High concentration boric acid solidification process
First Claim
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1. A method of solidifying a waste slurry substantially without the use of a hardener where said waste slurry comprises greater than 30 wt.% boric acid, said method comprising:
- adding a solidification agent essentially consisting of sodium metasilicate to the waste slurry in the ratio of 1 part boric acid slurry to between about 0.1 to 0.4 parts sodium metasilicate by weight and mixing.
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Abstract
A process is described for the solidification of concentrated boric acid waste solutions. The waste solution must have a boric acid concentration greater than 30% by weight. Sodium metasilicate is added to the boric acid waste solution and is mixed; a dry, hard product is formed. The process is not hindered by the presence of up to 40% dewatered bead resins.
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8 Claims
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1. A method of solidifying a waste slurry substantially without the use of a hardener where said waste slurry comprises greater than 30 wt.% boric acid, said method comprising:
adding a solidification agent essentially consisting of sodium metasilicate to the waste slurry in the ratio of 1 part boric acid slurry to between about 0.1 to 0.4 parts sodium metasilicate by weight and mixing. - View Dependent Claims (2, 3, 4)
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5. A method of solidifying a waste slurry substantially without the use of a hardener where said waste slurry comprises greater than 30 wt.% boric acid which has been previously reduced in acidity, said method comprising:
- a solidification agent essentially consisting of sodium metasilicate to the waste slurry in the ratio of 1 part boric acid slurry to between about 0.1 to 0.4 parts sodium metasilicate by weight, adding acid to the slurry/sodium metasilicate mixture to return the acid reduced slurry to about its original pH, and mixing.
- View Dependent Claims (6, 7, 8)
Specification