发明名称 |
Continuous recovery of styrene from a styrene-containing mixture |
摘要 |
Styrene is recovered continuously from a styrene-containing mixture by distillation of the mixture in a cascade of n distillation columns, where (i) a feed stream comprising a stabilizer system is fed into the first column and/or a stabilizer system is introduced into at least one distillation column upstream of the nth distillation column, where the stabiliser system comprises N-oxyl radicals; (ii) a high boiler fraction having a boiling point higher than that of styrene and comprising the stabilizer system accumulates in the bottom of the nth distillation column; (iii) a substream of the high boiler fraction is recirculated and introduced into at least one distillation column upstream of the nth distillation column; (iv) the remainder of the high boiler fraction is discharged from the process.
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申请公布号 |
US2004019247(A1) |
申请公布日期 |
2004.01.29 |
申请号 |
US20030456783 |
申请日期 |
2003.09.05 |
申请人 |
BASF AKTIENGESELLSCHAFT |
发明人 |
MITULLA KONRAD;SUTORIS HEINZ FRIEDRICH |
分类号 |
B01D3/32;C07C7/05;C07C7/20;(IPC1-7):C07C7/00 |
主分类号 |
B01D3/32 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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