发明名称 |
Process for recovering dimethyl terephthalate and ethylene glycol |
摘要 |
A process for recovering dimethyl terephthalate and ethylene glycol from a stream including aqueous ethylene glycol is described. Adding a dispersing agent to the stream renders it filterable, and a subsequent cooling of the stream containing the dispersing agent causes dimethyl terephthalate to precipitate in a form which can be removed by conventional filtration. The precipitated dimethyl terephthalate is of a quality and purity suitable for use in the manufacture of polyethylene terephthalate. A commercially valuable ethylene glycol stream is also recovered by the process.
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申请公布号 |
US5304673(A) |
申请公布日期 |
1994.04.19 |
申请号 |
US19930011411 |
申请日期 |
1993.01.29 |
申请人 |
ENVIROPUR WASTE REFINING AND TECHNOLOGY, INC. |
发明人 |
HERMANSON, PAUL M. |
分类号 |
C07C29/74;C07C29/94;C07C31/20;C07C67/62;(IPC1-7):C07C67/62;C07C27/26 |
主分类号 |
C07C29/74 |
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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