发明名称 |
PROCESS FOR MAKING PHENYLENE DIOXYDIACETIC ACID AND USE THEREOF |
摘要 |
<p>A process for making phenylene dioxydiacetic acid comprises (a) contacting a dihydroxybenzene under reaction conditions with a salt of haloacetic acid in a solution without adding a haloacetic acid to produce a salt of phenylene dioxydiacetic acid; and (b) optionally converting the salt of phenylene dioxydiacetic acid to free phenylene dioxydiacetic acid. In some embodiments, 1,3-phenylene dioxydiacetic acid (RDOA) is made by reacting resorcinol with sodium chloroacetic acid in a reaction mixture with a pH in the range of about 7 to about 11 and at a temperature from about 70 °C to 105 °C. By adjusting the reactions conditions, a relatively high yield of 1,3-phenylene dioxydiacetic acid (i.e., greater than 80%) is obtained. The purified acid can be used in the synthesis of polyester, such as polyethylene terephthalate.</p> |
申请公布号 |
WO2007005086(A1) |
申请公布日期 |
2007.01.11 |
申请号 |
WO2006US13768 |
申请日期 |
2006.04.13 |
申请人 |
INDSPEC CHEMICAL CORPORATION;DURAIRAJ, RAJ, B.;TACKIE, MICHAEL, N. |
发明人 |
DURAIRAJ, RAJ, B.;TACKIE, MICHAEL, N. |
分类号 |
C08G63/78;C07C51/367;C07C59/70;C08G63/672 |
主分类号 |
C08G63/78 |
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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