stable aqueous suspension of formaldehyde for anvendning in connection with such as synthetic resins, tanning and fergemnen and still for framstellning derav

摘要

Stable aqueous suspensions of formaldehyde of at least 40% by weight concentration are prepared by heating aqueous formaldehyde solutions to a temperature of from about 40 DEG C. to about 80 DEG C. in the presence of stabilizing agents, in the presence or absence of methanol, and at a pH in the range of from about 0.5 to 1.5 or about 6.0 to about 8.0, cooling the mass to a temperature of from about 10 DEG C. to about 40 DEG C., and adjusting the pH thereof to about 3.0 to 4.0.