Formaldehyde → Xylene formaldehyde
Reaction equation
[CH2:1]=[O:2].S(=O)(=O)(O)O.[C:8]1(C)[CH:13]=[CH:12][CH:11]=[C:10]([CH3:14])[CH:9]=1>>[C:10]1([CH3:14])[C:11]([CH3:1])=[CH:12][CH:13]=[CH:8][CH:9]=1.[CH2:1]=[O:2]Participants
4
Procedure
A reactor was charged with 106 g of m-xylene, 129 g of a 37% aqueous solution of formaldehyde (formalin) and 98% by weight sulfuric acid, and the reaction was started at 95° C. with stirring. The reaction was performed for 7 hours, and the temperature finally rose to 104° C. After the end of the reaction, the aqueous phase at the bottom (sulfuric acid phase) was separated, and the resulting oil phase was steam-distilled at 100° C. at atmospheric pressure. 107 g of a xylene/formaldehyde resin was obtained.
Workup
- customwas started at 95° C.
- customfinally rose to 104° C
- customAfter the end of the reaction
- customthe aqueous phase at the bottom (sulfuric acid phase) was separated
- distillationthe resulting oil phase was steam-distilled at 100° C. at atmospheric pressure
Sources & evidence
- ORD record
- ord-f4ede941cf0d49a989454f848adeaa0e
- Source dataset
- uspto-grants-1980_08
- Patent number
- US04218247
Reaction notes
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