4-甲基-2-戊醇催化脱氢制甲基异丁基酮反应工艺.pdf

石油化工
1170
PETROCHEMICAL TECHNOLOGY
2012年第41卷第10期
4-甲基-2-戍醇催化脱氢制
甲基异丁基酮反应工艺
殷玉圣
(南化集团研究院,江苏南京210048)
摘要」在铜系催化剂作用下,4-甲基-2-醇(MIBC)进行催化脱氢反应制备了甲基异丁基酮(MIBK),考察了原料组成、
反应温度、 LEVS、N2与原料的配比对脱氢反应的影响,分析了催化剂的耐热性能,并对使用前后的催化剂进行了表征。实
验结果表明,MIBC脱氢反应的较佳条件为:反应压力0.IMPa、反应温度190~230℃、LHVS在1.00h以下、原料中MIBK和
MIBC的总含量大于99%(w),在此条件下,MIBC转化率可控制在60%以上,MIBK选择性可达到98%以上。以脱氢产物直接
作为脱氡原料进行循环脱氢实验时发现,经过4次脱氢反应后,产物中MIBK含量达到98%(w)以上。催化剂经耐热处理后,
MIBC转化率下降了1.5%,MIBK选择性基本不变。表征结果显示,与使用前的催化剂相比,使用后及耐热后的催化剂的比
表面积和孔体积均减小,活性组分铜晶粒的粒径增大
关键词」4-甲基-2-戊醇:甲基异丁基酮:铜系催化剂;催化脱氢
文章编号]1000-8144(2012)10-1170-05
中图分类号」TQ032.4
[文就标识码]A
Dehydrogenation of Methyl Isobutyl Carbinol to Methyl Isobutyl Ketone
Yin Yusheng
( Research Institute of Nanjing Chemical Industry Group, Nanjing Jiangsu 210048, China
I Abstract J Methyl isobutyl ketone(MIBK)was prepared by the dehydrogenation of methyl
isobutyl carbinol(MBC )over a Cu-based catalyst. The effects of raw material composition, reaction
temperature, LHSV and gas/liquid mole ratio on the dehydrogenation were investigated. The
thermal stability of the catalyst was studied. The catalysts before and after the dehydrogenation were
characterized y means of XRD and pore tructure analyzer. The results show that under the optimum
conditions of pressure 0.1 Mpa, reaction temperature 190-230G, LHSV 1.00 h"and the total
content of MIBK and MBC more than 99%(w), the conversion of MIBC and selectivity to MIBK
can reach more than 60% and more than 98%, respectively. When the dehydrogenation products were
directly used as raw materials and after 4 cyclic dehydrogenation runs were conducted, the content
of MIBK in the products could reach more than 98%(w). After the thermal treatment of the catalyst
the conversion of MIBC decreased by 11. 5%, but the selectivity to MIBK was almost unchange
The characterization results demonstrate that both the specific surface area and the pore volume of the
catalysts drop but the crystalline size of the active content Cu grow up after the dehydrogenation or
overheat
I Keywords] methyl isobutyl carbinol; methyl isobutyl ketone; copper-based catalyst; catalytic
dehydrogenation
防老剂6PPD(又称防老剂4020)的化学名称异丁基(MIBK)在催化剂作用下加気合成。该方
为N-(1,3-二甲基丁基)Mー苯基对苯二胺,是
种白色固体,置于空气中氧化为褐色固体,可用做
收稿日期」2012-04-20;[修改稿日期]2012-07-18。
橡胶防老剂,适用于天然橡胶和合成胶。防老剂『作者简介」殿玉圣(1964-),男,江苏省姜堰市人,大学,高
6PPD的生产方法23主要采用对氨基二苯胺与甲基级工程师,电话025-5701142,电邮yyszyj(@sohu.com