If MTO spent catalysts cannot be recycled, do they belong to hazardous waste or ordinary industrial solid waste?
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If MTO spent catalysts cannot be recycled, do they belong to hazardous waste or ordinary industrial solid waste?
MTO catalysts are primarily SAPO-34 (silica-alumina phosphate molecular sieves), which are composed of four elements: Si, Al, P, and O. Waste SAPO-34 should be recovered by **authorized, specialized catalyst treatment facilities; you can consult the environmental protection agency for more information. Furthermore, aluminum silicate phosphate molecular sieves are classified as hazardous waste, with the waste code HW50. Remember: never attempt to dispose of them on your own or entrust them to unqualified hazardous waste treatment facilities.
It is mainly used in the production of olefins from methanol. The elements comprising the silicoaluminate phosphate molecular sieve do not possess any harmful properties, and the process of converting methanol into olefins does not introduce any hazardous substances. If it falls under HW50, which category or description related to waste generation processes applies to it? Catalytic cracking of petroleum products?
Specifically, you can consult the local environmental protection agency by referring to the published **List of Hazardous Wastes**, in light of the production process.
The \"General Principles for the Identification of Hazardous Wastes\" and the \"Technical Specifications for the Identification of Hazardous Wastes\" can also be referred to. Disposing of HW that is not fully understood without authorization carries risks.
Our company specializes in the identification of hazardous waste. Several coal chemical enterprises have consulted us; according to the environmental impact assessment, these wastes are classified as HW50. However, after analyzing their production processes, we found that they do not meet the criteria for HW50. Therefore, it is possible to conduct a hazard waste identification using the standards HJ298 and GB5085.1–7.
Our company specializes in the identification of hazardous waste. Several coal chemical enterprises have consulted us; according to the environmental impact assessment, these wastes are classified as HW50. However, after analyzing their production processes, we found that they do not meet the criteria for HW50. Therefore, it is possible to conduct a hazard waste identification using the standards HJ298 and GB5085.1–7. The environmental protection agency has little understanding of these matters and generally manages things in accordance with environmental impact assessments; however, when it comes to reducing hazardous waste generated by enterprises, the associated management costs pose a problem.
““The environmental impact assessment has been classified as HW50,” “several coal chemical enterprises” – don’t you think that already speaks volumes? This is not the environmental assessment conclusion issued by an environmental expert from a certain location regarding a particular MTO project, nor is it the claim that SAPO-34 is not a hazardous waste made by the owner of that MTO project in the environmental impact assessment report. There are already dozens of MTO plants across the country, and it is the consensus among all parties that SAPO-34 should be classified as HW50 – so what is the point of continuing to challenge this?
According to the list of hazardous waste, catalysts contaminated with toxic substances are classified as hazardous waste. Even though the elements of aluminum silicophosphate molecular sieves do not possess harmful properties, the methanol solution used in the process of producing olefins from methanol is toxic. Unless you can send the catalyst contaminated with toxic substances to a qualified facility for treatment, or clean it yourself (just like trying to whiten coal blocks – complete nonsense!) ), the catalyst is treated as ordinary solid waste. Moreover, the cleaning waste liquid remains hazardous waste.
This post was last edited by sdwfsgyykai on 2021-1-13 08:04. Undoubtedly, it is hazardous waste classified as HW50; the specific details can be found in the environmental impact assessment documents. The assessment will provide relevant information. If there is no such assessment, apply to the local environmental protection authorities as soon as possible to obtain it. I specialize in the disposal of waste catalysts, and feel free to contact me for any technical or other inquiries