发明名称 |
Method of purifying crude 2,6-naphthalenedicarboxylic acid dimethyl ester |
摘要 |
In a method of obtaining purified 2,6-naphthalenedicarboxylic acid dimethyl ester by vacuum distilling crude 2,6-naphthalenedicarboxylic acid dimethyl ester under conditions of application of heat, the improvement which comprises vacuum distilling a crude 2,6-naphthalenedicarboxylic acid dimethyl ester having an acid value (Af), as expressed in milligrams of KOH required for neutralizing the carboxyl groups contained in one gram of said crude 2,6-naphthalenedicarboxylic acid dimethyl ester, of from 1.0 to 50.
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申请公布号 |
US4048021(A) |
申请公布日期 |
1977.09.13 |
申请号 |
US19760725834 |
申请日期 |
1976.09.23 |
申请人 |
TEIJIN LIMITED |
发明人 |
TAKAMOTO, HIROMITSU;YAMAMOTO, KIYOSHI;TANEDA, NOBUO;MATSUBAYASHI, TORU;YAMASHITA, GENTARO |
分类号 |
C07C69/76;(IPC1-7):B01D3/10 |
主分类号 |
C07C69/76 |
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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