Method of Extraction of Cadmium from Waste Cadmium Calcium Phosphate Catalyst

JSC "NAVOIYAZOT" in the process of producing acetaldehyde uses the catalyst "Catalyst cadmium-calcium-phosphate (CCP-N)" TU 113-03-00209510-108-2006, at a temperature of 340-350 ° C and a pressure of 0.2- 5-0.7 atm. Its service life is 6 months, after which it must be replaced and stored. Meanwhile, it is a potential raw material for the synthesis of a new catalyst. Due to the toxicity of the component, there are practically no publications on the topic of its recycling, processing and production of CCP-N are highly specialized. However, the authors had previously managed to independently solve this problem, a necessary stage of their research was the testing of their own development in production - in JSC "NAVOIYAZOT". Purpose of the work: testing the developed method for extracting cadmium from spent cadmium-calcium-phosphate catalyst. The cadmium recovered from the spent CCP-N catalyst was sorbed on the C-100 Purolite resin. Control of the content of components: СdO, CaO, and Р2О5 was carried out on an ICP spectrometer Aligent 7500 IСP MS. Information was obtained on the yield of the product of processing the solubility of CCP-N, the efficiency of the selected precipitant of cadmium ions, and their sorption on the C-100 Purolite resin. The test result is positive. The effectiveness of the developed method for extracting cadmium was confirmed, with the registration of an application for a patent for it.

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