| 发明名称 |
Recovery of methyl esters of aromatic acids and glycols from thermoplastic polyester scrap. |
| 摘要 |
<p>Dimethyl terephthalate vapor and glycol vapor are prepared by treating polyester polymer with excess methanol vapors at a temperature above 230 DEG C. The excess methanol acts as a carrier gas for the dimethyl terephthalate and the glycol. <IMAGE></p> |
| 申请公布号 |
EP0484963(A2) |
申请公布日期 |
1992.05.13 |
| 申请号 |
EP19910119061 |
申请日期 |
1991.11.08 |
| 申请人 |
E.I. DU PONT DE NEMOURS AND COMPANY |
发明人 |
MICHEL, ROBERT EVERETTE |
| 分类号 |
C07C31/20;C07C29/09;C07C67/03;C07C69/80;C07C69/82;C08J11/24 |
主分类号 |
C07C31/20 |
| 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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