3,5-Dichlorobenzoic acid → 3,5-Dichlorobenzoic acid

HRID 1657152Notes

Reaction equation

HRID 1657152 reaction equation
[Cl:1][C:2]1[CH:3]=[C:4]([CH:8]=[C:9]([Cl:11])[CH:10]=1)[C:5]([OH:7])=[O:6].[OH-].[Na+].[Cl-].[Ca+2:15].[Cl-]>O>[Ca:15].[Cl:1][C:2]1[CH:3]=[C:4]([CH:8]=[C:9]([Cl:11])[CH:10]=1)[C:5]([OH:7])=[O:6]

Participants

6

Reactant 3

HCID 58113,5-Dichlorobenzoic acidHCID 14798Sodium HydroxideHCID 5284359Calcium Chloride

Product 2

HCID 58113,5-Dichlorobenzoic acidHCID 5460341Calcium

Reagents, catalysts & solvents 1

HCID 962WaterSolvent3×

Procedure

To 3000 g of water, 191 g (1 mole) of 3,5-dichlorobenzoic acid and 40 g (1 mole) of sodium hydroxide were added and dissolved in water with stirring. An aqueous solution with 56.6 g (0.51 mole) of calcium chloride dissolved in 500 g of water was then added dropwise to the first solution under stirring, thereby obtaining a precipitate having a white color. The thus-obtained precipitate was filtered, washed with water, dewatered and then dried under reduced pressure at room temperature to obtain calcium salt of 3,5-dichlorobenzoic acid as white fine powder. The calcium content of these salts was determined by ion chromatography and was found to be 9.7 wt. %. It was hence found that calcium di(3,5-dichlorobenzoate) accounted for about 100% of these salts.

Workup

  1. additionwas then added dropwise to the first solution
  2. stirringunder stirring
  3. customobtaining a precipitate
  4. filtrationThe thus-obtained precipitate was filtered
  5. washwashed with water
  6. customdried under reduced pressure at room temperature

Sources & evidence

ORD record
ord-1bbd022ace13478491ec0d841be6f832
Source dataset
uspto-grants-1993_10
Patent number
US05256763

Reaction notes

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