SUPERABSORBENT POLYMERS AND METHODS OF MAKING THE SAME
    8.
    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:US20130053522A1

    公开(公告)日:2013-02-28

    申请号:US13630302

    申请日:2012-09-28

    IPC分类号: C08F220/28

    摘要: In one aspect, a process for the preparation of a superabsorbent polymer is described herein. In some embodiments, the process comprises (I) preparing acrylic acid, wherein the process comprises (a1) provision of a fluid F1 having a composition comprising from about 5 to about 20 wt. % of hydroxypropionic acid, salts thereof, or mixtures thereof; from about 0.1 to about 5 wt. % of inorganic salts; from about 0.1 to about 30 wt. % of organic compounds which differ from hydroxypropionic acid; from 0 to about 50 wt. % of solids; and from about 20 to about 90 wt. % of water; (a2) dehydration of said hydroxypropionic acid to give a fluid F2 containing acrylic acid; and (a3) purification of said fluid F2 to give a purified acrylic acid phase comprising acrylic acid having a purity of at least 70 wt. %; and (II) polymerizing the acrylic acid of (I) to form a superabsorbent polymer.

    摘要翻译: 一方面,本文描述了制备超吸收性聚合物的方法。 在一些实施方案中,该方法包括(I)制备丙烯酸,其中该方法包括(a1)提供具有包含约5至约20wt。 %的羟基丙酸,其盐或其混合物; 约0.1至约5wt。 %的无机盐; 约0.1至约30wt。 %羟基丙酸不同的有机化合物的%; 0至约50wt。 %的固体; 和约20至约90wt。 %的水; (a2)所述羟基丙酸的脱水,得到含有丙烯酸的流体F2; 和(a3)纯化所述流体F2以得到包含纯度至少为70重量%的丙烯酸的纯化丙烯酸相。 %; 和(II)使(I)的丙烯酸聚合以形成超吸收性聚合物。

    Method for producing and purifying aqueous phases
    9.
    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。