Preparation of ureaform

Details Preparation of ureaform Preparation of ureaform

C - Chemistry, Metallurgy

05

C

71/23, 71/43

C05C 9/02 (2006.01) C05C 1/02 (2006.01)

Patent

CA 1089247

Abstract of the Disclosure Preparation of ureaform granules. A concentrated aqueous solution of a urea-formaldehyde condensate is mixed with a catalyst which at normal temperature effects virtually no acid condensation, but a elevated temperature releases sufficient strong acid to effect the acid condensation in a few seconds. The mixture of solution and catalyst is sprayed over solid ureaform particles maintained in spaced interrelationship and at such a temperature that the catalyst is decomposed and effects acid condensation, whereby the sprayed particles are coated with a layer of ureaform and dried.

281694

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