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class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="wqn428d" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624164107853/4550822.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="o2xu9bv" 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>衢州2-甲基四氫呋喃直銷公司有哪些,2-甲基四氫呋喃</p><p><span>***更新：</span>2021-01-23 07:14:55</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="k337y4x" 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="g2n2oif" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="wt37nht" class="box"><p><p style="text-indent:25px">四氫呋喃性狀：無(wú)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(jué)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介電常回?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，衢州2-甲基四氫呋喃直銷公司有哪些.1蒸發(fā)熱(66℃)/(KJ/Kg)410極限/%(體積)2，衢州2-甲基四氫呋喃直銷公司有哪些，衢州2-甲基四氫呋喃直銷公司有哪些.3-11.8較小引燃能量/mJ0.5。四氫呋喃是一種重要的有機(jī)化工及精細(xì)化工原料。衢州2-甲基四氫呋喃直銷公司有哪些</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="衢州2-甲基四氫呋喃直銷公司有哪些,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624164107853/4550822.png"></div><p style="text-indent:25px">丙烯酸四氫呋喃酯的合成量取100mL上述自制固體酸催化劑裝入反應(yīng)精餾裝置的反應(yīng)管中，催化劑床層上下方均裝填石英砂作為保溫、支撐層。取摩爾比1.2：1的丙烯酸和四氫糠醇，以兩倍質(zhì)量的甲苯稀釋，稀釋液中加入0.01%的對(duì)苯二酚作為阻聚劑，攪拌至對(duì)苯二酚完全溶解，放置備用。設(shè)置反應(yīng)精餾裝置預(yù)熱器溫度85℃，設(shè)置催化劑床層上口溫度85℃，下口溫度110℃，設(shè)置體系壓力80KPa，將上述原料溶液以一定流速連續(xù)輸入到反應(yīng)器，經(jīng)預(yù)熱器預(yù)熱后到達(dá)反應(yīng)器頂部，自然流下在催化劑床層進(jìn)行酯化反應(yīng)。反應(yīng)中生成的水和溶劑甲苯形成共沸物從反應(yīng)器頂部抽出，冷凝后進(jìn)入分水器，甲苯回流入反應(yīng)器，水定期采出。反應(yīng)體系穩(wěn)定一小時(shí)后取樣分析，以GCMS-QP 2010 SE氣質(zhì)聯(lián)用儀進(jìn)行定性分析，GC-2010 Plus氣相色譜儀進(jìn)行定量分析。四氫糠醇轉(zhuǎn)化率99%，單酯選擇性97%。粗產(chǎn)品濃縮后，將殘留溶劑和過(guò)量丙烯酸蒸出后得到成品，為透明接近無(wú)色的液體，收率97%（以四氫糠醇計(jì)），酯含量99%，酸值0.2（mgKOH/g），水分0.05%，鉑鈷色號(hào)小于20，指標(biāo)均達(dá)到產(chǎn)品標(biāo)準(zhǔn)要求。衢州2-甲基四氫呋喃直銷公司有哪些甲基呋喃也可用于合成戊二烯、戊二醇、乙酰丙醇及酮類和2-甲基四氫呋喃。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="衢州2-甲基四氫呋喃直銷公司有哪些,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624016490617/6540095.png"></div><p style="text-indent:25px">呋喃類藥是一類化學(xué)合成藥。能作用于細(xì)菌的酶系統(tǒng)，干擾細(xì)菌的糖代謝而有抑菌作用。使用的呋喃類藥物有10余種，較常用的有呋喃妥因、呋喃唑酮、呋喃西林等，臨床上因呋喃西林易引起多發(fā)性神經(jīng)炎，故只供外用。呋喃妥因（呋喃啶）***范圍較廣，對(duì)多種革蘭氏陽(yáng)、陰性細(xì)菌均有控制作用，但對(duì)綠膿桿菌無(wú)效。吸收后由尿排泄，常用于***泌尿系***。細(xì)菌對(duì)本品不易產(chǎn)生耐藥性?？煽诜盟?。注意：腎功能不全者慎用。過(guò)敏反應(yīng)可致胸悶、氣喘等?？砂l(fā)生周圍神經(jīng)炎，表現(xiàn)為手足麻木及肌萎縮。中毒性精神癥狀則為幻視、幻聽(tīng)等。胃腸道反應(yīng)、溶血性貧血及肺部并發(fā)癥也能發(fā)生。呋喃唑酮（痢特靈）***譜和呋喃啶相似，對(duì)消化道的多種細(xì)菌有控制作用，也可控制滴蟲?？诜蛰^少，主要在腸道起作用，主治腸炎、痢疾和傷寒等。對(duì)幽門螺旋菌有控制作用，故可用于***潰瘍病。可口服用藥。注意：常見(jiàn)胃腸反應(yīng)；常有遲發(fā)性皮疹、等反應(yīng)；也可發(fā)生肺浸潤(rùn)、***、直立性低血壓、低血糖等反應(yīng)。本品可引起多發(fā)性神經(jīng)炎，每日量超過(guò)0.4克或總量超過(guò)3克時(shí)較易發(fā)生，癥狀可遷延至數(shù)月或一年以上，故應(yīng)密切控制用量。新生兒或先天缺少血球保護(hù)酶者可致溶血性貧血。</p><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)。甲基四氫呋喃主要用作樹(shù)脂、橡膠、乙基纖維素等。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="衢州2-甲基四氫呋喃直銷公司有哪些,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624080435939/3968180.png"></div><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53.2 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，斷裂伸長(zhǎng)率為125%，優(yōu)于HTPB基聚異噁唑啉彈性體。甲基四氫呋喃容易冷凝回收，揮發(fā)損失少，大氣污染小。衢州2-甲基四氫呋喃直銷公司有哪些</p><p style="text-indent:25px">四氫呋喃是一個(gè)雜環(huán)有機(jī)化合物。衢州2-甲基四氫呋喃直銷公司有哪些</p><p style="text-indent:25px">四氫呋喃普遍用于表面涂料，保護(hù)性涂料，油墨，萃取劑和人造革的表面處理，也專是制藥行業(yè)的主要溶屬劑。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）；色譜溶劑（凝膠滲透色譜法）。四氫呋喃也是生產(chǎn)聚四亞甲基醚二醇重要原料，并用于天然氣加味。是一種重要的有機(jī)合成原料且是性能優(yōu)良的溶劑，特別適用于溶解PVC、聚偏氯乙烯和丁苯胺，普遍用作表面涂料、防腐涂料、印刷油墨、磁帶和薄膜涂料的溶劑，并用作反應(yīng)溶劑，用于電鍍鋁液時(shí)可任意控制鋁層厚度且光亮。衢州2-甲基四氫呋喃直銷公司有哪些</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/2973492.html</p></div></div></div></div></div><div id="8u3lxzg" class="page-right twoColRt"><div id="7udrqco" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="mwgz98h" 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" alt="福建ZF配件哪家強(qiáng) 信息推薦自業(yè)物資供應(yīng)" class="vcenter" 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