1. <source id="dsn7r"></source>
    <b id="dsn7r"><td id="dsn7r"><output id="dsn7r"></output></td></b>

    1. 歡迎您進入天津市正源昊業化工科技有限公司官方網站

      收藏網站  |  免費拿樣  |  分子篩網站地圖

      專業專注、用心服務
      免費咨詢熱線:13832635093

      聯系我們

      天津市正源昊業化工科技有限公司

      地址:中國 天津市京濱工業區

      電話:0316-5708792

      手機:13832635093
      18222802100

      郵箱:2539274846

      QQ:2539274846

      行業動態
      當前位置:網站首頁  >> 新聞動態  >> 行業動態  >> 查看詳情

      分子篩,一種多孔固體

      瀏覽次數:次      更新時間:2021-01-19 11:36:10

      分子篩,一種多孔固體,通常是合成或天然沸石,用于分離分子尺寸的顆粒。沸石是水合金屬鋁硅酸鹽化合物,具有明確的晶體結構。硅酸鹽和鋁酸鹽群在空腔周圍形成三維晶格,金屬離子和水分子松散地固定在空腔中。通道貫穿整個晶體,將腔相互連接,并在晶體表面終止。加熱后,沸石失去水分,其晶體結構幾乎沒有變化。脫水沸石可以可逆地吸收水或其他小到足以通過通道或孔隙的分子。金屬離子也很容易被其他電荷和大小相似的離子單元所取代。
      分子篩用于干燥氣體和液體,并根據分子的大小和形狀分離分子。當兩個分子同樣小并且可以進入孔隙時,分離是基于分子的極性(電荷分離),更極性的分子優先被吸附。比較凝膠色譜法。
      Molecular sieve, a porous solid, usually a synthetic or a natural zeolite, that separates particles of molecular dimension. Zeolites are hydrated metal aluminosilicate compounds with well-defined crystalline structures. The silicate and aluminate groupings form three-dimensional crystal lattices surrounding cavities in which the metal ions and the water molecules are loosely held. Channels run through the entire crystal, interconnecting the cavities and terminating at the crystal surface. Upon heating, the zeolites lose their water content with little or no change in their crystal structure. The dehydrated zeolite can reversibly absorb water or other molecules that are small enough to pass through the channels or pores. The metal ions are also readily replaceable by other ionic units of similar charge and size.
      Molecular sieves are used for drying gases and liquids and for separating molecules on the basis of their sizes and shapes. When two molecules are equally small and can enter the pores, separation is based on the polarity (charge separation) of the molecule, the more polar molecule being preferentially adsorbed. Compare gel chromatography.

      上一篇:分子篩市場推測

      下一篇:4A分子篩干燥劑連續使用有效次數試驗

      在線客服
      熱線電話
      13832635093

      微信掃一掃
      日韩中文字幕日本有码|5566成年网站-色猫咪AV网站-国产酒店揄拍视频在线观看|男人的天堂Av高清在线|在线综合亚洲欧美不卡网站