Heat-stable anion exchangers
    54.
    发明授权
    Heat-stable anion exchangers 有权
    热稳定阴离子交换剂

    公开(公告)号:US07754084B2

    公开(公告)日:2010-07-13

    申请号:US11899125

    申请日:2007-09-04

    IPC分类号: C08J9/00

    摘要: The present invention relates to heat-stable anion exchangers based on at least one aromatic monomer and at least one crosslinker having structural elements of the general formula (I) where Ak, Ak′, Ak″ are in each case independently of one another identically or differently a C1-C18-alkyl radical, n is an even number between 5 and 18, x+y=2, where x is equal to 0 or 1, and X is Cl, Br, OH, HCO3, HSO4, ½ (SO4), ½ CO3, NO3, F, H2PO4, ½ HPO4, ⅓ PO4 with the result that these anion exchangers, preferably in the OH form, withstand a working temperature of at least 60° C., preferably of at least 80° C., over a relatively long time, a process for production thereof and also use thereof.

    摘要翻译: 本发明涉及基于至少一种芳族单体和至少一种具有通式(I)结构单元的交联剂的热稳定阴离子交换剂,其中Ak,Ak',Ak“在每种情况下彼此独立地相同或相同 不同的是C 1 -C 18烷基,n是5和18之间的偶数,x + y = 2,其中x等于0或1,X是Cl,Br,OH,HCO 3,HSO 4,½(SO 4 ),½CO 3,NO 3,F,H 2 PO 4,½HPO 4,1 PO 4,结果这些阴离子交换剂优选为OH形式,耐受至少60℃,优选至少80℃的工作温度。 在相当长的时间内,其生产方法及其用途。

    Arsenic-adsorbing ion exchanger
    60.
    发明申请
    Arsenic-adsorbing ion exchanger 审中-公开
    砷吸附离子交换器

    公开(公告)号:US20060173083A1

    公开(公告)日:2006-08-03

    申请号:US11299098

    申请日:2005-12-08

    IPC分类号: C08J5/20

    摘要: The present invention relates to a method for producing iron oxide/iron oxyhydroxide-containing carboxyl-bearing ion exchangers, which is characterized in that a) a bead-type carboxyl-containing ion exchanger is contacted in aqueous suspension with iron(III) salts or a′) an aminomethylated crosslinked polystyrene bead polymer is contacted in aqueous suspension with iron(III) salts and with chloroacetic acid and b) the suspensions obtained from stages a) or a′) are adjusted to pHs in the range from 3 to 14 by adding alkali metal hydroxides or alkaline earth metal hydroxides and the resultant iron oxide/iron oxyhydroxide-containing ion exchangers are isolated by known methods, to the ion exchangers themselves their, and also to their use for the adsorption of heavy metals, in particular arsenic.

    摘要翻译: 本发明涉及一种生产含氧化铁/含羟基氧化铁的含羧基离子交换剂的方法,其特征在于a)使珠粒含羧基的离子交换剂在含水悬浮液中与铁(III)盐或 a')氨基甲基化交联的聚苯乙烯珠聚合物在水悬浮液中与铁(III)盐和氯乙酸接触,和b)将从a)或a')得到的悬浮液通过以下步骤调节至3至14的pH: 加入碱金属氢氧化物或碱土金属氢氧化物,所得到的含氧化铁/含羟基氧化铁的离子交换剂通过已知方法分离到离子交换剂本身,也用于其用于吸附重金属,特别是砷。