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style="text-indent:25px">乙二醇，較重要的二元醇是乙二醇，或稱1,2-乙二醇，俗名甘醇。乙二醇的工業(yè)生產(chǎn)方法是由環(huán)氧乙烷加壓水合或酸催化下水合制得。加壓水合要求用加壓設(shè)備及高溫，但后處理方便，因此用得很普遍；而酸催化水合雖然不需要壓力設(shè)備，反應(yīng)溫度也較低，但從產(chǎn)品中除去硫酸是相當(dāng)麻煩的。用上述二法制取乙二醇，總產(chǎn)率均超過90%（按環(huán)氧乙烷計(jì)），同時(shí)都有副產(chǎn)品一縮二乙二醇和二縮三乙二醇，前者可作為溶劑，液壓制動(dòng)設(shè)備的工作液體，織物的修飾和染色，后者可作為溶劑及增塑劑。芐醇在化妝品組分中為限用防腐劑，較大用量為1%。高純度甲基丁烯醇供應(yīng)</p><p style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="高純度甲基丁烯醇供應(yīng),醇" src="https://img01.71360.com/w3/86g00z/20231102/574085e8df342531f2dbebc2feca2d1d.png?wmk=874815686805950464"></p><p style="text-indent:25px">由煤制合成氣經(jīng)草酸酯加氫制取乙二醇的三個(gè)主要反應(yīng)為：氧化、酯化反應(yīng)： CO偶聯(lián)反應(yīng)：草酸酯加氫反應(yīng)：總的化學(xué)方程式：煤制乙二醇在3月18日通過中國(guó)科學(xué)院組織的成果鑒定，此項(xiàng)成果標(biāo)志著我國(guó)在世界上率先實(shí)現(xiàn)了全套“煤制乙二醇”技術(shù)路線和工業(yè)化應(yīng)用，是一項(xiàng)擁有自主知識(shí)產(chǎn)權(quán)的世界技術(shù)。該技術(shù)的推廣應(yīng)用將有效緩解我國(guó)乙二醇產(chǎn)品供需矛盾，對(duì)國(guó)家的能源和化工產(chǎn)業(yè)產(chǎn)生重要積極影響，具有重要的科學(xué)意義、突出的技術(shù)創(chuàng)新性和明顯的社會(huì)經(jīng)濟(jì)效益。煤制乙二醇的工業(yè)化生產(chǎn)已經(jīng)有了很大的突破，至2011年12月7日通遼金煤化工20萬(wàn)噸乙二醇項(xiàng)目已成功投產(chǎn)。高純度甲醇廠商芐醇是極有用的定香劑，是茉莉、月下香、伊蘭等香精調(diào)配時(shí)不可缺少的香料。</p><p style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="高純度甲基丁烯醇供應(yīng),醇" src="https://img01.71360.com/w3/86g00z/20231222/41ca33692616714f671da9faedd52d20.png?wmk=874815686805950464"></p><p style="text-indent:25px">乙二醇含有羥基，長(zhǎng)期在80攝氏度-90 ℃下工作，乙二醇會(huì)先被氧化成乙醇酸，再被氧化成草酸，,即乙二酸（草酸），含有2個(gè)羧基。草酸及其副產(chǎn)物會(huì)先影響神經(jīng)系統(tǒng)，接著是心臟，而后影響腎臟。乙二醇乙二酸，對(duì)設(shè)備造成腐蝕而使之滲漏。因此，在配制的防凍液中，還必須有防腐劑，以防止對(duì)鋼鐵、鋁的腐蝕和水垢的生成。乙二醇甲醚系列產(chǎn)品是性能優(yōu)良的高級(jí)有機(jī)溶劑，作為印刷油墨、工業(yè)用清洗劑、涂料（硝基纖維漆、清漆、瓷漆）、覆銅板、印染等的溶劑和稀釋劑。但它容易代謝氧化生成有毒的草酸，因而不能普遍用作溶劑。</p><p style="text-indent:25px">需要注意的是，乙醇具有易燃、易揮發(fā)、有毒等特性，儲(chǔ)存時(shí)需要注意安全。在儲(chǔ)存、運(yùn)輸和使用乙醇時(shí)，應(yīng)遵循相關(guān)的安全規(guī)定和標(biāo)準(zhǔn)。二甘醇（Diethylene glycol），一種多元醇類，化學(xué)式C4H10O3，無(wú)色、無(wú)臭、透明、吸濕性的粘稠液體，有著辛辣的甜味，無(wú)腐蝕性，低毒。中文名：二甘醇中文別名：二乙二醇； 2,2’-氧代二乙醇；二乙二醇醚；一縮二乙二醇； 2-羥基乙基醚(或稱縮二乙二醇,或稱二甘醇)；2,2'-氧代二乙醇； 2,2'-氧聯(lián)二乙醇；雙甘醇；性質(zhì)與穩(wěn)定性。甲基丙二醇溶解性：與水、乙醇、丁醇、苯乙烯、四氫呋喃、碳酸丙烯酯等溶劑互溶。</p><p style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="高純度甲基丁烯醇供應(yīng),醇" src="https://img01.71360.com/w3/86g00z/20231222/1f5cfdb0cbccb0c9d90e174e43c17f16.png?wmk=874815686805950464"></p><p style="text-indent:25px">醇類化合物受羥基的影響，存在分子間的氫鍵，在水中還有醇分子和水分子間的氫鍵。所以，它們的物理性質(zhì)與相應(yīng)的烴差異較大。主要表現(xiàn)在熔沸點(diǎn)比較高，在水中有一定的溶解度等。一般而言，低級(jí)的醇類水溶性較好，甲醇、乙醇和丙醇能與水以任意比例混溶。4~11個(gè)碳原子的醇為油狀液體，部分溶于水，以后隨著碳原子數(shù)增加，烴基對(duì)分子的影響越來(lái)越大，使高級(jí)醇的物理性質(zhì)更接近于相應(yīng)的烴。另外，低級(jí)的醇具有特殊的氣味和辛辣的味道，而高級(jí)的醇則無(wú)嗅、無(wú)味。芐醇的操作注意事項(xiàng)：密閉操作，全方面通風(fēng)。進(jìn)口三甘醇供應(yīng)</p><p style="text-indent:25px">三元醇是1,2,3-丙三醇，是在嚴(yán)格冷卻條件下，將甘油滴入濃硝酸與濃硫酸的混合酸中反應(yīng)形成的。高純度甲基丁烯醇供應(yīng)</p><p style="text-indent:25px">生物醫(yī)學(xué)領(lǐng)域應(yīng)用，醫(yī)用聚乙二醇又稱聚環(huán)氧乙烷 (PEO)。由環(huán)氧乙烷開環(huán)聚合得到的線性聚醚。在生物醫(yī)學(xué)領(lǐng)域主要用途如下：1、隱形眼鏡用液。利用聚乙二醇水溶液的粘度對(duì)剪切速率較敏感和細(xì)菌不易在聚乙二醇上生長(zhǎng)。2、合成潤(rùn)滑藥。環(huán)氧乙烷與水的縮合聚合物。為配制水溶性藥物的軟膏基質(zhì)，也可作為乙酰水楊酸、尼莫地平等難溶于水藥物的溶媒，供注射液的配制。3、藥物緩釋和固定化酶的載體。將聚乙二醇水溶液涂敷于藥丸外層，可控制丸內(nèi)藥物在體內(nèi)擴(kuò)散，以提高藥效。高純度甲基丁烯醇供應(yīng)</p></div> </div> <div id="8gzv3zcq3zww" class="sxp"> <ul> <li>上一篇：<a href="http://plasticsurgerycash.com/Article/94a599900.html" 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