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class="container clearfix tcPro"><section class="home-main container clearfix"><div id="is8mj82" class="twoCol"><div id="j7eogqh" class="page-proshow clearfix"><p class="current"> 當(dāng)前位置:<a href="http://www.cdcfah.com/">首頁?<a href="http://www.cdcfah.com/cp/">產(chǎn)品供應(yīng)</a>?<a href="http://www.cdcfah.com/cp/first-_huagong/">化工</a>?<a href="http://www.cdcfah.com/cp/second-_sysqm/">實驗室器皿</a>?<a href="http://www.cdcfah.com/cp/third-sysqm_qtsysyp/">其他實驗室用品</a>?山東2-甲基四氫呋喃報價多少錢上海蔚云化工供應(yīng)</p><div id="8p7pbdf" class="leftbox clearfix"><h1>山東2-甲基四氫呋喃報價多少錢上海蔚云化工供應(yīng)</h1><div id="fmfw2mw" class="proBig"><div id="tdfsppb" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624080435939/3968180.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="j8rjlx8" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624080435939/3968180.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="j88wovx" 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>山東2-甲基四氫呋喃報價多少錢,2-甲基四氫呋喃</p><p><span>***更新：</span>2020-10-27 09:26:53</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="ugifhov" 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="jyv8y2b" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="wli97y2" class="box"><p><p style="text-indent:25px">包裝方法：小開口鋼桶；安瓿瓶外普通木箱；螺紋口玻璃瓶、鐵蓋壓口玻璃瓶、塑料瓶或金屬桶（罐）外普通木箱。監(jiān)測方法：工程控制：生產(chǎn)過程密閉，加強通風(fēng)。呼吸系統(tǒng)防護：空氣中濃度較高時，應(yīng)該佩戴防毒面具。眼睛防護：戴化學(xué)安全防護眼鏡。身體防護：穿防靜電工作服。手防護：戴防護手套。其他防護：工作現(xiàn)場嚴(yán)禁吸煙。工作后，淋浴更衣。保持良好的衛(wèi)生習(xí)慣。理化特性外觀與性狀：無色揮發(fā)性液體，有類似醚的氣味，山東2-甲基四氫呋喃報價多少錢。粘性：溶解性：微溶于水，可混溶于多數(shù)有機溶劑。主要用途：用作合成藥物磷酸氯喹、磷酸伯氨喹等的原料，也可用作溶劑。穩(wěn)定性：在常溫常壓下穩(wěn)定禁配物：強氧化劑、潮濕空氣。避免接觸的條件：接觸空氣。聚合危害：不能出現(xiàn)，山東2-甲基四氫呋喃報價多少錢，山東2-甲基四氫呋喃報價多少錢。四氫呋喃又名一氧五環(huán)、氧雜環(huán)戊烷、四亞甲基氧。山東2-甲基四氫呋喃報價多少錢</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="山東2-甲基四氫呋喃報價多少錢,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624080435939/3968180.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)生組織國際ai癥研究機構(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，是一個雜環(huán)有機化合物。屬于醚類，是芳香族化合物呋喃的完全氫化產(chǎn)物，是一種無色、可與水混溶、在常溫常壓下有較小粘稠度的有機液體。對于它的檢測，除了使用氣體檢測儀，我們還可以使用GASTEC四氫呋喃檢測管來快速且精確地檢測。四氫呋喃檢測管在使用時只需配備上GASTEC的手泵即可簡單的完成檢測，氣體檢測管法作為一種簡單、快速、直讀的檢測方法，具有其獨特的優(yōu)勢，在很多國家，檢測管法作為精密檢測方法的一種補充，得到了普遍的應(yīng)用。這款四氫呋喃氣體檢測管檢測快速，檢測結(jié)果較準(zhǔn)可靠。南通2-甲基四氫呋喃定制哪家好甲基呋喃可用于溶液聚合中作溶劑使用。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="山東2-甲基四氫呋喃報價多少錢,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624064664530/9526363.png"></div><p style="text-indent:25px">在常溫下大多數(shù)聚四氫呋喃二醇是白色蠟狀固體，在40℃左右熔化成低黏度無色至淺黃色透明液體。分子量為650～2900的PTMEG閃點（PMCC）這197～207℃，熔點（凝固點）為11～38℃（詳細(xì)數(shù)據(jù)請見有關(guān)廠家的產(chǎn)品數(shù)據(jù)），熔化了的PTMEG可過冷，結(jié)晶緩慢。聚四氫呋喃二醇折射率（25℃）為1.464。不溶于水，在水中的溶解度小于1%，也不溶于脂肪烴，可溶于芳烴、氯化烴、醇、酯、酮等極性有機溶劑。聚四氫呋喃二醇在隔絕氧氣下貯存穩(wěn)定，例如在氮氣保護下55℃以下可至少穩(wěn)定貯存1年。在100℃只能貯存數(shù)天。長期接觸空氣可導(dǎo)致氧化和降解，造成色澤變黃、過氧化物含量和酸值增加，在無空氣下210～220℃發(fā)生熱降解，生成四氫呋喃，為了改善貯存穩(wěn)定性，PTMKEG工業(yè)品中一般加有微量的抗氧劑。</p><p style="text-indent:25px">2-甲基呋喃由鎳催化在150℃下進行加氫反應(yīng)即得粗品。經(jīng)脫水、精餾制得成品。另外，在生產(chǎn)乙酰正丙醇時可副產(chǎn)2一甲基四氫呋喃。2-甲基四氫呋喃作為一種環(huán)醚，也是一種路易斯堿，更是一種環(huán)境友好、性能優(yōu)良的獨特的溶劑。近幾年來，由于2-甲基四氫呋喃優(yōu)良的性能和環(huán)境友好的特點，使其在溶劑替代應(yīng)用領(lǐng)域得以迅速的的發(fā)展：用于替代安全隱患大的四氫呋喃、**等，用作格氏反應(yīng)溶劑；用于替代高毒性的鹵代烴類、苯類等作為有機合成的反應(yīng)溶劑或萃取溶劑；應(yīng)用于有機金屬反應(yīng)和兩相反應(yīng)的溶劑。14KPa下，以MeCO(CH2)nCH2Cl為原料與Bu3SnH反應(yīng)得到環(huán)醚，且產(chǎn)率與環(huán)的大小有關(guān)。當(dāng)n＝2時，所得2-甲基四氫呋喃的產(chǎn)率為98％。將RCH2CH2OCHR’CH2R(R＝Br，Cl；R’＝H，Me)在極性溶劑中用鋅粉、鉀汞齊或鋰汞齊的作用下發(fā)生分子內(nèi)偶聯(lián)反應(yīng)得2-甲基四氫呋喃。利用水溶液Cu(II)堿金屬氯化物催化氧化1，3-戊二烯得到2-甲基四氫呋喃。四氫呋喃可用作溶劑、有機合成的原料。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="山東2-甲基四氫呋喃報價多少錢,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624097545321/7454619.png"></div><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。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，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，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(fù)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。四氫呋喃是一種重要的有機合成原料且是性能優(yōu)良的溶劑。山東2-甲基四氫呋喃報價多少錢</p><p style="text-indent:25px">甲基作為一個化學(xué)基團，它能夠結(jié)合在DNA上某些特定部位。山東2-甲基四氫呋喃報價多少錢</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，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)易進行，而且分層界面清晰。由于MeTHF作溶劑時，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。 4.5 2-MeTHF－鹵代烷的優(yōu)良替代品鹵代烷的缺點： 2-MeTHF相對于CH2Cl2的優(yōu)越性與水微溶，回收方便；對溶解在DCM中的極性化合物具有很強的溶解性。山東2-甲基四氫呋喃報價多少錢</p><p style="text-indent:25px">上海蔚云化工有限公司辦公設(shè)施齊全，辦公環(huán)境優(yōu)越，為員工打造良好的辦公環(huán)境。致力于創(chuàng)造***的產(chǎn)品與服務(wù)，以誠信、敬業(yè)、進取為宗旨，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)。我公司擁有強大的技術(shù)實力，多年來一直專注于化工產(chǎn)品（除危險化學(xué)品、監(jiān)控化學(xué)品、煙花爆竹、民用物品、易制毒化學(xué)品）、化工機械設(shè)備及配件的銷售，在化工技術(shù)領(lǐng)域內(nèi)從事技術(shù)開發(fā)、技術(shù)轉(zhuǎn)讓、技術(shù)服務(wù)、技術(shù)咨詢?！疽婪毥?jīng)批準(zhǔn)的項目，經(jīng)相關(guān)部門批準(zhǔn)后方可開展經(jīng)營活動】的發(fā)展和創(chuàng)新，打造高指標(biāo)產(chǎn)品和服務(wù)。誠實、守信是對企業(yè)的經(jīng)營要求，也是我們做人的基本準(zhǔn)則。公司致力于打造***的環(huán)戊酮，甲基異丙基酮，丙二胺，二甘醇胺。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/1730997.html</p></div></div></div></div></div><div id="p797wsp" class="page-right twoColRt"><div id="dxpzq88" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="j8vwya8" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img 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