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class="leftbox clearfix"><h1>無錫2-甲基四氫呋喃廠商哪家好上海蔚云化工供應(yīng)</h1><div id="8jbdaco" class="proBig"><div id="cmoq74m" 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="8ubyvcz" 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="zoqiprt" 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>無錫2-甲基四氫呋喃廠商哪家好,2-甲基四氫呋喃</p><p><span>***更新：</span>2020-11-07 04:22:20</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="va2fxeg" 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="rgda7s3" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="kovnp7y" class="box"><p><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，無錫2-甲基四氫呋喃廠商哪家好，無錫2-甲基四氫呋喃廠商哪家好，無錫2-甲基四氫呋喃廠商哪家好，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，通過簡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。四氫呋喃可以通過氫氧化鈉置于密封瓶中在暗處保存。無錫2-甲基四氫呋喃廠商哪家好</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="無錫2-甲基四氫呋喃廠商哪家好,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624080435939/3968180.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)化酶控制劑馬來酸依那普利合成中的應(yīng)用馬來酸依那普利，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*分離方便，而且所得的鋰。無錫2-甲基四氫呋喃廠家供應(yīng)甲烷分子中去掉一個(gè)氫原子后剩下的電中性的一價(jià)基團(tuán)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="無錫2-甲基四氫呋喃廠商哪家好,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624064664530/9526363.png"></div><p style="text-indent:25px">堿和過渡態(tài)金屬的配位，可對分子結(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)與其他過渡態(tài)金屬催化過程基本一致，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)，再通過碳酸銀氧化為Co(Ⅲ)，從而完成催化循環(huán)。</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(qiáng)通風(fēng)。呼吸系統(tǒng)防護(hù)：空氣中濃度較高時(shí)，應(yīng)該佩戴防毒面具。眼睛防護(hù)：戴化學(xué)安全防護(hù)眼鏡。身體防護(hù)：穿防靜電工作服。手防護(hù)：戴防護(hù)手套。其他防護(hù)：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。粘性：溶解性：微溶于水，可混溶于多數(shù)有機(jī)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(qiáng)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)。四氫呋喃用作溶劑、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="無錫2-甲基四氫呋喃廠商哪家好,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624283199578/5832986.png"></div><p style="text-indent:25px">工藝使用自制的陽離子交換樹脂作為固體酸催化劑，該款樹脂熱穩(wěn)定性高，高溫使用流失少，使用壽命長。反應(yīng)完成后，反應(yīng)液無催化劑殘留，后處理簡單，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。甲基四氫呋喃容易冷凝回收，揮發(fā)損失少，大氣污染小。無錫2-甲基四氫呋喃廠家供應(yīng)</p><p style="text-indent:25px">甲基和DNA結(jié)合過程叫甲基化。無錫2-甲基四氫呋喃廠商哪家好</p><p style="text-indent:25px">四氫呋喃性狀：無色液體，有與醚類似的氣味。能與水和有機(jī)溶劑相混溶，易燃。四氫呋喃在強(qiáng)氧化劑高錳酸鉀的作用下會(huì)發(fā)生反應(yīng)生成丁二酸；檢測殘留四氫呋喃的方法感覺用儀器分析，如氣、液相色譜；四氫呋喃是一種性質(zhì)比較穩(wěn)定的常用的有機(jī)溶劑，也可用于化工產(chǎn)品生產(chǎn)原料。四氫呋喃的沸點(diǎn)是分子量72.11相對dao密度（du20℃/4℃dao）0.8892凝固點(diǎn)/℃-108.5沸點(diǎn)/℃65.4閃點(diǎn)（閉口）/℃17.2折光率（20℃）1.407介電?；?cái)?shù)（25℃）7.58偶極矩/(10^-30C·答m)5.70,5.67表面張力/(mN/m)26.4黏度(20℃)/mPa·s0.55臨界溫度/℃26.8臨界壓力/MPa5.19蒸氣壓(15℃)/kPa15.2 蒸氣相對密度（空氣=1）2.5燃點(diǎn)/℃321.1蒸發(fā)熱(66℃)/(KJ/Kg)410極限/%(體積)2.3-11.8較小引燃能量/mJ0.5。無錫2-甲基四氫呋喃廠商哪家好</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。在上海蔚云化工近多年發(fā)展歷史，公司旗下現(xiàn)有品牌巴斯夫陶氏等。公司不**提供專業(yè)的化工產(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)部門批準(zhǔn)后方可開展經(jīng)營活動(dòng)】，同時(shí)還建立了完善的售后服務(wù)體系，為客戶提供良好的產(chǎn)品和服務(wù)。上海蔚云化工有限公司主營業(yè)務(wù)涵蓋環(huán)戊酮，甲基異丙基酮，丙二胺，二甘醇胺，堅(jiān)持“質(zhì)量保證、良好服務(wù)、顧客滿意”的質(zhì)量方針，贏得廣大客戶的支持和信賴。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/1882843.html</p></div></div></div></div></div><div id="qahoa87" class="page-right twoColRt"><div id="yhegi8m" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="a223x4s" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img 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