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href="http://www.cdcfah.com/zh/"><span>展會(huì)信息</span></a></li></ul></div></nav><section class="wrap clearfix"><section class="container clearfix tcPro"><section class="home-main container clearfix"><div id="nx4moa8" class="twoCol"><div id="8rsu9eg" class="page-proshow clearfix"><p class="current"> 當(dāng)前位置:<a href="http://www.cdcfah.com/">首頁?<a href="http://www.cdcfah.com/cp/">產(chǎn)品供應(yīng)</a>?<a href="http://www.cdcfah.com/cp/second-_huagong/">化工</a>?<a href="http://www.cdcfah.com/cp/third-huagong_qtfltz/">其他未分類</a>?宿遷乙基VC 醚信息推薦上海北倉化工科技供應(yīng)</p><div id="jtipofe" class="leftbox clearfix"><h1>宿遷乙基VC 醚信息推薦上海北倉化工科技供應(yīng)</h1><div id="zdxjiu3" class="proBig"><div id="rvxzgic" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shbeicanghuagong/637326788614531250/839106.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="3kmoq7q" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shbeicanghuagong/637326788614531250/839106.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="rfoqykh" 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>宿遷乙基VC 醚,維生素C乙基醚</p><p><span>***更新：</span>2020-12-12 04:15:54</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="aewykhy" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">上海北倉化工科技有限公司</a></p><p><span>聯(lián)系人：</span>王金良</p><p><span>郵箱: </span>shbeicang@vip.126.com</p><p><span>電話: </span>18516286991</p><p><span>傳真: </span>021_</p><p><span>網(wǎng)址: </span>http://www.shbeicang.cn</p><p><span>手機(jī): </span>021-60459206</p><p><span>地址: </span>金山大道4168號(hào)</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="rg82nr2" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="b288bdk" class="box"><p><p style="text-indent:25px">從維生素C一步法制備3－O－烷基抗壞血酸醚的分離純化方法。該方法包括如下步驟：維生素C、堿、烷基化試劑在溶劑中進(jìn)行反應(yīng)，合成3－O－烷基抗壞血酸醚；反應(yīng)結(jié)束，回收反應(yīng)溶劑，宿遷乙基VC 醚，殘余物加水稀釋，上強(qiáng)堿性陰離子交換樹脂柱進(jìn)行離子交換，水洗，至流出液pH≤8；再用稀酸洗柱，將含有3－O－烷基抗壞血酸醚的流出液合并在一起，zui后流出液中沒有3－O－烷基抗壞血酸醚時(shí)即可停止洗脫；洗脫結(jié)束后，將洗脫液進(jìn)行減壓濃縮和結(jié)晶，得到純化的3－O－烷基抗壞血酸醚。本發(fā)明采用了離子交換的分離方法，避免使用大量易燃易爆的有機(jī)溶劑，宿遷乙基VC 醚，宿遷乙基VC 醚，安全性高，提純分離效果好，節(jié)約成本。抗壞血酸四異棕櫚酸酯或稱四己基癸醇抗壞血酸酯，其中維生素C乙基醚比較常見。宿遷乙基VC 醚</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="宿遷乙基VC 醚,維生素C乙基醚" src="https://tyunfile.71360.com/UploadFile/shbeicanghuagong/637326788614531250/839106.png"></div><p style="text-indent:25px">維生素C乙基醚色度測量可以買標(biāo)準(zhǔn)品，待測物和標(biāo)準(zhǔn)品配成相同濃度的溶液，然后對(duì)照就行了。標(biāo)準(zhǔn)品的色度分別是10 20 30......100，看待測物色度在哪個(gè)區(qū)間內(nèi)。也可以參照GB 605 化學(xué)試劑：色度測定通用方法來檢測，按一定比例將氯鉑酸鉀、氯化鈷和鹽酸配成鉑-鈷標(biāo)準(zhǔn)溶液，用目視法或分光光度法測定，比較樣品與鉑-鈷標(biāo)準(zhǔn)溶液，可得出樣品的色度。VC乙基醚可用一定的溶劑（如水或三氯甲烷等，VC乙基醚可溶解的溶劑）配成一定濃度的溶液（如25g/L等），再與標(biāo)準(zhǔn)溶液比較。**維生素C乙基醚哪里有賣維生素C乙基醚膚潤珂運(yùn)用了VC乙基醚，達(dá)到美白淡斑的效果。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="宿遷乙基VC 醚,維生素C乙基醚" src="https://tyunfile.71360.com/UploadFile/shbeicanghuagong/637326788942744140/5036916.png"></div><p style="text-indent:25px">Vc乙基醚的制備:水解:將200-300L的甲醇、不多于4kg的濃鹽酸、不多于35kg的碳酸氫鈉以及折干成160-240kg的Vc- B濕品放入水解槽中進(jìn)行水解 ; 過濾:將水解后的物料在加入15-25L 甲醇的條件下經(jīng)過過濾器過濾; 濃縮、溶解:經(jīng)過過濾器后的物料送入濃縮罐,在加入200-300L 甲醇的條件下濃縮并溶解,分離出甲醇水,去往回收甲醇,其余物料在加入80- -120L 的甲苯和150-210L的正丁醇后蒸餾并溶解,導(dǎo)出甲苯去回收 ;過濾:將蒸餾并溶解后的物料在加入15- -25L正J醇的條件下,經(jīng)過過濾器過濾;結(jié)晶、離心和干燥:經(jīng)過過濾器后的物料先送入結(jié)晶罐進(jìn)行結(jié)晶,然后在混合有100-200L 的乙酸丙乙酯后送入離心機(jī)離心得到正J醇母液套用溶解Z酯母液回收以及Vc乙基醚濕品后,之后將Vc乙基醚濕品送入干燥器進(jìn)行干燥,在去除乙酯后得到Vc乙基醚干品。</p><p style="text-indent:25px">維生素C乙基醚是一種維生素C衍生物，通過人工合成得到，既克服了維生素C不穩(wěn)定的缺點(diǎn)，又極好地發(fā)揮了維生素C的生理功能。維生素C乙基醚具有親油和親水結(jié)構(gòu)，易于皮膚吸收，可直達(dá)真皮層。維生素C乙基醚進(jìn)入真皮層后直接參與膠原蛋白的合成，修復(fù)皮膚細(xì)胞活性，使膠原蛋白增加，從而使皮膚變得充盈富有彈性，使肌膚細(xì)膩光滑。阻抑酪氨酸酶活性，阻抑***，還原黑色素為無色，高效美白肌膚。有優(yōu)越的抗氧化效果，確保維生素C的利用度，相對(duì)維生素C而言，維C乙基醚非常穩(wěn)定，且不變色，真正達(dá)到美白淡斑的效果維生素C乙基醚的還原性可以刺激合成膠原蛋白過程中需要的酶。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="宿遷乙基VC 醚,維生素C乙基醚" src="https://tyunfile.71360.com/UploadFile/shbeicanghuagong/637326788773027343/6779282.png"></div><p style="text-indent:25px">維生素C乙基醚進(jìn)入皮膚后會(huì)轉(zhuǎn)化為VC，對(duì)皮膚有比較好的效果。1.促進(jìn)膠原蛋白的合成。在膠原蛋白合成的過程中，維生素C乙基醚的還原性可以刺激合成膠原蛋白過程中需要的酶。2.可以阻斷黑色素生成。維生素C乙基醚具有還原性，可以阻斷酪氨酸酶的產(chǎn)生，可以在多巴形成黑色素過程中影響黑色素生成，可以在黑色素凝聚使皮膚著色過程產(chǎn)生影響。就是說，即使第一階段有漏網(wǎng)之魚，維生素C乙基醚還會(huì)在后面階段守株待兔。3.還原已生成的黑色素。原理同樣是利用其還原性。4.中和自由基自由基會(huì)影響蛋白質(zhì)活性，會(huì)破壞細(xì)胞膜，使皮膚老化惡化，嚴(yán)重時(shí)候也會(huì)影響皮膚細(xì)胞內(nèi)的DNA。而維生素C乙基醚中和自由基的能力十分強(qiáng)悍。維生素C乙基醚溶液色度可以通過色差計(jì)直接測出溶液的色度。宿遷乙基VC 醚</p><p style="text-indent:25px">維生素C乙基醚具有親油和親水結(jié)構(gòu)，易于皮膚吸收，可直達(dá)真皮層。宿遷乙基VC 醚</p><p style="text-indent:25px">通過國內(nèi)外制備情況了解:維生素C乙基醚的工藝以趨于成熟，今后的研究重點(diǎn)應(yīng)從更節(jié)能環(huán)保的方向考慮。維生素c乙基醚的應(yīng)用前景：有報(bào)道稱維生素C乙基醚是迄今為止比較好的維生素C衍生物，在國內(nèi)外被廣泛應(yīng)用到化妝品中，起到美白效果，預(yù)防黑斑、雀斑出現(xiàn)。保養(yǎng)品中的功效成分是否能被皮膚吸收，得到預(yù)期效果，是大家熱衷的重點(diǎn)，而維生素C乙基醚的特性完全能夠使其皮膚滲透吸收性優(yōu)維生素C和其他維生素C衍生物。結(jié)論是維生素c乙基醚現(xiàn)已成為化妝品行業(yè)以及醫(yī)藥行業(yè)中的重要成分，是一種有價(jià)值的精細(xì)化學(xué)品，具有廣闊的開發(fā)前景。宿遷乙基VC 醚</p></p><br /><p>文章來源地址: 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