发明名称 |
System and a process for obtaining high purity phenanthrene from phenanthrene enriched coal tar fraction |
摘要 |
The present invention relates to a system and a process for obtaining phenanthrene of about 95% purity from coal tar distilled fraction containing crude phenanthrene by performing fractional distillation at a reduced pressure of 50 mm mercury and at a temperature range of 160-180° C. to obtain first distilled fraction containing acenaphthene and fluorene; a second distillate fraction at a temperature range of 200-230° C. containing phenanthrene, anthracene and traces of carbazole; followed by re-distilling the second distillate fraction at a temperature range of 210-224° C. to finally obtain pure phenanthrene and a residue which is again used for the recovery of residual phenanthrene by re-distillation at a temperature range of 210-224° C.
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申请公布号 |
US2003183499(A1) |
申请公布日期 |
2003.10.02 |
申请号 |
US20020107284 |
申请日期 |
2002.03.26 |
申请人 |
TIWARI KAUSHAL KISHORE;RAO SUKURU RAMAKRISHNA;THAKUR SANJAY KUMAR;BANERJI SOMNATH |
发明人 |
TIWARI KAUSHAL KISHORE;RAO SUKURU RAMAKRISHNA;THAKUR SANJAY KUMAR;BANERJI SOMNATH |
分类号 |
B01D3/14;B01D3/32;C07C7/04;C10C1/08;(IPC1-7):B09B3/00;C10B57/00 |
主分类号 |
B01D3/14 |
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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