淮安維生素C乙基醚銷售廠上海北倉化工科技供應-b2b網(wǎng)站_b2b電子商務平臺【買產(chǎn)品】-上?？谄蚴称酚邢薰?/title><meta name="description" content="相對于維生素C，維生素C乙基醚（3-O-乙基抗壞血酸）是一種親油親水的兩性維生素C衍生物，這不僅使其在配方中能夠極為方便的使用，更加使其容易穿透角質層進入真皮層，進入真皮層后被生物酶分解發(fā)揮VC的作用，提高VC的利用度，從而起到更好的美白祛"><meta name="keywords" content="淮安維生素C乙基醚銷售廠,維生素C乙基醚"><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" content="no-transform" /> <meta http-equiv="Cache-Control" 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class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shbeicanghuagong/637326788596728515/9282784.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="cmtacof" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shbeicanghuagong/637326788596728515/9282784.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="b33egnk" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</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)品關鍵詞：</span>淮安維生素C乙基醚銷售廠,維生素C乙基醚</p><p><span>***更新：</span>2020-10-31 02:20:06</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="moqnuwn" 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: </span>021-60459206</p><p><span>地址: </span>金山大道4168號</p><p>[當前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="zeldfwd" class="page-proshow02"><p class="title">詳細說明</p><div id="fuwip33" class="box"><p><p style="text-indent:25px">相對于維生素C，維生素C乙基醚（3-O-乙基抗壞血酸）是一種親油親水的兩性維生素C衍生物，這不僅使其在配方中能夠極為方便的使用，更加使其容易穿透角質層進入真皮層，進入真皮層后被生物酶分解發(fā)揮VC的作用，提高VC的利用度，從而起到更好的美白淡斑的功效。除此以外，普通維生素C則很難被皮膚吸收，生物利用度很低，而維生素C乙基醚相對普通維生素C顯示出極高的穩(wěn)定性。目前國內生產(chǎn)的維生素C乙基醚產(chǎn)品在水溶液或是固體狀態(tài)保存的條件下均會有顏色逐漸變黃的現(xiàn)象，這極大的制約了該產(chǎn)品的保存和使用。主要是因為在目前的維生素C乙基醚的生產(chǎn)過程中，經(jīng)歷了從維生素C上保護基脫保護劑的過程，淮安維生素C乙基醚銷售廠。維生素C乙基醚可以溶于包括水，淮安維生素C乙基醚銷售廠，淮安維生素C乙基醚銷售廠、油、酒精在內的許多溶劑，因此可以混合與任何配方的溶劑中。淮安維生素C乙基醚銷售廠</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="淮安維生素C乙基醚銷售廠,維生素C乙基醚" src="https://tyunfile.71360.com/UploadFile/shbeicanghuagong/637326788596728515/9282784.png"></div><p style="text-indent:25px">一種維生素C乙基醚的合成方法，其特征在于包括如下步驟：（1）以維生素C為起始原料，以**縮二甲醇為反應物，以DMSO為溶劑，加熱至20-35℃，催化劑作用下反應3-5h，生成(R)-3,4-二羥基-5-[(S)-2,2-二甲基-1,3-二氧戊烷-4-基]呋喃-2(5H)-酮，反應產(chǎn)物經(jīng)減壓蒸餾去除低沸點生成物甲醇和剩余**縮二甲醇后直接投入下步反應，其中：**縮二甲醇與維生素C按3-10：1 vol/w投料，\n\t\t（2）投入堿和烷基化試劑，以DMSO為溶劑，于35-45℃反應12-24h，生成(R)-4-乙氧基-3-羥基-5-[(S)-2,2-二甲基-1,3-二氧戊烷-4-基]呋喃-2(5H)-酮，然后加入水和溶劑進行萃取處理。淮安維生素C乙基醚銷售廠維生素C乙基醚衍生物的出現(xiàn)，使以往護膚品中出現(xiàn)的問題得到了解決。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="淮安維生素C乙基醚銷售廠,維生素C乙基醚" src="https://tyunfile.71360.com/UploadFile/shbeicanghuagong/637326788614531250/839106.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;結晶、離心和干燥:經(jīng)過過濾器后的物料先送入結晶罐進行結晶,然后在混合有100-200L 的乙酸丙乙酯后送入離心機離心得到正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行干燥,在去除乙酯后得到Vc乙基醚干品。</p><p style="text-indent:25px">針對維生素C的市場應用局限性，**對其進行改良，使其充分發(fā)揮作用，目前zui常用的有兩種方法，一是把維生素C制成酯溶性的化妝品，這樣既穩(wěn)定了維生素C的還原力，而且還可以利用脂性物質易深入皮膚的特點，使其順利地進入皮膚。二是把維生素c制作成磷酸鎂鹽，因為磷酸鎂鹽經(jīng)皮膚吸收后，全被皮膚里的磷酸鹽分解酶所分解，從而發(fā)揮其作用。維生素C乙基醚（VC乙基醚）是一種親油親水的兩性維生素C衍生物，不僅保留了維生素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，而且它是親油親水兩性物質，這不僅使其在配方中能夠極為方便的使用，更加使其容易穿透角質層進入真皮層，進入皮膚后容易被生物酶分解而發(fā)揮維C的作用，從而提高其生物利用度。維生素C乙基醚在PH值 3.0-6.0的環(huán)境中更穩(wěn)定。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="淮安維生素C乙基醚銷售廠,維生素C乙基醚" src="https://tyunfile.71360.com/UploadFile/shbeicanghuagong/637326788751220703/812923.png"></div><p style="text-indent:25px">VC主要負責對抗水性自由基，是個不穩(wěn)定的淘氣寶寶，很不穩(wěn)定。護膚品中，一般都是它的衍生物維生素C乙基醚等。研究證明，護膚品中所添加的VC只有達到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膠原蛋白合成的過程中，增加肌膚中膠原蛋白的數(shù)量并促進膠原蛋白的連接。有實驗顯示，持續(xù)使用6個月維生素C乙基醚護膚，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)狀結構，正是老化肌和年輕肌的特點。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?；窗簿S生素C乙基醚銷售廠</p><p style="text-indent:25px">維生素C乙基醚和碳酸鈉作用可生成單鈉鹽，不致發(fā)生水解，因雙鍵使內酯環(huán)變得穩(wěn)定?；窗簿S生素C乙基醚銷售廠</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：如果肌膚非常敏感，那在使用含有高濃度維生素C乙基醚的產(chǎn)品前，建議先在局部使用以確定耐受性，如果肌膚沒有出現(xiàn)刺痛，持續(xù)泛紅的情況，就可以全臉使用，但要避開眼周。為了更好的讓肌膚適應這個有效的成分，剛開始建議隔天使用，一周后每天夜間使用一次即可，直到肌膚沒有任何不適感就可以早上也用了。含有高濃度維生素C乙基醚的產(chǎn)品不僅美白還能抗老：維生素C乙基醚是一種強抗氧化劑，能夠有效阻礙酪氨酸酶，防止肌膚變黑，淡化斑點，改善暗沉，這也是大家對于維生素C乙基醚都知道的護膚作用，不過，除了美白之外，含有高濃度維生素C乙基醚的產(chǎn)品還有對抗自由基，刺激膠原蛋白生成的效果，能改善紋路和肌膚彈性，讓肌膚看起來更加年輕?；窗簿S生素C乙基醚銷售廠</p><p 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