INVESTIGADORES
FRONTINI patricia Maria
artículos
Título:
Manufacture of Urea-Formaldehyde Concentrates Using a Gas-Liquid Technology
Autor/es:
J. BORRAJO; .R. WILLIAMS; P.M. FRONTINI
Revista:
POLYMER ENGINEERING AND SCIENCE
Editorial:
JOHN WILEY & SONS INC
Referencias:
Lugar: New York; Año: 1984 p. 1246 - 1256
ISSN:
0032-3888
Resumen:
The performance of a laboratory packed-column for themanufacture of urea-formaldehyde (UF) concentrates is analyzed.Gaseous formaldehyde was generated by the thermaldecomposition of paraformaldehyde in a carrier nitrogenstream. The UF solution was continuously recirculated througha glass column filled with Raschig rings. No pH control wasnecessary when the operation was started using a solution witha F/U molar ratio higher than 3.5 to 4. Otherwise, insolubleresins appeared during the operation. The formaldehyde absorptionrate was controlled by the gas phase resistance. Thevapor composition in equilibrium with a typical UF concentrateis provided as a function of temperature.
