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    • 3. 发明授权
    • Cyclohexanone production process with multiple post-distillation
    • 环己酮生产过程多次后蒸馏
    • US08507729B2
    • 2013-08-13
    • US12808808
    • 2008-12-16
    • Godefridus Maria J. Van DortmontMarleen HorselsRudy Francois Maria Jozef PartonJohan Thomas Tinge
    • Godefridus Maria J. Van DortmontMarleen HorselsRudy Francois Maria Jozef PartonJohan Thomas Tinge
    • C07C45/82B01J8/00
    • C07C29/50C07C45/006C07C45/82C07C51/00C07C2601/14C07C49/403C07C55/14C07C35/08
    • The present invention relates to a method for continuously preparing cyclohexanone from phenol making use of a catalyst comprising at least one catalytically active metal selected from platinum and palladium comprising hydrogenating phenol to form a product stream comprising cyclohexanone and unreacted phenol; separating at least part of the product stream, or at least part of the product stream from which one or more components having a lower boiling point than cyclohexanone have been removed, into a first fraction comprising cyclohexanone and a second fraction comprising phenol and cyclohexanol, using distillation; separating the second fraction into a third fraction, rich in cyclohexanol, and a fourth fraction, rich in phenol, using distillation; —subjecting at least part of the fourth fraction to a further distillation step, thereby forming a fifth fraction and a sixth fraction, wherein the fifth fraction is enriched in phenol compared to the sixth fraction, and wherein the sixth fraction comprises side-products having a higher boiling point than phenol, and phenol; and which method is characterized in the additional step of continuously or intermittently separating at least part of the sixth fraction to yet a further distillation step, thereby forming a seventh fraction and an eight fraction, wherein the seventh fraction is enriched in phenol compared to the eight fraction, and wherein the eight fraction comprises side-products having a higher boiling point than phenol.
    • 本发明涉及使用包含至少一种选自铂和钯的催化活性金属的催化剂从苯酚连续制备环己酮的方法,所述催化活性金属包括氢化苯酚以形成包含环己酮和未反应苯酚的产物流; 将至少部分产物流或至少部分产物流从其中除去一个或多个沸点低于环己酮的组分的产物流转化成包含环己酮和包含苯酚和环己醇的第二馏分的第一馏分,使用 蒸馏 将第二馏分分离成富含环己醇的第三馏分和富含苯酚的第四馏分,使用蒸馏; - 将第四部分的至少一部分喷射至另一蒸馏步骤,从而形成第五馏分和第六馏分,其中第五馏分与第六馏分相比富含苯酚,并且其中第六馏分包含具有 沸点高于苯酚,苯酚; 并且该方法的特征在于连续或间歇地将至少部分第六馏分分离成另外的蒸馏步骤,从而形成第七馏分和八馏分的附加步骤,其中第七馏分富含苯酚,与八 馏分,其中八馏分包含沸点高于苯酚的副产物。