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Method for efficiently recovering platinum group noble metal from platinum-containing organic alcohol waste liquid

A technology for organic alcohols and precious metals, applied in the field of efficient recovery of platinum group precious metals, can solve the problems of danger, low platinum recovery rate, poor product purity, etc., and achieve the effects of high production safety, improved purity and less environmental pollution

Active Publication Date: 2021-08-13
SINOSTEEL ANHUI TIANYUAN TECH
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  • Description
  • Claims
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for efficiently recovering platinum-group precious metals from platinum-containing organic alcohol waste liquid, so as to solve the problems of complex process, low platinum recovery rate, high energy consumption, unfriendly environment, poor product purity or issues such as danger

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  • Method for efficiently recovering platinum group noble metal from platinum-containing organic alcohol waste liquid

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Embodiment 1

[0022] This embodiment adopts a method for efficiently recovering platinum group noble metals from platinum-containing organic alcohol waste liquid in the above-mentioned present invention; platinum-containing organic alcohol waste liquid sample 1 contains metal ions Pt, Ni, Fe, Mg, and is detected by ICP. The platinum ion concentration is 107ppm, the organic alcohol liquid is a complex of ethylene glycol and water, and the pH is 10.4. After the initial waste liquid is suction filtered to remove the waste residue, take 5L of the filtrate, and under continuous and thorough stirring, add 10wt% sulfuric acid to adjust the pH to 1.5, then add 7g of sodium citrate and 4g of ascorbic acid, and stir the reaction at 80°C 12h. After the reaction was completed, it was filtered, and the black precipitate was washed and roasted to obtain 0.459 g of simple platinum. The calculated recovery rate was 93.6%.

[0023] In terms of the purity of the noble metal obtained, the detected impurity c...

Embodiment 2

[0028] This embodiment adopts a method for efficiently recovering platinum group noble metals from platinum-containing organic alcohol waste liquid in the above-mentioned present invention; platinum-containing organic alcohol waste liquid sample 2 contains metal ions Pt, Pd, Zn, Fe, Ca, Mg, According to ICP detection, the platinum ion concentration is 40ppm, the palladium ion concentration is 53ppm, the organic alcohol liquid is a complex of methanol and ethanol, and the pH is 3.1. After the initial waste liquid is suction filtered to remove the waste residue, take 5L of the filtrate, and under continuous and thorough stirring, add 10wt% hydrochloric acid to adjust the pH to 1.0, then add 35g of ascorbic acid and 11g of citric acid, and stir for 80 hours at 30°C . After the reaction was completed, it was filtered, and the black precipitate was washed and roasted to obtain 0.371 g of mixed noble metal elemental substance of platinum and palladium. The recovery rate was calculat...

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Abstract

The invention discloses a method for efficiently recovering platinum group noble metal from platinum-containing organic alcohol waste liquid, and relates to the technical field of organic chemistry. The method aims to solve the problems of complex process, low platinum recovery rate, high energy consumption, environmental unfriendliness, poor product purity or danger and the like in the conventional method. The method comprises the following steps: filtering the platinum-containing organic alcohol waste liquid, filtering out filter residues to obtain clear filtrate, and adjusting the pH value of the clear filtrate to 1.0-2.0 by using acid liquor or alkali liquor; under continuous stirring, adding excessive weak reducing agents into the platinum-containing organic alcohol waste liquid for reaction, wherein the weak reducing agents are reducing agents with reduction potential capable of reducing metal activity in platinum and metal after platinum but not enough to reduce metal before H+ potential under the acidic condition that the pH is 1.0-2.0; and filtering the filtrate after the reaction to obtain filter residues and tail liquid, and cleaning and roasting the filter residues to obtain powdery platinum group noble metal. The method has the simple recovery process, short flow, high yield, high purity and low cost, and has great industrial application value.

Description

technical field [0001] The invention relates to the technical field of organic chemistry, in particular to a method for efficiently recovering platinum group precious metals from platinum-containing organic alcohol waste liquid. Background technique [0002] Noble metal catalysts have high catalytic activity and can catalyze selective oxidation reactions, hydrogenation / dehydrogenation reactions, and isomerization reactions of various products. They are used in various industrial applications such as fine chemical manufacturing, aerospace, and electrochemical devices. have wide and important applications. However, since precious metal catalysts contain a large amount of precious metals such as platinum and palladium, the price is high, so the efficient recovery of platinum group metals in spent catalysts from industrial applications has high economic value, which will help companies greatly reduce production costs and improve Product profit. In industrial production, platin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B11/00C22B7/00
CPCC22B11/048C22B7/007C22B7/008C22B7/006
Inventor 邓翔裴晓东骆艳华
Owner SINOSTEEL ANHUI TIANYUAN TECH
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