N,N-Dimethylaniline → HCID 68131471, compound

HRID 1077253Notes

Reaction equation

HRID 1077253 reaction equation
S(=O)=O.[CH3:4][N:5]([CH3:12])[C:6]1[CH:11]=[CH:10][CH:9]=[CH:8][CH:7]=1.[S:13](=[O:16])([OH:15])[OH:14]>O>[S:13]([OH:16])([OH:15])=[O:14].[CH3:4][N:5]([CH3:12])[C:6]1[CH:11]=[CH:10][CH:9]=[CH:8][CH:7]=1

Participants

5

Reactant 3

HCID 949N,N-DimethylanilineHCID 1100Sulfurous Acid2×HCID 1119Sulfur Dioxide

Product 1

HCID 68131471HCID 68131471, compound

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

All or substantially all of the residual gaseous dimethyl aniline is removed from the uprising gaseous mixture comprising gaseous dimethyl aniline, sulfur dioxide gas and steam in rectifying section 35 by absorption in downwardly flowing dilute aqueous sulfurous acid solution, the sulfurous acid solution being formed in rectifying section 35 due to the condensation of most if not all of the steam and the dissolution of a small amount of the sulfur dioxide gas in the resulting liquid water. The gaseous dimethyl aniline reacts with the sulfurous acid of the dilute liquid aqueous sulfurous acid solution in rectifying section 35 to form dimethyl aniline sulfite. Liquid aqueous solution containing sulfurous acid and dimethyl aniline sulfite is withdrawn at an elevated temperature of typically 155°F. from a lower portion of rectifying section 35 through line 40 and, after being indirectly cooled in cooler 41, with a cooling fluid, ordinarily water, is recycled and introduced into the upper portion of rectifying section 35 through line 42.

Workup

  1. customAll or substantially all of the residual gaseous dimethyl aniline is removed from the uprising gaseous mixture
  2. customby absorption
  3. customthe sulfurous acid solution being formed in rectifying section 35 due to the condensation of most if not all of the steam

Sources & evidence

ORD record
ord-d7b6c27620114b2ca0c1122077771fd1
Source dataset
uspto-grants-1976_05
Patent number
US03959451

Reaction notes

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