Stabilization of liquid paraformaldehyde

Details Stabilization of liquid paraformaldehyde Stabilization of liquid paraformaldehyde

C - Chemistry, Metallurgy

07

C

260/625.1, 260/6

C07C 43/11 (2006.01) C07C 45/86 (2006.01) C08G 2/08 (2006.01)

Patent

CA 1142968

ABSTRACT The tendency of liquid paraformaldehyde containing water and paraformaldehyde in, for example, approximately 80% to approximately 90% concentration to precipitate solid paraformaldehyde therefrom is retarded by the incorporation thereinto of an effective amount of a moderator or stabilizer selected from the group consisting of poly- acrylic acid, tartaric acid, dl-ma1ic acid, ethylenediaminetetraacetic acid, and citric acid. The prior-art stabilizers known and used for lower-concentration formaldehyde solutions of, for example, about 50% strength are not effective. Conversely, the present moderators are not effective In the lower-concentration solutions.

376717

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