CK (CPK forkondensat) is one of the major sources of formaldehyde and urea in the production of urea-formaldehyde resins. Production of urea-formaldehyde resin is the main area of his use, however, it is used, for example, for processing granuliruemyh fertilizer. KLF – a concentrated aqueous solution of formaldehyde stabilized with urea. Compositionally, it is a complex equilibrium mixture comprising: associated formaldehyde (in the form of monometilolkarbamida, polimetilolkarbamidov, metilenglikolya, polioksimetilenglikoley and polymers), free formaldehyde, water and small amount of methanol and other impurities. In Russia, producing various brands KLF – of CPK, CPK-70 85.
The numbers "70" and "85" in this case is the sum of the concentrations of basic substances of interest – and urea formaldehyde as the equilibrium composition of mixtures of oligomers to determine difficult. Thus, the best of its characteristics is the CK-85, manufactured by JSC "Metafrax." However, such a product originally started producing at JSC "Togliatti." Its production process was patented in 1998. CFC production technology is similar to the technology of production of formaldehyde, only the absorption of the gas are formaldegidsoderzhaschego urea solution, and no water, as in the case of formalin. The manufacturing process can be divided into three stages. 1.Stadiya spirtovozdushnoy mixture preparation, which is held in the evaporator of methanol.
2.Kataliticheskoe transformation methanol to formaldehyde, which is held in contact apparatus at a temperature of more than six degrees in the catalyst bed. 3.Stadiya absorption of formaldehyde urea solution, which is held in an absorption column. After that, the solution is desired concentration, is directed to a warehouse, and absorptive gases are sent for recycling. More detail the properties and production technologies, as well as forecast in domestic production, exports and consumption can be found in the marketing research of the Academy of IKAR industrial markets' Market of oxalic acid in Russia. "