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onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="08oweua" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624039166387/6007011.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="yu08sqm" 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-甲基四氫呋喃工廠,2-甲基四氫呋喃</p><p><span>***更新：</span>2020-11-08 03:20:41</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="wuqmk0k" 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="kqos0mg" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="y8ucsa0" class="box"><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，衢州2-甲基四氫呋喃工廠。經(jīng)初級(jí)工藝過程的“真空脫氣”后除去水、氮?dú)獾炔荒龤猓酆衔锂a(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，衢州2-甲基四氫呋喃工廠，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，衢州2-甲基四氫呋喃工廠。四氫呋喃可用作溶劑、有機(jī)合成的原料。衢州2-甲基四氫呋喃工廠</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="衢州2-甲基四氫呋喃工廠,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624039166387/6007011.png"></div><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(yīng)工序，在這一關(guān)鍵步驟中，THF、**(ACAN)、和醋酸(HAC) 被連續(xù)加入聚合反應(yīng)器中反應(yīng)生成PTMEA，聚合轉(zhuǎn)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(duì)PTMEA 分離提純。反應(yīng)器產(chǎn)品物料中有未反應(yīng)的THF、ACAN、及HAC返回至反應(yīng)器循環(huán)再使用。催化劑截留其中，同時(shí)將產(chǎn)品及其反應(yīng)熱移出。甲醇化處理之目的是將PTMEA 轉(zhuǎn)化為PTMEG，這一轉(zhuǎn)化是經(jīng)與甲醇反應(yīng)通過酯-醇交換實(shí)現(xiàn)的。PTMEA、甲醇、和甲醇鈉被加入反應(yīng)精餾塔中，產(chǎn)物PTMEG及一些殘余甲醇和甲醇鈉在反應(yīng)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(yīng)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。南京2-甲基四氫呋喃批發(fā)報(bào)價(jià)甲基和DNA結(jié)合過程叫甲基化。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="衢州2-甲基四氫呋喃工廠,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389623991305064/1986424.png"></div><p style="text-indent:25px">四氫呋喃的沸點(diǎn)比較低，將其調(diào)入汽油后使汽油的餾程溫度降低。這一性質(zhì)讓生產(chǎn)超高辛烷值汽油的煉油廠獲得了很大的經(jīng)濟(jì)效益。采用四氫呋喃作為反應(yīng)溶劑，使反應(yīng)產(chǎn)物和催化劑容易分離，使3-HPA的濃度提高到35%以上。采用水萃取3-HPA，使鈷催化劑的循環(huán)使用率達(dá)99.6%，通過控制羰基化反應(yīng)中的水含量和3-HPA的濃度，使高沸點(diǎn)副產(chǎn)物很少，生成3-HPA選擇性大于90%，使該技術(shù)的工業(yè)化成為可能。產(chǎn)品運(yùn)輸：運(yùn)輸車輛應(yīng)配備相應(yīng)消防器材及泄漏應(yīng)急處理設(shè)備。嚴(yán)禁與氧化劑、食用化學(xué)品等混裝混運(yùn)。禁止使用易產(chǎn)生火花的機(jī)械設(shè)備和工具裝卸。夏季較好早晚運(yùn)輸。運(yùn)輸途中應(yīng)防暴曬、雨淋，防高溫。中途停留時(shí)應(yīng)遠(yuǎn)離火種、熱源、高溫區(qū)。鐵路運(yùn)輸時(shí)要禁止溜放。嚴(yán)禁用木船、水泥船散裝運(yùn)輸。運(yùn)輸工具上應(yīng)根據(jù)相關(guān)運(yùn)輸要求張貼危險(xiǎn)標(biāo)志、公告。</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)。四氫呋喃并用于天然氣加味。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="衢州2-甲基四氫呋喃工廠,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389623961490638/1355180.png"></div><p style="text-indent:25px">工業(yè)生產(chǎn)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(yīng)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(chǎn)1噸四氫呋喃，約需消耗3噸多糖醛。后來發(fā)展的生產(chǎn)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?yàn)槎《际怯梢胰埠图兹┲频玫?，此法稱雷由法（Reppe法）；利用氯丁橡膠單體氯丁二烯的副產(chǎn)物1,4-二氯丁烯生產(chǎn)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(chǎn)四氫呋喃的方法之一?？啡┲饕捎衩仔镜绒r(nóng)副產(chǎn)品水解制造。該法污染嚴(yán)重，不利于大規(guī)模生產(chǎn)，已逐步被淘汰。甲基四氫呋喃是作為綠色溶劑替代四氫呋喃的。揚(yáng)州2-甲基四氫呋喃質(zhì)量哪家好</p><p style="text-indent:25px">四氫呋喃具有低毒、低沸點(diǎn)、流動(dòng)性好等特點(diǎn)。衢州2-甲基四氫呋喃工廠</p><p style="text-indent:25px">甲基化作用可在需氧或厭氧條件下進(jìn)行，其轉(zhuǎn)化機(jī)理主要有酶促反應(yīng)和非酶促反應(yīng)兩種。非酶促反應(yīng)機(jī)理依據(jù)厭氧菌甲烷形成菌合成的甲基鈷氨素作為甲基供體,在有三磷酸腺苷(ATP)和中等還原劑的條件下把無機(jī)汞轉(zhuǎn)化成甲基汞或二甲基汞，與此同時(shí)甲基鈷氨素轉(zhuǎn)化成羥基鈷氨素。甲基化的酶促反應(yīng)是由微生物直接參與進(jìn)行的。細(xì)菌利用培養(yǎng)基中豐富的維生素，在細(xì)胞內(nèi)產(chǎn)生轉(zhuǎn)甲基酶，促使甲基轉(zhuǎn)移，但酶的種類還不清楚。從底泥、土壤和魚的內(nèi)臟、魚鰓中發(fā)現(xiàn)，能使汞甲基化的微生物種類很多，厭氧菌中有匙形梭狀芽孢桿菌,需氧菌中有熒光極毛桿菌草分枝桿菌大腸桿菌等甲基化速度取決于酶的活性，并與營(yíng)養(yǎng)環(huán)境以及半胱氨酸和維生素B等因素有關(guān)。厭氧條件下硫化物的存在往往會(huì)控制汞甲基化的進(jìn)行。衢州2-甲基四氫呋喃工廠</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(xiǎn)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(jī)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(xiàng)目，經(jīng)相關(guān)部門批準(zhǔn)后方可開展經(jīng)營(yíng)活動(dòng)】的公司，是一家集研發(fā)、設(shè)計(jì)、生產(chǎn)和銷售為一體的專業(yè)化公司。上海蔚云化工擁有一支經(jīng)驗(yàn)豐富、技術(shù)創(chuàng)新的專業(yè)研發(fā)團(tuán)隊(duì)，以高度的專注和執(zhí)著為客戶提供環(huán)戊酮，甲基異丙基酮，丙二胺，二甘醇胺。上海蔚云化工致力于把技術(shù)上的創(chuàng)新展現(xiàn)成對(duì)用戶產(chǎn)品上的貼心，為用戶帶來良好體驗(yàn)。上海蔚云化工始終關(guān)注化工市場(chǎng)，以敏銳的市場(chǎng)洞察力，實(shí)現(xiàn)與客戶的成長(zhǎng)共贏。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/1895466.html</p></div></div></div></div></div><div id="00ecqok" class="page-right twoColRt"><div id="oweu0us" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="muk8uqw" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img 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