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onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="hqszw24" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shweiyun/637389623991305064/1986424.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="3r8pgvr" class="content"><p><span>需求數(shù)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(chǎn)品關(guān)鍵詞：</span>2-甲基四氫呋喃廠家定做,2-甲基四氫呋喃</p><p><span>***更新：</span>2020-12-07 01:18:39</p><p><span id="click" >瀏覽次數(shù)：2次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="imol88i" 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: </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="m8mb77g" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="lfmedeq" class="box"><p><p style="text-indent:25px">5-二取代的四氫呋喃類混合物的制備方法，包括：在多相醚化催化劑、多相氫化催化劑和氫氣存在的條件下，2-甲基四氫呋喃廠家定做，將5-羥甲基糠醛或5-羥甲基糠醛的水溶液與醇混合后發(fā)生醚化還原反應(yīng)得到的液態(tài)中間產(chǎn)物；然后再在第二催化劑的作用下，使得到的液態(tài)中間產(chǎn)物發(fā)生加氫反應(yīng)，得到2，5-二取代的四氫呋喃類混合物。該制備方法通過兩步法實現(xiàn)5-羥甲基糠醛向目標(biāo)產(chǎn)物的轉(zhuǎn)化，得到的2，5-二取代的四氫呋喃類混合物可作為潛在的燃料或者燃料添加劑。含有四氫呋喃的藥物共有13個。這些藥物涵蓋心血管疾病，傳染病，泌尿系統(tǒng)疾病，ai癥和糖尿病等多種***領(lǐng)域。這些藥物中的四氫呋喃都含有手性中心，其中特拉唑嗪和阿夫唑嗪為外消旋體。另外，2-甲基四氫呋喃廠家定做，有4種藥物含有兩個四氫呋喃環(huán)，包括地瑞那韋、異山梨醇二硝酸酯、異山梨醇單硝酸酯，2-甲基四氫呋喃廠家定做。天然產(chǎn)物包括伊維菌素、依前列醇及軟海綿素B的合成類似物艾日布林。泊沙康唑含有一個季碳手性中心，其抗***效果優(yōu)于早期的酮康唑等抗***藥，它對曲霉菌以及對先前的抗***藥具有抗性的其它******均有效。醫(yī)學(xué)可用于合成維生素B1、磷酸氯喹和磷酸伯氨喹等。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="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-甲基四氫呋喃是一種有機化合物，分子式是C5H10O。外觀與性狀：透明,無色液體，密度：0.86 g/mL at 25 °C。熔點：-136 °C 凝固點：-136℃。沸點：78-80 °C，折射率：n** 1.406。儲存條件：庫房通風(fēng)低溫干燥,與氧化劑、酸類分開存放。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,主要的產(chǎn)品是乙酰丙醇(見00420),但也可回收得到副產(chǎn)品2-甲基四氫呋喃。本品主要用作樹脂、橡膠、乙基纖維素等的溶劑；用它提取脂肪族酸類，要比一般所用的低沸點溶劑好，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、磷酸氯喹等。鎮(zhèn)江2-甲基四氫呋喃定制四氫呋喃分子是由4個C原子、8個H原子和1個O原子組成的。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="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">試劑和儀器，試劑：所用試劑均為分析純試劑；儀器：循環(huán)水泵、電動攪拌器、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。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，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。反應(yīng)中監(jiān)控油珠分散情況，隨時調(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0.5~0.7mm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。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)過程中定時取樣，測定樹脂交換量，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。</p><p style="text-indent:25px">2-甲基呋喃可用于溶液聚合中作溶劑使用，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。在醫(yī)藥工業(yè)中，可用于合成維生素B1、磷酸氯喹和磷酸伯氨喹等。包裝類型：180公斤鍍鋅桶，或ISO Tank,20噸/罐，也可根據(jù)客戶要求包裝。儲存方式：儲存于陰涼、干燥、通風(fēng)良好的庫房。遠(yuǎn)離火種、熱源。防止陽光直射。包裝密封。與氧化劑、酸類分開存放。產(chǎn)品運輸：運輸過程中應(yīng)有遮蓋物，確保包裝不泄露、不倒塌、不墜落、不損壞，防止猛烈撞擊，不得與還原性物質(zhì)混運。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="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/637389624097545321/7454619.png"></div><p style="text-indent:25px">二氯丁烯法以1，4-二氯丁烯為原料，經(jīng)水解生成丁烯二醇，再經(jīng)催化加氫而得。1，4-二氯丁烯在氫氧化鈉溶液中水解，110℃下生成丁烯二醇，離心分離去掉氯化鈉，濾液在蒸發(fā)結(jié)晶器中濃縮，分離出堿金屬羧酸鹽，再在蒸餾塔中除去高沸物。將精制后的丁烯二醇送入反應(yīng)器，以鎳為催化劑，在80～120℃及一定壓力下，丁烯二醇加氫生成丁二醇，蒸餾后進(jìn)人環(huán)合反應(yīng)器，在常壓及120～140℃下于酸性介質(zhì)中生成粗四氫呋喃，蒸餾脫水和脫高沸物，之后蒸餾得高純四氫呋喃。此法操作簡便，條件溫和，收率高，催化劑用量少，可連續(xù)使用。甲基，化學(xué)式為-CH?，由碳和氫元素組成。衢州2-甲基四氫呋喃什么品牌比較好</p><p style="text-indent:25px">甲基四氫呋喃容易冷凝回收，揮發(fā)損失少，大氣污染小。2-甲基四氫呋喃廠家定做</p><p style="text-indent:25px">聚四亞甲基醚二醇，又稱聚(四氫呋喃)，簡稱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、運動裝和襪類。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，是特種橡膠的原料，可以用來制作航空軟管、升降機輪胎、工業(yè)膠帶、運動鞋、醫(yī)用假體等。其他領(lǐng)域PTMEG具有強度高、彈性好、耐霉變等優(yōu)點，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)。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是一家化工產(chǎn)品（除危險化學(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)的項目，經(jīng)相關(guān)部門批準(zhǔn)后方可開展經(jīng)營活動】的公司，致力于發(fā)展為創(chuàng)新務(wù)實、誠實可信的企業(yè)。上海蔚云化工作為化工產(chǎn)品（除危險化學(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)的項目，經(jīng)相關(guān)部門批準(zhǔn)后方可開展經(jīng)營活動】的企業(yè)之一，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。上海蔚云化工不斷開拓創(chuàng)新，追求出色，以技術(shù)為先導(dǎo)，以產(chǎn)品為平臺，以應(yīng)用為重點，以服務(wù)為保證，不斷為客戶創(chuàng)造更高價值，提供更優(yōu)服務(wù)。上海蔚云化工始終關(guān)注化工行業(yè)。滿足市場需求，提高產(chǎn)品價值，是我們前行的力量。</p></p><br /><p>文章來源地址: http://m.cdcfah.com/cp/2294746.html</p></div></div></div></div></div><div id="hwd2fwd" class="page-right twoColRt"><div id="lvcuw2g" class="box01 margin10 clearfix"><h3><a href="http://m.cdcfah.com/cp/">猜你喜歡</a></h3><div 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