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href="http://www.cdcfah.com/cp/second-_sysqm/">實(shí)驗(yàn)室器皿</a>?<a href="http://www.cdcfah.com/cp/third-sysqm_qtsysyp/">其他實(shí)驗(yàn)室用品</a>?泰州2-甲基四氫呋喃市場(chǎng)行情上海蔚云化工供應(yīng)</p><div id="xexovho" class="leftbox clearfix"><h1>泰州2-甲基四氫呋喃市場(chǎng)行情上海蔚云化工供應(yīng)</h1><div id="jykmnpb" class="proBig"><div id="xgnzbn7" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624080435939/3968180.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="ui2ovse" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624080435939/3968180.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="jtkmykb" 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>泰州2-甲基四氫呋喃市場(chǎng)行情,2-甲基四氫呋喃</p><p><span>***更新：</span>2020-11-04 05:23:42</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="uyact2n" 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="wl2qn8k" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="qar8qne" class="box"><p><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(duì)眼有刺激性。皮膚長(zhǎng)期反復(fù)接觸，可因脫脂作用而發(fā)生皮炎；環(huán)境危害：對(duì)水生生物有毒性。燃爆危險(xiǎn)：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(dòng)清水或生理鹽水徹底沖洗10-15min。吸入：迅速脫離現(xiàn)場(chǎng)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(jìn)行心肺復(fù)蘇術(shù)，泰州2-甲基四氫呋喃市場(chǎng)行情。就醫(yī)食入：漱口。如有不適感。就醫(yī)消防措施危險(xiǎn)特性：其蒸氣與空氣可形成性混合物，遇明火、高熱及強(qiáng)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(xiǎn)性的過氧化物。與酸類接觸能發(fā)生反應(yīng)。與氫氧化鉀、氫氧化鈉反應(yīng)劇烈，泰州2-甲基四氫呋喃市場(chǎng)行情，泰州2-甲基四氫呋喃市場(chǎng)行情。蒸氣比空氣重，沿地面擴(kuò)散并易積存于低洼處，遇火源會(huì)著火回燃。四氫呋喃與水能混溶。泰州2-甲基四氫呋喃市場(chǎng)行情</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="泰州2-甲基四氫呋喃市場(chǎng)行情,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624080435939/3968180.png"></div><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)甲酚來防止氧化。四氫呋喃可以通過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)。杭州2-甲基四氫呋喃批發(fā)廠家甲基作為一個(gè)化學(xué)基團(tuán)，它能夠結(jié)合在DNA上某些特定部位。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="泰州2-甲基四氫呋喃市場(chǎng)行情,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624283199578/5832986.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(jiǎn)便，條件溫和，收率高，催化劑用量少，可連續(xù)使用。</p><p style="text-indent:25px">PTMEA至PTMEG轉(zhuǎn)化的結(jié)果是聚合物料中留下了催化劑甲醇鈉(NaOMe)。要去除催化劑，首先用20%硫酸鎂水溶液與PTMEG中的甲醇鈉中和，反應(yīng)生成氫氧化鎂和硫酸鈉鹽，然后PTMEG 產(chǎn)品物料通過兩級(jí)干燥過程將其中所有的氫氧化鎂和硫酸鈉鹽結(jié)晶析出。干燥脫水后的PTMEG 連同結(jié)晶顆粒一起被通過“板框式”壓濾機(jī)過濾系統(tǒng)，以去除其中的固體結(jié)晶顆粒。窄化處理工藝過程部分提供了對(duì)PTMEG 的之后凈化，并通過去除產(chǎn)品中的低分子量聚合物，對(duì)聚合物產(chǎn)品的分子量（MW）分布進(jìn)行之后的窄化調(diào)整。這是通過兩級(jí)工藝過程實(shí)現(xiàn)的。經(jīng)初級(jí)工藝過程的“真空脫氣”后除去水、氮?dú)獾炔荒龤?，聚合物產(chǎn)品被輸送到短程蒸餾來完成之后一級(jí)工藝過程，在此過程中，低分子聚合被脫除。脫氣和短程蒸餾都備有冷阱用來凝聚低分子量聚合物。2-甲基四氫呋喃是一種有機(jī)化合物，分子式是C5H10O。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="泰州2-甲基四氫呋喃市場(chǎng)行情,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389623991305064/1986424.png"></div><p style="text-indent:25px">儲(chǔ)存于陰涼、通風(fēng)的庫房。遠(yuǎn)離火種、熱源。庫溫不宜超過30℃。包裝要求密封，不可與空氣接觸。應(yīng)與氧化劑等分開存放，切忌混儲(chǔ)。采用防爆型照明、通風(fēng)設(shè)施。禁止使用易產(chǎn)生火花的機(jī)械設(shè)備和工具。儲(chǔ)區(qū)應(yīng)備有泄漏應(yīng)急處理設(shè)備和合適的收容材料。采用鐵桶包裝。貯存在陰涼、通風(fēng)、干燥的倉庫內(nèi)，嚴(yán)禁煙火。搬運(yùn)時(shí)小心輕放，切勿倒置，避免碰撞。按易燃有毒物品規(guī)定貯運(yùn)。鐵桶包裝，凈重１７０ｋｇ／桶。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(shí)，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。聚四亞甲基醚二醇，又稱聚四氫呋喃。南通2-甲基四氫呋喃廠</p><p style="text-indent:25px">四氫呋喃是一個(gè)雜環(huán)有機(jī)化合物。泰州2-甲基四氫呋喃市場(chǎng)行情</p><p style="text-indent:25px">二甲基甲酰胺(DMF)作為重要的化工原料以及性能優(yōu)良的溶劑,主要應(yīng)用于聚氨酯、腈綸、醫(yī)藥、農(nóng)藥、染料、電子等行業(yè).在聚氨酯行業(yè)中作為洗滌固化劑,主要用于濕法合成革生產(chǎn)；在醫(yī)藥行業(yè)中作為合成藥物中間體,普遍用于制取強(qiáng)力霉素、可的松、磺胺類藥品的生產(chǎn)；在腈綸行業(yè)中作為溶劑,主要用于腈綸的干法紡絲生產(chǎn)；在農(nóng)藥行業(yè)中用于合成高效低毒農(nóng)藥殺蟲劑；在染料行業(yè)作為染料溶劑；在電子行業(yè)作為鍍錫零部件的淬火及電路板的清洗等；其它行業(yè)包括危險(xiǎn)氣體的載體、藥品結(jié)晶用溶劑、粘合劑等。能與水、醇、醚、酯、酮、不飽和烴、芳香烴等混溶。泰州2-甲基四氫呋喃市場(chǎng)行情</p><p style="text-indent:25px">上海蔚云化工有限公司是一家貿(mào)易型類企業(yè)，積極探索行業(yè)發(fā)展，努力實(shí)現(xiàn)產(chǎn)品創(chuàng)新。公司是一家私營(yíng)有限責(zé)任公司企業(yè)，以誠(chéng)信務(wù)實(shí)的創(chuàng)業(yè)精神、專業(yè)的管理團(tuán)隊(duì)、踏實(shí)的職工隊(duì)伍，努力為廣大用戶提供***的產(chǎn)品。公司擁有專業(yè)的技術(shù)團(tuán)隊(duì)，具有環(huán)戊酮，甲基異丙基酮，丙二胺，二甘醇胺等多項(xiàng)業(yè)務(wù)。上海蔚云化工自成立以來，一直堅(jiān)持走正規(guī)化、專業(yè)化路線，得到了廣大客戶及社會(huì)各界的普遍認(rèn)可與大力支持。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/1841417.html</p></div></div></div></div></div><div id="o2oamjl" class="page-right twoColRt"><div id="z8o72pq" class="box01 margin10 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