南京2-甲基四氫呋喃生產(chǎn)商上海蔚云化工供應(yīng)-b2b網(wǎng)站_b2b電子商務(wù)平臺【買產(chǎn)品】-上?？谄蚴称酚邢薰?/title><meta name="description" content="使用注意事項(xiàng)：呼吸系統(tǒng)防護(hù)：可能接觸其蒸氣時，應(yīng)該佩戴過濾式防毒面具(半面罩)。必要時，建議佩戴自給式呼吸器眼睛防護(hù)：一般不需要特殊防護(hù)，高濃度接觸時可戴安全防護(hù)眼鏡。身體防護(hù)：穿防靜電工作服。手防護(hù)：戴防苯耐油手套，南京2-甲基四氫呋喃生"><meta name="keywords" content="南京2-甲基四氫呋喃生產(chǎn)商,2-甲基四氫呋喃"><link rel="canonical" href="http://www.cdcfah.com/"/><meta name="applicable-device" content="pc"><link rel="shortcut icon" href="/static/new_net_01/images/favicon.ico"><link rel="stylesheet" href="/static/new_net_01/css/slick.css" /><link rel="stylesheet" href="/static/new_net_01/css/addnew.css"><link rel="stylesheet" href="/static/new_net_01/css/sidenav.css"><link rel="stylesheet" href="/static/new_net_01/css/style.css" /><link rel="stylesheet" href="/static/new_net_01/css/tab.css"><link rel="stylesheet" href="/static/new_net_01/css/404.css"> <meta name="baidu-site-verification" content="OBVzrC9aaQ" /> <meta http-equiv="Cache-Control" 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07:16:04</p><p><span id="click" >瀏覽次數(shù)：1次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="purjlnu" 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="bviaxzb" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="gln2ebn" class="box"><p><p style="text-indent:25px">使用注意事項(xiàng)：呼吸系統(tǒng)防護(hù)：可能接觸其蒸氣時，應(yīng)該佩戴過濾式防毒面具(半面罩)。必要時，建議佩戴自給式呼吸器眼睛防護(hù)：一般不需要特殊防護(hù)，高濃度接觸時可戴安全防護(hù)眼鏡。身體防護(hù)：穿防靜電工作服。手防護(hù)：戴防苯耐油手套，南京2-甲基四氫呋喃生產(chǎn)商。其它：工作現(xiàn)場嚴(yán)禁吸煙。工作畢，淋浴更衣。注意個人清潔衛(wèi)生。應(yīng)急處置：皮膚接觸：脫去被污染的衣著，用肥皂水和清水徹底沖洗皮膚，南京2-甲基四氫呋喃生產(chǎn)商。眼睛接觸：提起眼瞼，南京2-甲基四氫呋喃生產(chǎn)商，用流動清水或生理鹽水沖洗。就醫(yī)。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，給輸氧。如呼吸停止，立即進(jìn)行人工呼吸。就醫(yī)。食入：飲足量溫水，催吐，就醫(yī)。滅火方法：噴水冷卻容器，可能的話將容器從火場移至空曠處。處在火場中的容器若已變色或從安全泄壓裝置中產(chǎn)生聲音，必須馬上撤離。滅火劑：泡沫、干粉、二氧化碳、砂土。用水滅火無效。小量泄漏：用砂土或其它不燃材料吸附或吸收。也可以用大量水沖洗，洗水稀釋后放入廢水系統(tǒng)。大量泄漏：構(gòu)筑圍堤或挖坑收容。用泡沫覆蓋，降低蒸氣災(zāi)害。噴霧狀水冷卻和稀釋蒸汽、保護(hù)現(xiàn)場人員、把泄漏物稀釋成不燃物。用防爆泵轉(zhuǎn)移至槽車或**收集器內(nèi)，回收或運(yùn)至廢物處理場所處置。甲基作為一個化學(xué)基團(tuán)，它能夠結(jié)合在DNA上某些特定部位。南京2-甲基四氫呋喃生產(chǎn)商</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="南京2-甲基四氫呋喃生產(chǎn)商,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389623884264046/3770351.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(shù)，多級孔硅鋁復(fù)合氧化物聚合催化劑，實(shí)現(xiàn)了PTMEG產(chǎn)品的分子量大小及分子量分布的調(diào)控。與國外粘土催化劑相比，四氫呋喃轉(zhuǎn)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(fù)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(xiàng)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(shù)，編制了200 t/a催化劑制備與催化反應(yīng)工藝完整的工藝包，建成了催化劑制備與反應(yīng)工藝示范工程，具備了50 t/a催化劑生產(chǎn)能力。南京2-甲基四氫呋喃生產(chǎn)商四氫呋喃常含有少量水分及過氧化物。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="南京2-甲基四氫呋喃生產(chǎn)商,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624016490617/6540095.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">四氫呋喃主要用途是作高分子聚合物的前體四氫呋喃是一個雜環(huán)有機(jī)化合物，分子式為C4H8O。屬于醚類，是芳香族化合物呋喃的完全氫化產(chǎn)物，是一種無色、可與水混溶、在常溫常壓下有較小粘稠度的有機(jī)液體。這種環(huán)狀醚的化學(xué)式可寫作(CH2)4O。由于它的液態(tài)范圍很長，所以是一種常用的中等極性非質(zhì)子性溶劑。它的主要用途是作高分子聚合物的前體。盡管THF的氣味和化學(xué)性質(zhì)與**很相似，但是麻醉效果卻很差。用作溶劑、有機(jī)合成的原料。用作色譜分析試劑、有機(jī)溶劑及尼龍66中間體。四氫呋喃又名一氧五環(huán)、氧雜環(huán)戊烷、四亞甲基氧，是合成農(nóng)藥苯丁錫的中間體，另外，可直接用于制合成纖維、合成樹脂、合成橡膠，也是許多聚合材料、精密磁帶和電鍍工業(yè)的溶劑，還用于制己二腈、己二酸、己二胺、丁二酸、丁二醇、γ-丁內(nèi)酯等，在醫(yī)藥工業(yè)上，可用于生產(chǎn)咳必清、黃體酮、利復(fù)霉素和用作制藥溶劑等。四氫呋喃是一個雜環(huán)有機(jī)化合物。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="南京2-甲基四氫呋喃生產(chǎn)商,2-甲基四氫呋喃" src="https://tyunfile.71360.com/UploadFile/shweiyun/637389624080435939/3968180.png"></div><p style="text-indent:25px">甲基由一個化合物轉(zhuǎn)移到另一化合物上的酶反應(yīng)：A+B-CH3→A-CH3+B。由于N5、N10-亞甲四氫葉酸的酶促還原作用生成N5-甲基四氫葉酸，由一種鈷胺酰胺酶的作用將甲基由N5-甲基四氫葉酸轉(zhuǎn)移到同型半胱氨酸上而生成甲硫氨酸。甲硫氨酸由于ATP的作用變成S-腺苷酰甲硫氨酸，此化合物被用做甲基供體生成各種甲基化合物。作為膽堿氧化形式的甜菜堿等也起甲基供體作用。甲基轉(zhuǎn)移反應(yīng)不僅與含有甲基的膽堿、肌酸、腎上腺素等物質(zhì)的生成有關(guān)系，而且也與***、磷脂的變化、核酸及蛋白質(zhì)的甲基化也有關(guān)系，在生理上也是重要的。已知有數(shù)十種對各種化合物具特異的轉(zhuǎn)甲基酶。金屬汞和二價離子汞等無機(jī)汞在生物特別是微生物的作用下會轉(zhuǎn)化成甲基汞和二甲基汞，這種轉(zhuǎn)化稱為生物甲基化作用。這種轉(zhuǎn)化的逆過程稱為生物反甲基化作用。這兩種作用構(gòu)成了微生物的汞循環(huán)聚四亞甲基醚二醇，又稱聚四氫呋喃。南京2-甲基四氫呋喃生產(chǎn)商</p><p style="text-indent:25px">甲基化的酶促反應(yīng)是由微生物直接參與進(jìn)行的。南京2-甲基四氫呋喃生產(chǎn)商</p><p style="text-indent:25px">THF自身可縮聚（經(jīng)陽離子引發(fā)開環(huán)再聚合）成聚四亞甲基醚二醇（PTMEG），也稱四氫呋喃均聚醚。PTMEG與甲苯二異氰酸酯（TDI）制成耐磨、耐油、低溫性能好、強(qiáng)度高的特種橡膠；與對苯二甲酸二甲酯和1,4-丁二醇制成嵌段聚醚聚酯彈性Chemicalbook材料。相對分子質(zhì)量為2000的PTMEG與對亞甲基雙（4-苯基）二異氰酸酯（MDI）制成聚氨酯彈性纖維（氨綸，即SPANDEX纖維）、特種橡膠和一些特殊用途涂料的原料。在有機(jī)合成方面，用于生產(chǎn)四氫噻吩、1.4-二氯乙烷、2.3-二氯四氫呋喃、戊內(nèi)酯、丁內(nèi)酯和吡咯烷酮等。在醫(yī)藥工業(yè)方面，THF用于合成咳必清、利復(fù)霉素、黃體酮和一些藥。THF經(jīng)硫化氫處理生成四氫硫酚，可作燃料氣中的臭味劑（識別添加劑）。THF還可用做合成革的表面處理劑。南京2-甲基四氫呋喃生產(chǎn)商</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/3156528.html</p></div></div></div></div></div><div id="pzw78ro" class="page-right twoColRt"><div id="jpvskwy" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="et2dsp7" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" alt="福建ZF配件哪家強(qiáng) 信息推薦自業(yè)物資供應(yīng)" class="vcenter" 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