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onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="582gxpo" 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>2-甲基四氫呋喃用途有哪些,2-甲基四氫呋喃</p><p><span>***更新：</span>2020-10-23 04:23:36</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="wh23qs4" 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="hl74hey" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="lkro8p7" class="box"><p><p style="text-indent:25px">試劑和儀器，試劑：所用試劑均為分析純?cè)噭?；儀器：循環(huán)水泵、電動(dòng)攪拌器、旋轉(zhuǎn)蒸發(fā)儀、反應(yīng)精餾裝置、GC-2010 Plus氣相色譜儀，GCMS-QP 2010 SE氣質(zhì)聯(lián)用儀，2-甲基四氫呋喃用途有哪些。固體酸催化劑的制備，在三口燒瓶上裝上高速攪拌器、溫度計(jì)，加入一定量飽和氯化鈉水溶液，加入明膠、聚乙烯醇作為分散劑。開啟攪拌，分散劑均勻分散后，稱量摩爾比為5:1的鄰氯苯乙烯和二乙烯基苯，再取定量液體石臘作為致孔劑和過氧化苯甲酰作為引發(fā)劑加入反應(yīng)器中，升溫開始反應(yīng)，75℃保持12小時(shí)。反應(yīng)中監(jiān)控油珠分散情況，隨時(shí)調(diào)整攪拌速度以控制油珠分散度和顆粒大小。反應(yīng)結(jié)束后緩慢冷卻、過濾，以熱水洗滌并烘干。用石油醚萃取致孔劑，篩分出直徑0，2-甲基四氫呋喃用途有哪些.5~0.7mm的樹脂骨架，以二氯乙烷溶脹。溶脹完成后，在良好攪拌下加入定量濃硫酸，升溫回流并保持5小時(shí)，2-甲基四氫呋喃用途有哪些。蒸出二氯乙烷，加入定量發(fā)煙硫酸，升溫至110℃反應(yīng)。反應(yīng)過程中定時(shí)取樣，測(cè)定樹脂交換量，達(dá)到預(yù)定值后結(jié)束反應(yīng)，降溫。以蒸餾水小心的洗滌樹脂至洗液中性，自然晾干。四氫呋喃是芳香族化合物呋喃的完全氫化產(chǎn)物。2-甲基四氫呋喃用途有哪些</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="2-甲基四氫呋喃用途有哪些,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624064664530/9526363.png"></div><p style="text-indent:25px">甲基，化學(xué)式為-CH?，由碳和氫元素組成。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)。甲基作為一個(gè)化學(xué)基團(tuán)，它能夠結(jié)合在DNA上某些特定部位，這個(gè)甲基和DNA結(jié)合過程叫甲基化，相反，從化合物上脫落的過程叫去甲基化。甲基常出現(xiàn)在各種有機(jī)化合物中,是較常見的基團(tuán)。由于甲基是合成蛋氨酸、肉堿、肌酸、磷脂、腎上腺素，核糖核酸和脫氧核糖核酸等具有主要生理作用的物質(zhì)所必需的基團(tuán)，以及甲基化反應(yīng)在神經(jīng)系統(tǒng)、免疫系統(tǒng)、泌尿系統(tǒng)和心血管系統(tǒng)中所起的作用，人們認(rèn)為生長(zhǎng)期動(dòng)物和成年動(dòng)物都需要穩(wěn)定的甲基供體。一般認(rèn)為動(dòng)物體內(nèi)自身不能合成甲基，需要食物中具有富含甲基物質(zhì)，它們的分子中具有易反應(yīng)的甲基，從而參與動(dòng)物生理功能，這類富含甲基的物質(zhì)稱為“甲基供體”,易參與此反應(yīng)的甲基,是與氮原子或硫原子連在一起的甲基，象甜菜堿、蛋氨酸、膽堿等。常州2-甲基四氫呋喃批發(fā)甲基四氫呋喃重要的是與水分層,在做格式反應(yīng)有很好的應(yīng)用。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="2-甲基四氫呋喃用途有哪些,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389623991305064/1986424.png"></div><p style="text-indent:25px">四氫-2-甲基呋喃;喃;;2-甲基四喃;2-甲基四氫呋喃(METHF);A-甲基四氫呋喃;2-甲基四氫呋喃,大約150-400PPMBHT作為穩(wěn)定劑，C5H10O分子量：86.13安全術(shù)語遠(yuǎn)離火源。不慎與眼睛接觸后，預(yù)防靜電發(fā)生。可能生成性過氧化物。刺激眼睛和呼吸系統(tǒng)?？扇夹晕ｋU(xiǎn)特性：遇明火、高溫、氧化劑易燃;燃燒產(chǎn)生刺激煙霧滅火劑：干粉、干砂、二氧化碳、泡沫、1211滅火劑2一甲基四氫呋喃有毒嗎屬于危險(xiǎn)品毒性分級(jí)：中毒急性毒性：4500 毫克/公斤可燃性危險(xiǎn)特性：遇明火、高溫、氧化劑易燃;燃燒產(chǎn)生刺激煙霧物危險(xiǎn)特性：其蒸氣與空氣可形成性混合物,遇明火、高熱極易燃燒。</p><p style="text-indent:25px">聚四亞甲基醚二醇，又稱聚(四氫呋喃)，簡(jiǎn)稱PTMEG，是一種重要的高分子材料，用途十分普遍。氨綸工業(yè)PTMEG的主要領(lǐng)域是氨綸工業(yè)。氨綸是一種性能優(yōu)良的彈性纖維，主要用于生產(chǎn)內(nèi)衣、泳衣、運(yùn)動(dòng)裝和襪類。彈性體由PTMEG合成的聚氨酯，具有抗水解、耐老化、彈性好、耐磨等優(yōu)點(diǎn)，是特種橡膠的原料，可以用來制作航空軟管、升降機(jī)輪胎、工業(yè)膠帶、運(yùn)動(dòng)鞋、醫(yī)用假體等。其他領(lǐng)域PTMEG具有強(qiáng)度高、彈性好、耐霉變等優(yōu)點(diǎn)，也可以用于合成革制品、輪胎、傳送帶、建筑涂料和地板，以及防護(hù)材料等領(lǐng)域的生產(chǎn)。四氫呋喃并用于天然氣加味。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="2-甲基四氫呋喃用途有哪些,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624016490617/6540095.png"></div><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(jìn)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(jìn)行，而且分層界面清晰。由于MeTHF作溶劑時(shí)，產(chǎn)品分離回收更方便，因而常用作還原胺化和胺的酰化反應(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(diǎn)： 2-MeTHF相對(duì)于CH2Cl2的優(yōu)越性與水微溶，回收方便；對(duì)溶解在DCM中的極性化合物具有很強(qiáng)的溶解性。甲基四氫呋喃容易冷凝回收，揮發(fā)損失少，大氣污染小。麗水2-甲基四氫呋喃銷售公司有哪些</p><p style="text-indent:25px">甲基呋喃可用于溶液聚合中作溶劑使用。2-甲基四氫呋喃用途有哪些</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(cè)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(duì)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(duì)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。2-甲基四氫呋喃用途有哪些</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。公司以用心服務(wù)為重點(diǎn)價(jià)值，希望通過我們的專業(yè)水平和不懈努力，將化工產(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(yíng)活動(dòng)】等業(yè)務(wù)進(jìn)行到底。誠(chéng)實(shí)、守信是對(duì)企業(yè)的經(jīng)營(yíng)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/1669123.html</p></div></div></div></div></div><div id="39giahb" class="page-right twoColRt"><div id="oia38zo" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="pogn7o4" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" 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