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"index_show"><a 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="z9cjlsj" class="twoCol"><div id="amj2jqi" class="page-proshow clearfix"><p class="current"> 當(dāng)前位置:<a href="http://www.cdcfah.com/">首頁(yè)?<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(lèi)</a>?天津進(jìn)口維生素C乙基醚抱誠(chéng)守真上海北倉(cāng)化工科技供應(yīng)</p><div id="yc24f3e" class="leftbox clearfix"><h1>天津進(jìn)口維生素C乙基醚抱誠(chéng)守真上海北倉(cāng)化工科技供應(yīng)</h1><div id="3yk4ipg" class="proBig"><div id="yczyubi" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shbeicanghuagong/637326788773027343/6779282.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="wszofw3" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shbeicanghuagong/637326788773027343/6779282.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="te79ce7" 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>天津進(jìn)口維生素C乙基醚,維生素C乙基醚</p><p><span>***更新：</span>2021-01-26 02:12:30</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="hqxzgi8" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">上海北倉(cāng)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(huà): </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(xiàn)] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="w8tqnzl" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="gpmjqxo" class="box"><p><p style="text-indent:25px">維生素C乙基醚的主要作用：主要用于化學(xué)美白產(chǎn)品的制備,屬于化妝品添加劑技術(shù)領(lǐng)域。背景技術(shù):作為一種化妝品添加劑, Vc乙基醚的制備主要采用Vc為起始原料,經(jīng)**叉保護(hù),醚化和水解脫保護(hù),得到Vc乙基醚,經(jīng)精制結(jié)晶得到成品;但現(xiàn)有的生產(chǎn)方法整體工藝復(fù)雜,成本高,產(chǎn)品的收率低,急需要在生產(chǎn)工藝上進(jìn)一步進(jìn)行改良。技術(shù)實(shí)現(xiàn)要素:目的在于克服現(xiàn)有技術(shù)存在的不足，天津進(jìn)口維生素C乙基醚，天津進(jìn)口維生素C乙基醚,而提供一種工藝簡(jiǎn)單、合理，天津進(jìn)口維生素C乙基醚,生產(chǎn)成本低,產(chǎn)品總質(zhì)量收率高的Vc乙基醚生產(chǎn)方法。維生素C乙基醚對(duì)膠原質(zhì)的構(gòu)成和合成具有修復(fù)作用。天津進(jìn)口維生素C乙基醚</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="天津進(jìn)口維生素C乙基醚,維生素C乙基醚" src="https://tyunfile.71360.com/UploadFile/shbeicanghuagong/637326788773027343/6779282.png"></div><p style="text-indent:25px">眾所周知，維生素C是一種強(qiáng)烈的還原劑，它具有抗氧化的作用，淡化黑色素的顏色，是非常受寵的美白但維生素C也有著其很難克服的缺點(diǎn)，既怕光，又怕熱，更怕氧化，一旦接觸氧氣，還原力會(huì)全部喪失，而且不易被皮膚真正吸收，皮膚利用度低。相對(duì)維C而言，VC乙基醚作為維生素C的衍生物，它保留了維生素C的氧化還原作用而且非常穩(wěn)定，是不變色的維生物C衍生物，很容易穿透角質(zhì)層進(jìn)入皮革層，進(jìn)入皮膚后被生物酶分解發(fā)揮VC的作用，提高VC的利用度，從而起到更好的淡斑美白功效,是全世界安全美白產(chǎn)品的新寵。天津進(jìn)口維生素C乙基醚維生素C乙基醚淡化黑色素的顏色，是一種眾所周知的美白產(chǎn)品。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="天津進(jìn)口維生素C乙基醚,維生素C乙基醚" src="https://tyunfile.71360.com/UploadFile/shbeicanghuagong/637326788700253906/6677097.png"></div><p style="text-indent:25px">維生素C乙基醚所述的美白淡斑組合物及美白淡斑護(hù)膚品，所述美白淡斑組合物分由VC乙基醚、熊果苷、白芷提取物、煙酰胺、甘草酸二鉀、野菊維素組成?？梢酝ㄟ^(guò)有效阻礙或阻止皮膚黑色素的生成、轉(zhuǎn)移，可以快速、有效地達(dá)到美白效果；能夠有效地解決美白活性成分易分解、易氧化、易變色等問(wèn)題，降低了光線(xiàn)、熱對(duì)功效成分的影響，使其活性降低的問(wèn)題；使用維生素C乙基醚所述的美白淡斑組合物及美白淡斑護(hù)膚品沒(méi)有其他作用，安全性好，能達(dá)到長(zhǎng)久美白淡斑作用。</p><p style="text-indent:25px">用維生素C乙基醚到底避光不避光？這個(gè)問(wèn)題可以說(shuō)是眾說(shuō)紛紜。因?yàn)榫S生素C乙基醚的不穩(wěn)定性，在一定的光照下可能會(huì)失活。但用維生素C乙基醚的護(hù)膚品其實(shí)并不會(huì)讓皮膚變黑，畢竟維生素C乙基醚還是個(gè)抗氧化劑??！白天用還能一定程度幫忙抵抗紫外線(xiàn)呢，讓皮膚更不容易暗沉。更何況現(xiàn)在很多護(hù)膚品中的維生素C乙基醚是相對(duì)穩(wěn)定的VC的泛生物。但依然有一些產(chǎn)品會(huì)提到讓你盡量在夜間使用，并不是因?yàn)樗芯S生素C乙基醚，而是因?yàn)楹袆e的成分。就是因?yàn)楹锌箟难嶙貦八狨?，所以推薦夜間使用。所以建議大家還是依照說(shuō)明書(shū)來(lái)，如果有這種情況品牌一般還是會(huì)特別說(shuō)明的。普遍來(lái)說(shuō)，維生素C乙基醚護(hù)膚品是不需要避光的。維生素C乙基醚維生素C以及其衍生物阻抑酪氨酸酶的效果。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="天津進(jìn)口維生素C乙基醚,維生素C乙基醚" src="https://tyunfile.71360.com/UploadFile/shbeicanghuagong/637326788671826171/6679575.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(guò)濾:將水解后的物料在加入15-25L 甲醇的條件下經(jīng)過(guò)過(guò)濾器過(guò)濾; 濃縮、溶解:經(jīng)過(guò)過(guò)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(guò)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(guò)過(guò)濾器過(guò)濾;結(jié)晶、離心和干燥:經(jīng)過(guò)過(guò)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。當(dāng)添加量為2%時(shí)，維生素C乙基醚有漂白和美白的雙重效果。天津進(jìn)口維生素C乙基醚</p><p style="text-indent:25px">含有維生素C乙基醚的產(chǎn)品不建議敏感肌膚每天使用。天津進(jìn)口維生素C乙基醚</p><p style="text-indent:25px">VC主要負(fù)責(zé)對(duì)抗水性自由基，是個(gè)不穩(wěn)定的淘氣寶寶，很不穩(wěn)定。護(hù)膚品中，一般都是它的衍生物維生素C乙基醚等。研究證明，護(hù)膚品中所添加的VC只有達(dá)到0.5%~2.0%的濃度才能真正起到美白功效，該濃度的維生素C乙基醚則能幫助緊致肌膚。所謂的緊致是它可以參與進(jìn)膠原蛋白合成的過(guò)程中，增加肌膚中膠原蛋白的數(shù)量并促進(jìn)膠原蛋白的連接。有實(shí)驗(yàn)顯示，持續(xù)使用6個(gè)月維生素C乙基醚護(hù)膚，肌膚紋理的排列方向發(fā)生了變化：從方向較為一致變?yōu)榉较螂s亂的網(wǎng)狀結(jié)構(gòu)，正是老化肌和年輕肌的特點(diǎn)。天津進(jìn)口維生素C乙基醚</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/3010868.html</p></div></div></div></div></div><div id="8qcjq2h" class="page-right twoColRt"><div id="uip72sn" class="box01 margin10 clearfix"><h3><a 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