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target="_blank">離子交換樹脂</a>的活性受哪些因素影響？<div>　　1、樹脂物性因素影響</div><div>　　樹脂催化劑是一種大孔型立體網狀交聯結構的球形顆粒，在其內外表面上都有催化活性中心—磺酸基團，但主要的催化活性中心在樹脂顆粒的內部。適當減小粒徑會減小內擴散的距離，增加反應速度，但粒徑太小會使床層壓力降增大，同時樹脂在催化反應過程中，隨著催化劑粒度的增大，催化反應的轉化率下降。</div><div>　　2、金屬離子的影響</div><div>　　金屬離子進入樹脂床層后將會導致樹脂活性中心破壞，樹脂顏色變深，床層壓降增加，交換容量降低，若裝置整體材質偏低，致使粗苯酚中鐵離子含量較高，進料中鐵離子含量約在3%左右，這對苯酚純化樹脂的活性和使用壽命是及其不利的。</div><div>　　3、樹脂反應溫度的控制</div><div>　　樹脂顆粒耐溫性較差，溫度過高將會導致樹脂官能團流失，從而導致其活性下降，查閱資料得知樹脂反應溫度控制在80～90℃時對其使用壽命是最有利的，在其活性下降時適當提高反應溫度有利于增加其活性。在裝置生產中，若樹脂床進料冷卻器換熱效果差，進料溫度被迫控制在105℃左右，長時間在此溫度下運行會影響樹脂的使用壽命。</div><div>　　4、中和劑有機銨的影響</div><div>　　生產中為除去粗苯酚中的羰基類雜質，精餾過程中需要加入有機胺，且為保證*反應有機胺是微過量加入的，而有機胺呈堿性，堿性物質進入樹脂床中將會破壞樹脂的酸性活性中心，導致其快速失活，因此有機胺的注入量是關鍵，生產中需要根據粗苯酚塔塔釜的樣品分析來調整有機胺的注入量，既要確保反應*，又要使得過量的胺可以從粗苯酚塔塔釜移除出系統。</div> </div> </div> <div class="cl"></div> <div class="ye"> <p>上一篇：<a href="/Article-3156635.html">大孔陽樹脂的優缺點分別是什么呢？</a></p> <p>下一篇：<a href="/Article-3123057.html">大孔離子交換樹脂的離子交換容量有哪些表示方式</a></p> </div> </div> </div> </div> <div class="clearfix"></div>  <div 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