PHYSICAL AND CHEMICAL PROPERTIES OF THE PRODUCTION TECHNOLOGY OF INDIVIDUAL UREA-FORMALDEHYDE COMPOUNDS AND MULTIFUNCTIONAL COMPOUNDS ON THE BASIS OF THOSE COMPOUNDS AND ZINC ACETATE
Keywords:
urea-formaldehyde compounds, drying process, phase composition changes, polycondensation process, spray dryerAbstract
Optimum parameters of drying process of the thin layers of low-molecular urea-formaldehyde compounds - monomethylolurea, dimethylolurea and methylene dicarene, as well as multifunctional compounds on the base of those compounds and zinc acetate, were determined. The input parameters were: pH 6.5-7.4, temperature 70-95 оС and drying process time 2-40 minutes. Output parameters: the content of methylol, methylene formaldehyde, free urea. The optimum drying parameters were: pH of solutions 6.5-7.0, temperature 70-90 оС, drying time of solutions 2-10 min. The data of the conducted studies allow us to recommend a spray dryer for the production of solid urea-formaldehyde compounds, as well as multifunctional compounds based on them and zinc acetate.
References
[1] Usmanov S., Ugaj D.P., Ermahanova F.R. Razrabotka tehnologii stimuljatorov rosta rastenij na osnove nizkomolekuljarnyh mochevino-formal'degidnyh soedinenij i acetatov dvuhvalentnyh metallov. Soobshhenie 1. Politerma rastvorimosti sistemy H2NCONHCH2OHZn(CH3COO)2-H2O / Deponir. v VINITI 1991 g., № 1218-V91., Tashkent.
[2] Usmanov S., Ermahanova F.R., Bogdanov A.V., Rudnik O.D. Sistema dimetilolmochevina – acetat cinka- voda / Deponir. v Uz NIINTI 1992 g., № 153-A92., Tashkent.
[3] Usmanov S., Ermahanova F.R., Bogdanov A.V., Rudnik O.D. Sistema metilendimochevina – acetat cinka – voda pri 25˚S / Deponir. v Uz NIINTI 1992 g., № 154-A92.
[4] Usmanov S., Ermahanova F.R., Bogdanov A.V., Isakov H., Rudnik O.D. Issledovanie tehnologii nizkomolekuljarnyh mochevino-formal'degidnyh soedinenij v raspylitel'noj sushilke / Deponir. v Uz NIINTI 1992 g., № 148-A92., Tashkent.
[5] Usmanov S., Ermahanova F.R., Bogdanov A.V., Bandurina O.Fiziko-himicheskie osnovy tehnologii nizkomolekuljarnyh mochevino-formal'degidnyh soedinenij i stimuljatorov rosta rastenij // Tezisy dokladov Mezhdunarodnoj nauchno-prakticheskoj konferencii «Nauka i tehnologija – 93», Shymkent, Kazahstan, 1993. Shymkent, 2015. P. 467.
