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    • 4. 发明授权
    • Process for producing xylylenediamine
    • 生产苯二甲胺的方法
    • US08759588B2
    • 2014-06-24
    • US13062334
    • 2009-08-27
    • Shinichi NagaoTatsuyuki KumanoKenji NakayaRyusuke ShigematsuKinji Kato
    • Shinichi NagaoTatsuyuki KumanoKenji NakayaRyusuke ShigematsuKinji Kato
    • C07C209/00
    • C07C209/48C07C211/27
    • The invention provides a process for producing xylylenediamine, including supplying a solution of phthalonitrile dissolved in a solvent to a reactor filled with a catalyst and hydrogenating the phthalonitrile to produce xylylenediamine, characterized in that the process includes halting supply of the solution; (2) bringing a washing liquid into contact with the catalyst, the washing liquid having a phthalonitrile content of 3 mass % or less and a xylylenediamine content of 1 mass % or more; and after completion of the contact, resuming supply of the solution, and employing the catalyst continuously in hydrogenation. Through the production process of the invention, the catalyst can be employed continuously for a long period of time, and the catalyst-related cost can be considerably reduced.
    • 本发明提供了一种生产苯二甲胺的方法,包括将溶于溶剂中的邻苯二甲腈溶液供应到填充有催化剂的反应器中,并使邻苯二甲腈氢化以产生苯二甲胺,其特征在于该方法包括停止溶液的供应; (2)使洗涤液与催化剂接触,洗涤液的邻苯二腈含量为3质量%以下,苯二甲胺含量为1质量%以上; 接触完成后,恢复溶液的供应,并在催化剂中连续使用催化剂。 通过本发明的制造方法,能够长时间连续使用催化剂,能够显着降低催化剂成本。
    • 10. 发明授权
    • Production of xylylenediamines
    • 生产二甲苯二胺
    • US07626057B2
    • 2009-12-01
    • US11768949
    • 2007-06-27
    • Tatsuyuki KumanoRyusuke ShigematsuKinji KatoKenji Nakaya
    • Tatsuyuki KumanoRyusuke ShigematsuKinji KatoKenji Nakaya
    • C07C209/00
    • C07C209/48C07C209/84C07C211/27
    • A method of producing xylylenediamine by a two-stage hydrogenation of a starting phthalonitrile in a solvent. The main steps of the method are a hydrogenation step 1 and a hydrogenation step 2. In the hydrogenation step 1, a solution of the starting phthalonitrile in the solvent containing liquid ammonia is fed to an inlet of a first reaction zone and the hydrogenation is carried out in the first reaction zone in the presence of a heterogeneous catalyst, to hydrogenate nitrile groups in the starting phthalonitrile to aminomethyl groups. A part of the hydrogenation product solution from the first reaction zone is circulated to the inlet of the first reaction zone and the rest is introduced into the hydrogenation step 2 where further undergoes the hydrogenation.
    • 通过在溶剂中通过起始邻苯二甲腈的两步氢化制备苯二甲胺的方法。 该方法的主要步骤是氢化步骤1和氢化步骤2.在氢化步骤1中,将起始邻苯二甲腈在含有液氨的溶剂中的溶液进料到第一反应区的入口,并进行氢化 在非均相催化剂存在下在第一反应区中,将起始邻苯二甲腈中的腈基氢化成氨基甲基。 将来自第一反应区的氢化产物溶液的一部分循环到第一反应区的入口,其余部分被引入氢化步骤2中,其中进一步进行氢化。