六偏磷酸鈉6種生產工藝哪個比較好呀？-河南東福環?？萍加邢薰?/title> <meta name="keywords" content="六偏磷酸鈉6種生產工藝哪個比較好呀？"> <meta name="description" content="六偏磷酸鈉6種生產工藝哪個比較好呀？目前，六偏磷酸鈉的生產工藝主要有一步法和兩步法，生產規模一般在1 ～ 3 kt/a，具有代表性的是磷酸二氫鈉兩步法生產六偏磷酸鈉的方法。1.兩步法該法又稱為液相中和、干燥(結晶)熔聚法，先將生成的磷酸二氫鈉溶液經濃縮結晶或噴霧干燥脫去游離水分，制成無水磷酸二氫鈉和結晶磷酸二氫鈉，再送..."> <link rel="stylesheet" href="/template/default/index/css/animate.min.css"> <link rel="stylesheet" href="/template/default/index/css/swiper.min.css"> <link rel="stylesheet" href="/template/default/index/css/yunu.css"> <script src="/template/default/index/js/jquery.min.js"></script> <script src="/template/default/index/js/wow.min.js"></script> <script src="/template/default/index/js/swiper.min.js"></script> <script src="/template/default/index/js/yunu.js"></script> <meta http-equiv="Cache-Control" content="no-transform" /> <meta http-equiv="Cache-Control" content="no-siteapp" /> </head> <body> <div style="position:fixed;left:-9000px;top:-9000px;"><menuitem id="zrdnn"></menuitem><form id="zrdnn"><ins 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class="content-body"> <p><a href='http://www.top50usmodels.com' target='_blank' title='六偏磷酸鈉' ><strong>六偏磷酸鈉</strong></a>6種生產工藝哪個比較好呀？</p><p>目前，<a href='http://www.top50usmodels.com' target='_blank' title='六偏磷酸鈉' ><strong>六偏磷酸鈉</strong></a>的生產工藝主要有一步法和兩步法，生產規模一般在1 ～ 3 kt/a，具有代表性的是<a href='http://www.top50usmodels.com' target='_blank' title='磷酸二氫鈉' ><strong>磷酸二氫鈉</strong></a>兩步法生產<a href='http://www.top50usmodels.com' target='_blank' title='六偏磷酸鈉' ><strong>六偏磷酸鈉</strong></a>的方法。</p><p>1.兩步法</p><p>該法又稱為液相中和、干燥(結晶)熔聚法，先將生成的<a href='http://www.top50usmodels.com' target='_blank' title='磷酸二氫鈉' ><strong>磷酸二氫鈉</strong></a>溶液經濃縮結晶或噴霧干燥脫去游離水分，制成無水<a href='http://www.top50usmodels.com' target='_blank' title='磷酸二氫鈉' ><strong>磷酸二氫鈉</strong></a>和結晶<a href='http://www.top50usmodels.com' target='_blank' title='磷酸二氫鈉' ><strong>磷酸二氫鈉</strong></a>，再送入熔聚爐進行脫水熔聚，制成<a href='http://www.top50usmodels.com' target='_blank' title='六偏磷酸鈉' ><strong>六偏磷酸鈉</strong></a>。此法能準確控制Na2O與P2O5的分子比，所以可以制得穩定的具有一定鏈長的六偏磷酸鈉。由于進入熔聚爐的是無水磷酸二氫鈉或結晶磷酸二氫鈉，因此進入爐內的水分較少，可大大減少熔料表面的水蒸氣分壓和物料中的水分，從而使物料在較短時間內制得聚合度較高的產品。此法熔體出爐后，用連續式雙輥內冷卻驟冷機冷卻，冷卻效果好，能保證產品不結晶化而成玻璃狀，并且為連續生產，生產能力大，勞動強度低。由于物料在密閉反應器和管道內反應運輸，因此勞動環境衛生條件好。具體生產中又分為以下幾種方法。</p><p>1）磷酸二氫鈉法</p><p>首先用黃磷為原料制取熱法磷酸，再以燒堿作中和劑制得磷酸二氫鈉。先將磷酸二氫鈉進行噴霧干燥脫水，得到磷酸二氫鈉干粉。再將此干粉在石墨坩堝中加熱，進行高溫聚合，然后用不銹鋼匙取出，在冷卻圓盤中驟冷，即得片狀偏磷酸鈉，經粉碎可得粉狀六偏磷酸鈉產品。該法具有物料比易于控制、可連續生產、勞動強度低等優點。</p><p>2）磷鐵法</p><p>磷鐵法以電爐黃磷副產磷鐵為原料，經破碎及磨細后，與純堿混合進行焙燒，其生成物為燒結態固體。其中含有可熔性磷酸三鈉，以熱水浸出得磷酸三鈉溶液，經過濾除去不溶性雜質。凈化后的磷酸三鈉液經中和制得<a href='http://www.top50usmodels.com' target='_blank' title='磷酸氫二鈉' ><strong>磷酸氫二鈉</strong></a>。<a href='http://www.top50usmodels.com' target='_blank' title='磷酸氫二鈉' ><strong>磷酸氫二鈉</strong></a>溶液經真空濃縮、結晶除去可溶性雜質，再進一步中和制得磷酸二氫鈉溶液。磷酸二氫鈉溶液經噴霧干燥制成無水一鈉，再經脫水聚合即生成六偏磷酸鈉。該流程缺點為工序多、流程長、燃料及動力消耗較高。</p><p>3）磷酸與水玻璃法</p><p>利用磷酸與水玻璃中和反應制備白炭黑，再利用生產白炭黑的廢液經過多次過濾、調節pH、擴容蒸發、聚合反應、對輥冷卻、破碎、篩分得到成品六偏磷酸鈉。該方法利用磷酸與水玻璃同時制備白炭黑和六偏磷酸鈉兩種產品，達到了廢液利用，降低生產成本，保護生態環境等多種有益效果。</p><p>4）磷酸與食鹽法</p><p>研究磷酸與食鹽縮聚反應，反應方程式如下：</p><p><img src="/uploads/image/20210209/1612855658651284.png" style="max-width: 100%; height: auto; max-height: 3000px;"/></p><p>用磷酸與食鹽縮聚反應制取六偏磷酸鈉，不僅可以節省純堿和燒堿，回收副產的鹽酸，也可用于分解磷礦和其他用途。</p><p>2.一步法</p><p>六偏磷酸鈉一步法工藝是以液體黃磷為原料，經氧化直接與純堿在高溫下化合、聚合，所制得熔融六偏磷酸鈉于爐缸直接流入冷卻圓盤中驟冷，即得六偏磷酸鈉。該法也稱為固相反應、坩堝熔聚法，此法將黃磷加熱熔融后，送入氧化燃燒爐中，用干燥空氣中的氧進行氧化燃燒反應，生成中間產物五氧化二磷。再將五氧化二磷與純堿混合后，經高溫聚合反應，驟冷制片狀即得片狀六偏磷酸鈉，經粉碎可得六偏磷酸鈉。該工藝具有工序少、流程短、可連續式生產等特點，黃磷燃燒的熱能可為六偏磷酸鈉提供生產過程中干燥及聚合過程中所需的熱源，能有效地節約能源。但該工藝生產控制困難，不能保證穩定的六偏磷酸鈉產品質量。</p><p><br/></p> </div> <ul class="content-exp"> <li><span>上一篇：</span><a href="http://www.top50usmodels.com/news/hydt/302.html">選礦行業油田行業六偏磷酸鈉抑制劑價格</a></li> <li><span>下一篇：</span><a 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