Formaldehyde → 2,3-Dimethylbenzaldehyde

HRID 2077480Notes

Reaction equation

HRID 2077480 reaction equation
[CH2:1]=[O:2].[C:3]1(O)C=CC=CC=1.S(=O)(=O)(O)O.[C:15]1([CH3:22])[CH:20]=[CH:19][CH:18]=[C:17](C)[CH:16]=1>>[C:15]1([CH3:22])[CH:16]=[CH:17][CH:18]=[C:19]([CH:1]=[O:2])[C:20]=1[CH3:3]

Participants

5

Reactant 4

HCID 712FormaldehydeHCID 996PhenolHCID 1118Sulfuric AcidHCID 7929M-Xylene

Product 1

HCID 342242,3-Dimethylbenzaldehyde

Procedure

A separable flask of 2 liters in capacity, which is was equipped with a thermometer, reflux condenser and a stirrer was charged with 240 parts of 50% formalin, 55 parts of phenol, 101 parts of 98% industrial sulfuric acid and 212 parts of meta-xylene, which were reacted at 84-88° C. for 4 hours. After termination of the reaction, the system was allowed to stand to separate the resin phase from the aqueous sulfuric acid phase. The resin phase was washed with water three times and removed of the unreacted meta-xylene for 20 minutes under the conditions of 20-30 mm Hg/120-130° C. to provide a xylene-formaldehyde resin (1) having viscosity of 1050 centipoise (25° C.).

Workup

  1. customA separable flask of 2 liters in capacity, which is was equipped with a thermometer
  2. temperaturereflux condenser and a stirrer
  3. customwere reacted at 84-88° C. for 4 hours
  4. customAfter termination of the reaction
  5. customto separate the resin phase from the aqueous sulfuric acid phase
  6. washThe resin phase was washed with water three times
  7. customremoved of the unreacted meta-xylene for 20 minutes under the conditions of 20-30 mm Hg/120-130° C.

Sources & evidence

ORD record
ord-f295779eb43e4d18b3f05ec9bb6da9d3
Source dataset
uspto-grants-2011_04
Patent number
US07928152B2

Reaction notes

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