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href="http://www.cdcfah.com/zh/"><span>展會(huì)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="eokmlhj" class="twoCol"><div id="sro3o8j" class="page-proshow clearfix"><p class="current"> 當(dāng)前位置:<a href="http://www.cdcfah.com/">首頁(yè)?<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(shí)驗(yàn)室器皿</a>?<a href="http://www.cdcfah.com/cp/third-sysqm_qtsysyp/">其他實(shí)驗(yàn)室用品</a>?紹興2-甲基四氫呋喃生產(chǎn)廠家排行榜上海蔚云化工供應(yīng)</p><div id="r2lfg3f" class="leftbox clearfix"><h1>紹興2-甲基四氫呋喃生產(chǎn)廠家排行榜上海蔚云化工供應(yīng)</h1><div id="vh3q2fr" class="proBig"><div id="autvhb8" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624064664530/9526363.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="82m7lua" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624064664530/9526363.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="zy7xrse" 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>紹興2-甲基四氫呋喃生產(chǎn)廠家排行榜,2-甲基四氫呋喃</p><p><span>***更新：</span>2020-10-24 03:22:30</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="393ik88" 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="3xov3vh" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="gv97riz" class="box"><p><p style="text-indent:25px">2-甲基呋喃可用于溶液聚合中作溶劑使用，也可用于合成戊二烯、戊二醇、乙酰丙醇及酮類(lèi)和2-甲基四氫呋喃。在醫(yī)藥工業(yè)中，可用于合成維生素B1、磷酸氯喹和磷酸伯氨喹等。包裝類(lèi)型：180公斤鍍鋅桶，或ISO Tank,20噸/罐，也可根據(jù)客戶(hù)要求包裝。儲(chǔ)存方式：儲(chǔ)存于陰涼、干燥、通風(fēng)良好的庫(kù)房。遠(yuǎn)離火種，紹興2-甲基四氫呋喃生產(chǎn)廠家排行榜、熱源。防止陽(yáng)光直射。包裝密封。與氧化劑、酸類(lèi)分開(kāi)存放。產(chǎn)品運(yùn)輸：運(yùn)輸過(guò)程中應(yīng)有遮蓋物，紹興2-甲基四氫呋喃生產(chǎn)廠家排行榜，確保包裝不泄露、不倒塌、不墜落，紹興2-甲基四氫呋喃生產(chǎn)廠家排行榜、不損壞，防止猛烈撞擊，不得與還原性物質(zhì)混運(yùn)。四氫呋喃丙烯酸酯是一種重要的特種丙烯酸酯。紹興2-甲基四氫呋喃生產(chǎn)廠家排行榜</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="紹興2-甲基四氫呋喃生產(chǎn)廠家排行榜,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624064664530/9526363.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。紹興2-甲基四氫呋喃生產(chǎn)廠家排行榜甲基化作用可在需氧或厭氧條件下進(jìn)行。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="紹興2-甲基四氫呋喃生產(chǎn)廠家排行榜,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389623991305064/1986424.png"></div><p style="text-indent:25px">甲基效應(yīng)在藥物化學(xué)中眾所周知，然而對(duì)于藥物分子的后期修仍具有一定的挑戰(zhàn)。通過(guò)鈷催化劑，實(shí)現(xiàn)了對(duì)復(fù)雜藥物分子后期的C-H甲基化反應(yīng)。依賴(lài)于硼的甲基化試劑，同時(shí)利用分子內(nèi)在的導(dǎo)向基團(tuán)來(lái)活化C-H鍵，該反應(yīng)具有普遍的適用性。此外，該反應(yīng)無(wú)需預(yù)功能化或后脫保護(hù)，即可對(duì)各種市售藥物分子和天然產(chǎn)物進(jìn)行甲基化。同時(shí)，理化性質(zhì)和生物學(xué)測(cè)試也證實(shí)了這種看似微小的結(jié)構(gòu)變化，會(huì)影響重要的藥物特性。在藥物開(kāi)發(fā)中，后期官能團(tuán)化或后期修飾至關(guān)重要。這種策略可直接對(duì)生物活性分子進(jìn)行結(jié)構(gòu)多樣化修飾，從而避免從頭合成，并迅速獲得目標(biāo)產(chǎn)物。過(guò)渡態(tài)金屬催化的特定位置C-H活化，已實(shí)現(xiàn)在復(fù)雜分子上引入體積較小的官能團(tuán)（如氟、氰基、胺或者短鏈烷烴）。而在藥物結(jié)構(gòu)中，C-H鍵上的氫被甲基取代后，有助于提高藥物的結(jié)合親和力、生物利用度、代謝穩(wěn)定性，改變藥物的藥代動(dòng)力學(xué)，從而被藥物化學(xué)家稱(chēng)為“神奇的甲基效應(yīng)”或者“魔幻的甲基效應(yīng)”。</p><p style="text-indent:25px">THF自身可縮聚（經(jīng)陽(yáng)離子引發(fā)開(kāi)環(huán)再聚合）成聚四亞甲基醚二醇（PTMEG），也稱(chēng)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(qiáng)度高的特種橡膠；與對(duì)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(duì)分子質(zhì)量為2000的PTMEG與對(duì)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(jī)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(shí)別添加劑）。THF還可用做合成革的表面處理劑。甲基呋喃也可用于合成戊二烯、戊二醇、乙酰丙醇及酮類(lèi)和2-甲基四氫呋喃。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="紹興2-甲基四氫呋喃生產(chǎn)廠家排行榜,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624039166387/6007011.png"></div><p style="text-indent:25px">聚四氫呋喃生產(chǎn)過(guò)程中分子量控制的影響因素，聚合反應(yīng)工序，在這一關(guān)鍵步驟中，THF、**(ACAN)、和醋酸(HAC) 被連續(xù)加入聚合反應(yīng)器中反應(yīng)生成PTMEA，聚合轉(zhuǎn)化率通常約28%～30%。聚合產(chǎn)品PTMEA 的聚合分子量由**/四氫呋喃比率(ACAN/THF)與及THF 循環(huán)回路系統(tǒng)中醋酸的含量所控制。然后，通過(guò)THF 分離塔、醋酸汽提塔對(duì)PTMEA 分離提純。反應(yīng)器產(chǎn)品物料中有未反應(yīng)的THF、ACAN、及HAC返回至反應(yīng)器循環(huán)再使用。催化劑截留其中，同時(shí)將產(chǎn)品及其反應(yīng)熱移出。甲醇化處理之目的是將PTMEA 轉(zhuǎn)化為PTMEG，這一轉(zhuǎn)化是經(jīng)與甲醇反應(yīng)通過(guò)酯-醇交換實(shí)現(xiàn)的。PTMEA、甲醇、和甲醇鈉被加入反應(yīng)精餾塔中，產(chǎn)物PTMEG及一些殘余甲醇和甲醇鈉在反應(yīng)精餾塔塔底提出，通過(guò)甲醇閃蒸塔、甲醇分離塔將甲醇分離除去。反應(yīng)精餾塔塔頂物料含甲醇和醋酸甲酯，通過(guò)共沸精餾塔將醋酸甲酯和甲醇分離，醋酸甲酯回收作副產(chǎn)品出售，甲醇返回到循環(huán)甲醇貯槽。四氫呋喃在儲(chǔ)存時(shí)容易變成過(guò)氧化物。紹興2-甲基四氫呋喃生產(chǎn)廠家排行榜</p><p style="text-indent:25px">甲基四氫呋喃容易冷凝回收，揮發(fā)損失少，大氣污染小。紹興2-甲基四氫呋喃生產(chǎn)廠家排行榜</p><p style="text-indent:25px">聚四氫呋喃二醇是由四氫呋喃（ＴＨＦ）在陽(yáng)離子引發(fā)下開(kāi)環(huán)聚合而得到的均聚醚，它含有醚鍵，又有相當(dāng)多的規(guī)整排列的亞甲基，以伯羥基為端基，主要用作聚氨酯彈性體的軟段，是聚氨酯的較好原料。非聚氨酯用途包括共聚酯彈性體、聚醚酰胺工程塑料。ＰＴＭＥＧ型聚氨酯彈性體具有較高模量和強(qiáng)度，優(yōu)異的耐水解、耐磨、耐霉菌、耐油性、動(dòng)態(tài)力學(xué)性能、電絕緣性能和低溫柔性等性能，它具有通常的聚酯型聚氨酯彈性體所不能達(dá)到的某些特性，特別是良好的耐水性。PTMEG是一種常用的特種聚醚多元醇，用于注射及擠出熱塑性聚氨酯彈性體（TPU）、澆注型聚氨酯彈性體、聚氨酯纖維紡絲、混煉型聚氨酯彈性體等制造工藝，特別適合用于氨綸、汽車(chē)配件、電纜、薄膜、織物涂層、合成革、醫(yī)療器材、高性能膠輥、耐油密封件、膠黏劑、金屬部件耐磨內(nèi)襯、體育運(yùn)動(dòng)制品，以及用于水下、地下、礦井及低溫場(chǎng)合的制品。彈性體多用于耐水解要求高的場(chǎng)合。紹興2-甲基四氫呋喃生產(chǎn)廠家排行榜</p><p style="text-indent:25px">上海蔚云化工有限公司主營(yíng)品牌有巴斯夫陶氏，發(fā)展規(guī)模團(tuán)隊(duì)不斷壯大，該公司貿(mào)易型的公司。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。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(hù)的歡迎。上海蔚云化工自成立以來(lái)，一直堅(jiān)持走正規(guī)化、專(zhuān)業(yè)化路線，得到了廣大客戶(hù)及社會(huì)各界的普遍認(rèn)可與大力支持。</p></p><br /><p>文章來(lái)源地址: 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