Formaldehyde → Benzenemethanesulfonic acid, .alpha.-hydroxy-, sodium salt (1:1)

Participants

Reaction Steps

No. 1 A one-liter three necked flask provided with a stirrer and a reflux condenser was charged with 94g of phenol, 81g of 37% formalin, 126g of sodium sulfite and 300g of water. Reaction was conducted for 5 hours under heating by a boiling water bath to obtain a water solution of sodium hydroxybenzylsulfonate. The concentration of the solution thus obtained was about 40% by weight, and the pH value thereof was 11.5. This solution was used as a water-reducing additive designated as A.

Provenance & Evidence