Formaldehyde → 2,3-Dimethylbenzaldehyde

HRID 1863829Notes

Reaction equation

HRID 1863829 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 2L-separable flask equipped with a thermometer, reflux condenser and stirrer was charged with 240 parts of 50% formaline, 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 reaction mixture was allowed to stand to be separated into the resin phase and aqueous sulfuric acid phase. The resin phase was washed three times with water, stripped of unreacted meta-xylene for 20 minutes under the conditions of 20-30 mmHg/120-130° C., to provide a xylene-formaldehyde resin having a viscosity of 1050 centipoise (25° C.)

Workup

  1. customA 2L-separable flask equipped with a thermometer
  2. temperaturereflux condenser and stirrer
  3. customwere reacted at 84-88° C. for 4 hours
  4. customAfter termination of the reaction
  5. customto be separated into the resin phase and aqueous sulfuric acid phase
  6. washThe resin phase was washed three times with water

Sources & evidence

ORD record
ord-d5233cfa2af34e0991496c9409c3a344
Source dataset
uspto-grants-2009_12
Patent number
US07625477B2

Reaction notes

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