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class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624016490617/6540095.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="qul2kbs" 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>麗水2-甲基四氫呋喃哪家好,2-甲基四氫呋喃</p><p><span>***更新：</span>2020-11-01 08:26:40</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="xh27c3u" 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="q2kmjln" class="page-proshow02"><p class="title">詳細說明</p><div id="gvnzlmt" class="box"><p><p style="text-indent:25px">THF自身可縮聚（經(jīng)陽離子引發(fā)開環(huán)再聚合）成聚四亞甲基醚二醇（PTMEG），也稱四氫呋喃均聚醚。PTMEG與甲苯二異氰酸酯（TDI）制成耐磨、耐油、低溫性能好、強度高的特種橡膠；與對苯二甲酸二甲酯和1,4-丁二醇制成嵌段聚醚聚酯彈性Chemicalbook材料，麗水2-甲基四氫呋喃哪家好。相對分子質(zhì)量為2000的PTMEG與對亞甲基雙（4-苯基）二異氰酸酯（MDI）制成聚氨酯彈性纖維（氨綸，麗水2-甲基四氫呋喃哪家好，即SPANDEX纖維）、特種橡膠和一些特殊用途涂料的原料。在有機合成方面，麗水2-甲基四氫呋喃哪家好，用于生產(chǎn)四氫噻吩、1.4-二氯乙烷、2.3-二氯四氫呋喃、戊內(nèi)酯、丁內(nèi)酯和吡咯烷酮等。在醫(yī)藥工業(yè)方面，THF用于合成咳必清、利復霉素、黃體酮和一些藥。THF經(jīng)硫化氫處理生成四氫硫酚，可作燃料氣中的臭味劑（識別添加劑）。THF還可用做合成革的表面處理劑。四氫呋喃是制藥行業(yè)的主要溶屬劑。麗水2-甲基四氫呋喃哪家好</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="麗水2-甲基四氫呋喃哪家好,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624016490617/6540095.png"></div><p style="text-indent:25px">幾種溶解性能良好的化工溶劑,被稱為都能溶劑.二甲基亞砜普遍用作溶劑和反應試劑,特別是丙烯腈聚合反應中作加工溶劑和抽絲溶劑,作聚氨酯合成及抽絲溶劑,作聚酰胺,聚酰亞胺和聚砜樹脂的合成溶劑,以及芳烴,丁二烯抽提溶劑和合成氯氟苯胺的溶劑等.四氫呋喃具有低毒、低沸點、流動性好等特點,是一種重要的有機合成原料和優(yōu)良的溶劑,具有普遍的用途,四氫呋喃對許多有機物有良好的溶解性,它能溶解除聚乙烯,聚丙烯及氟樹脂以外的所有有機化合物,特別是對聚氯乙烯,聚偏氯乙烯,和叮苯胺有良好的溶解作用,有都能溶劑之稱。宿遷2-甲基四氫呋喃價格四氫呋喃是一種常用的中等極性非質(zhì)子性溶劑。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="麗水2-甲基四氫呋喃哪家好,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624027184007/8887733.png"></div><p style="text-indent:25px">利用微生物還原汞的功能,可使金屬汞沉淀回收,揮發(fā)的汞可用活性炭吸附。微生物除汞方法主要有選育高效抗汞微生物處理含汞廢水：如應用選育的高效抗汞菌，假單胞桿菌 K62可處理含甲基汞、乙基汞、**、乙酸汞、硫酸汞、氧化汞和**等廢水，金屬汞回收率達80%以上，菌體能重復用三次。采用除汞：依靠活性污泥中的抗汞菌將汞還原為金屬汞，活性污泥系統(tǒng)本身還可吸附汞。采用濾池法除汞：用馴化活性污泥掛膜處理生化需氧量 (BOD)低的含汞廢水。使用硫化氫沉淀汞：借助于其他微生物產(chǎn)生的硫化氫與水溶性汞結(jié)合成硫化汞，硫化汞溶度積很小，可以在沉淀后除去。</p><p style="text-indent:25px">與游離基的反應呋喃可以和親電的碳游離基反應得到2-烷基取代的呋喃。在Pd催化下，帶有吸電子基團的溴化物與可以呋喃直接偶合。有機金屬化合物呋喃鋰鹽在有機合成中普遍使用。金屬取代的呋喃可以與很多的親電試劑發(fā)生反應，而且2-鋰代呋喃也可以發(fā)生金屬的轉(zhuǎn)移反應。2-取代呋喃的高價銅酸鹽可以在低溫下與酮發(fā)生共軛加成反應。烯的環(huán)加成光照下羰基化合物與呋喃[2+2]環(huán)加成生成環(huán)醚后，用酸處理可得到3-取代呋喃。呋喃與氰氧化物會發(fā)生[2+3]環(huán)加成，可用來合成多羥基胺類化合物。二烯的環(huán)加成呋喃以二烯的形式參與Diels-Alder反應是呋喃在有機合成中較普遍的應用，提供了很多碳碳鍵的形成方法并可用于后續(xù)的合成。但是由于呋喃本身的芳香性，Diels-Alder反應速度都很慢。呋喃不僅能與丙二烯化合物發(fā)生Diels-Alder反應得到選擇性的產(chǎn)物，而且還能和乙炔類化合物反應。呋喃和不同芳香烯的反應是合成多烯化合物的一種很好方法。四氫呋喃常含有少量水分及過氧化物。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="麗水2-甲基四氫呋喃哪家好,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624080435939/3968180.png"></div><p style="text-indent:25px">呋喃是很好的富電芳香雜環(huán)，可與金屬形成金屬有機化合物參與反應，可發(fā)生[2+2]光反應、[2+3]環(huán)加成、[4+3]環(huán)加成和Diels-Alder反應，也可以發(fā)生卡賓反應。2-鹵代、?；⑶杌?、磺酰基和羰基呋喃的合成呋喃作為富電的芳香雜環(huán)可以與很多的親電試劑發(fā)生反應，用以制備鹵代呋喃、酰基呋喃、氰代呋喃和其它雜原子取代呋喃等產(chǎn)物 (式1)。一般情況下C-2位比C-3位更容易受親電試劑的進攻。烷基呋喃的合成烷基呋喃可由呋喃經(jīng)過親電取代反應制得。呋喃發(fā)生Mannich反應可生成2-(N,N-二烷基氨基)甲基呋喃衍生物，TMSI存在下呋喃也可以與β-酮發(fā)生反應。而在Ag+催化下，1,3-二苯基硒丙烷 (式2) 或者氯代環(huán)丙烷可與呋喃發(fā)生烯丙基化。四氫呋喃是芳香族化合物呋喃的完全氫化產(chǎn)物。麗水2-甲基四氫呋喃哪家好</p><p style="text-indent:25px">甲基常出現(xiàn)在各種有機化合物中。麗水2-甲基四氫呋喃哪家好</p><p style="text-indent:25px">聚四氫呋喃生產(chǎn)過程中分子量控制的影響因素，聚合反應工序，在這一關鍵步驟中，THF、**(ACAN)、和醋酸(HAC) 被連續(xù)加入聚合反應器中反應生成PTMEA，聚合轉(zhuǎn)化率通常約28%～30%。聚合產(chǎn)品PTMEA 的聚合分子量由**/四氫呋喃比率(ACAN/THF)與及THF 循環(huán)回路系統(tǒng)中醋酸的含量所控制。然后，通過THF 分離塔、醋酸汽提塔對PTMEA 分離提純。反應器產(chǎn)品物料中有未反應的THF、ACAN、及HAC返回至反應器循環(huán)再使用。催化劑截留其中，同時將產(chǎn)品及其反應熱移出。甲醇化處理之目的是將PTMEA 轉(zhuǎn)化為PTMEG，這一轉(zhuǎn)化是經(jīng)與甲醇反應通過酯-醇交換實現(xiàn)的。PTMEA、甲醇、和甲醇鈉被加入反應精餾塔中，產(chǎn)物PTMEG及一些殘余甲醇和甲醇鈉在反應精餾塔塔底提出，通過甲醇閃蒸塔、甲醇分離塔將甲醇分離除去。反應精餾塔塔頂物料含甲醇和醋酸甲酯，通過共沸精餾塔將醋酸甲酯和甲醇分離，醋酸甲酯回收作副產(chǎn)品出售，甲醇返回到循環(huán)甲醇貯槽。麗水2-甲基四氫呋喃哪家好</p><p style="text-indent:25px">上海蔚云化工有限公司致力于化工，是一家貿(mào)易型的公司。公司業(yè)務涵蓋環(huán)戊酮，甲基異丙基酮，丙二胺，二甘醇胺等，價格合理，品質(zhì)有保證。公司將不斷增強企業(yè)重點競爭力，努力學習行業(yè)知識，遵守行業(yè)規(guī)范，植根于化工行業(yè)的發(fā)展。在社會各界的鼎力支持下，持續(xù)創(chuàng)新，不斷鑄造***服務體驗，為客戶成功提供堅實有力的支持。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/1800716.html</p></div></div></div></div></div><div id="39c8xjg" class="page-right twoColRt"><div id="ujqnk8d" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="wulne8a" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" alt="福建ZF配件哪家強信息推薦自業(yè)物資供應" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></div><p>福建ZF配件哪家強信息推薦自業(yè)物資供應</p></a></div><div id="297tyfm" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/846569.html"><div><img 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