Investigation of Gas Concentrations Emitted From Chemical Reagents Used in Polyurethane Production
DOI:
https://doi.org/10.51699/cjmbfr57Keywords:
Polyurethane, Recycled Polyurethane, Diisocyanate, Polyether Polyol, Chain Extender, Polycondensation, Gaseous Emissions, Volatile Organic Compounds (VOCs), Isocyanate Vapors, Gas Analyzer, ANT-3M, GC-8000, Workplace Air, Environmental Safety, Gas Neutralization, Gas Purification System, Hazard ClassificationAbstract
This study investigates the composition and concentration of gases generated during the heating, polycondensation, curing, crystallization, and recycling processes of liquid diisocyanates, polyether polyols, and chain extenders used in polyurethane synthesis within the temperature range of 60–120 °C. The polycondensation kinetics and thermochemical transformations of both virgin and recycled polyurethane formulations were examined. The concentrations of volatile organic compounds (VOCs), isocyanate vapors, and other gaseous emissions released into the workplace atmosphere during the technological process were determined using ANT-3M and GC-8000 gas analyzers. The measured gas concentrations were compared with the maximum permissible concentrations (MPCs) established for workplace air, and their hazard classes were determined in accordance with GOST 12.1.007–76. Based on the experimental findings, an innovative technological approach and a multi-stage gas purification system were developed to capture, neutralize, and minimize the release of hazardous gaseous emissions into the atmosphere during polyurethane synthesis and recycling. The proposed technology is expected to improve the environmental safety of polyurethane production, ensure compliance of workplace air quality with occupational safety standards, reduce harmful emissions, and significantly enhance the environmental and technological efficiency of polyurethane manufacturing processes.
References
R. Zayniyeva, “Neftni qazib olish jarayonida asfaltsmolaparafin to‘plami hamda qatlamining neft quduqlari atrofida to‘planishi va uni qayta ishlash usullari,” Green Economy and Development, vol. 2, no. 1, Art. no. 664862, 2024.
A. Shodiyev, B. Mukhiddinov, and S. Kiyomov, “Effect of change of polyethropoliol amount on the physical-mechanical properties of thermoreactive polyurethane,” Universum: Technical Sciences, no. 10 (103), 2022.
F. M. de Souza, P. K. Kahol, and R. K. Gupta, “Introduction to polyurethane chemistry,” in Polyurethane Chemistry: Renewable Polyols and Isocyanates. Washington, DC, USA: American Chemical Society, 2021, pp. 1–24.
A. Das and P. Mahanwar, “A brief discussion on advances in polyurethane applications,” Advanced Industrial and Engineering Polymer Research, vol. 3, no. 3, pp. 93–101, 2020.
J. Brzeska and A. Piotrowska-Kirschling, “A brief introduction to the polyurethanes according to the principles of green chemistry,” Processes, vol. 9, no. 11, Art. no. 1929, 2021.
I. N. Bakirova and T. A. Mineeva, “Sintez termoplastichnogo poliuretana s ispolzovaniem v kachestve udlinitelya tsepi aromaticheskogo diola i razrabotka na ego osnove kleevykh kompozitsiy,” Izvestiya Vysshikh Uchebnykh Zavedeniy. Khimiya i Khimicheskaya Tekhnologiya, vol. 67, no. 11, pp. 106–113, 2024.
E. V. Stukan et al., “Katalizatory dlya proizvodstva poliuretanov,” NefteGazoKhimiya, no. 2, pp. 53–56, 2024.
O. L. Figovskiy, O. I. Bolshakov, and I. N. Vikhareva, Neizotsianatnye Poliuretany: Ekologichnye Resheniya. Moscow, Russia, 2023.
E. M. Zakharyan and A. L. Maksimov, “Piroliz poliuretanov. Osobennosti protsessa i sostav produktov reaktsii (obzor),” Zhurnal Prikladnoy Khimii, vol. 95, no. 2, pp. 164–230, 2022.
D. Zhang et al., “Multi-dimensional laboratory characterization: VOCs emission and evolution in warm-mix synchronous rejuvenated (WMA-SR) asphalt pavement throughout construction stages,” Environmental Pollution, Art. no. 128536, 2026.
G. Oertel, Ed., Polyurethane Handbook, 2nd ed. Munich, Germany: Hanser Publishers, 1994.
D. Randall and S. Lee, The Polyurethanes Book. Chichester, U.K.: John Wiley & Sons, 2002.
M. Szycher, Szycher’s Handbook of Polyurethanes, 2nd ed. Boca Raton, FL, USA: CRC Press, 2012.
Z. S. Petrović, “Polyurethanes from vegetable oils,” Polymer Reviews, vol. 48, no. 1, pp. 109–155, 2008.
H. Ulrich, Chemistry and Technology of Isocyanates. Chichester, U.K.: John Wiley & Sons, 1996.
