention relates to a process for cleaving a (meth)acrylic acid oligomer of structure I wherein R1 is a hydrogen atom or a C1 to C10 alkyl groups, R2 is a hydrogen atom or a methyl group, and n is a whole number within the range between 1 and 200, optionally in the presence of a cleaving agent of the structure R3—OH or of the structure (R4)2—N—H, whereby R3 is a hydrogen atom, a C1 to C12 alkyl group, or a —CxH2x—OH— group, whereby x is a whole number within a range from 1 to 12, and R4 is a hydrogen atom or a C1 to C12 alkyl group, with the proviso that not both R4 groups are hydrogen atoms, whereby the (meth)acrylic acid oligomers are heated with the cleaving agent to a temperature of at least 50° C. at a pressure of at least 1 bar. The present invention also relates to the use of water, optionally with a protic compound as cleaving agent for cleaving (meth)acrylic acid oligomers, a device for (meth)acrylic acid synthesis, the use of this device for production of (meth)acrylic acid, as well as (meth)acrylic acid which has been produced using this device.

    摘要翻译: 本发明涉及一种用于切割结构I的(甲基)丙烯酸低聚物的方法,其中R 1是氢原子或C 1至C 10 烷基,R 2是氢原子或甲基,n是整数在1和200之间的范围内,任选地在存在结构的裂解剂的情况下 R 3 -OH或结构(R 4 S)2 -NH,其中R 3是氢 原子,C 1至C 12烷基或-C 2 H 2 H 2 -OH基团 ,其中x是在1至12的范围内的整数,R 4是氢原子或C 1至C 12的整数。 烷基,条件是不是两个R 4基团都是氢原子,由此将(甲基)丙烯酸低聚物用裂解剂加热到至少50℃的温度,压力 至少1巴。 本发明还涉及水,任选地含有质子化合物作为裂解(甲基)丙烯酸低聚物的裂解剂的用途,(甲基)丙烯酸合成装置,使用该装置生产(甲基)丙烯酸 酸,以及使用该装置制备的(甲基)丙烯酸。

    Method for the Purification of (Meth) Acrylic Acid
    5.
    发明申请
    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:US20080091048A1

    公开(公告)日:2008-04-17

    申请号:US11571877

    申请日:2005-07-15

    IPC分类号: C07C51/43 C07C57/04 B01J19/00

    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。

    SUPERABSORBENT POLYMERS AND METHODS OF MAKING THE SAME
    6.
    发明申请
    SUPERABSORBENT POLYMERS AND METHODS OF MAKING THE SAME 有权
    超吸收聚合物及其制备方法

    公开(公告)号:US20120226003A1

    公开(公告)日:2012-09-06

    申请号:US13461220

    申请日:2012-05-01

    IPC分类号: C08F2/44 C08F120/06

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

    摘要: In some embodiments, a process for producing 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: 在一些实施方案中,制备聚合物的方法包括(I)制备纯(甲基)丙烯酸,其包括以下步骤:(a)合成粗(甲基)丙烯酸相; (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。

    Superabsorbent polymers and methods of making the same
    7.
    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:US08445617B2

    公开(公告)日:2013-05-21

    申请号:US13668899

    申请日:2012-11-05

    IPC分类号: C08F220/06 C08L33/02

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

    摘要: The invention relates to producing a superabsorbent polymer comprising (I) producing a (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 and/or (meth)acrylic acid oligomers; (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 a 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 by forming crystals 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: 本发明涉及制备超吸收性聚合物,其包括(I)生产(甲基)丙烯酸,其包括以下步骤:(a)合成粗制(甲基)丙烯酸相; (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)丙烯酸二聚体和/或(甲基)丙烯酸低聚物的二聚体相; (c)从二聚体相分解至少一部分(甲基)丙烯酸二聚体或(甲基)丙烯酸低聚物或两者,得到包含低沸点相和高沸点相的(甲基)丙烯酸 包括比低沸点相少的(甲基)丙烯酸; (d)通过形成晶体从低沸点相分离出至少一部分(甲基)丙烯酸,得到纯的(甲基)丙烯酸和残余物; (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。

    Process for Production of (Meth)Acrylic Acid with High Boiling Fraction Work-Up By Means of Crystallization
    8.
    发明申请
    Process for Production of (Meth)Acrylic Acid with High Boiling Fraction Work-Up By Means of Crystallization 有权
    通过结晶法生产具有高沸点馏分的(甲基)丙烯酸的方法

    公开(公告)号:US20080287616A1

    公开(公告)日:2008-11-20

    申请号:US12063949

    申请日:2006-08-11

    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。

    Method for producing and purifying aqueous phases
    10.
    发明授权
    Method for producing and purifying aqueous phases 有权
    水相生产和纯化方法

    公开(公告)号:US08362299B2

    公开(公告)日:2013-01-29

    申请号:US12921527

    申请日:2009-03-11

    IPC分类号: C07C51/42 C07C57/04

    CPC分类号: C07B63/00 C07C51/43 C07C57/04

    摘要: The present invention relates to a method for purifying an unpurified phase, containing a target product, preferably (meth)acrylic acid, water, and at least one impurity differing from the target product and from water comprising: a) crystallizing the target product and water; b) separating the crystals from the mother liquor created in step a); c) melting at least part of the separated crystals to form a melt; and d) recycling at least part of said melt to step b). The invention further relates to a method for the production of a purified phase, containing a target product and water, a method for the production of a polymer based on (meth)acrylic acid, polymers that may be obtained by means of said method, chemical products, such as fibers or molded bodies, and the use of polymers.

    摘要翻译: 本发明涉及一种纯化非纯化相的方法,其含有目标产物,优选(甲基)丙烯酸,水和至少一种与目标产物和水不同的杂质,其包括:a)使目标产物和水结晶 ; b)将晶体与步骤a)中产生的母液分离; c)熔化至少部分分离的晶体以形成熔体; 和d)将至少部分所述熔体再循环到步骤b)。 本发明还涉及制备含有目标产物和水的纯化相的方法,制备基于(甲基)丙烯酸的聚合物的方法,可以通过所述方法获得的聚合物,化学 产品,如纤维或成型体,以及聚合物的使用。