Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Ion-exchange polymer or process of preparing
Patent
1996-02-08
1997-09-09
Zitomer, Fred
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Ion-exchange polymer or process of preparing
210670, 210674, 525360, 525364, 525366, 525384, C08F 0842
Patent
active
056657838
ABSTRACT:
A composition for regenerating spent weak cation exchange resin and a method of utilization including salts of .alpha.-hydroxy carboxylic acids or o-hydroxy benzoic acids. The following steps are employed in cyclically regenerating polycarboxylic acid cation exchange resins: (a) utilizing a charged or alkali metal salt of polycarboxylate acid cation resin to soften water; (b) regenerating the spent resin in one step with an active regenerant of the .alpha.-hydroxy carboxylic acids or o-hydroxy benzoic acids to produce spent regenerant; (c) precipitating the polyvalent hard ions in the spent regenerant with sodium or potassium carbonate to reform the active regenerant; (d) separating the precipitate; and (e) concentrating the dilute active regenerate solution to its approximate initial concentration and recovering of water for process rinses.
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Rohm and Haas Technical Bulletin Fluid Process Chemicals (IE-209-74 of Jun. 1977) describing a product termed "Amberlite DP-1.".
Cheung Henry
Grix Charles E.
Katzakian, Jr. Arthur
McGehee Donald C.
Ecotech
Ritchey James M.
Zitomer Fred
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