Sulfuric Acid → Sulfuric acid--aniline (1/1)

HRID 2118935Notes

Reaction equation

HRID 2118935 reaction equation
S(O)(=O)([C:3]1[CH:8]=[CH:7][C:6]([NH2:9])=[CH:5][CH:4]=1)=O.NC1C=CC=CC=1.[S:19](=[O:23])(=[O:22])([OH:21])[OH:20]>>[S:19]([OH:23])([OH:22])(=[O:21])=[O:20].[NH2:9][C:6]1[CH:7]=[CH:8][CH:3]=[CH:4][CH:5]=1

Participants

4

Reactant 3

HCID 1118Sulfuric AcidHCID 6115AnilineHCID 8479Sulfanilic acid

Product 1

HCID 3015090Sulfuric acid--aniline (1/1)

Procedure

The classical process for making sulfanilic acid is the "baking" process wherein aniline acid and sulfuric acid are mixed together to form the solid aniline hydrogen sulfate salt (Fiat Report 1313) (1945). In one variant, a batch-type process, a layer of the solid salt several centimeters thick is spread on lead or iron trays. The loaded trays are then slowly passed through an oven or tunnel kiln and heated to above the rearrangement and water elimination temperature. The eliminated water is vented from the kiln and condensed together with any vaporized aniline. When the trays emerge, conversion to sulfanilic acid is substantially complete, the trays are emptied and the cycle is repeated by reloading the trays with additional aniline hydrogen sulfate.

Workup

  1. additionare mixed together

Sources & evidence

ORD record
ord-a134be6239944f6dbab72809934edc78
Source dataset
uspto-grants-1987_07
Patent number
US04681710

Reaction notes

Loading…