Patent · US Expired

System for measuring the loading of an ion exchange filter

US4814090A · kind A · utility

10Cited by

3References

10Claims

0Family size

Inventors

Gerhard Kunz · Heiligenhaus, DE
Johannes C. Goebel · Nieder-Olm, DE

Key dates

Filing date	Aug 31, 1987
Grant date	Mar 21, 1989
Priority date	—
Expiry date	Aug 31, 2007

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01J49/85
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A temperature compensated differential between electrical conductivity measurements of a filter medium during passage therethrough of liquid being treated and measurement of the liquid alone after treatment, is utilized to calculate a conductivity ratio based on a reference value reflecting a minimum electrical conductivity measurement under ion saturation conditions in an ion-exchange filter. The filter is switched from an operational mode to a regenerating mode in response to detection of a predetermined conductivity ratio corresponding to approach of the filter to a clogged condition.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.