第 41 卷第 5 期 |  | Vol. 41 No. 5 | 2011 年 10 月 | Oct 2011 |
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所屬欄目:香精香料
3-環(huán)己基丙酸的合成 |
寧春利1,馮世強2,張春雷1
(1. 上海華誼集團 技術(shù)研究院,上海 200241;2. 上海華誼丙烯酸有限公司,上海 200137) |
摘 要:以丙烯酸甲酯和環(huán)己醇為原料,經(jīng)過(guò)酯交換反應合成γ,γ-環(huán)戊基丁內酯,γ,γ-環(huán)戊基丁內酯加氫得到3-環(huán)己基丙酸?疾炝2步反應的催化劑和反應條件對產(chǎn)物收率的影響。研究結果表明,酯交換反應的優(yōu)化條件為:過(guò)氧化二叔丁基為引發(fā)劑,n(丙烯酸甲酯)∶n(環(huán)己醇)=1∶4,反應溫度160℃,反應時(shí)間6 h;在該條件下,γ,γ-環(huán)戊基丁內酯的收率可達93.3%;以0.5%鉛/氧化鋁為催化劑,γ,γ-環(huán)戊基丁內酯加氫反應的優(yōu)化條件為:反應溫度為250℃,γ,γ-環(huán)戊基丁內酯空速0.2 h-1,反應壓力3.0 MPa,氫氣空速500 h-1,在該條件下,γ,γ-環(huán)戊基丁內酯轉化率78.0%,環(huán)己基丙酸選擇性80.2%。 |
關(guān)鍵詞:3-環(huán)己基丙酸;菠蘿酯;丙烯酸甲酯;環(huán)己醇;γ,γ-環(huán)戊基丁內酯 |
中圖分類(lèi)號:TQ657.1;O621.25 文獻標識碼:A 文章編號:1009-9212(2011)05-0041-04 |
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Synthesis of 3-Cyclohexylpropionic Acid |
NING Chun-li1,FENG Shi-qiang2,ZHANG Chun-lei1
(1. Technology Research Institute of Shanghai Huayi Group,Shanghai 200241,China;2. Shanghai Huayi Acrylic Acid Co.,Ltd.,Shanghai 200137,China) |
Abstract:3-Cyclohexylpropionic acid was prepared by hydrogenation of γ,γ-cyclopentyl butyrolactone,which was synthesized by transesterification of methyl acrylate and cyclohexanol. The influences of catalyst and reaction conditions have been studied. The optimum conditions for the transesterification include the temperature of 160℃,the molar ratio of methyl acrylate to cyclohexanol of 1 to 4,the reaction time of 6 hours and di-tert-butyl peroxide as the initiator. Over the catalyst of 0.5%Pd/Al2O3,the conversion of γ,γ-cyclopentyl butyrolactone and the selectivity of 3-cyclohexylpropionic acid can reach 78.0% and 80.2%,respectively,under the optimum condition of 250℃,3.0 MPa,LHSV of γ,γ-cyclopentyl butyrolactone of 0.2 h-1 and GHSV of H2 of 500 h-1. |
Key words:3-cyclohexylpropionic acid;pineapple ester;methyl acrylate;cyclohexanol; γ,γ-cyclopentyl butyrolactone |
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作者簡(jiǎn)介:寧春利(1971),男,黑龍江延壽人,高級工程師,碩士,研究方向:工業(yè)催化。(E-mail:clning@shhuayitec.com)
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收稿日期:2011-09-12
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