发明名称 |
A PROCESS FOR IMPROVING YIELDS IN A DISPROPORTIONATION REACTION (HIGH YIELD HENKEL) |
摘要 |
Disclosed is a process for disproportionation of potassium naphthoate to the dipotassium salt of 2,6-NDA which gives reproducible improved yields of up t o 40 % which comprises: (a) reacting naphthoic acid in the presence of excess base to produce a disproportionation feed comprising a finely dispersed disordered salt mixture of excess base salts and naphthoic acid salts, where in the feed is prepared by the steps of: (1) Reacting naphthoic acid in the presence of excess base selected from the group consisting of carbonates and bicarbonates to form a salt; (2) Drying said salt mixture by a method which forms a highly mixed disordered salt mixture characterized by a differential scanning calorimeter (DSC) signature characterized by low melting peaks not previously observed in the salt; and (b) disproportionating said solid salts in the presence of a disproportionation catalyst to form the dipotassium sal ts of 2,6-NDA.
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申请公布号 |
CA2383354(A1) |
申请公布日期 |
2001.03.08 |
申请号 |
CA20002383354 |
申请日期 |
2000.08.08 |
申请人 |
MOSSI & GHISOLFI OVERSEAS S.A. |
发明人 |
DUBOIS, DONN A.;PFREHM, SUSAN A.;BUECHELE, JAMES L.;KING, WILLIAM L.;BROWNSCOMBE, THOMAS L. |
分类号 |
C07C51/347;B01J27/232;C07B61/00;C07C51/02;C07C51/15;C07C51/265;C07C51/41;C07C51/42;C07C51/43;C07C51/47;C07C51/487;C07C63/38;C08G63/189;(IPC1-7):C07C51/41;C07C63/15 |
主分类号 |
C07C51/347 |
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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