发明名称 |
Process for the preparation of beta-phase quinacridone |
摘要 |
A process for producing beta-phase quinacridone by (a) reacting 2,5-dianilino-terephthalic acid with polyphosphoric acid in the presence of 2,5-dianisidino-terephthalic acid at a reaction temperature of at least 85° C.; (b) diluting the reaction mixture with water; (c) drowning the diluted mixture in a water-miscible alkanol; (d) heating the slurry at a temperature of from 100 to 130° C. at a pressure of 20 to 50 psi; and (e) recovering the beta-phase quinacridone.
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申请公布号 |
US6494949(B2) |
申请公布日期 |
2002.12.17 |
申请号 |
US20010755451 |
申请日期 |
2001.01.05 |
申请人 |
SUN CHEMICAL CORPORATION |
发明人 |
SUNG EDWARD;KOZAK KATHLEEN M.;ROBERTSON GEORGE H.;CHAMBERLAIN TERRENCE R. |
分类号 |
C09B48/00;C09B67/22;C09B67/52;(IPC1-7):C09B48/00 |
主分类号 |
C09B48/00 |
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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