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第 37 卷第 4 期Vol. 37 No. 4
2007 年 8 月Aug 2007

所屬欄目:染料、顏料及涂料

六亞甲基二氨基甲酸正丁酯熱分解制備1,6-六亞甲基二異氰酸酯新型催化劑研究
陳 浪,鄧劍如,凡美蓮,單婷婷,雷 貝,王海波 (湖南大學(xué) 化學(xué)化工學(xué)院,湖南 長(cháng)沙 410082)
摘 要:合成了8種吡啶-2-甲酸鹽,將其用作液相熱分解六亞甲基二氨基甲酸正丁酯(HDU-B)制備1,6-六亞甲基二異氰酸酯(HDI)的催化劑,考察了其催化活性,實(shí)驗結果表明吡啶-2-甲酸鋅具有較好的催化性能。通過(guò)熱分解實(shí)驗確定了適宜的工藝條件:吡啶-2-甲酸鋅為催化劑,適宜用量為HDU-B質(zhì)量的1.0%~1.2%,真空度0.094 MPa,反應溫度260~270℃,在此條件下,HDI收率88.7%,時(shí)空產(chǎn)率282.8 g/(g cat·h),優(yōu)于目前的文獻報道結果。
關(guān)鍵詞:HDI;六亞甲基二氨基甲酸正丁酯;催化熱分解;吡啶-2-甲酸鋅
中圖分類(lèi)號:Q623.7  文獻標識碼:A  文章編號:1009-9212(2007)04- 0044-04
Investigation on the New Catalyst for Preparing 1,6-Hexamethylene Diisocyanate from Thermal Decomposition of Hexamethylene di-n-Butylurethane
CHEN Lang ,DENG Jian-ru ,FAN Mei-lian ,SHAN Ting-ting,LEI Bei,WANG Hai-bo (Department of Chemistry and Chemical Engineering ,Hunan University,Changsha 410082,China)
Abstract:The eight kinds of metal picolinates were synthesized and used as catalysts for the thermal decomposition of hexamethylene di-n-butylurethane(HDU-B)to prepare 1,6-hexamethylene diisocyanate (HDI) in the liquid phase .The experiment results showed that zinc picolinate had the highest catalystic activity .The optimum reaction conditions was obtained by thermal decomposition as following: zinc picolinate used as the catalyst (1.0%~1.2% by weight based on the weight of HDU-B),vacuum pressure 0.094 MPa and reaction temperature 260~270℃. Under the above conditions,the HDI yield and time-space yield reached 88.7% and 282.8 g/(g cat·h), respectively,which were superior to the reported data in the literatures .
Key words:HDI;1,6-hexamethylene di-n-butylurethan;thermal decomposition;zinc picolinate
作者簡(jiǎn)介:陳 浪(1983-),男,湖南寧鄉人,碩士研究生,研究方向:精細化工產(chǎn)品及高分子方向。(E-mail:chen-adolf@163.com)
聯(lián) 系 人:鄧劍如(1964-),教授,主要從事精細化工產(chǎn)品及高分子方向的研究和開(kāi)發(fā)。(E-mail:dengjianru@hnu.cn)
收稿日期:2007-05-22
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