MANUFACTURE OF UREA-FORMALDEHYDE CONCENTRATES USING A GAS-LIQUID TECHNOLOGY

被引：1
|
作者：
FRONTINI, PM [1 ]
BORRAJO, J [1 ]
WILLIAMS, RJJ [1 ]
机构：
[1] UNIV MAR DEL PLATA,NATL RES COUNCIL,INST MAT SCI & TECHNOL,JUAN B JUSTO 4302,RA-7600 MAR DEL PLATA,ARGENTINA
来源：
POLYMER ENGINEERING AND SCIENCE | 1984年 / 24卷 / 16期
关键词：
CHEMICAL EQUIPMENT - Design - FLOW OF FLUIDS - Packed Beds - FORMALDEHYDE - UREA - VAPORS;
D O I：
10.1002/pen.760241606
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
The performance of a laboratory packed-column for the manufacture of urea-formaldehyde (UF) concentrates is analyzed. Gaseous formaldehyde was generated by the thermal decomposition of paraformaldehyde in a carrier nitrogen stream. The UF solution was continuously recirculated through a glass column filled with Raschig rings. No pH control was necessary when the operation was started using a solution with a F/U molar ratio higher than 3. 5 to 4. Otherwise, insoluble resins appeared during the operation. The formaldehyde absorption rate was controlled by the gas phase resistance. The vapor composition in equilibrium with a typical UF concentrate is provided as a function of temperature.
引用
收藏
页码：1245 / 1248
页数：4
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