反应 #56347

反应方程式

ethylene

methyl acrylate

monoethyl maleate

tert-butyl peroxypivalate

ethylene

→

ethylene/methyl acrylate monoethyl maleate

溶剂

benzene

benzene

反应条件

后处理

1. 1
   workup.ADDITIONby adding 50 ml
2. 2
   其他at 170° C
3. 3
   其他The effluent from the autoclave passed through a let-down valve to a chamber at atmospheric pressure where most of the residual monomers and solvent

实验过程

A mixture of methyl acrylate, monoethyl maleate, and benzene (weight ratio: 68.28/2.46/29.26) was pressured to about 422 kg./sq. cm.; ethylene was separately pressured to about 422 kg./sq. cm. Separate streams of this mixture (0.91 kg./hr.) and ethylene (6.35 kg./hr.) were joined and pressured to 1900 kg./sq. cm. The resulting feed stream then entered the autoclave. Simultaneously, a catalyst solution, made by adding 50 ml. of tert-butyl peroxypivalate to 4.5 kg. of benzene was introduced at the rate of 0.00204 kg./hr. to keep the temperature at 170° C. The effluent from the autoclave passed through a let-down valve to a chamber at atmospheric pressure where most of the residual monomers and solvent flashed off. The ethylene/methyl acrylate/monoethyl maleate terpolymer thus isolated was freed from the small amount of residual volatiles by heating for 16 hours at 80° C. in a nitrogen stream. Acid-base titration indicated that 0.25 meq. of acid groups was present per gram of terpolymer. This corresponds to 3.6 weight percent of monoethyl ester of maleic acid.

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