337P日本大胆欧美裸体艺术_久久久久精品无码专区_一个人看的免费视频WWW中文字幕_欧美熟妇精品视频网免费观看
第 49 卷第 2 期Vol. 49 No. 2
2019 年 4 月Apr 2019

所屬欄目:香精香料

臭氧氧化法合成2,3-丁二酮
何 磊1,2,3,4,宋夢(mèng)新1,2,潘 苗1,2 (1. 淮陰工學(xué)院 礦鹽資源深度利用技術(shù)國家地方聯(lián)合工程研究中心,江蘇 淮安 223003;2. 淮陰工學(xué)院 江蘇省特色資源開(kāi)發(fā)與藥用研究重點(diǎn)實(shí)驗室,江蘇 淮安,223003;3. 淮安萬(wàn)邦香料工業(yè)有限公司,江蘇 淮安 223003;4. 南開(kāi)大學(xué) 化學(xué)學(xué)院,天津 300071)
摘 要:以乙醛為原料,經(jīng)過(guò)縮合和氧化兩步反應合成了2,3-丁二酮,在氧化反應時(shí)采用臭氧氧化工藝,優(yōu)化工藝條件為:n(水)∶n(乙偶姻)∶n(乙酸)=1∶0.51∶0.007 5,臭氧氧化溫度10℃,臭氧流速0.3 L·min-1,攪拌速度600 r·min-1,反應時(shí)間90 min;在上述條件下,2,3-丁二酮收率為96.2%,工業(yè)合成試驗的分離收率仍可達95.0%。采用熔點(diǎn)檢測、FTIR、1H NMR、13C NMR和質(zhì)譜技術(shù)對產(chǎn)物結構進(jìn)行了表征與確證。
關(guān)鍵詞:2,3-丁二酮;乙醛;臭氧氧化
中圖分類(lèi)號:TQ224.24  文獻標識碼:A  文章編號:1009-9212(2019)02-0066-04
Synthesis of 2,3-Butanedione by Ozonization
HE Lei1,2,3,4, SONG Meng-xin1,2, PAN Miao1,2 (1. National & Local Joint Engineering Research Center for Mineral Salt Deep Utilization, Huaiyin Institute of Technology, Huaian 223003, Jiangsu, China; 2. Jiangsu Key Laboratory of Regional Resource Exploitation and Medicinal Research, Huaiyin Institute of Technology, Huaian 223003, China; 3. Wanbang Perfume Industrial Limited Company, Huaian 223003,China; 4. College of Chemistry, Nankai University, Huaian 223003, China)
Abstract:2,3-Butanedione was synthesized by condensation and ozonization using acetaldehyde as the raw material. The ascertained optimum conditions were as followings: mole ratio of water, acetoin and acetic acid was of 1∶0.51∶0.007 5; ozonization temperature was of 10℃;the ozone flow was of 0.3 L·min-1; mixing speed was of 600 r·min-1, ozonization time was of 90 min. Under the above conditions, a yield of 96.2% was achieved; the yield also reached up to 95.0% through the test by industrialized production. The structure of the obtained product was characterized by melting point test, FTIR, 1H NMR, 13C NMR and MS.
Key words:2,3-butanedione; acetaldehyde; ozonization
基金項目:江蘇省自然科學(xué)基金(BK20130420),江蘇省博士后科研資助計劃(2018K152C)。
作者簡(jiǎn)介:何 磊(1980-),男,江蘇淮安人,講師,博士,主要從事精細化工研究(E-mail:heleihuaina@hyit.edu.cn)。
收稿日期:2019-04-09
337P日本大胆欧美裸体艺术_久久久久精品无码专区_一个人看的免费视频WWW中文字幕_欧美熟妇精品视频网免费观看