Method for recovering precious metal elements from industrial catalyst waste residues through bentonite adsorption
A precious metal element, adsorption and recovery technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve problems such as accumulation and pollution discharge, and achieve a solution Emission problems, cost savings, and the effect of simple methods
Inactive Publication Date: 2014-02-26
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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Problems solved by technology
However, for the recycling of precious metal elements in waste, there has been no effective treatment measures, and some enterprises can only pile them up. How to recycle useful precious metal elements in waste can not only recycle useful elements, reduce costs, but also can solve the problem of pollution discharge
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[0026] (1) Take 50g of 200-mesh bentonite, and dissolve the bentonite in a certain concentration of sulfuric acid solution for activation according to the order of soil, water, and acid. The amount of sulfuric acid is determined according to the solid-to-liquid ratio of 1:3; the activation reaction time is 5h, 90°C Stir continuously at high temperature; suction filter the bentonite after activation reaction, then rinse the filter cake with distilled water for 5-6 times, each rinse with about 200mL of water, and then perform suction filtration after rinsing until the pH value of the filtrate is 4-5 About; put the filter cake in an oven and dry at 105~110°C for 2 hours; after drying, the solid is ground and crushed in a mortar and then passed through a 200-mesh sieve to obtain activated clay.
[0027] (2) Weigh 10g of waste liquid sedimentation slag, and calcinate them in a muffle furnace at 350°C for 2h. Dissolve the calcined waste liquid precipitation slag in 100ml of hydrochl...
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The invention relates to a method for recovering precious metal elements from industrial catalyst waste residues through bentonite adsorption, and particularly relates to a method for recovering metal elements through adsorption. The method comprises the steps: firstly, with industrial bentonite as a raw material, acidifying to prepare activated clay; secondly, calcining catalyst waste liquid sediment residues, then, carrying out acid hydrolysis on the catalyst waste liquid sediment residues to obtain a solution, and measuring the kinds and contents of precious metal elements in the solution; thirdly, adsorbing precious metal element ions in the obtained solution by using the prepared activated clay as an adsorbent; fourthly, drying the adsorbed activated clay, grinding the dried adsorbed activated clay into powder, and directly applying the powder to a raw material for preparing a catalyst. The clay has many functions as a catalyst base material, an adhesive and the adsorbent. The adsorbed activated clay contains precious metal elements useful for the original catalyst, and can be directly applied to the production process of an industrial catalyst. The utilization ratios of the precious metal elements are increased, and meanwhile, the environment can be favorably protected.
Description
technical field [0001] The invention relates to a method for absorbing and recovering metal elements, in particular to a method for utilizing bentonite to absorb and recover precious metal elements in waste residues of industrial catalysts. Background technique [0002] With the heavy crude oil and the development of residual oil catalytic cracking process, the market demand for higher heavy oil and catalytic cracking catalyst is increasing day by day. At present, with the rapid development of my country's economy, the market demand for low-carbon olefins represented by ethylene and propylene is growing rapidly. At present, the production of ethylene and propylene is mainly through steam cracking technology. However, with the increasing demand for propylene derivatives The rapid increase of propylene production through co-production of steam thermal cracking method can no longer meet the growing demand for propylene in the domestic and foreign markets. Catalytic cracking ...
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IPC IPC(8): B01J23/36
Inventor 王国胜那晗曹文文马云龙宁志高
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY