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href="http://m.cdcfah.com/cp/third-sysqm_qtsysyp/">其他實(shí)驗(yàn)室用品</a>?淮安2-甲基四氫呋喃規(guī)格上海蔚云化工供應(yīng)</p><div id="x8jczgi" class="leftbox clearfix"><h1>淮安2-甲基四氫呋喃規(guī)格上海蔚云化工供應(yīng)</h1><div id="7iqcekb" class="proBig"><div id="1ctvhov" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shweiyun/637389623991305064/1986424.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="5bdpr87" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shweiyun/637389623991305064/1986424.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="jiuqhiz" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)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(guān)鍵詞：</span>淮安2-甲基四氫呋喃規(guī)格,2-甲基四氫呋喃</p><p><span>***更新：</span>2020-11-13 07:24:12</p><p><span id="click" >瀏覽次數(shù)：1次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="uikrjqc" 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(jī): </span>021-52909928</p><p><span>地址: </span>靜安區(qū)靈石路709號(hào)55幢A2113室</p><p>[當(dāng)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="dbnulwd" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="xr222wa" class="box"><p><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(lèi)脫水獲得，淮安2-甲基四氫呋喃規(guī)格，進(jìn)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(bào)道的催化劑相比，淮安2-甲基四氫呋喃規(guī)格，淮安2-甲基四氫呋喃規(guī)格，該催化體系可以在更為溫和的條件下獲得較好的效果.構(gòu)效關(guān)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。四氫呋喃是一種常用的中等極性非質(zhì)子性溶劑。淮安2-甲基四氫呋喃規(guī)格</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="淮安2-甲基四氫呋喃規(guī)格,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389623991305064/1986424.png"></div><p style="text-indent:25px">與游離基的反應(yīng) 呋喃可以和親電的碳游離基反應(yīng)得到2-烷基取代的呋喃。在Pd催化下，帶有吸電子基團(tuán)的溴化物與可以呋喃直接偶合。有機(jī)金屬化合物呋喃鋰鹽在有機(jī)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(yīng)，而且2-鋰代呋喃也可以發(fā)生金屬的轉(zhuǎn)移反應(yīng)。2-取代呋喃的高價(jià)銅酸鹽可以在低溫下與酮發(fā)生共軛加成反應(yīng)。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(huì)發(fā)生[2+3]環(huán)加成，可用來(lái)合成多羥基胺類(lèi)化合物。二烯的環(huán)加成呋喃以二烯的形式參與Diels-Alder反應(yīng)是呋喃在有機(jī)合成中較普遍的應(yīng)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(yīng)速度都很慢。呋喃不僅能與丙二烯化合物發(fā)生Diels-Alder反應(yīng)得到選擇性的產(chǎn)物，而且還能和乙炔類(lèi)化合物反應(yīng)。呋喃和不同芳香烯的反應(yīng)是合成多烯化合物的一種很好方法 ?；窗?-甲基四氫呋喃規(guī)格2-甲基四氫呋喃沸點(diǎn)較高。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="淮安2-甲基四氫呋喃規(guī)格,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624164107853/4550822.png"></div><p style="text-indent:25px">PTMEA至PTMEG轉(zhuǎn)化的結(jié)果是聚合物料中留下了催化劑甲醇鈉(NaOMe)。要去除催化劑，首先用20%硫酸鎂水溶液與PTMEG中的甲醇鈉中和，反應(yīng)生成氫氧化鎂和硫酸鈉鹽，然后PTMEG 產(chǎn)品物料通過(guò)兩級(jí)干燥過(guò)程將其中所有的氫氧化鎂和硫酸鈉鹽結(jié)晶析出。干燥脫水后的PTMEG 連同結(jié)晶顆粒一起被通過(guò)“板框式”壓濾機(jī)過(guò)濾系統(tǒng)，以去除其中的固體結(jié)晶顆粒。窄化處理工藝過(guò)程部分提供了對(duì)PTMEG 的之后凈化，并通過(guò)去除產(chǎn)品中的低分子量聚合物，對(duì)聚合物產(chǎn)品的分子量（MW）分布進(jìn)行之后的窄化調(diào)整。這是通過(guò)兩級(jí)工藝過(guò)程實(shí)現(xiàn)的。經(jīng)初級(jí)工藝過(guò)程的“真空脫氣”后除去水、氮?dú)獾炔荒龤?，聚合物產(chǎn)品被輸送到短程蒸餾來(lái)完成之后一級(jí)工藝過(guò)程，在此過(guò)程中，低分子聚合被脫除。脫氣和短程蒸餾都備有冷阱用來(lái)凝聚低分子量聚合物。</p><p style="text-indent:25px">四氫呋喃是一種重要的有機(jī)化工及精細(xì)化工原料，普遍應(yīng)用于樹(shù)脂溶劑（磁帶涂層、PVC表面涂層、清洗PVC反應(yīng)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(yīng)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(jī)聚合物）；化學(xué)中間產(chǎn)物（聚合生成PTMEG、天然氣加味劑）；色譜溶劑（凝膠滲透色譜法）。聚四氫呋喃主要用作嵌段聚氨酯或嵌段聚醚聚酯的軟鏈段。由平均分子量為1000的聚四氫呋喃制得的嵌段聚氨酯橡膠，可用作輪胎、傳動(dòng)帶、墊圈等;也可用于涂料、人造革、薄膜等。制得的嵌段聚醚聚酯為熱塑性彈性體。平均分子量為2000的聚四氫呋喃，可用以制聚氨酯彈性纖維。由聚四氫呋喃制成的嵌段聚氨酯具有良好的抗凝血性，可用作醫(yī)用高分子材料。四氫呋喃可用作溶劑、有機(jī)合成的原料。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="淮安2-甲基四氫呋喃規(guī)格,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624064664530/9526363.png"></div><p style="text-indent:25px">應(yīng)用實(shí)例：鹽酸曲馬多合成中的應(yīng)用鹽酸曲馬多，在抗HIV藥替普那韋合成中的應(yīng)用替普那韋，在血管緊張素轉(zhuǎn)化酶控制劑馬來(lái)酸依那普利合成中的應(yīng)用馬來(lái)酸依那普利，在抗***藥氟康唑合成中的應(yīng)用氟康唑，在抗藥三尖杉酯堿合成中的應(yīng)用，在抗抑郁藥鹽酸安非他酮合成中的應(yīng)用芳樟醇芳香酮，在芳樟醇/香酮合成中的應(yīng)用，在農(nóng)藥草銨膦合成中的應(yīng)用，在聯(lián)苯醇的合成中應(yīng)用。 MeTHF凝固點(diǎn)為-136℃，因而它可以替代THF用于低溫下有機(jī)鋰反應(yīng)。在有機(jī)鋰化學(xué)中，使用MeTHF作溶劑與THF相比，不僅分離方便，而且所得的鋰。四氫呋喃分子在常溫常壓下有較小粘稠度的有機(jī)液體。安徽2-甲基四氫呋喃產(chǎn)品介紹</p><p style="text-indent:25px">2-甲基四氫呋喃是一種有機(jī)化合物，分子式是C5H10O。淮安2-甲基四氫呋喃規(guī)格</p><p style="text-indent:25px">丙烯酸四氫呋喃酯的合成量取100mL上述自制固體酸催化劑裝入反應(yīng)精餾裝置的反應(yīng)管中，催化劑床層上下方均裝填石英砂作為保溫、支撐層。取摩爾比1.2：1的丙烯酸和四氫糠醇，以?xún)杀顿|(zhì)量的甲苯稀釋?zhuān)♂屢褐屑尤?.01%的對(duì)苯二酚作為阻聚劑，攪拌至對(duì)苯二酚完全溶解，放置備用。設(shè)置反應(yīng)精餾裝置預(yù)熱器溫度85℃，設(shè)置催化劑床層上口溫度85℃，下口溫度110℃，設(shè)置體系壓力80KPa，將上述原料溶液以一定流速連續(xù)輸入到反應(yīng)器，經(jīng)預(yù)熱器預(yù)熱后到達(dá)反應(yīng)器頂部，自然流下在催化劑床層進(jìn)行酯化反應(yīng)。反應(yīng)中生成的水和溶劑甲苯形成共沸物從反應(yīng)器頂部抽出，冷凝后進(jìn)入分水器，甲苯回流入反應(yīng)器，水定期采出。反應(yīng)體系穩(wěn)定一小時(shí)后取樣分析，以GCMS-QP 2010 SE氣質(zhì)聯(lián)用儀進(jìn)行定性分析，GC-2010 Plus氣相色譜儀進(jìn)行定量分析。四氫糠醇轉(zhuǎn)化率99%，單酯選擇性97%。粗產(chǎn)品濃縮后，將殘留溶劑和過(guò)量丙烯酸蒸出后得到成品，為透明接近無(wú)色的液體，收率97%（以四氫糠醇計(jì)），酯含量99%，酸值0.2（mgKOH/g），水分0.05%，鉑鈷色號(hào)小于20，指標(biāo)均達(dá)到產(chǎn)品標(biāo)準(zhǔn)要求?；窗?-甲基四氫呋喃規(guī)格</p><p style="text-indent:25px">上海蔚云化工有限公司發(fā)展規(guī)模團(tuán)隊(duì)不斷壯大，現(xiàn)有一支專(zhuān)業(yè)技術(shù)團(tuán)隊(duì)，各種專(zhuān)業(yè)設(shè)備齊全。致力于創(chuàng)造***的產(chǎn)品與服務(wù)，以誠(chéng)信、敬業(yè)、進(jìn)取為宗旨，以建巴斯夫陶氏產(chǎn)品為目標(biāo)，努力打造成為同行業(yè)中具有影響力的企業(yè)。我公司擁有強(qiáng)大的技術(shù)實(shí)力，多年來(lái)一直專(zhuān)注于化工產(chǎn)品（除危險(xiǎn)化學(xué)品、監(jiān)控化學(xué)品、煙花爆竹、民用物品、易制毒化學(xué)品）、化工機(jī)械設(shè)備及配件的銷(xiāo)售，在化工技術(shù)領(lǐng)域內(nèi)從事技術(shù)開(kāi)發(fā)、技術(shù)轉(zhuǎn)讓、技術(shù)服務(wù)、技術(shù)咨詢(xún)?！疽婪毥?jīng)批準(zhǔn)的項(xiàng)目，經(jīng)相關(guān)部門(mén)批準(zhǔn)后方可開(kāi)展經(jīng)營(yíng)活動(dòng)】的發(fā)展和創(chuàng)新，打造高指標(biāo)產(chǎn)品和服務(wù)。上海蔚云化工有限公司主營(yíng)業(yè)務(wù)涵蓋環(huán)戊酮，甲基異丙基酮，丙二胺，二甘醇胺，堅(jiān)持“質(zhì)量保證、良好服務(wù)、顧客滿(mǎn)意”的質(zhì)量方針，贏得廣大客戶(hù)的支持和信賴(lài)。</p></p><br /><p>文章來(lái)源地址: http://m.cdcfah.com/cp/1972254.html</p></div></div></div></div></div><div id="3gseq8o" class="page-right twoColRt"><div id="c8fmd3p" class="box01 margin10 clearfix"><h3><a 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