Supported catalytic ozonation catalyst and its preparation method

Abstract

The invention relates to a catalytic ozonation catalyst and its preparation method. The catalyst is mainly composed of a carrier NaY molecular sieve, active metal oxides manganese oxide and titanium dioxide, and catalyst molding auxiliary agents. The carrier NaY molecular sieve supported with manganese oxide is a main catalyst agent. The content of manganese oxide in the main agent is 10.5wt%-11.5wt%. The catalyst molding auxiliary agents contain kaolin, a binder, a lubricant and a pore forming agent, wherein the weight ratio of the main agent to kaolin is 1:0.3-0.6; the weight ratio of the main agent to the binder is 1:0.5-0.9; the weight ratio of the main agent to the lubricant is 1:0.5-0.85; the weight ratio of the main agent to the pore forming agent is 1:0.02-0.04; and the content of titanium dioxide in the catalyst is 1.5wt%-3.0wt%. By using the NaY molecular sieve as the carrier, by the adoption of ion exchange and dipping methods and with the combination of supporting heterogeneous metal, the comprehensive catalytic ozonation catalyst is prepared. The catalytic ozonation catalyst can be used to process organic wastewater and has advantages of high utilization rate, high dispersiveness, obvious processing effect and long service cycle.

Description

Technical field [0001] The invention relates to a supported ozone catalytic oxidation catalyst for treating organic wastewater and a preparation method thereof. technical background [0002] In organic wastewater, aromatic hydrocarbons have one or more closed cyclic conjugated systems, which are highly delocalized and bond lengths are averaged. Although these compounds are in a highly unsaturated state, their properties are relatively stable and difficult. Addition and oxidation. At present, the treatment of aromatics-containing organic wastewater mainly includes three methods: biological, physical and chemical. Among them, the chemical method uses the oxidizing power of an oxidant to remove organic pollutants, and has the advantages of short running time, thorough treatment, strong impact resistance, and no secondary pollution. As an oxidant, ozone has convenient source, low processing cost, and relatively simple process. However, it has insufficient oxidizing ability for many...

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Problems solved by technology

However, since the catalyst is always in a liquid environment containing complex organic matter and ozone, metal oxides are easy to peel off from the carrier, and this process will take the carrier out, which not only reduces the content of active metals, but also reduces the active metal content due to the irregularity of the peeling. Block the pores of the carrier and reduce the catalytic effect

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