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id = "index_show"><a href="http://m.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="2xy5lij" class="twoCol"><div id="tikjvco" class="page-proshow clearfix"><p class="current"> 當(dāng)前位置:<a href="http://m.cdcfah.com/">首頁?<a href="http://m.cdcfah.com/cp/">產(chǎn)品供應(yīng)</a>?<a href="http://m.cdcfah.com/cp/first-_huagong/">化工</a>?<a href="http://m.cdcfah.com/cp/second-_sysqm/">實驗室器皿</a>?<a href="http://m.cdcfah.com/cp/third-sysqm_qtsysyp/">其他實驗室用品</a>?南京2-甲基四氫呋喃定做上海蔚云化工供應(yīng)</p><div id="nbdrdeg" class="leftbox clearfix"><h1>南京2-甲基四氫呋喃定做上海蔚云化工供應(yīng)</h1><div id="3rtfcta" class="proBig"><div id="gfhtaho" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shweiyun/637389623961490638/1355180.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="q8tam87" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shweiyun/637389623961490638/1355180.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="enpwt89" 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(guān)鍵詞：</span>南京2-甲基四氫呋喃定做,2-甲基四氫呋喃</p><p><span>***更新：</span>2020-12-07 06:20:08</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="qjvxjv7" 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(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="w33ugip" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="8gnulht" class="box"><p><p style="text-indent:25px">2-甲基四氫呋喃是一種有機化合物，分子式是C5H10O。外觀與性狀：透明,無色液體，密度：0.86 g/mL at 25 °C。熔點：-136 °C 凝固點：-136℃。沸點：78-80 °C，折射率：n** 1，南京2-甲基四氫呋喃定做.406。儲存條件：庫房通風(fēng)低溫干燥,與氧化劑、酸類分開存放。由2-甲基呋喃催化加氫而得。當(dāng)催化加氫反應(yīng)采用氯化鈀催化劑時,主要的產(chǎn)品是乙酰丙醇(見00420),但也可回收得到副產(chǎn)品2-甲基四氫呋喃。本品主要用作樹脂，南京2-甲基四氫呋喃定做、橡膠、乙基纖維素等的溶劑；用它提取脂肪族酸類，要比一般所用的低沸點溶劑好，在鈾的冶煉工業(yè)上也相當(dāng)重要。在制藥工業(yè)中可合成抗痔藥磷酸伯氨奎、磷酸氯喹等，南京2-甲基四氫呋喃定做。四氫呋喃又名一氧五環(huán)、氧雜環(huán)戊烷、四亞甲基氧。南京2-甲基四氫呋喃定做</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="南京2-甲基四氫呋喃定做,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389623961490638/1355180.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(yīng)在氮氣氛中保存。處理四氫呋喃時，應(yīng)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(yīng)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(yīng)溶劑，用于電鍍鋁液時可任意控制鋁層厚度且光亮。揚州2-甲基四氫呋喃批發(fā)廠家四氫呋喃丙烯酸酯是一種重要的特種丙烯酸酯。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="南京2-甲基四氫呋喃定做,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389623894254288/5270430.png"></div><p style="text-indent:25px"> 共沸回收2-MeTHF的能耗比用精餾法回收THF的能耗低70%。 THF因沸點低，水溶性極好，損耗大，回收率低，回收成本高，三廢處理費用高。長期使用2-MeTHF綜合成本比使用THF低。 2-甲基四氫呋喃沸點較高,容易冷凝回收,揮發(fā)損失少,大氣污染小；在水中溶解度小,通過共沸精餾后回收率高,進入廢水中的2-甲基四氫呋喃含量低,容易處理。 **、四氫呋喃、鹵代烷和苯等環(huán)境不友好的溶劑每年消耗量超過幾十萬噸，其中作為格氏反應(yīng)溶劑的**和四氫呋喃每年用量在萬噸以上。用2-甲基四氫呋喃替代上述環(huán)境不友好的溶劑符合綠色化工技術(shù)的要求，而且市場前景十分廣闊，經(jīng)濟和社會效益十分明顯。</p><p style="text-indent:25px">順酐催化加氫法：順酐和氫氣從底部進入內(nèi)裝鎳催化劑的反應(yīng)器，產(chǎn)物中四氫呋喃與γ-丁內(nèi)酯比例可通過調(diào)整操作參數(shù)加以控制。反應(yīng)產(chǎn)物與原料氫氣冷卻至50℃左右進入洗滌塔底部，使未反應(yīng)的氫氣及氣態(tài)與液態(tài)產(chǎn)物分離，未反應(yīng)的氫氣及氣態(tài)產(chǎn)物經(jīng)洗滌后循環(huán)到反應(yīng)器，液態(tài)產(chǎn)物經(jīng)蒸餾而得四氫呋喃產(chǎn)品。該工藝可在0～(5∶1)范圍內(nèi)任意調(diào)整γ-丁內(nèi)酯與四氫呋喃的比例，順酐的單程轉(zhuǎn)化率達99.9%，四氫呋喃選擇性為85%～95%，產(chǎn)品含量達99.97%。該工藝具有催化劑性能好、流程簡單、投資少等特點。4-丁二醇脫水環(huán)化法：其工藝過程為：向反應(yīng)器中加入1087kg 22%的硫酸水溶液，在100℃以110kg/h的速度加入1，4-丁二醇，塔頂溫度維持在80℃，以大約110kg/h的速度從塔頂?shù)玫胶?0%四氫呋喃的水溶液。加入50t 1，4-丁二醇后，從反應(yīng)器中排除約70kg焦質(zhì)。將焦質(zhì)進行過濾，得到的硫酸水溶液可以重新使用，這一過程的四氫呋喃收率可以達到99%以上。硫酸是四氫呋喃工業(yè)生產(chǎn)中使用較早的催化劑，也是現(xiàn)今生產(chǎn)中應(yīng)用較多的催化劑。此工藝技術(shù)成熟，工藝比較簡單，反應(yīng)溫度較低，四氫呋喃收率較高，但硫酸易腐蝕設(shè)備，污染環(huán)境。四氫呋喃具有低毒、低沸點、流動性好等特點。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="南京2-甲基四氫呋喃定做,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624164107853/4550822.png"></div><p style="text-indent:25px">與氧化劑接觸猛烈反應(yīng)。流速過快,容易產(chǎn)生和積聚靜電。其蒸氣比空氣重,能在較低處擴散到相當(dāng)遠(yuǎn)的地方,你好四氫糠醇和溴化氫能反應(yīng)，能生成2-溴甲基四氫呋喃。你好四氫糠醇和溴化氫能反應(yīng)，能生成2-溴甲基四氫呋喃。這是因為四氫糠醇具有伯醇的化學(xué)性質(zhì)，所以可以和溴化氫通過雙分子親核取代機制(SN2)反應(yīng)生成2-溴甲基四氫呋喃。四氫呋喃極性強四氫呋喃是一類雜環(huán)有機化合物。它是強的極性醚類之一,半數(shù)致死量：二甲亞砜（大鼠，經(jīng)口）17.9ml/經(jīng)口)7.6ml/kg，四氫呋喃(大鼠,如極性分子與非極性分子之間一般不能互溶。（有時要看看有沒有溶劑化作用，如溴是非極性分子，水是極性分子，除了反應(yīng)還有溶劑化作用。）組成這兩種物質(zhì)的化學(xué)鍵是否相同。相反從化合物上脫落的過程叫去甲基化。揚州2-甲基四氫呋喃批發(fā)廠家</p><p style="text-indent:25px">四氫呋喃用作色譜分析試劑、有機溶劑及尼龍66中間體。南京2-甲基四氫呋喃定做</p><p style="text-indent:25px">堿和過渡態(tài)金屬的配位，可對分子結(jié)構(gòu)特定位置上的C-H鍵直接活化，同時導(dǎo)向基團可以提高位置選擇性和轉(zhuǎn)化率。在C-H甲基化反應(yīng)中，現(xiàn)有的導(dǎo)向基團一般需要偶聯(lián)試劑（如格氏試劑），利用特殊的基于硼的烷基化試劑或者與貴重金屬鈀催化劑合用的陰離子導(dǎo)向基團。但在生物活***物分子中，因結(jié)構(gòu)復(fù)雜、官能團多，因此仍缺乏一種通用的合成方法。以分子內(nèi)的官能團作為導(dǎo)向基團，選用硼甲基化試劑，較關(guān)鍵的是以Cp*配位的(Cp* =C5Me5）高度親電性的Co(Ⅲ)催化劑，可以和更弱的路易斯堿官能團配位。鈷催化的甲基化反應(yīng)與其他過渡態(tài)金屬催化過程基本一致，首先鈷催化劑和底物絡(luò)合，經(jīng)C-H鍵活化和金屬交換反應(yīng)后，甲基從硼試劑轉(zhuǎn)移到鈷上，再經(jīng)還原消除，從而獲得甲基化產(chǎn)物，同時Co(Ⅲ)經(jīng)還原變?yōu)镃o(I)，再通過碳酸銀氧化為Co(Ⅲ)，從而完成催化循環(huán)。南京2-甲基四氫呋喃定做</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(wù)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。公司注重以質(zhì)量為中心，以服務(wù)為理念，秉持誠信為本的理念，打造化工良好品牌。上海蔚云化工秉承“客戶為尊、服務(wù)為榮、創(chuàng)意為先、技術(shù)為實”的經(jīng)營理念，全力打造公司的重點競爭力。</p></p><br /><p>文章來源地址: http://m.cdcfah.com/cp/2301614.html</p></div></div></div></div></div><div id="j2tvw8p" class="page-right twoColRt"><div id="wg382bt" class="box01 margin10 clearfix"><h3><a 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