Carbamide-formaldehyde concentrate (CFC) TY 2181-032-00203803-2003
CFC is used as a semi-product for the production of urea formaldehyde, melamine-carbamide-formaldehyde resins and for carbamide treatment to resist slumping; it is used in woodworking and furniture industry for production of plywood, chipboards, etc.
Production: The CFC production method bases on catalytic oxidation of methanol to formaldehyde along with subsequent absorption of formaldehyde with carbamide solution.
Basic physical and chemical features:
| Appearance | Homogenous viscous liquid |
| Mass share of total formaldehyde, % | 58,0 ± 2,0 |
| Mass share of carbamide, % | 23,0 ± 2,0 |
| Mass share of methanol, %, not exceeding | 0,3 |
| Concentration of hydrogen ions, pH | 7,0 — 9,0 |
| Buffer capacity, ml, not exceeding | 20+ |
| Mass share of dry residue during calcinations (ash content), %, not exceeding | 0,5 |
| Mass share of methylol groups, %, at least | 25,0 |
| Funnel viscosity at temperature (20±05) °С, by flow meter VZ-246 (nozzle 4 mm), s, not exceeding | 80 |
Terms and periods of storage: |
|
| Storage temperature, °С | (+10 +30) |
| Warranty storage period (since the date of fabrication) | 6 months |
At low temperatures (down to -40, °С) CFC turns into paste (it gets sluggish). When it is heated in accordance with the requirements of specifications, it returns to the initial state.
Transportation:
It is supplied in rail cars (model 15-1487-01).
Consumers of these products get considerable benefits.
The use of CFC in the technology of carbamide-formaldehyde resins makes it possible to:
- Withdraw the product concentration stage from the technological process and reduce production expenditures;
- Resolve the problem of disposal of formaldehyde containing waste waters, methanol and formaldehyde containing gas discharges;
- Reduce expenditures for transportation by 40%, as CFC will be required by 1.6-2.2 times lass then formalin;
- Reduce required carbamide by 25%;
- Provide synthesis of low-toxic highly water-resistant resins with the spatial structure of polymers;
- Ensure high quality of obtained carbamide-formaldehyde resins (with methanol content by 0.2%), fabricate particle boards of E1 emission class;
- Reduce methanol discharges by several times in the process of pressing.