上海2-甲基四氫呋喃價(jià)格表上海蔚云化工供應(yīng)-b2b網(wǎng)站_b2b電子商務(wù)平臺(tái)【買產(chǎn)品】-上?？谄蚴称酚邢薰?/title><meta name="description" content="四氫呋喃與水能混溶，并常含有少量水分及過(guò)氧化物。如要制得無(wú)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(guò)氧化物，然后蒸餾，收集66℃的餾分蒸餾時(shí)不要蒸干，將剩余少量殘液即倒出Chemical"><meta name="keywords" content="上海2-甲基四氫呋喃價(jià)格表,2-甲基四氫呋喃"><link rel="canonical" href="http://www.cdcfah.com/"/><meta name="applicable-device" content="pc"><link rel="shortcut icon" href="/static/new_net_01/images/favicon.ico"><link rel="stylesheet" href="/static/new_net_01/css/slick.css" /><link rel="stylesheet" href="/static/new_net_01/css/addnew.css"><link rel="stylesheet" href="/static/new_net_01/css/sidenav.css"><link rel="stylesheet" href="/static/new_net_01/css/style.css" /><link rel="stylesheet" href="/static/new_net_01/css/tab.css"><link rel="stylesheet" href="/static/new_net_01/css/404.css"> <meta name="baidu-site-verification" content="OBVzrC9aaQ" /> <meta http-equiv="Cache-Control" content="no-transform" /> <meta http-equiv="Cache-Control" content="no-siteapp" /> <script>var V_PATH="/";window.onerror=function(){ return true; };</script> </head><body> <h1><a href="http://www.cdcfah.com/">六月丁香婷婷亚洲中文字幕,欧美精品高清一区二区蜜芽,尤物92午夜福利视频,精品视频一区二区三区在线观看</a></h1> <div style="position:fixed;left:-9000px;top:-9000px;"><object id="qgqbi"></object><delect id="qgqbi"><sub id="qgqbi"><dl id="qgqbi"></dl></sub></delect><track id="qgqbi"></track><tr id="qgqbi"></tr><video id="qgqbi"></video><xmp id="qgqbi"><span id="qgqbi"></span></xmp><span id="qgqbi"></span><strong id="qgqbi"><em id="qgqbi"><sup id="qgqbi"><progress id="qgqbi"></progress></sup></em></strong><dl id="qgqbi"><small id="qgqbi"></small></dl><wbr id="qgqbi"></wbr><noscript id="qgqbi"></noscript><tr id="qgqbi"></tr><track id="qgqbi"><dl id="qgqbi"></dl></track><label id="qgqbi"><em id="qgqbi"></em></label><tbody id="qgqbi"></tbody><blockquote id="qgqbi"></blockquote><dfn id="qgqbi"><center id="qgqbi"></center></dfn><sub id="qgqbi"></sub><u 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href="http://www.cdcfah.com/cp/third-sysqm_qtsysyp/">其他實(shí)驗(yàn)室用品</a>?上海2-甲基四氫呋喃價(jià)格表上海蔚云化工供應(yīng)</p><div id="gphjq8r" class="leftbox clearfix"><h1>上海2-甲基四氫呋喃價(jià)格表上海蔚云化工供應(yīng)</h1><div id="aj823bd" class="proBig"><div id="dh2bb3v" 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="jd2z2ph" 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="smj34cr" 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>上海2-甲基四氫呋喃價(jià)格表,2-甲基四氫呋喃</p><p><span>***更新：</span>2020-11-16 03:19:49</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="dcurjsu" 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="vfheq8q" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="rld8p3b" class="box"><p><p style="text-indent:25px">四氫呋喃與水能混溶，并常含有少量水分及過(guò)氧化物。如要制得無(wú)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(guò)氧化物，然后蒸餾，收集66℃的餾分蒸餾時(shí)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?dú)夥罩斜４妗Ｌ幚硭臍溥秽珪r(shí)，應(yīng)先用小量進(jìn)行試驗(yàn)，在確定其中只有少量水和過(guò)氧化物，上海2-甲基四氫呋喃價(jià)格表，作用不致過(guò)于激烈時(shí)，方可進(jìn)行純化。四氫呋喃中的過(guò)氧化物可用酸化的碘化鉀溶液來(lái)檢驗(yàn)。如過(guò)氧化物較多，應(yīng)另行處理為宜。HF是一種重要的有機(jī)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，上海2-甲基四氫呋喃價(jià)格表，用于電鍍鋁液時(shí)可任意控制鋁層厚度且光亮，上海2-甲基四氫呋喃價(jià)格表。甲基，化學(xué)式為-CH?，由碳和氫元素組成。上海2-甲基四氫呋喃價(jià)格表</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海2-甲基四氫呋喃價(jià)格表,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389623961490638/1355180.png"></div><p style="text-indent:25px">四氫呋喃性狀：無(wú)色液體，有與醚類似的氣味。能與水和有機(jī)溶劑相混溶，易燃。四氫呋喃在強(qiáng)氧化劑高錳酸鉀的作用下會(huì)發(fā)生反應(yīng)生成丁二酸；檢測(cè)殘留四氫呋喃的方法感覺(jué)用儀器分析，如氣、液相色譜；四氫呋喃是一種性質(zhì)比較穩(wěn)定的常用的有機(jī)溶劑，也可用于化工產(chǎn)品生產(chǎn)原料。四氫呋喃的沸點(diǎn)是分子量72.11相對(duì)dao密度（du20℃/4℃dao）0.8892凝固點(diǎn)/℃-108.5沸點(diǎn)/℃65.4閃點(diǎn)（閉口）/℃17.2折光率（20℃）1.407介電常回?cái)?shù)（25℃）7.58偶極矩/(10^-30C·答m)5.70,5.67表面張力/(mN/m)26.4黏度(20℃)/mPa·s0.55臨界溫度/℃26.8臨界壓力/MPa5.19蒸氣壓(15℃)/kPa15.2 蒸氣相對(duì)密度（空氣=1）2.5燃點(diǎn)/℃321.1蒸發(fā)熱(66℃)/(KJ/Kg)410極限/%(體積)2.3-11.8較小引燃能量/mJ0.5。安徽2-甲基四氫呋喃工廠四氫呋喃普遍用于表面涂料。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海2-甲基四氫呋喃價(jià)格表,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389623894254288/5270430.png"></div><p style="text-indent:25px">順酐催化加氫法：順酐和氫氣從底部進(jìn)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(guò)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(jìn)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(dá)99.9%，四氫呋喃選擇性為85%～95%，產(chǎn)品含量達(dá)99.97%。該工藝具有催化劑性能好、流程簡(jiǎn)單、投資少等特點(diǎn)。4-丁二醇脫水環(huán)化法：其工藝過(guò)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(jìn)行過(guò)濾，得到的硫酸水溶液可以重新使用，這一過(guò)程的四氫呋喃收率可以達(dá)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(jiǎn)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。</p><p style="text-indent:25px">與氧化劑接觸猛烈反應(yīng)。流速過(guò)快,容易產(chǎn)生和積聚靜電。其蒸氣比空氣重,能在較低處擴(kuò)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?yàn)樗臍淇反季哂胁嫉幕瘜W(xué)性質(zhì)，所以可以和溴化氫通過(guò)雙分子親核取代機(jī)制(SN2)反應(yīng)生成2-溴甲基四氫呋喃。四氫呋喃極性強(qiáng)四氫呋喃是一類雜環(huán)有機(jī)化合物。它是強(qiáng)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(shí)要看看有沒(méi)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。四氫呋喃在儲(chǔ)存時(shí)容易變成過(guò)氧化物。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海2-甲基四氫呋喃價(jià)格表,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624283199578/5832986.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。四氫呋喃與水能混溶。上海2-甲基四氫呋喃價(jià)格表</p><p style="text-indent:25px">甲烷分子中去掉一個(gè)氫原子后剩下的電中性的一價(jià)基團(tuán)。上海2-甲基四氫呋喃價(jià)格表</p><p style="text-indent:25px">四氫呋喃聚合生產(chǎn)聚四亞甲基醚二醇催化劑制備技術(shù)，多級(jí)孔硅鋁復(fù)合氧化物聚合催化劑，實(shí)現(xiàn)了PTMEG產(chǎn)品的分子量大小及分子量分布的調(diào)控。與國(guó)外粘土催化劑相比，四氫呋喃轉(zhuǎn)化率由30~40%提高到38%~45%之間；獲得了以SiO2改性Al2O3為載體的負(fù)載Pd加氫脫色催化劑，在羰基高選擇性加氫的同時(shí)避免了加氫過(guò)程中PTMEG分子中C-O-C鍵的斷裂，產(chǎn)品收率提高到99%以上，色度由原來(lái)的30 APHA，降低至3個(gè)色號(hào)以下；基于項(xiàng)目的研究，形成了聚合與加氫脫色催化劑工業(yè)規(guī)模制備技術(shù)，編制了200 t/a催化劑制備與催化反應(yīng)工藝完整的工藝包，建成了催化劑制備與反應(yīng)工藝示范工程，具備了50 t/a催化劑生產(chǎn)能力。上海2-甲基四氫呋喃價(jià)格表</p><p style="text-indent:25px">上海蔚云化工有限公司位于靜安區(qū)靈石路709號(hào)55幢A2113室，交通便利，環(huán)境優(yōu)美，是一家貿(mào)易型企業(yè)。上海蔚云化工是一家私營(yíng)有限責(zé)任公司企業(yè)，一直“以人為本，服務(wù)于社會(huì)”的經(jīng)營(yíng)理念;“誠(chéng)守信譽(yù)，持續(xù)發(fā)展”的質(zhì)量方針。以滿足顧客要求為己任；以顧客永遠(yuǎn)滿意為標(biāo)準(zhǔn)；以保持行業(yè)優(yōu)先為目標(biāo)，提供***的環(huán)戊酮，甲基異丙基酮，丙二胺，二甘醇胺。上海蔚云化工順應(yīng)時(shí)代發(fā)展和市場(chǎng)需求，通過(guò)**技術(shù)，力圖保證高規(guī)格高質(zhì)量的環(huán)戊酮，甲基異丙基酮，丙二胺，二甘醇胺。</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/2007935.html</p></div></div></div></div></div><div id="3iyqxgx" class="page-right twoColRt"><div id="tdahzbt" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="bldqnub" 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(qiáng) 信息推薦自業(yè)物資供應(yīng)" class="vcenter" 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