Conclusions
Data have been obtained on the corrosivity of technological media for the deployamidation of polyamide waste when a mixture of phosphoric acid hydrates is used as catalyst.
A considerably lower corrosivity of this medium has been demonstrated as compared with a medium where phosphoric acid is used as catalyst; this affords the possibility of using less scarce steels in apparatus design of the process.
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Literature cited
Corrosion and Protection of Chemical Apparatus. A Handbook Guide. [in Russian], Khimiya, Leningrad, Vol. 4 (1970), pp. 1711–178.
A. A. Speranskii et al, Third International Symposium on Man-Made Fibres, Kalinin (1981). Preprints, Vol. 2, pp. 142–145.
Additional information
Translated from Khimicheskie Volokna, No. 3, p. 50, May–June, 1987.
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Golubev, V.G., Styalova, I.K. & Bychkov, Y.N. Application of a catalyst based on a mixture of hydrates of orthophosphoric acid for anticorrosive purposes. Fibre Chem 19, 242–243 (1988). https://doi.org/10.1007/BF00543863
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DOI: https://doi.org/10.1007/BF00543863