江蘇2-甲基四氫呋喃哪家便宜上海蔚云化工供應(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="鈀催化硅試劑與鹵化物的偶聯(lián)反應(yīng)C-N鍵形成的偶聯(lián)反應(yīng)酮的α-芳基化反應(yīng)鈀催化的烯丙基類化合物的反應(yīng)兩相反應(yīng)的溶劑，江蘇2-甲基四氫呋喃哪家便宜，MeTHF是非常有效的兩相反應(yīng)溶劑，特別是在氫氧化鈉水溶液中進(jìn)行的烷基化、酰胺化和親核取代反應(yīng)。"><meta name="keywords" content="江蘇2-甲基四氫呋喃哪家便宜,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 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href="http://www.cdcfah.com/cp/third-sysqm_qtsysyp/">其他實(shí)驗(yàn)室用品</a>?江蘇2-甲基四氫呋喃哪家便宜上海蔚云化工供應(yīng)</p><div id="jnk8axu" class="leftbox clearfix"><h1>江蘇2-甲基四氫呋喃哪家便宜上海蔚云化工供應(yīng)</h1><div id="yhol3y7" class="proBig"><div id="qjgtdhj" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624027184007/8887733.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="8dxebnk" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624027184007/8887733.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="a2vgdfr" 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>江蘇2-甲基四氫呋喃哪家便宜,2-甲基四氫呋喃</p><p><span>***更新：</span>2020-11-06 01:22:22</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="gselnu2" 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="8sj7o2a" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="2h38lpt" class="box"><p><p style="text-indent:25px"> 鈀催化硅試劑與鹵化物的偶聯(lián) 反應(yīng) C-N鍵形成的偶聯(lián) 反應(yīng) 酮的α-芳基化反應(yīng) 鈀催化的烯丙基類化合物的反應(yīng)兩相反應(yīng)的溶劑，江蘇2-甲基四氫呋喃哪家便宜，MeTHF是非常有效的兩相反應(yīng)溶劑，特別是在氫氧化鈉水溶液中進(jìn)行的烷基化、酰胺化和親核取代反應(yīng)。MeTHF 作為兩相反應(yīng)的溶劑，不僅反應(yīng)易進(jìn)行，而且分層界面清晰。由于MeTHF作溶劑時(shí)，產(chǎn)品分離回收更方便，因而常用作還原胺化和胺的?；磻?yīng)溶劑。極易揮發(fā)，通常都有大量損失；致ai物質(zhì)；鹵代烷是嚴(yán)格受限制的化學(xué)品。 4，江蘇2-甲基四氫呋喃哪家便宜.5 2-MeTHF－鹵代烷的優(yōu)良替代品鹵代烷的缺點(diǎn)： 2-MeTHF相對(duì)于CH2Cl2的優(yōu)越性與水微溶，江蘇2-甲基四氫呋喃哪家便宜，回收方便；對(duì)溶解在DCM中的極性化合物具有很強(qiáng)的溶解性。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。江蘇2-甲基四氫呋喃哪家便宜</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="江蘇2-甲基四氫呋喃哪家便宜,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624027184007/8887733.png"></div><p style="text-indent:25px">侵入途徑：吸入、食入、經(jīng)皮吸收。健康危害：本品具有刺激和麻醉作用。吸入后引起上呼吸道刺激、惡心、頭暈、***和系統(tǒng)控制。能引起肝、腎損害。液體或高濃度蒸氣對(duì)眼有刺激性。皮膚長(zhǎng)期反復(fù)接觸，可因脫脂作用而發(fā)生皮炎；環(huán)境危害：對(duì)水生生物有毒性。燃爆危險(xiǎn)：極易燃，其蒸氣與空氣混合，能形成性混合物。急救措施。皮膚接觸：脫去污染的衣著，用肥皂水和清水徹底沖洗皮膚。如有不適感，就醫(yī)眼睛接觸：提起眼瞼，用流動(dòng)清水或生理鹽水徹底沖洗10-15min。吸入：迅速脫離現(xiàn)場(chǎng)至空氣新鮮處。保持呼吸道通暢。如呼吸困難，給屬氧。呼吸、心跳停止，立即進(jìn)行心肺復(fù)蘇術(shù)。就醫(yī)食入：漱口。如有不適感。就醫(yī)消防措施危險(xiǎn)特性：其蒸氣與空氣可形成性混合物，遇明火、高熱及強(qiáng)氧化劑易引起燃燒。接觸空氣活在光照條件下可生成具有潛在危險(xiǎn)性的過(guò)氧化物。與酸類接觸能發(fā)生反應(yīng)。與氫氧化鉀、氫氧化鈉反應(yīng)劇烈。蒸氣比空氣重，沿地面擴(kuò)散并易積存于低洼處，遇火源會(huì)著火回燃。舟山2-甲基四氫呋喃價(jià)格2-甲基四氫呋喃含量低,容易處理。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="江蘇2-甲基四氫呋喃哪家便宜,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389623884264046/3770351.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。</p><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(yīng)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(dá)80%以上，菌體能重復(fù)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。四氫呋喃分子在常溫常壓下有較小粘稠度的有機(jī)液體。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="江蘇2-甲基四氫呋喃哪家便宜,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624016490617/6540095.png"></div><p style="text-indent:25px">四氫呋喃THF主要用作生產(chǎn)原料和溶劑，但是它卻是在世界衛(wèi)生組織國(guó)際ai癥研究機(jī)構(gòu)公布的致ai物清單初步整理參考中，四氫呋喃在2B類致ai物清單中。四氫呋喃，是一個(gè)雜環(huán)有機(jī)化合物。屬于醚類，是芳香族化合物呋喃的完全氫化產(chǎn)物，是一種無(wú)色、可與水混溶、在常溫常壓下有較小粘稠度的有機(jī)液體。對(duì)于它的檢測(cè)，除了使用氣體檢測(cè)儀，我們還可以使用GASTEC四氫呋喃檢測(cè)管來(lái)快速且精確地檢測(cè)。四氫呋喃檢測(cè)管在使用時(shí)只需配備上GASTEC的手泵即可簡(jiǎn)單的完成檢測(cè)，氣體檢測(cè)管法作為一種簡(jiǎn)單、快速、直讀的檢測(cè)方法，具有其獨(dú)特的優(yōu)勢(shì)，在很多國(guó)家，檢測(cè)管法作為精密檢測(cè)方法的一種補(bǔ)充，得到了普遍的應(yīng)用。這款四氫呋喃氣體檢測(cè)管檢測(cè)快速，檢測(cè)結(jié)果較準(zhǔn)可靠。四氫呋喃是一種常用的中等極性非質(zhì)子性溶劑。紹興2-甲基四氫呋喃價(jià)格哪家便宜</p><p style="text-indent:25px">常溫下大多數(shù)聚四氫呋喃二醇是白色蠟狀固體。江蘇2-甲基四氫呋喃哪家便宜</p><p style="text-indent:25px">工業(yè)生產(chǎn)較早以糖醛為原料，將糖醛與蒸氣的混合物通入填充鋅-鉻-錳金屬氧化物（或鈀）催化劑的反應(yīng)器，于400-420℃脫去羰基而成呋喃；然后以骨架鎳為催化劑，于80-120℃呋喃加氫制得四氫呋喃。該法生產(chǎn)1噸四氫呋喃，約需消耗3噸多糖醛。后來(lái)發(fā)展的生產(chǎn)方法有許多種，工業(yè)化的方法有1,4-丁二醇催化脫水環(huán)合法，因?yàn)槎《际怯梢胰埠图兹┲频玫?，此法稱雷由法（Reppe法）；利用氯丁橡膠單體氯丁二烯的副產(chǎn)物1,4-二氯丁烯生產(chǎn)四氫呋喃，稱為二氯丁烯法；發(fā)展了以順酐為原料的催化加氫法?？啡┓ǎ河煽啡┟擊驶蛇秽偌託涠??！∵@是工業(yè)上較早生產(chǎn)四氫呋喃的方法之一?？啡┲饕捎衩仔镜绒r(nóng)副產(chǎn)品水解制造。該法污染嚴(yán)重，不利于大規(guī)模生產(chǎn)，已逐步被淘汰。江蘇2-甲基四氫呋喃哪家便宜</p><p style="text-indent:25px">上海蔚云化工有限公司是一家貿(mào)易型類企業(yè)，積極探索行業(yè)發(fā)展，努力實(shí)現(xiàn)產(chǎn)品創(chuàng)新。公司是一家私營(yíng)有限責(zé)任公司企業(yè)，以誠(chéng)信務(wù)實(shí)的創(chuàng)業(yè)精神、專業(yè)的管理團(tuán)隊(duì)、踏實(shí)的職工隊(duì)伍，努力為廣大用戶提供***的產(chǎn)品。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，價(jià)格合理，品質(zhì)有保證，深受廣大客戶的歡迎。上海蔚云化工將以真誠(chéng)的服務(wù)、創(chuàng)新的理念、***的產(chǎn)品，為彼此贏得全新的未來(lái)！</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/1864362.html</p></div></div></div></div></div><div id="akmjgxu" class="page-right 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