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class="home-main container clearfix"><div id="1i4d4cz" class="twoCol"><div id="6utvxzl" 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>?鹽城2-甲基四氫呋喃廠家定做上海蔚云化工供應(yīng)</p><div id="6q9lfbi" class="leftbox clearfix"><h1>鹽城2-甲基四氫呋喃廠家定做上海蔚云化工供應(yīng)</h1><div id="smjwdkm" class="proBig"><div id="gkcegnk" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shweiyun/637389623884264046/3770351.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="i8nt7p8" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shweiyun/637389623884264046/3770351.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="jskm2xm" 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>鹽城2-甲基四氫呋喃廠家定做,2-甲基四氫呋喃</p><p><span>***更新：</span>2020-11-07 06:22:08</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="esprofh" 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(huà): </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(xiàn)] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="rkholxe" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="qzgdfhj" class="box"><p><p style="text-indent:25px">2-甲基四氫呋喃是一種有機(jī)化合物，分子式是C5H10O。外觀與性狀：透明,無(wú)色液體，密度：0.86 g/mL at 25 °C。熔點(diǎn)：-136 °C 凝固點(diǎn)：-136℃。沸點(diǎn)：78-80 °C，鹽城2-甲基四氫呋喃廠家定做，折射率：n** 1.406。儲(chǔ)存條件：庫(kù)房通風(fēng)低溫干燥,與氧化劑、酸類(lèi)分開(kāi)存放。由2-甲基呋喃催化加氫而得。當(dāng)催化加氫反應(yīng)采用氯化鈀催化劑時(shí),主要的產(chǎn)品是乙酰丙醇(見(jiàn)00420),但也可回收得到副產(chǎn)品2-甲基四氫呋喃。本品主要用作樹(shù)脂、橡膠、乙基纖維素等的溶劑；用它提取脂肪族酸類(lèi)，要比一般所用的低沸點(diǎn)溶劑好，在鈾的冶煉工業(yè)上也相當(dāng)重要。在制藥工業(yè)中可合成抗痔藥磷酸伯氨奎，鹽城2-甲基四氫呋喃廠家定做，鹽城2-甲基四氫呋喃廠家定做、磷酸氯喹等。四氫呋喃是一種無(wú)色、可與水混溶。鹽城2-甲基四氫呋喃廠家定做</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="鹽城2-甲基四氫呋喃廠家定做,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389623884264046/3770351.png"></div><p style="text-indent:25px">PTMEA至PTMEG轉(zhuǎn)化的結(jié)果是聚合物料中留下了催化劑甲醇鈉(NaOMe)。要去除催化劑，首先用20%硫酸鎂水溶液與PTMEG中的甲醇鈉中和，反應(yīng)生成氫氧化鎂和硫酸鈉鹽，然后PTMEG 產(chǎn)品物料通過(guò)兩級(jí)干燥過(guò)程將其中所有的氫氧化鎂和硫酸鈉鹽結(jié)晶析出。干燥脫水后的PTMEG 連同結(jié)晶顆粒一起被通過(guò)“板框式”壓濾機(jī)過(guò)濾系統(tǒng)，以去除其中的固體結(jié)晶顆粒。窄化處理工藝過(guò)程部分提供了對(duì)PTMEG 的之后凈化，并通過(guò)去除產(chǎn)品中的低分子量聚合物，對(duì)聚合物產(chǎn)品的分子量（MW）分布進(jìn)行之后的窄化調(diào)整。這是通過(guò)兩級(jí)工藝過(guò)程實(shí)現(xiàn)的。經(jīng)初級(jí)工藝過(guò)程的“真空脫氣”后除去水、氮?dú)獾炔荒龤?，聚合物產(chǎn)品被輸送到短程蒸餾來(lái)完成之后一級(jí)工藝過(guò)程，在此過(guò)程中，低分子聚合被脫除。脫氣和短程蒸餾都備有冷阱用來(lái)凝聚低分子量聚合物。湖州2-甲基四氫呋喃批發(fā)便宜嗎甲基和DNA結(jié)合過(guò)程叫甲基化。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="鹽城2-甲基四氫呋喃廠家定做,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624164107853/4550822.png"></div><p style="text-indent:25px">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。采用鐵桶包裝。貯存在陰涼、通風(fēng)、干燥的倉(cāng)庫(kù)內(nèi)，嚴(yán)禁煙火。搬運(yùn)時(shí)小心輕放，切勿倒置，避免碰撞。按易燃有毒物品規(guī)定貯運(yùn)。鐵桶包裝，凈重１７０ｋｇ／桶。由2-甲基呋喃催化加氫而得。當(dāng)催化加氫反應(yīng)采用氯化鈀催化劑時(shí)，主要的產(chǎn)品是乙酰丙醇（見(jiàn)00420），但也可回收得到副產(chǎn)品2-甲基四氫呋喃。</p><p style="text-indent:25px">工藝使用自制的陽(yáng)離子交換樹(shù)脂作為固體酸催化劑，該款樹(shù)脂熱穩(wěn)定性高，高溫使用流失少，使用壽命長(zhǎng)。反應(yīng)完成后，反應(yīng)液無(wú)催化劑殘留，后處理簡(jiǎn)單，廢水排放少，環(huán)境友好。該工藝采用了反應(yīng)精餾的方式，反應(yīng)過(guò)程中產(chǎn)生的水被及時(shí)帶出反應(yīng)體系，促進(jìn)酯化反應(yīng)平衡的右移，提高了原料的轉(zhuǎn)化率。該工藝采用了連續(xù)生產(chǎn)的方式，避免了大量的人工操作，產(chǎn)品質(zhì)量穩(wěn)定，有利于規(guī)?；a(chǎn)。以自制的固體酸催化合成TFA的工藝路線(xiàn)有較高的工業(yè)應(yīng)用價(jià)值，如能應(yīng)用于實(shí)踐將會(huì)產(chǎn)生良好的經(jīng)濟(jì)效益和社會(huì)效益。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。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="鹽城2-甲基四氫呋喃廠家定做,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389623991305064/1986424.png"></div><p style="text-indent:25px">2-甲基四氫呋喃與其它溶劑相比，MeTHF用作格氏反應(yīng)溶劑具有如下優(yōu)點(diǎn)：與水互溶性小，產(chǎn)品回收相對(duì)比較容易；與THF相比，易于脫水，回收利用方便、成本低；與THF相比，分層界面清晰；特別適用于制備高濃度的溴格氏試劑溶液；獲得高收率的芐基或烯丙基格氏試劑；可在較高溫度下反應(yīng)，且溶劑損耗小。在制藥工業(yè)上的應(yīng)用在化妝品工業(yè)上的應(yīng)用在農(nóng)藥領(lǐng)域的應(yīng)用。芳樟醇/香酮是香水香精、家化產(chǎn)品香精及皂用香精配方中使用頻率較高的香料品種，現(xiàn)在全世界的年用量達(dá)一萬(wàn)多噸，同時(shí)也是合成異植物醇、VE、VK的原料。 THF與水互溶，回收低水份的THF，需要特殊的設(shè)備和較高的能耗費(fèi)用。 2-MeTHF與水的溶解性有限，通過(guò)簡(jiǎn)單的間歇共沸脫水精餾操作，就可以回收水份低于300ppm的2-MeTHF，實(shí)現(xiàn)循環(huán)使用。甲基呋喃可用于溶液聚合中作溶劑使用?；窗?-甲基四氫呋喃報(bào)價(jià)</p><p style="text-indent:25px">四氫呋喃也是生產(chǎn)聚四亞甲基醚二醇重要原料。鹽城2-甲基四氫呋喃廠家定做</p><p style="text-indent:25px">隨著分子遺傳學(xué)的發(fā)展，生物甲基化和微生物抗汞的生態(tài)學(xué)研究已推向分子水平，近年來(lái)開(kāi)展了微生物轉(zhuǎn)化汞的遺傳控制研究。細(xì)菌的抗汞性能受遺傳質(zhì)粒和染色體的調(diào)節(jié)和控制，某些具有抗汞性的細(xì)菌質(zhì)粒有移位的潛力，使不具有抗性的細(xì)菌細(xì)胞獲得抗性。這將進(jìn)一步闡明底泥中細(xì)菌能使汞遷移轉(zhuǎn)化和使廢料中汞實(shí)行再循環(huán)的基礎(chǔ)。為了提高微生物的抗汞能力，有的學(xué)者已應(yīng)用質(zhì)體轉(zhuǎn)移新技術(shù)得到新的質(zhì)粒（MER質(zhì)粒）,細(xì)菌具有這種新質(zhì)粒，抗汞能力可提高40倍左右。鹽城2-甲基四氫呋喃廠家定做</p><p style="text-indent:25px">上海蔚云化工有限公司專(zhuān)注技術(shù)創(chuàng)新和產(chǎn)品研發(fā)，發(fā)展規(guī)模團(tuán)隊(duì)不斷壯大。公司目前擁有較多的高技術(shù)人才，以不斷增強(qiáng)企業(yè)重點(diǎn)競(jìng)爭(zhēng)力，加快企業(yè)技術(shù)創(chuàng)新，實(shí)現(xiàn)穩(wěn)健生產(chǎn)經(jīng)營(yíng)。公司業(yè)務(wù)范圍主要包括：環(huán)戊酮，甲基異丙基酮，丙二胺，二甘醇胺等。公司奉行顧客至上、質(zhì)量為本的經(jīng)營(yíng)宗旨，深受客戶(hù)好評(píng)。公司憑著雄厚的技術(shù)力量、飽滿(mǎn)的工作態(tài)度、扎實(shí)的工作作風(fēng)、良好的職業(yè)道德，樹(shù)立了良好的環(huán)戊酮，甲基異丙基酮，丙二胺，二甘醇胺形象，贏得了社會(huì)各界的信任和認(rèn)可。</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/1885656.html</p></div></div></div></div></div><div id="j22sceb" 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