Sodium Hydroxide → 2-Naphthol

HRID 1249646Notes

Reaction equation

HRID 1249646 reaction equation
[CH:1]1[C:10]2[C:5](=[CH:6][CH:7]=[CH:8][CH:9]=2)[CH:4]=[CH:3][C:2]=1S([O-])(=O)=O.[Na+].[OH-:16].[Na+]>O>[CH:1]1[C:10]2[C:5](=[CH:6][CH:7]=[CH:8][CH:9]=2)[CH:4]=[CH:3][C:2]=1[OH:16]

Participants

4

Reactant 2

HCID 14798Sodium Hydroxide2×HCID 23661868Sodium 2-naphthalenesulfonate2×

Product 1

HCID 86632-NaphtholYield 95.3%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent2×

Procedure

Sodium naphthalene-2-sulfonate and a hydrogenated triphenyl mixture were sent to a mixing tank 1 at a rate of 230 kg/hr and 825 kg/hr, respectively, and mixed with stirring. In a dispersing tank 2, 200 kg/hr of a 50% aqueous solution of sodium hydroxide was added to form a dispersed mixture. The dispersed mixture was dehydrated in a dehydrating tank 3, and sent to a reservoir 4. From the reservoir 4, a mixture consisting of sodium naphthalene-2-sulfonate, sodium hydroxide and the hydrogenated triphenyl mixture was sent to a reaction tank 5 at a rate of 1155 kg/hr, and continuously reacted at 310° C. in a nitrogen stream with a residence time of 6 hours. After the reaction, the reaction mixture was cooled in a heat exchanger 6, and sent to a water mixing tank 7 where it was mixed with 1200 liters/hr of water. Then, the reaction medium layer was separated in a separating tank 8, and the aqueous layer was mixed with 3.1 kg/hr of activated carbon in a mixing tank 9. Then, the activated carbon was removed in a filtration device 10. The residue was precipitated with dilute sulfuric acid in an acid precipitation tank 11, and separated by a centrifugal separator 12 to give 137.2 g (yield 95.3%) of 2-naphthol hourly.

Workup

  1. additionrespectively, and mixed
  2. customto form a dispersed mixture
  3. customcontinuously reacted at 310° C. in a nitrogen stream with a residence time of 6 hours
  4. customAfter the reaction
  5. temperaturethe reaction mixture was cooled in a heat exchanger 6
  6. customThen, the reaction medium layer was separated in a separating tank 8
  7. additionthe aqueous layer was mixed with 3.1 kg/hr of activated carbon in a mixing tank 9
  8. customThen, the activated carbon was removed in a filtration device 10
  9. customThe residue was precipitated with dilute sulfuric acid in an acid precipitation tank 11
  10. customseparated by a centrifugal separator 12

Sources & evidence

ORD record
ord-176c1f0e1abc4a439e9c5283ced916c2
Source dataset
uspto-grants-1986_12
Patent number
US04633024

Reaction notes

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