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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)品關鍵詞：</span>常州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>2020-11-09 04:21:46</p><p><span id="click" >瀏覽次數(shù)：4次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="39z7qxe" 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="cb88mel" class="page-proshow02"><p class="title">詳細說明</p><div id="lv8o9pb" class="box"><p><p style="text-indent:25px">四氫呋喃與水能混溶，并常含有少量水分及過氧化物。如要制得無水四氫呋喃，可用氫化鋁鋰在隔絕潮氣下回流（通常1000mL約需2~4g氫化鋁鋰）除去其中的水和過氧化物，然后蒸餾，收集66℃的餾分蒸餾時不要蒸干，將剩余少量殘液即倒出Chemicalbook）。精制后的液體加入鈉絲并應在氮氣氛中保存。處理四氫呋喃時，應先用小量進行試驗，在確定其中只有少量水和過氧化物，作用不致過于激烈時，常州2-甲基四氫呋喃廠商哪家好，方可進行純化。四氫呋喃中的過氧化物可用酸化的碘化鉀溶液來檢驗。如過氧化物較多，應另行處理為宜。HF是一種重要的有機合成原料且是性能優(yōu)良的溶劑，常州2-甲基四氫呋喃廠商哪家好，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，常州2-甲基四氫呋喃廠商哪家好、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。甲基四氫呋喃主要用作樹脂、橡膠、乙基纖維素等。常州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="常州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">四氫呋喃聚合生產(chǎn)聚四亞甲基醚二醇催化劑制備技術，多級孔硅鋁復合氧化物聚合催化劑，實現(xiàn)了PTMEG產(chǎn)品的分子量大小及分子量分布的調控。與國外粘土催化劑相比，四氫呋喃轉化率由30~40%提高到38%~45%之間；獲得了以SiO2改性Al2O3為載體的負載Pd加氫脫色催化劑，在羰基高選擇性加氫的同時避免了加氫過程中PTMEG分子中C-O-C鍵的斷裂，產(chǎn)品收率提高到99%以上，色度由原來的30 APHA，降低至3個色號以下；基于項目的研究，形成了聚合與加氫脫色催化劑工業(yè)規(guī)模制備技術，編制了200 t/a催化劑制備與催化反應工藝完整的工藝包，建成了催化劑制備與反應工藝示范工程，具備了50 t/a催化劑生產(chǎn)能力。常州2-甲基四氫呋喃廠商哪家好四氫呋喃具有低毒、低沸點、流動性好等特點。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="常州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/637389623944439837/8611025.png"></div><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，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，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-羥甲基糠醛向目標產(chǎn)物的轉化，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，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。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。</p><p style="text-indent:25px">聚四氫呋喃生產(chǎn)過程中分子量控制的影響因素，聚合反應工序，在這一關鍵步驟中，THF、**(ACAN)、和醋酸(HAC) 被連續(xù)加入聚合反應器中反應生成PTMEA，聚合轉化率通常約28%～30%。聚合產(chǎn)品PTMEA 的聚合分子量由**/四氫呋喃比率(ACAN/THF)與及THF 循環(huán)回路系統(tǒng)中醋酸的含量所控制。然后，通過THF 分離塔、醋酸汽提塔對PTMEA 分離提純。反應器產(chǎn)品物料中有未反應的THF、ACAN、及HAC返回至反應器循環(huán)再使用。催化劑截留其中，同時將產(chǎn)品及其反應熱移出。甲醇化處理之目的是將PTMEA 轉化為PTMEG，這一轉化是經(jīng)與甲醇反應通過酯-醇交換實現(xiàn)的。PTMEA、甲醇、和甲醇鈉被加入反應精餾塔中，產(chǎn)物PTMEG及一些殘余甲醇和甲醇鈉在反應精餾塔塔底提出，通過甲醇閃蒸塔、甲醇分離塔將甲醇分離除去。反應精餾塔塔頂物料含甲醇和醋酸甲酯，通過共沸精餾塔將醋酸甲酯和甲醇分離，醋酸甲酯回收作副產(chǎn)品出售，甲醇返回到循環(huán)甲醇貯槽。呋喃類是一類化學合成藥。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="常州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/637389624016490617/6540095.png"></div><p style="text-indent:25px">侵入途徑：吸入、食入、經(jīng)皮吸收。健康危害：本品具有刺激和麻醉作用。吸入后引起上呼吸道刺激、惡心、頭暈、***和系統(tǒng)控制。能引起肝、腎損害。液體或高濃度蒸氣對眼有刺激性。皮膚長期反復接觸，可因脫脂作用而發(fā)生皮炎；環(huán)境危害：對水生生物有毒性。燃爆危險：極易燃，其蒸氣與空氣混合，能形成性混合物。急救措施。皮膚接觸：脫去污染的衣著，用肥皂水和清水徹底沖洗皮膚。如有不適感，就醫(yī)眼睛接觸：提起眼瞼，用流動清水或生理鹽水徹底沖洗10-15min。吸入：迅速脫離現(xiàn)場至空氣新鮮處。保持呼吸道通暢。如呼吸困難，給屬氧。呼吸、心跳停止，立即進行心肺復蘇術。就醫(yī)食入：漱口。如有不適感。就醫(yī)消防措施危險特性：其蒸氣與空氣可形成性混合物，遇明火、高熱及強氧化劑易引起燃燒。接觸空氣活在光照條件下可生成具有潛在危險性的過氧化物。與酸類接觸能發(fā)生反應。與氫氧化鉀、氫氧化鈉反應劇烈。蒸氣比空氣重，沿地面擴散并易積存于低洼處，遇火源會著火回燃。甲基常出現(xiàn)在各種有機化合物中。上海2-甲基四氫呋喃生產(chǎn)線</p><p style="text-indent:25px">THF經(jīng)硫化氫處理生成四氫硫酚，可作燃料氣中的臭味劑。常州2-甲基四氫呋喃廠商哪家好</p><p style="text-indent:25px">四氫呋喃是一種重要的有機化工及精細化工原料，普遍應用于樹脂溶劑（磁帶涂層、PVC表面涂層、清洗PVC反應器、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聚合物）；化學中間產(chǎn)物（聚合生成PTMEG、天然氣加味劑）；色譜溶劑（凝膠滲透色譜法）。聚四氫呋喃主要用作嵌段聚氨酯或嵌段聚醚聚酯的軟鏈段。由平均分子量為1000的聚四氫呋喃制得的嵌段聚氨酯橡膠，可用作輪胎、傳動帶、墊圈等;也可用于涂料、人造革、薄膜等。制得的嵌段聚醚聚酯為熱塑性彈性體。平均分子量為2000的聚四氫呋喃，可用以制聚氨酯彈性纖維。由聚四氫呋喃制成的嵌段聚氨酯具有良好的抗凝血性，可用作醫(yī)用高分子材料。常州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專注技術創(chuàng)新和產(chǎn)品研發(fā)，發(fā)展規(guī)模團隊不斷壯大。一批專業(yè)的技術團隊，是實現(xiàn)企業(yè)戰(zhàn)略目標的基礎，是企業(yè)持續(xù)發(fā)展的動力。上海蔚云化工有限公司主營業(yè)務涵蓋環(huán)戊酮，甲基異丙基酮，丙二胺，二甘醇胺，堅持“質量保證、良好服務、顧客滿意”的質量方針，贏得廣大客戶的支持和信賴。公司深耕環(huán)戊酮，甲基異丙基酮，丙二胺，二甘醇胺，正積蓄著更大的能量，向更廣闊的空間、更寬泛的領域拓展。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/1910899.html</p></div></div></div></div></div><div id="crtqnub" class="page-right twoColRt"><div id="xmegyfr" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="mbyahoa" class="recomPic likePro"><a 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