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    • 6. 发明申请
    • Method for the production of a dicarboxylic acid from acrylic acid
    • 从丙烯酸生产二羧酸的方法
    • US20060122425A1
    • 2006-06-08
    • US10519523
    • 2003-07-04
    • Peter BasslerStefan MaixnerJens Scheidel
    • Peter BasslerStefan MaixnerJens Scheidel
    • C07C51/347
    • C07C67/303C07C51/09C07C51/36C07C67/10C07C67/347C07C55/14C07C57/16C07C57/13C07C69/54C07C69/44C07C69/593
    • A process for the preparation of a dicarboxylic acid of the formula (I) —H—OOC-(n-C4Hx)—COO—H  (I)where x is 6 or 8, starting from acrylic acid, which comprises a) reacting a dicarboxylic acid diester of the formula (II) R1—OOC-(n-C4Hx)—COO—R2  (II)where x is 6 or 8, and R1 and R2, independently of one another, are C1-, C2-, C3- or C4-alkyl, aryl or heteroaryl and may be identical to or different from one another, with acrylic acid to give a dicarboxylic acid of the formula (I) and a mixture of acrylic acid esters of the formulae C2H3—COOR1 and C2H3—COOR2, where R1 and R2 are as defined above, b) separating the dicarboxylic acid of the formula (I) obtained in step a) from the reaction mixture obtained in step a), c) dimerizing the C2H3—COOR1, C2H3—COOR2 or mixture thereof obtained in step a) to give an n-butenedicarboxylic acid diester, and d) cleaving the dicarboxylic acid diester obtained in step c) into the corresponding dicarboxylic acid of the formula (I).
    • 制备式(I)的二羧酸的方法<?in-line-formula description =“In-line Formulas”end =“lead”→H-OOC-(nC 4) &lt;&lt; x&gt; x) - COO-H(I)<?in-line-formula description =“In-line Formulas”end =“tail”?>其中x是6或8,从 丙烯酸,其包括:a)使式(II)的二羧酸二酯与式(II)中的<?in-line-formula description =“In-line Formulas”end =“lead”→R& OOC-(nC 4 H x) - COO-R 2(II)<?在线公式描述=“在线 式“end =”tail“?>其中x为6或8,R 1和R 2彼此独立地为C 1〜 C 1 -C 3 - ,C 3 - 或C 4 - 烷基,芳基或杂芳基,并且可以相同或不同 另一个与丙烯酸反应,得到式(I)的二羧酸和式C 2 H 3 -COOR 1的丙烯酸酯的混合物 &lt; 2&gt;和&lt; 2&gt;&lt; 3&lt; 3&gt; 其中R 1和R 2如上所定义,b)将步骤a)中获得的式(I)的二羧酸与 在步骤a)中获得的反应混合物,c)使C 2 H 3 -NOROR 1,C 2 H 2, H 3 -COOR 2或其步骤a)中获得的混合物,得到正丁二酸二酯,和d)将步骤c)中得到的二羧酸二酯切割成 相应的式(I)的二羧酸。