Boric Acid → Calcium

HRID 1982101Notes

Reaction equation

HRID 1982101 reaction equation
[B:1]([OH:4])([OH:3])[OH:2].[OH-].[Ca+2:6].[OH-]>>[Ca:6].[B:1]([O-:4])([O-:3])[O-:2].[B:1]([O-:4])([O-:3])[O-:2].[B:1]([O-:4])([O-:3])[O-:2].[B:1]([O-:4])([O-:3])[O-:2].[Ca+2:6].[Ca+2:6].[Ca+2:6].[Ca+2:6].[Ca+2:6].[Ca+2:6]

Participants

4

Reactant 2

HCID 7628Boric AcidHCID 6093208Calcium Hydroxide

Product 2

HCID 5460341CalciumHCID 22238541Calcium tetra borate

Procedure

Referring now to the drawing, which despicts the preferred process of this invention, the boric acid liquid wastes, commonly referred to as "evaporator bottoms", generated by a typical pressure water reactor (PWR) are evaporated and concentrated to about a 10 weight percent boric acid solution. The steam resulting from this evaporation process is directed to a vapor clean-up system for ultimate discharge or recycling. The boric acid solution is neutralized with a stoichiometric amount of calcium hydroxide or a similar calcium compound to yield a precipitate of insoluble calcium tetraborate according to the following equation:

Workup

  1. customthe boric acid liquid wastes, commonly referred to as "evaporator bottoms"
  2. customgenerated by a typical pressure water reactor
  3. custom(PWR) are evaporated
  4. concentrationconcentrated to about a 10 weight percent boric acid solution
  5. customThe steam resulting from this evaporation process

Sources & evidence

ORD record
ord-423d754e01994955a6f5bff2402fd6de
Source dataset
uspto-grants-1986_06
Patent number
US04595528

Reaction notes

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