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A method of preparing a C4 isomerization catalyst by utilizing a waste palladium-based catalyst

A catalyst, isomerization technology, applied in catalyst regeneration/reactivation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as increasing the production cost of platinum-based catalysts

Inactive Publication Date: 2017-06-20
ANHUI HAIDE PETROCHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the current high price of heavy metals has greatly increased the production cost of platinum-based catalysts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Water washing: add the waste platinum-based catalyst to 40-50°C water, keep stirring for 1 hour, then add detergent builder, mix well and continue heating to reflux state, keep stirring for 15 minutes, then stand at room temperature for 2 hours, and finally heat to reflux again Stir for 15 minutes in a state of heat preservation. After cooling to room temperature, let it stand for stratification. After removing the upper oil phase and suspended matter, filter it with filter paper, and rinse the obtained filter residue with water twice;

[0025] (2) Drying and calcining: place the washed waste platinum-based catalyst in an oven at 75-80°C for drying, transfer it to a calciner after the water content is lower than 1%, and calcinate at 450-500°C for 3 hours;

[0026] (3) Pickling: Add the calcined spent platinum-based catalyst into 5 times the mass concentration of 20% hydrochloric acid solution in parts by weight, fully mix and let stand for 1 hour, then heat to reflux...

Embodiment 2

[0032] (1) Water washing: add the waste platinum-based catalyst to 40-50°C water, keep stirring for 1 hour, then add detergent builder, mix well and continue heating to reflux state, keep stirring for 15 minutes, then stand at room temperature for 2 hours, and finally heat to reflux again Stir for 15 minutes in a state of heat preservation. After cooling to room temperature, let it stand for stratification. After removing the upper oil phase and suspended matter, filter it with filter paper, and rinse the obtained filter residue with water twice;

[0033] (2) Drying and calcining: place the washed waste platinum-based catalyst in an oven at 75-80°C for drying, transfer it to a calciner after the water content is lower than 1%, and calcinate at 450-500°C for 3 hours;

[0034] (3) Pickling: Add the calcined spent platinum-based catalyst into 5 times the mass concentration of 20% hydrochloric acid solution in parts by weight, fully mix and let stand for 1 hour, then heat to reflux...

Embodiment 3

[0050] The new platinum-based catalysts made by equivalent embodiment 1, embodiment 2, comparative example 1 and comparative example 2 are used for equivalent carbon four isomerization to produce light aromatics, and the selective catalytic efficiency of the new platinum-based catalysts is measured And by the recovery rate of platinum ion by described preparation method, the result is shown in table 1.

[0051] Catalytic efficiency and recovery of platinum ions of the new platinum-based catalysts prepared in Table 1

[0052] project Example 1 Example 2 Comparative example 1 Comparative example 2 Selected Catalytic Efficiency / % 92.93 93.41 80.24 65.32 Platinum ion recovery / % 99.52 99.58 76.17 52.06

[0053] It is found through testing that the selective catalytic efficiency of the prepared catalysts in Examples 1 and 2 reaches over 90%, and the recovery rate of platinum ions in the preparation process of the new platinum-based catalyst rea...

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Abstract

A method of preparing a C4 isomerization catalyst by utilizing a waste palladium-based catalyst is disclosed and relates to the technical field of petroleum chemical engineering. The method includes steps of (1) water washing, (2) drying and calcinating, (3) acid washing and (4) regeneration. The method achieves regeneration and utilization of the waste palladium-based catalyst, and prepares the catalyst for C4 isomerization to prepare light aromatic hydrocarbons. On the premise of ensuring the catalytic efficiency to be 90% or above, the palladium-based catalyst purchasing cost is effectively reduced and influences of the waste palladium-based catalyst on the environment are relieved.

Description

[0001] Technical field: [0002] The invention relates to the technical field of petrochemical industry, in particular to a method for preparing a C4 isomerization catalyst by utilizing a waste platinum-based catalyst. [0003] Background technique: [0004] C4 fraction is a mixture of various hydrocarbons containing four carbon atoms, mainly derived from refinery gas produced during petroleum refining and by-products of petroleum cracking to produce ethylene, and is a basic chemical raw material with potential value. For the utilization of C4 fractions, one of them is to produce heavy aromatics and light aromatics by C4 isomerization, and the economic benefit of light aromatics is higher than that of heavy aromatics, while the yield of light aromatics produced by previous methods is low. Therefore, it is necessary to produce light aromatics by selective isomerization using a catalyst. [0005] Platinum-based catalysts are commonly used catalysts for C4 isomerization, and usua...

Claims

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Application Information

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IPC IPC(8): B01J38/48B01J38/60B01J23/42B01J38/02B01J23/96
Inventor 黄帮义
Owner ANHUI HAIDE PETROCHEM
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