乙酸甲酯的催化精馏水解实验研究.pdf

第31卷第4期
化学工业与工程技术
2010年8月
Journal of Chemical Industry & Engineering
Aug.,2010
乙酸甲酯的催化精馏水解实验研究
童阜广
(南京化工职业技术学院,江苏南京210048)
要:在自行设计的催化精馏塔中,以 Amberlyst35wet阳离子交换树脂为催化剂,全回流操作下,
对乙酸甲酯催化精馏水解进行了研究。考察了空速、塔高度、回流进料比(体积比)以及进料中水垂物质
的量比等操作条件对水解反应的影响。实验结果表明,在空速0.09min',催化剂装填高度80cm,提馏
段7块塔板,回流进料比5:1,进料中水酯物质的量比6.5:1时,乙酸甲酯水解率达到83.5%。
关键词:乙酸甲酯;催化精馏;阳离子交换树脂;水解
中图分类号:TQ225.24+1文献标识码:A文章编号:1006-7906(2010)04-0015-03
Experimental study on hydrolysis of methyl acetate
using catalytic distillation
TONG Fuguang
( Nanjing College of Chemical Technology, Nanjing 210048, China)
Astac Choosing Amberlyst wet(exchange resin as analyst and total reflux operation, a catalytic distillation column
is designed to ydrolysis the methyl acetate. The influence of the factors, such as the feed space velocity, the tow height, the ratio of
reflux to feed (volume)and the feed mole ratio of waer o methyl aceae on the conversion of methyl acetate are researched in the labo-
ratory. The experimental results show that when the feed space velocity 0.09 min,the packing height of the catalyst of reac-
tion section and 7 column trays of stripping section, the ratio of reflux to feed 51, and the feed mole ratio of water to methyl acetate
6.51, the conversion of methyl acetate reaches to 83. 5%
Key words: Methyl acetate Catalytic distillations Catiom-exchange resin; Hydrolysis
精对苯二甲酸生产中,作为溶剂的乙酸会大量消式,水解率达57.7%;尚会建等将催化剂散装,水解
耗并转化为乙酸甲酯们,回收的乙酸甲酯浓度偏低,率达75.0%。在他们的研究中,都是通过改变催化
经济价值较低,工业用途有限,一般将其水解为乙酸剂的种类及装填方式,以提高乙酸甲酯的水解率。
和甲醇再重新利用。目前大多采用催化精馏法水解
笔者选择 Amberlyst35wet阳离子交换树脂为催
乙酸甲酯,该工艺将反应与精馏操作结合在一起,产
物不断蒸出反应区,打破了反应平衡,使反应进行得
收稿日期:2010-06-25
更彻底,水解率提高,流程简化,能耗降低?。
作者简介:阜广(1981-),男,硕士,助教,主要从事酯类水
近年来,催化精馏技术应用于乙酸甲酯水解的研解研究工作。
究越来越多-?。 Pal pen等将催化剂采用捆扎包形
E-mail: 58102883@qq com
etrabedron,1997,53(37):12621
_7J GIGUERE R I, BRAY T L, CAN D, et al Application [9] BRITTANY L, HAYES D. Microwave Synthesis-chem-
of Commercial Microwave Ovens to Organic Synthesislji.
istry at the Speed of Light [M]. Matthews: CEM Pub-
Tetrahedron Letter, 1986, 27: 4945
lishing,2002:97-100.
[8] SUBBUAJ K, KAROCH R, MURUGESH M G, et al. [10] HUANG L, KASHIWADA Y, COSENTINO L M, et
Regioselective total synthesis of(H) -neorautane,
al. ANTI-AIDS agents 15. Synthesis and anti-hiv activi
neorautania and their analogs, microwave mediated synthe-
of dibydroseselins and related analogs [J1. J Med
sis of 2H -chromenes from propargyl phenyl ethers [J]
Chem,1994,37:3947-3955
万方数据