Method for removing rust from water softeners

• US 3,139,401 A
• Filed: 01/05/1962
• Issued: 06/30/1964
• Est. Priority Date: 01/05/1962
• Status: Expired due to Term

• Current Assignee: Clifford C. Hach
• Original Assignee: Clifford C. Hach
• Inventors: Hach, Clifford C.
• Application Number:
  US04/164,624
• Time in Patent Office: 907 Days
• US Class Current: 210/673
• CPC Class Codes: B01J 49/60 Cleaning or rinsing ion-exchange beds

Claims

1. IN THE PROCESS WHICH COMPRISES PASSAGE OF A LIQUID OVER A BED OF ION EXCHANGE RESIN TO REMOVE METAL ION THEREFROM AND INTERMITTENT REGENERATION OF THE BED OF ION EXCHANGE RESIN BY CONTACT WITH A REGENERATION SOLUTION THE IMPROVEMENT WHEREBY IRON CONTAINING DEPOSITS RESULT ING FROM THE PRESENCE IN SAID LIQUID OF IRON-CONTAINING CONSTITUENTS, ARE REMOVED FROM THE ION EXCHANGE RESIN A THE TIME THE SAME IS REGENERATED WHICH COMPRISES (1) AD MIXING WITH THE REGENERATION SOLUTION A COMPOUND SE LECTED FROM THE GROUP CONSISTING OF ALKALI AND ALKALI EARTL METAL SULFITES, BISULFITES, METABISULFITES AND MIXTURES THERE OF AND (2) CONTACTING THE REGENERATION SOLUTION CONTAIN ING SAID COMPOUND WITH A METAL SELECTED FROM THE GROUP CONSISTING OF ZINC, ALUMINUM, MAGNESIUM AND ALLOYS AND MIXTURES THEREOF HAVING SUBSTANTIAL SURFACE AREA PRIOR TO INTRODUCING THE SAME TO THE BED OF ION EXCHANGE RESIN FOR REGENERATION THEREOF.