公开(公告)号：US20140319417A1

公开(公告)日：2014-10-30

申请号：US14261932

申请日：2014-04-25

Applicant: BASF SE

Inventor： Friedrich-Georg MARTIN ,  OLIVER ODENWALD

IPC: C07B63/04

CPC classification number: C07B63/04 ,  B01J4/001 ,  B01J19/002 ,  B01J2219/00272

Abstract: The present invention relates to a process for restabilizing free-radically polymerizable monomers. The process comprises the steps: (a) introduction of a solution of an inhibitor of the free-radical polymerization by means of an inert pressurized gas into a vessel (1) comprising the monomers via a line (10) which comprises an ascending region, and (b) mixing of the contents of the vessel and the inhibitor solution by blowing gas through the line (10). In step (a), the flow velocity of the pressurized gas is set so that plug flow or annular flow is obtained as flow regime of the inhibitor solution and in step (b) the superficial gas velocity is set to ≧0.1 mm/s. The present invention further relates to a supply unit (11) for carrying out the process.

Abstract translation: 本发明涉及可自由基聚合的单体的再稳定化方法。 该方法包括以下步骤：（a）通过惰性加压气体将自由基聚合抑制剂的溶液通过包括上升区域的管线（10）引入包含单体的容器（1）中， 和（b）通过将管线（10）吹入气体来混合容器的内容物和抑制剂溶液。 在步骤（a）中，设定加压气体的流速，使阻塞溶液的流动状态获得塞流或环流，在步骤（b）中，表观气体速度设定为≥0.1mm/ s。 本发明还涉及一种用于执行该过程的供应单元（11）。