公开(公告)号：US3711401A

公开(公告)日：1973-01-16

申请号：US3711401D

申请日：1971-03-08

Applicant: SYBRON CORP

Inventor： HAMILTON R ,  KINGSBURY A ,  ANDERSON J

IPC: B01J39/04 ,  B01J41/04 ,  B01J49/00 ,  B01D15/06

CPC classification number: B01J49/05 ,  B01J39/05 ,  B01J41/05 ,  B01J39/07

Abstract: Ion exchange columns containing a layer of weak resin and a layer of strong resin are regenerated by passing partially spent regenerant through the column to regenerate the weak resin and then passing fresh regenerant through the column to regenerate the strong resin. Efficient regeneration is achieved in a downflow regeneration process and silica and calcium sulphate precipitation problems are reduced. In some cases, it is desirable to soak the strong resin in regenerant after the weak regenerant as been passed through the column in order to improve separation of the resins, shorten the total regeneration time and remove additional silica ions. The processes are preferably practiced on systems of three or more columns in which the columns are sequentially exhausted and regenerated, with at least two columns being regenerated in series.

Abstract translation: 含有弱树脂层和强树脂的离子交换柱通过部分废旧再生剂通过柱再生，再生弱树脂，然后通过新鲜再生剂通过柱再生强树脂。 在下流再生过程中实现有效再生，二氧化硅和硫酸钙沉淀问题减少。 在一些情况下，为了改善树脂的分离，缩短总再生时间，除去附加的二氧化硅离子，希望在弱再生剂通过柱后，将强树脂浸渍在再生剂中。 这些方法优选在三个或更多个柱的系统上实施，其中柱依次耗尽和再生，其中至少两个柱被串联再生。