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tcPro"><section class="home-main container clearfix"><div id="rtj9bdr" class="twoCol"><div id="lltj7jt" class="page-proshow clearfix"><p class="current"> 當前位置:<a href="http://www.cdcfah.com/">首頁?<a href="http://www.cdcfah.com/cp/">產品供應</a>?<a href="http://www.cdcfah.com/cp/first-_huagong/">化工</a>?<a href="http://www.cdcfah.com/cp/second-_sysqm/">實驗室器皿</a>?<a href="http://www.cdcfah.com/cp/third-sysqm_qtsysyp/">其他實驗室用品</a>?上海2-甲基四氫呋喃費用上海蔚云化工供應</p><div id="v7brhdj" class="leftbox clearfix"><h1>上海2-甲基四氫呋喃費用上海蔚云化工供應</h1><div id="jvlr7xl" class="proBig"><div id="j99ndbp" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shweiyun/637389623944439837/8611025.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="hrhxdpd" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shweiyun/637389623944439837/8611025.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="nxfndbh" class="content"><p><span>需求數量：</span>0</p><p><span>價格要求：</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>產品關鍵詞：</span>上海2-甲基四氫呋喃費用,2-甲基四氫呋喃</p><p><span>***更新：</span>2020-11-08 02:21:15</p><p><span id="click" >瀏覽次數：0次</span></p><a rel="nofollow" class="button">聯系我們</a></div></div><div id="3trp99j" 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>網址: </span>http://www.weiyunhuagong.com</p><p><span>手機: </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="r9drpxv" class="page-proshow02"><p class="title">詳細說明</p><div id="tvlj7rz" class="box"><p><p style="text-indent:25px">四氫呋喃是一種重要的有機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，并用作反應溶劑，用于電鍍鋁液時可任意控制鋁層厚度且光亮。四氫呋喃自身可縮聚成聚四亞甲基醚二醇，也稱四氫呋喃均聚醚。PTMEG與甲苯二異氰酸酯制成耐磨、耐油、低溫性能好、強度高的特種橡膠；與對苯二甲酸二甲酯和1,4-丁二醇制成嵌段聚醚聚酯彈性材料。相對分子質量為2000的PTMEG與對亞甲基雙二異氰酸酯制成聚氨酯彈性纖維、特種橡膠和一些特殊用途涂料的原料。在有機合成方面，用于生產四氫噻吩、1，上海2-甲基四氫呋喃費用.2-二氯乙烷、2.3-二氯四氫呋喃、戊內酯，上海2-甲基四氫呋喃費用，上海2-甲基四氫呋喃費用、丁內酯和吡咯烷酮等。在醫(yī)藥工業(yè)方面，THF用于合成咳必清、利復霉素、黃體酮和一些藥。THF經硫化氫處理生成四氫硫酚，可作燃料氣中的臭味劑。THF還可用做合成革的表面處理劑。四氫呋喃可以通過氫氧化鈉置于密封瓶中在暗處保存。上海2-甲基四氫呋喃費用</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海2-甲基四氫呋喃費用,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389623944439837/8611025.png"></div><p style="text-indent:25px">工業(yè)生產較早以糖醛為原料，將糖醛與蒸氣的混合物通入填充鋅-鉻-錳金屬氧化物（或鈀）催化劑的反應器，于400-420℃脫去羰基而成呋喃；然后以骨架鎳為催化劑，于80-120℃呋喃加氫制得四氫呋喃。該法生產1噸四氫呋喃，約需消耗3噸多糖醛。后來發(fā)展的生產方法有許多種，工業(yè)化的方法有1,4-丁二醇催化脫水環(huán)合法，因為丁二醇是由乙炔和甲醛制得的，此法稱雷由法（Reppe法）；利用氯丁橡膠單體氯丁二烯的副產物1,4-二氯丁烯生產四氫呋喃，稱為二氯丁烯法；發(fā)展了以順酐為原料的催化加氫法?？啡┓ǎ河煽啡┟擊驶蛇秽?，再加氫而得?！∵@是工業(yè)上較早生產四氫呋喃的方法之一?？啡┲饕捎衩仔镜绒r副產品水解制造。該法污染嚴重，不利于大規(guī)模生產，已逐步被淘汰。宿遷2-甲基四氫呋喃批發(fā)廠家甲基四氫呋喃是作為綠色溶劑替代四氫呋喃的。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海2-甲基四氫呋喃費用,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624064664530/9526363.png"></div><p style="text-indent:25px">順酐催化加氫法：順酐和氫氣從底部進入內裝鎳催化劑的反應器，產物中四氫呋喃與γ-丁內酯比例可通過調整操作參數加以控制。反應產物與原料氫氣冷卻至50℃左右進入洗滌塔底部，使未反應的氫氣及氣態(tài)與液態(tài)產物分離，未反應的氫氣及氣態(tài)產物經洗滌后循環(huán)到反應器，液態(tài)產物經蒸餾而得四氫呋喃產品。該工藝可在0～(5∶1)范圍內任意調整γ-丁內酯與四氫呋喃的比例，順酐的單程轉化率達99.9%，四氫呋喃選擇性為85%～95%，產品含量達99.97%。該工藝具有催化劑性能好、流程簡單、投資少等特點。4-丁二醇脫水環(huán)化法：其工藝過程為：向反應器中加入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的速度從塔頂得到含有80%四氫呋喃的水溶液。加入50t 1，4-丁二醇后，從反應器中排除約70kg焦質。將焦質進行過濾，得到的硫酸水溶液可以重新使用，這一過程的四氫呋喃收率可以達到99%以上。硫酸是四氫呋喃工業(yè)生產中使用較早的催化劑，也是現今生產中應用較多的催化劑。此工藝技術成熟，工藝比較簡單，反應溫度較低，四氫呋喃收率較高，但硫酸易腐蝕設備，污染環(huán)境。</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，經過加成反應制備出一種含氨基甲酸酯基團的端烯基環(huán)氧乙烷-四氫呋喃共聚醚（AUPET）；通過紅外光譜、核磁共振氫譜、碳譜和凝膠滲透色譜對AUPET的結構進行了表征；采用錐板黏度計測定了其黏度；采用DSC測定了其玻璃化轉變溫度；通過拉伸實驗測定了其與四甲基對苯二腈氧化物（TTNO）固化后所得聚異噁唑啉彈性體的力學性能。結果表明，反應后PET端羥基吸收峰完全消失，出現了烯基和氨基甲酸酯基團的特征峰，聚醚分子鏈未發(fā)生斷裂；AUPET的玻璃化轉變溫度為-69.9℃，20℃時黏度為53.2 Pa·s；AUPET基聚異噁唑啉彈性體室溫下的拉伸強度為1.75 MPa，斷裂伸長率為125%，優(yōu)于HTPB基聚異噁唑啉彈性體。常溫下大多數聚四氫呋喃二醇是白色蠟狀固體。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海2-甲基四氫呋喃費用,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624097545321/7454619.png"></div><p style="text-indent:25px">呋喃類藥是一類化學合成藥。能作用于細菌的酶系統(tǒng)，干擾細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)性神經炎，故只供外用。呋喃妥因（呋喃啶）***范圍較廣，對多種革蘭氏陽、陰性細菌均有控制作用，但對綠膿桿菌無效。吸收后由尿排泄，常用于***泌尿系***。細菌對本品不易產生耐藥性?？煽诜盟?。注意：腎功能不全者慎用。過敏反應可致胸悶、氣喘等?？砂l(fā)生周圍神經炎，表現為手足麻木及肌萎縮。中毒性精神癥狀則為幻視、幻聽等。胃腸道反應、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，對消化道的多種細菌有控制作用，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：常見胃腸反應；常有遲發(fā)性皮疹、等反應；也可發(fā)生肺浸潤、***、直立性低血壓、低血糖等反應。本品可引起多發(fā)性神經炎，每日量超過0.4克或總量超過3克時較易發(fā)生，癥狀可遷延至數月或一年以上，故應密切控制用量。新生兒或先天缺少血球保護酶者可致溶血性貧血。甲基四氫呋喃應與氧化劑等分開存放，切忌混儲。宿遷2-甲基四氫呋喃批發(fā)廠家</p><p style="text-indent:25px">在制藥工業(yè)中可合成抗痔藥磷酸伯氨奎、磷酸氯喹等。上海2-甲基四氫呋喃費用</p><p style="text-indent:25px">四氫呋喃丙烯酸酯是一種重要的特種丙烯酸酯，分子中的環(huán)狀醚基比直鏈醚基更富于活性，醚鍵的α-位碳上的氫也有一定活性，特殊結構賦予其后續(xù)產品特殊的性質。以TFA作為共聚成分的丙烯酸樹脂與氨基樹脂并用時，可在較低溫度（100℃左右）下固化。同時TFA分子價鍵有一定的柔韌性，與其它樹脂并用可以起到增塑的效果。此外，TFA還可以作為單體稀釋劑應用于紫外光（UV）固化產品，其特殊的環(huán)醚結構使其與其它單官能度單體相比對大多數底材具有更好的附著力，同時有著低收縮性、強耐候性、強耐磨性和強耐水性，因此被普遍應用于光固化的粘合劑、涂料、油墨等領域。隨著材料科學的日益發(fā)展，可以預計TFA會有越來越普遍的應用。上海2-甲基四氫呋喃費用</p><p style="text-indent:25px">上海蔚云化工有限公司位于靜安區(qū)靈石路709號55幢A2113室。上海蔚云化工致力于為客戶提供良好的環(huán)戊酮，甲基異丙基酮，丙二胺，二甘醇胺，一切以用戶需求為中心，深受廣大客戶的歡迎。公司秉持誠信為本的經營理念，在化工深耕多年，以技術為先導，以自主產品為重點，發(fā)揮人才優(yōu)勢，打造化工良好品牌。上海蔚云化工秉承“客戶為尊、服務為榮、創(chuàng)意為先、技術為實”的經營理念，全力打造公司的重點競爭力。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/1894073.html</p></div></div></div></div></div><div id="prz9vdb" class="page-right twoColRt"><div id="dh9pnjp" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="1ntrxlj" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img 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