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A Green Recycling Method for Spent Platinum Catalysts

A platinum catalyst, green technology, applied in the direction of improving process efficiency, furnace, electric furnace, etc., can solve the problems of difficult filtration in wet process, low platinum recovery rate, poor effect, etc. effect of dosage

Active Publication Date: 2019-10-15
GUIYAN RESOURCE YIMEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Difficult filtration, poor effect and low recovery rate of platinum in laboratory wet process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The green recycling method of spent platinum catalysts is carried out in sequence as follows:

[0041] A. Material pretreatment:

[0042] The exhausted propane dehydrogenation to propylene platinum catalyst was roasted in a rotary kiln at a temperature of 700°C and a roasting speed of 1,000 kg / day. After roasting, sampling and analysis showed that the platinum content was 2,550 g / ton;

[0043] The exhausted acetic acid ethanol platinum catalyst was roasted in a rotary kiln at a temperature of 500°C and a roasting speed of 3,000 kg / day. After roasting, sampling and analysis showed that the platinum content was 7,140 g / ton;

[0044] Marble: the main component is CaCO 3 , crush it to 3-6cm;

[0045] Iron block: lumpy, less than 10cm in length;

[0046] B. Ingredients and mixes:

[0047] Materials treated in step A: 1,000 kg of spent propane dehydrogenation propylene platinum catalyst, 1,000 kg of spent acetic acid platinum catalyst for ethanol production, 1,400 kg of m...

Embodiment 2

[0053] The green recycling method of spent platinum catalysts is carried out in sequence as follows:

[0054] A. Material pretreatment:

[0055] The exhausted propane dehydrogenation to propylene platinum catalyst was roasted in a rotary kiln at a temperature of 750°C and a roasting speed of 1250 kg / day. After roasting, sampling and analysis showed that the platinum content was 2560 g / ton;

[0056] The exhausted acetic acid ethanol platinum catalyst was roasted in a rotary kiln at a temperature of 550°C and a roasting speed of 4,000 kg / day. After roasting, sampling and analysis showed that the platinum content was 7,150 g / ton;

[0057] Marble: the main component is CaCO 3 , crush it to 3-6cm;

[0058] Iron block: lumpy, less than 10cm in length;

[0059] B. Ingredients and mixes:

[0060] Materials treated in step A: 1,000 kg of spent propane dehydrogenation to propylene platinum catalyst, 1,100 kg of spent acetic acid to produce ethanol platinum catalyst, 1,500 kg of marb...

Embodiment 3

[0066] The green recycling method of spent platinum catalysts is carried out in sequence as follows:

[0067] A. Material pretreatment:

[0068] The exhausted propane dehydrogenation to propylene platinum catalyst was roasted in a rotary kiln at a temperature of 800°C and a roasting speed of 1500 kg / day. After roasting, sampling and analysis showed that the platinum content was 2570 g / ton;

[0069] The exhausted acetic acid ethanol platinum catalyst was roasted in a rotary kiln at a temperature of 600°C and a roasting speed of 5,000 kg / day. After roasting, sampling and analysis showed that the platinum content was 7,160 g / ton;

[0070] Marble: the main component is CaCO 3 , crush it to 3-6cm;

[0071] Iron block: lumpy, less than 10cm in length;

[0072] B. Ingredients and mixes:

[0073] Materials treated in step A: 1,000 kg of spent propane dehydrogenation propylene platinum catalyst, 1,200 kg of spent acetic acid ethanol platinum catalyst, 1,600 kg of marble, 160 kg of ...

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Abstract

The invention relates to the field of secondary resource comprehensive utilization of spent platinum catalysts, in particular to a green recycling method of a spent platinum catalyst. The green recycling method of the spent platinum catalyst is sequentially carried out according to the following steps of A, pretreating materials; B, compounding and mixing the materials; C, melting through an electric-arc furnace; and D, preparing powder through an iron alloy. According to the green recycling method of the spent platinum catalyst provided by the invention, an applicable material range is wide,a carrier dissolving effect is good, the platinum group metal enriching times is high, the platinum group metal content in enriching residues is high, the platinum group metal recovery is high, and the equipment corrosion is low. The precious metal recovery rate is high, the material applicability is high, the usage of auxiliary materials is reduced, the energy is saved, the consumption is reduced, and the production cost is low.

Description

technical field [0001] The invention relates to the field of comprehensive utilization of secondary resources of spent platinum catalysts, in particular to a green recycling method for spent platinum catalysts. Background technique [0002] Propylene is an important chemical raw material for the production of polypropylene, propane oxides (acetone, propylene oxide, acrylic acid, etc.) and acrylonitrile, and is the second most important intermediate of petrochemical raw materials after ethylene. At present, there are three main ways to produce propylene: naphtha cracking and co-production of propylene, catalytic cracking by-product propylene and propane dehydrogenation to propylene. Propane dehydrogenation to propylene uses cheap alkanes as raw materials, platinum or chromium catalysts, and platinum catalysts are the main synthesis process for propane dehydrogenation to propylene. The platinum catalyst for propane dehydrogenation is used during the process of carbon depositi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B11/02C21C5/52
CPCC21C5/5264C22B7/001C22B11/026Y02P10/20
Inventor 贺小塘王欢李勇赵雨吴喜龙刘文
Owner GUIYAN RESOURCE YIMEN
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