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id="azwiaht" class="twoCol"><div id="ed7zbyk" 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>?無(wú)錫2-甲基四氫呋喃廠家供應(yīng) 上海蔚云化工供應(yīng)</p><div id="rvxeqne" class="leftbox clearfix"><h1>無(wú)錫2-甲基四氫呋喃廠家供應(yīng) 上海蔚云化工供應(yīng)</h1><div id="kj2km7g" class="proBig"><div id="x33bicy" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shweiyun/637389623991305064/1986424.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="iekc23k" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shweiyun/637389623991305064/1986424.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="h3jf8pd" 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>無(wú)錫2-甲基四氫呋喃廠家供應(yīng),2-甲基四氫呋喃</p><p><span>***更新：</span>2020-11-13 00:33:30</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="cw23fac" 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="ujls2ub" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="aurogsp" class="box"><p><p style="text-indent:25px">以端羥基環(huán)氧乙烷-四氫呋喃共聚醚（PET）和烯丙基異氰酸酯為原料，二丁基錫二月桂酸酯為催化劑，經(jīng)過(guò)加成反應(yīng)制備出一種含氨基甲酸酯基團(tuán)的端烯基環(huán)氧乙烷-四氫呋喃共聚醚（AUPET）；通過(guò)紅外光譜、核磁共振氫譜、碳譜和凝膠滲透色譜對(duì)AUPET的結(jié)構(gòu)進(jìn)行了表征；采用錐板黏度計(jì)測(cè)定了其黏度；采用DSC測(cè)定了其玻璃化轉(zhuǎn)變溫度；通過(guò)拉伸實(shí)驗(yàn)測(cè)定了其與四甲基對(duì)苯二腈氧化物（TTNO）固化后所得聚異噁唑啉彈性體的力學(xué)性能。結(jié)果表明，反應(yīng)后PET端羥基吸收峰完全消失，出現(xiàn)了烯基和氨基甲酸酯基團(tuán)的特征峰，聚醚分子鏈未發(fā)生斷裂；AUPET的玻璃化轉(zhuǎn)變溫度為-69.9℃，20℃時(shí)黏度為53，無(wú)錫2-甲基四氫呋喃廠家供應(yīng).2 Pa·s；AUPET基聚異噁唑啉彈性體室溫下的拉伸強(qiáng)度為1.75 MPa，無(wú)錫2-甲基四氫呋喃廠家供應(yīng)，斷裂伸長(zhǎng)率為125%，無(wú)錫2-甲基四氫呋喃廠家供應(yīng)，優(yōu)于HTPB基聚異噁唑啉彈性體。2-甲基四氫呋喃可替代苯、甲苯、氯仿等溶劑。無(wú)錫2-甲基四氫呋喃廠家供應(yīng)</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="無(wú)錫2-甲基四氫呋喃廠家供應(yīng),2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389623991305064/1986424.png"></div><p style="text-indent:25px">堿和過(guò)渡態(tài)金屬的配位，可對(duì)分子結(jié)構(gòu)特定位置上的C-H鍵直接活化，同時(shí)導(dǎo)向基團(tuán)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(tuán)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(tuán)。但在生物活***物分子中，因結(jié)構(gòu)復(fù)雜、官能團(tuán)多，因此仍缺乏一種通用的合成方法。以分子內(nèi)的官能團(tuán)作為導(dǎo)向基團(tuán)，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(tuán)配位。鈷催化的甲基化反應(yīng)與其他過(guò)渡態(tài)金屬催化過(guò)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(shí)Co(Ⅲ)經(jīng)還原變?yōu)镃o(I)，再通過(guò)碳酸銀氧化為Co(Ⅲ)，從而完成催化循環(huán)。福建2-甲基四氫呋喃有哪些品牌四氫呋喃可以通過(guò)氫氧化鈉置于密封瓶中在暗處保存。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="無(wú)錫2-甲基四氫呋喃廠家供應(yīng),2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624016490617/6540095.png"></div><p style="text-indent:25px"> 在堿性條件下非常穩(wěn)定、大多數(shù)酸性條件下也穩(wěn)定；與水分層界面非常清晰；與水分層，水在下層；而DCM與水分層，水在上層；用MeTHF作溶劑，產(chǎn)品可在釜內(nèi)脫水，因?yàn)镸eTHF與水形成特殊的共沸物； MeTHF的沸點(diǎn)為80℃，回流冷凝器可用水作為冷卻介質(zhì)。 MeTHF的優(yōu)點(diǎn)：頭孢類藥物頭孢克肟的生產(chǎn) 頭孢克肟，抗藥拉西地平的生產(chǎn) 拉西地平 2-甲基四氫呋喃回收容易 2-甲基四氫呋喃在工業(yè)化生產(chǎn)中的優(yōu)勢(shì)：綜合成本低， 2-甲基四氫呋喃在工業(yè)化生產(chǎn)中的優(yōu)勢(shì) ，環(huán)境影響小，2-甲基四氫呋喃在工業(yè)化生產(chǎn)中的優(yōu)勢(shì)， 2-甲基四氫呋喃能提高加成產(chǎn)物的收率，而THF常常導(dǎo)致還原產(chǎn)物增加而使加成產(chǎn)物的產(chǎn)率降低。</p><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。四氫呋喃可用作溶劑、有機(jī)合成的原料。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="無(wú)錫2-甲基四氫呋喃廠家供應(yīng),2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624097545321/7454619.png"></div><p style="text-indent:25px">四氫呋喃可用作溶劑、有機(jī)合成的原料。在化學(xué)反應(yīng)和萃取時(shí)用做一種中等極性的非質(zhì)子溶劑。四氫呋喃是一種無(wú)色、低粘度的液體，具有類似**的氣味。室溫時(shí)四氫呋喃與水能部分混溶，部分不法試劑商就是利用這一點(diǎn)對(duì)四氫呋喃試劑兌水牟取暴利。四氫呋喃在儲(chǔ)存時(shí)容易變成過(guò)氧化物。因此，商用的四氫呋喃經(jīng)常是用BHT，即2,6-二叔丁基對(duì)甲酚來(lái)防止氧化。四氫呋喃可以通過(guò)氫氧化鈉置于密封瓶中在暗處保存。四氫呋喃是一種重要的有機(jī)化工及精細(xì)化工原料，普遍應(yīng)用于樹(shù)脂溶劑(磁帶涂層、PVC表面涂層、清洗PVC反應(yīng)器、脫除PVC薄膜、玻璃紙涂層、塑料印刷油墨、熱塑性聚氨酯涂層);反應(yīng)溶劑(格式試劑、烷基堿金屬化合物和芳基堿金屬化合物、氫化鋁和氫化硼、甾族化合物和大分子有機(jī)聚合物);化學(xué)中間產(chǎn)物;色譜溶劑凝膠滲。四氫呋喃具有低毒、低沸點(diǎn)、流動(dòng)性好等特點(diǎn)。四氫呋喃是一種重要的有機(jī)合成原料且是性能優(yōu)良的溶劑。福建2-甲基四氫呋喃有哪些品牌</p><p style="text-indent:25px">四氫呋喃是一種常用的中等極性非質(zhì)子性溶劑。無(wú)錫2-甲基四氫呋喃廠家供應(yīng)</p><p style="text-indent:25px">操作注意事項(xiàng)：密閉操作，多方面通風(fēng)。操作人員必須經(jīng)過(guò)專門(mén)培訓(xùn)，嚴(yán)格遵守操作規(guī)程。建議操作人員佩戴過(guò)濾式防毒面具（半面罩），戴安全防護(hù)眼鏡，穿防靜電工作服，戴橡膠耐油手套。遠(yuǎn)離火種、熱源，工作場(chǎng)所嚴(yán)禁吸煙。使用防爆型的通風(fēng)系統(tǒng)和設(shè)備。防止蒸氣泄漏到工作場(chǎng)所空氣中。避免與氧化劑、酸類、堿類接觸。灌裝時(shí)應(yīng)控制流速，且有接地裝置，防止靜電積聚。搬運(yùn)時(shí)要輕裝輕卸，防止包裝及容器損壞。配備相應(yīng)品種和數(shù)量的消防器材及泄漏應(yīng)急處理設(shè)備。倒空的容器可能殘留有害物儲(chǔ)存注意事項(xiàng)：通常商品加有阻聚劑。儲(chǔ)存于陰涼、通風(fēng)的庫(kù)房。遠(yuǎn)離火種、熱源。庫(kù)溫不宜超過(guò)30℃。包裝要求密封，不可與空氣接觸。應(yīng)與氧化劑、酸類、堿類等分開(kāi)存放，切忌混儲(chǔ)。采用防爆型照明、通風(fēng)設(shè)施。禁止使用易產(chǎn)生火花的機(jī)械設(shè)備和工具。儲(chǔ)區(qū)應(yīng)備有泄漏應(yīng)急處理設(shè)備和合適的收容材料。無(wú)錫2-甲基四氫呋喃廠家供應(yīng)</p><p style="text-indent:25px">上海蔚云化工有限公司擁有化工產(chǎn)品（除危險(xiǎn)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(jī)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(kāi)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(xiàng)目，經(jīng)相關(guān)部門(mén)批準(zhǔn)后方可開(kāi)展經(jīng)營(yíng)活動(dòng)】等多項(xiàng)業(yè)務(wù)，主營(yíng)業(yè)務(wù)涵蓋環(huán)戊酮，甲基異丙基酮，丙二胺，二甘醇胺。目前我公司在職員工以90后為主，是一個(gè)有活力有能力有創(chuàng)新精神的團(tuán)隊(duì)。公司以誠(chéng)信為本，業(yè)務(wù)領(lǐng)域涵蓋環(huán)戊酮，甲基異丙基酮，丙二胺，二甘醇胺，我們本著對(duì)客戶負(fù)責(zé)，對(duì)員工負(fù)責(zé)，更是對(duì)公司發(fā)展負(fù)責(zé)的態(tài)度，爭(zhēng)取做到讓每位客戶滿意。公司深耕環(huán)戊酮，甲基異丙基酮，丙二胺，二甘醇胺，正積蓄著更大的能量，向更廣闊的空間、更寬泛的領(lǐng)域拓展。</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/1962393.html</p></div></div></div></div></div><div id="tcz837t" class="page-right twoColRt"><div id="hwdaxel" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="mwnzbi7" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img 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