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Method for recovering platinum and rhenium from aluminum base platinum-rhenium reforming catalyst

A reforming catalyst, platinum-rhenium technology, applied in the direction of improving process efficiency, can solve the problems of metal dispersion and long process, and achieve the effect of reducing waste water discharge, short process and simple equipment

Active Publication Date: 2017-10-20
BEIJING RESEARCH INSTITUTE OF CHEMICAL ENGINEERING AND METALLURGY
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Problems solved by technology

Sasaki Cosho adopts a step-by-step combined process of wet method and fire method to treat platinum-rhenium catalyst: first immerse rhenium in alkaline solution—adsorb rhenium with anion resin—elute rhenium with hydrochloric acid—recover rhenium by sulfidation precipitation, and then treat the slag after leaching rhenium by fire method , platinum enters the precious lead, and the platinum in the precious lead is recovered by wet separation, the process is long, and the metal is dispersed

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Embodiment Construction

[0041] The technical solution of the present invention will be described in detail below in conjunction with specific embodiments.

[0042] The present invention is a method for recovering platinum and rhenium from aluminum-based platinum-rhenium reforming catalyst. A step-by-step leaching method is adopted, in which rhenium is first alkali-leached, and platinum is fully leached from the carrier, and then rhenium and platinum are respectively adsorbed and recovered by resin, including the following step:

[0043] ①First, the aluminum-based platinum-rhenium reforming catalyst is roasted at low temperature to remove carbon deposits and organic matter; the roasting temperature is 300℃~900℃, and the roasting time is 2~8h;

[0044] The carrier of the aluminum-based platinum-rhenium reforming catalyst is γ-Al 2 O 3 , The surface is attached with organic matter and carbon. The active components are metal Pt and Re, which exist in the form of finely dispersed metal crystallites in the carrie...

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Abstract

The invention relates to a method for recovering platinum and rhenium from an aluminum base platinum-rhenium reforming catalyst. A step-by-step leaching method is adopted, the rhenium is subjected to alkaline leaching at first, then carrier complete dissolution is conducted to leach out the platinum, and resin adsorption is conducted for recovering the rhenium and the platinum correspondingly. The process route comprises low-temperature roasting for removing carbon deposits, alkaline method rhenium leaching, resin adsorption for recovering the rhenium, carrier complete dissolution, R410 resin adsorption for recovering the platinum and recovering of aluminum from adsorption tail liquid in an amine-alum method. The method is simple and short in process and low in recovery cost, the large amount of aluminum in the adsorption tail liquid is recovered in the form of exsiccated ammonium alum, the platinum recovery rate reaches 99.0%, the rhenium recovery rate is greater than 94.3%, and the sponge platinum purity is greater than or equal to 99.95%.

Description

Technical field [0001] The invention belongs to the technical field of catalyst recovery, and specifically relates to a method for recovering platinum and rhenium from an aluminum-based platinum-rhenium reforming catalyst. Background technique [0002] Platinum group metals are scarce, and the content in the earth’s crust is only 0.001-0.01g / t (Pt is 0.005g / t). They are expensive. In addition to their extremely important economic value, they are also used in the development of modern technology and industry. And its important use. Platinum group metals have excellent catalytic performance. In the chemical industry, especially in the petrochemical industry, petroleum refining industry, medicine and energy industry, catalysts containing platinum group metals such as platinum and palladium are widely used. As far as platinum is concerned, it is widely used in petrochemical industry (reforming and catalytic cracking), fertilizer industry (synthetic ammonia catalyst) and the elimina...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B11/00C22B61/00C22B7/00
CPCC22B11/048C22B61/00Y02P10/20
Inventor 杨志平
Owner BEIJING RESEARCH INSTITUTE OF CHEMICAL ENGINEERING AND METALLURGY
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