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    • 10. 发明申请
    • PROCESS FOR MAKING PHENYLENE DIOXYDIACETIC ACID AND USE THEREOF
    • 制备苯乙烯二酸的方法及其用途
    • WO2007005086A1
    • 2007-01-11
    • PCT/US2006/013768
    • 2006-04-13
    • INDSPEC CHEMICAL CORPORATIONDURAIRAJ, Raj, B.TACKIE, Michael, N.
    • DURAIRAJ, Raj, B.TACKIE, Michael, N.
    • C08G63/78C08G63/672C07C51/367C07C59/70
    • C08G63/672C07C51/367C07C59/70
    • 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.
    • 制备亚苯基二氧基二乙酸的方法包括(a)在反应条件下使二羟基苯与卤代乙酸盐在溶液中接触而不添加卤代乙酸以产生亚苯基二氧二肟酸的盐; 和(b)任选将亚苯基二氧代二乙酸的盐转化为游离的亚苯基二氧基二乙酸。 在一些实施方案中,1,3-亚苯基二氧二氢乙酸(RDOA)是通过使间苯二酚与氯乙酸钠在反应混合物中反应制备的,反应混合物的pH为约7至约11,温度为约70℃至105℃ C。 通过调整反应条件,可以获得相当高的1,3-亚苯基二氧二氢乙酸的收率(即大于80%)。 纯化的酸可用于合成聚酯,如聚对苯二甲酸乙二醇酯。