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href="http://www.cdcfah.com/zh/"><span>展會信息</span></a></li></ul></div></nav><section class="wrap clearfix"><section class="container clearfix tcPro"><section class="home-main container clearfix"><div id="poxz83e" class="twoCol"><div id="cm3nf37" class="page-proshow clearfix"><p class="current"> 當前位置:<a href="http://www.cdcfah.com/">首頁?<a href="http://www.cdcfah.com/cp/">產(chǎn)品供應</a>?<a href="http://www.cdcfah.com/cp/first-_huagong/">化工</a>?<a href="http://www.cdcfah.com/cp/second-_sysqm/">實驗室器皿</a>?<a href="http://www.cdcfah.com/cp/third-sysqm_qtsysyp/">其他實驗室用品</a>?常州2-甲基四氫呋喃排行榜上海蔚云化工供應</p><div id="wfpwlug" class="leftbox clearfix"><h1>常州2-甲基四氫呋喃排行榜上海蔚云化工供應</h1><div id="u888cew" class="proBig"><div id="l84gx8u" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624064664530/9526363.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="yn373ni" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624064664530/9526363.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="b3on8ik" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</span>面議</p><p><span>所在地：</span>上海市</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關鍵詞：</span>常州2-甲基四氫呋喃排行榜,2-甲基四氫呋喃</p><p><span>***更新：</span>2021-01-17 06:14:24</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="dcmdxb7" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">上海蔚云化工有限公司</a></p><p><span>聯(lián)系人：</span>盛志華</p><p><span>郵箱: </span>3273929241@qq.com</p><p><span>電話: </span>18721726651</p><p><span>傳真: </span>021_</p><p><span>網(wǎng)址: </span>http://www.weiyunhuagong.com</p><p><span>手機: </span>021-52909928</p><p><span>地址: </span>靜安區(qū)靈石路709號55幢A2113室</p><p>[當前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="mgnp7by" class="page-proshow02"><p class="title">詳細說明</p><div id="zo2l32a" class="box"><p><p style="text-indent:25px">工藝使用自制的陽離子交換樹脂作為固體酸催化劑，該款樹脂熱穩(wěn)定性高，高溫使用流失少，使用壽命長。反應完成后，常州2-甲基四氫呋喃排行榜，反應液無催化劑殘留，后處理簡單，廢水排放少，環(huán)境友好。該工藝采用了反應精餾的方式，反應過程中產(chǎn)生的水被及時帶出反應體系，促進酯化反應平衡的右移，提高了原料的轉(zhuǎn)化率。該工藝采用了連續(xù)生產(chǎn)的方式，常州2-甲基四氫呋喃排行榜，避免了大量的人工操作，產(chǎn)品質(zhì)量穩(wěn)定，有利于規(guī)?；a(chǎn)，常州2-甲基四氫呋喃排行榜。以自制的固體酸催化合成TFA的工藝路線有較高的工業(yè)應用價值，如能應用于實踐將會產(chǎn)生良好的經(jīng)濟效益和社會效益。四氫呋喃普遍用于表面涂料。常州2-甲基四氫呋喃排行榜</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="常州2-甲基四氫呋喃排行榜,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624064664530/9526363.png"></div><p style="text-indent:25px">四氫呋喃與水能混溶，并常含有少量水分及過氧化物。如要制得無水四氫呋喃，可用氫化鋁鋰在隔絕潮氣下回流（通常1000mL約需2~4g氫化鋁鋰）除去其中的水和過氧化物，然后蒸餾，收集66℃的餾分蒸餾時不要蒸干，將剩余少量殘液即倒出Chemicalbook）。精制后的液體加入鈉絲并應在氮氣氛中保存。處理四氫呋喃時，應先用小量進行試驗，在確定其中只有少量水和過氧化物，作用不致過于激烈時，方可進行純化。四氫呋喃中的過氧化物可用酸化的碘化鉀溶液來檢驗。如過氧化物較多，應另行處理為宜。HF是一種重要的有機合成原料且是性能優(yōu)良的溶劑，特別適用于溶解PVC、聚偏氯乙烯和丁苯胺，普遍用作表面涂料、防腐涂料、印刷油墨、磁帶和薄膜涂料的溶劑，并用作反應溶劑，用于電鍍鋁液時可任意控制鋁層厚度且光亮。臺州2-甲基四氫呋喃什么品牌比較好THF經(jīng)硫化氫處理生成四氫硫酚，可作燃料氣中的臭味劑。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="常州2-甲基四氫呋喃排行榜,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624283199578/5832986.png"></div><p style="text-indent:25px">聚四氫呋喃二醇的工業(yè)化生產(chǎn)工藝根據(jù)催化劑的不同主要有氟磺酸催化聚合工藝、乙酸酐-高氯酯催化聚合工藝和雜多酸催化聚合工藝。其中氟磺酸催化工藝對設備材質(zhì)要求較高，造價昂貴，所需氟磺酸的量大。工業(yè)化的乙酸酐-高氯酸催化工藝，由THF原料經(jīng)二乙酸酯中間體制取PTMEG，副產(chǎn)物為乙酸甲酯和甲醇，生產(chǎn)成本較氟磺酸法低。開發(fā)的雜多酸催化工藝，采用由Mo、W、V的氧化物與磷酸反應制得多聚酸，如十二聚磷鎢酸為催化劑，一步法制得PTMEG，且催化劑為固態(tài)，可回收，是一種新工藝。實驗室制備PTMEG：在反應釜中加入四氫呋喃，溫度降到-5℃以下，于強烈攪拌下滴加發(fā)煙硫酸催化劑，保持反應物料低溫，攪拌下加入定量的水，升溫至70～90℃，蒸出未反應的四氫呋喃單體，經(jīng)靜置分層、中和過渡、抽真空等工序后，制得聚四氫呋喃二醇。</p><p style="text-indent:25px">四氫呋喃可用作溶劑、有機合成的原料。在化學反應和萃取時用做一種中等極性的非質(zhì)子溶劑。四氫呋喃是一種無色、低粘度的液體，具有類似**的氣味。室溫時四氫呋喃與水能部分混溶，部分不法試劑商就是利用這一點對四氫呋喃試劑兌水牟取暴利。四氫呋喃在儲存時容易變成過氧化物。因此，商用的四氫呋喃經(jīng)常是用BHT，即2,6-二叔丁基對甲酚來防止氧化。四氫呋喃可以通過氫氧化鈉置于密封瓶中在暗處保存。四氫呋喃是一種重要的有機化工及精細化工原料，普遍應用于樹脂溶劑(磁帶涂層、PVC表面涂層、清洗PVC反應器、脫除PVC薄膜、玻璃紙涂層、塑料印刷油墨、熱塑性聚氨酯涂層);反應溶劑(格式試劑、烷基堿金屬化合物和芳基堿金屬化合物、氫化鋁和氫化硼、甾族化合物和大分子有機聚合物);化學中間產(chǎn)物;色譜溶劑凝膠滲。四氫呋喃具有低毒、低沸點、流動性好等特點。四氫呋喃是一種重要的有機合成原料且是性能優(yōu)良的溶劑。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="常州2-甲基四氫呋喃排行榜,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389623944439837/8611025.png"></div><p style="text-indent:25px">5-羥甲基糠醛（5-HMF）可以由生物質(zhì)衍生的糖類脫水獲得，進一步完全氫化可以轉(zhuǎn)化為具有高附加值的2，5-二羥甲基四氫呋喃（DHMTHF）。以表面胺基功能化介孔二氧化硅小球（SiO2-NH2）為載體，采用等體積浸漬法制備了高分散釕（Ru）基（Ru-B）納米催化劑（Ru-B/SiO2-NH2）.以2-丁醇為溶劑，將制得的Ru-B/SiO2-NH2用于5-HMF加氫制DHMTHF。在160℃，2.76 MPa，800 r·min-1的條件下，5-HMF轉(zhuǎn)化率為99.9%，DHMTHF的產(chǎn)率為87%.與目前報道的催化劑相比，該催化體系可以在更為溫和的條件下獲得較好的效果.構效關系研究表明：載體表面胺基功能化可以起到錨定和高度分散Ru-B非晶態(tài)合金納米粒子的作用。四氫呋喃在儲存時容易變成過氧化物。常州2-甲基四氫呋喃排行榜</p><p style="text-indent:25px">甲基化的酶促反應是由微生物直接參與進行的。常州2-甲基四氫呋喃排行榜</p><p style="text-indent:25px">聚四亞甲基醚二醇，又稱聚(四氫呋喃)，簡稱PTMEG，是一種重要的高分子材料，用途十分普遍。氨綸工業(yè)PTMEG的主要領域是氨綸工業(yè)。氨綸是一種性能優(yōu)良的彈性纖維，主要用于生產(chǎn)內(nèi)衣、泳衣、運動裝和襪類。彈性體由PTMEG合成的聚氨酯，具有抗水解、耐老化、彈性好、耐磨等優(yōu)點，是特種橡膠的原料，可以用來制作航空軟管、升降機輪胎、工業(yè)膠帶、運動鞋、醫(yī)用假體等。其他領域PTMEG具有強度高、彈性好、耐霉變等優(yōu)點，也可以用于合成革制品、輪胎、傳送帶、建筑涂料和地板，以及防護材料等領域的生產(chǎn)。常州2-甲基四氫呋喃排行榜</p></p><br /><p>文章來源地址: 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