公开(公告)号：US3923839A

公开(公告)日：1975-12-02

申请号：US45719074

申请日：1974-04-02

Applicant: RHONE PROGIL

Inventor： DUMONT RENE ,  GOHAREL MAURICE ,  LAFONT JEAN-CLAUDE

IPC: C07D307/89 ,  C07C51/573

CPC classification number: C07C51/573 ,  C07C63/16

Abstract: Method of treating residues from the distillation of phthalic anhydride, avoiding pollution of the atmosphere and the zones for the discharge of such residues, and permitting easy handling of said residues. The method comprises drawing off a certain amount of the bottoms from the distillation column, subjecting the product drawn off to a thin layer evaporation operation, and spraying water onto the stream of the heavy fraction which flows away after said evaporation operation, and then collecting the product in water which is thus cooled and granulated.

Abstract translation: 处理邻苯二甲酸酐蒸馏残留物的方法，避免大气污染和排放这些残留物的区域，并容易处理所述残留物。 该方法包括从蒸馏塔中取出一定量的塔底物，将抽出的产物进行薄层蒸发操作，并将水喷洒到在蒸发操作之后流出的重馏分流中，然后收集 产物在水中被冷却和造粒。