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class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="exp3asu" 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>安徽2-甲基四氫呋喃哪個(gè)品牌好,2-甲基四氫呋喃</p><p><span>***更新：</span>2021-01-10 04:16:55</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="xl3b8t9" 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="magxz2b" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="ei33olc" class="box"><p><p style="text-indent:25px">低濃度四氫呋喃廢氣的處理，提出了一種經(jīng)濟(jì)有效的電化學(xué)氧化強(qiáng)化溶液吸收去除THF的方法。實(shí)驗(yàn)采用圓筒式溶液吸收電化學(xué)反應(yīng)器降解THF，圓筒中心沿軸向設(shè)置有RuO2涂層的鈦棒陽極，筒內(nèi)壁附有一層不銹鋼網(wǎng)作為陰極，兩極的距離約為9 mm。實(shí)驗(yàn)結(jié)果表明，THF的去除率與電解吸收液的性質(zhì)有關(guān)，在NaCl溶液中的去除率高于Na2SO4溶液，這是因?yàn)槲雎入姌O電解NaCl溶液時(shí)能產(chǎn)生有效氯間接氧化THF。實(shí)驗(yàn)發(fā)現(xiàn)THF的去除率也與吸收液的pH有關(guān)，在酸性NaCl溶液中的去除率明顯高于堿性條件下，安徽2-甲基四氫呋喃哪個(gè)品牌好，當(dāng)pH約為1時(shí)，安徽2-甲基四氫呋喃哪個(gè)品牌好，去除率較高能達(dá)到94.8%。此外，安徽2-甲基四氫呋喃哪個(gè)品牌好，還發(fā)現(xiàn)采用254 nm的紫外光照射能增加THF的去除率。經(jīng)檢測THF的主要液相降解產(chǎn)物為γ-丁內(nèi)酯。甲基四氫呋喃容易冷凝回收，揮發(fā)損失少，大氣污染小。安徽2-甲基四氫呋喃哪個(gè)品牌好</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="安徽2-甲基四氫呋喃哪個(gè)品牌好,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624027184007/8887733.png"></div><p style="text-indent:25px">隨著分子遺傳學(xué)的發(fā)展，生物甲基化和微生物抗汞的生態(tài)學(xué)研究已推向分子水平，近年來開展了微生物轉(zhuǎn)化汞的遺傳控制研究。細(xì)菌的抗汞性能受遺傳質(zhì)粒和染色體的調(diào)節(jié)和控制，某些具有抗汞性的細(xì)菌質(zhì)粒有移位的潛力，使不具有抗性的細(xì)菌細(xì)胞獲得抗性。這將進(jìn)一步闡明底泥中細(xì)菌能使汞遷移轉(zhuǎn)化和使廢料中汞實(shí)行再循環(huán)的基礎(chǔ)。為了提高微生物的抗汞能力，有的學(xué)者已應(yīng)用質(zhì)體轉(zhuǎn)移新技術(shù)得到新的質(zhì)粒（MER質(zhì)粒）,細(xì)菌具有這種新質(zhì)粒，抗汞能力可提高40倍左右。連云港2-甲基四氫呋喃批發(fā)哪家好甲基化作用可在需氧或厭氧條件下進(jìn)行。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="安徽2-甲基四氫呋喃哪個(gè)品牌好,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389623944439837/8611025.png"></div><p style="text-indent:25px">聚四氫呋喃二醇是由四氫呋喃（ＴＨＦ）在陽離子引發(fā)下開環(huán)聚合而得到的均聚醚，它含有醚鍵，又有相當(dāng)多的規(guī)整排列的亞甲基，以伯羥基為端基，主要用作聚氨酯彈性體的軟段，是聚氨酯的較好原料。非聚氨酯用途包括共聚酯彈性體、聚醚酰胺工程塑料。ＰＴＭＥＧ型聚氨酯彈性體具有較高模量和強(qiáng)度，優(yōu)異的耐水解、耐磨、耐霉菌、耐油性、動(dòng)態(tài)力學(xué)性能、電絕緣性能和低溫柔性等性能，它具有通常的聚酯型聚氨酯彈性體所不能達(dá)到的某些特性，特別是良好的耐水性。PTMEG是一種常用的特種聚醚多元醇，用于注射及擠出熱塑性聚氨酯彈性體（TPU）、澆注型聚氨酯彈性體、聚氨酯纖維紡絲、混煉型聚氨酯彈性體等制造工藝，特別適合用于氨綸、汽車配件、電纜、薄膜、織物涂層、合成革、醫(yī)療器材、高性能膠輥、耐油密封件、膠黏劑、金屬部件耐磨內(nèi)襯、體育運(yùn)動(dòng)制品，以及用于水下、地下、礦井及低溫場合的制品。彈性體多用于耐水解要求高的場合。</p><p style="text-indent:25px">四氫呋喃性狀：無色液體，有與醚類似的氣味。能與水和有機(jī)溶劑相混溶，易燃。四氫呋喃在強(qiáng)氧化劑高錳酸鉀的作用下會發(fā)生反應(yīng)生成丁二酸；檢測殘留四氫呋喃的方法感覺用儀器分析，如氣、液相色譜；四氫呋喃是一種性質(zhì)比較穩(wěn)定的常用的有機(jī)溶劑，也可用于化工產(chǎn)品生產(chǎn)原料。四氫呋喃的沸點(diǎn)是分子量72.11相對dao密度（du20℃/4℃dao）0.8892凝固點(diǎn)/℃-108.5沸點(diǎn)/℃65.4閃點(diǎn)（閉口）/℃17.2折光率（20℃）1.407介電?；?cái)?shù)（25℃）7.58偶極矩/(10^-30C·答m)5.70,5.67表面張力/(mN/m)26.4黏度(20℃)/mPa·s0.55臨界溫度/℃26.8臨界壓力/MPa5.19蒸氣壓(15℃)/kPa15.2 蒸氣相對密度（空氣=1）2.5燃點(diǎn)/℃321.1蒸發(fā)熱(66℃)/(KJ/Kg)410極限/%(體積)2.3-11.8較小引燃能量/mJ0.5。四氫呋喃分子是由4個(gè)C原子、8個(gè)H原子和1個(gè)O原子組成的。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="安徽2-甲基四氫呋喃哪個(gè)品牌好,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624039166387/6007011.png"></div><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(yùn)輸：運(yùn)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(yùn)。甲基，化學(xué)式為-CH?，由碳和氫元素組成。連云港2-甲基四氫呋喃批發(fā)哪家好</p><p style="text-indent:25px">四氫呋喃與水能混溶。安徽2-甲基四氫呋喃哪個(gè)品牌好</p><p style="text-indent:25px">當(dāng)以2-甲基四氫呋喃為溶劑，Ag2CO3為氧化劑，三甲基環(huán)三硼氧烷為甲基化試劑，Cp*Co(PhH)(PF6)2作為催化劑，可獲得較佳反應(yīng)結(jié)果（Table 1）。對底物范圍進(jìn)行了擴(kuò)展。反應(yīng)結(jié)果表明，藥物分子中常見的氮雜環(huán)（3a–3e）或者酰胺基團(tuán)（3f–3p），均與體系兼容。一級酰胺由于缺乏導(dǎo)向基團(tuán)，從而導(dǎo)致具有合成難度，但增加催化劑用量，也可以實(shí)現(xiàn)鄰位的甲基化（3k-3m）。二級苯甲酰胺（3f-3j）不論是否有立**阻或環(huán)狀，都是很好的底物。三級酰胺1n 和1o可以選擇性的單甲基化，含溴的底物3o也沒有出現(xiàn)副反應(yīng)。底物3p和3z的產(chǎn)物出現(xiàn)了區(qū)域選擇性產(chǎn)物。醛和酮與含氮相比堿性更弱，少見作為C-H活化的底物，但在富電子的芳香環(huán)上，這個(gè)方法可以生成3q和3s。稠環(huán)芳香烴，可以選擇性的在1-位甲基化。然而，酯和羧酸不適用該體系。安徽2-甲基四氫呋喃哪個(gè)品牌好</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)營活動(dòng)】的公司，致力于發(fā)展為創(chuàng)新務(wù)實(shí)、誠實(shí)可信的企業(yè)。上海蔚云化工深耕行業(yè)多年，始終以客戶的需求為向?qū)?，為客戶提?**的環(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)注化工行業(yè)。滿足市場需求，提高產(chǎn)品價(jià)值，是我們前行的力量。</p></p><br /><p>文章來源地址: 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