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发明公开
CN109689201A 含有层状双氢氧化物和活性炭的吸附剂 无效 - 撤回

含有层状双氢氧化物和活性炭的吸附剂
摘要：
本发明涉及一种吸附挥发性化合物特别是含硫化合物的材料。已发现适于高挥发性化合物的高表面积的吸附剂可通过在粉末活性炭(PAC)的表面上生长层状双氢氧化物(LDH)的纳米颗粒获得。本发明公开了一种复合吸附剂，其包含通式为[M2+1-xM3+x(OH)2]q+(Xn-)q/n·yH2O的层状双氢氧化物(LDH)的纳米颗粒和粉末活性炭(PAC)，其中，M2+＝Ca2+、Mg2+、Mn2+、Fe2+、Co2+、Ni2+、Cu2+或Zn2+；M3+＝Al3+或Fe3+；x＝[M3+]/[M3++M2+]；q＝x；n＝1至4；和y＝LDH上存在的水分子数；X＝选自卤化物、硫酸盐、硝酸盐、碳酸盐的阴离子或来自有机源的阴离子部分；其中，所述复合材料可通过水热法获得，该水热法依次包括以下步骤：(a)将粉末活性炭与M2+的水溶性盐和M3+的水溶性盐接触和混合；(b)向步骤(a)的分散体中加入碱；(c)通过将步骤(b)的分散体加热至80至100℃以使其老化；(d)通过任何方式分离分散体的水相和分散相；以及(e)用水洗涤所述分散相以除去过量的碱，得到复合吸附剂，其中，所述层状双氢氧化物(LDH)的纳米颗粒的量为10-30重量％，并且其中，所述粉末活性炭的粒径为50μm至500μm。
摘要（英）：

The present invention relates to a material that absorbs volatile compounds, in particular sulphurous compounds. It is found that an absorbent of high surface area suitable for highly volatile compounds can be obtained by growing nanoparticles of a layered double hydroxide (LDH) on the surface of powder activated carbon (PAC). Disclosed is a composite adsorbent comprising nanoparticles of a layered double hydroxide (LDH) and a powder activated carbon (PAC) of the general formula [M2+ 1-xM3+ x (OH)2]q+(Xn-)q/n.yH2O, in which, M2+ = Ca2+, Mg2+, Mn2+, Fe2+, CO2+, Ni2+, Cu2+ or Zn2+; M3+ = Al3+ orFe3+; x = [M3+]/ [M3+ + M2+]; q=x n=1 to 4; and, y is the number of water molecules present on the LDH; X are anions selected from halides, sulphates, nitrates, carbonates or anionic moiety from organic sources wherein said composite is obtainable by a hydrothermal process comprising, in sequence, the steps of: (a) contacting, and mixing, powder activated carbon with a water soluble salt of M2+ and a water soluble salt of M3+; (b) adding an alkali to the dispersion of step (a); (c) aging the dispersion of step (b) by heating it to 80 to 100 DEG C; (d) separating, by any means, the aqueous phase of the dispersion from the dispersed phase; and (e) washing said dispersed phase with water to remove excess alkali, to get the composite adsorbent, wherein amount of nanoparticles of said layereddouble hydroxide (LDH) is 10 to 30% by weight and wherein particle size of said powder activated carbon is 50 [Mu]m to 500 [Mu]m.

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