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Vinyl Acetate from Ethylene and Acetic Acid over Palladium-Gold
Vinyl acetate, the monomer for PVA wood glue, is made by oxidising ethylene and acetic acid together with oxygen in the gas phase, over a palladium-gold shell catalyst in steam-heated tube reactors at 150–160 °C and 8–11 bar. About 92 % goes to vinyl acetate; the rest burns. A few ppm of hydroquinone keeps it from forming explosive peroxides in air.
The picture: our diagram of reactor, condenser and column.
高级
Continuous
说明
1
1
Oxidise over palladium-gold
Oxidise over palladium-gold
Feed ethylene, acetic acid vapour and oxygen through steam-heated tubes packed with palladium-gold catalyst at 150–160 °C and 8–11 bar.
此步骤所需材料：
乙烯350 公斤
乙酸（冰醋酸）750 公斤
氧200 公斤所需工具：
固定床管式反应器
钯金催化剂
气体压缩机2
2
Condense the product
Condense the product
Cool the reactor gas to condense vinyl acetate, water and unreacted acetic acid (our method). Send the unreacted ethylene back to the reactor.
所需工具：
冷凝器盘管气体压缩机3
3
Distil
Distil
Distil the vinyl acetate (boils at 72.7 °C) off the water and acetic acid (our method), and return the acid to the feed.
所需工具：
蒸馏塔装置4
4
Stabilise for storage
Stabilise for storage
Stir in 3–20 ppm hydroquinone; without it vinyl acetate forms explosive peroxides in air. Keep it away from flames: its vapour ignites easily.
此步骤所需材料：
对苯二酚10 克所需工具：
数字厨房秤5
5
Feed per tonne
Feed per tonne
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