Method for preparing hydrofining catalyst by waste catalyst

A technology for hydrotreating and spent catalysts, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as excessive interaction, metal environmental pollution, waste of resources, etc., and achieve easy implementation. The effect of operation, improving pore structure and improving activity

Active Publication Date: 2004-12-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Refineries generally choose to discard these spent catalysts or use them as fillers in construction and other industries, but there are two problems: 1. Because the hydrorefining catalyst generally contains molybdenum, tungsten, and cobalt in a total amount of about 20w% to 40w%. , nickel and other valuable metal oxides, such treatment will cause waste of resources
2. The discarded catalyst will pollute the environment due to the loss of the above metals, especially water resources
The main reasons for these catalysts being discarded are: 1. The pore structure and acid properties of the catalyst itself are different from those of fresh catalysts
2. Due to the accumulation of

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] First, the waste W-Ni / Al 2 o 3 Hydrofining catalyst (containing 27.86w% WO 3 , 2.39w% NiO, 6.61w% C, 6.01w% S, 0.06w% Fe, the rest is Al 2 o 3 ) to 250 mesh; then, mixed with 2.0w% WO 3 Grind, then add 20w% binder to form; Then, the catalyst is regenerated (activated) under the following conditions: the catalyst is loaded into the regeneration device, and the device is replaced with the inert gas nitrogen, and then the oxygen content is gradually reduced. Increase to 2.5v% temperature rise, constant temperature for 2h at 120°C, constant temperature for 2h at 200°C, constant temperature for 1.5h at 290°C, and constant temperature for 3h at 490°C. The number of the obtained activated catalyst is A.

Embodiment 2

[0031] Waste W-Ni / Al used in embodiment 1 2 o 3The hydrorefining catalyst powder is soaked in a cobalt nitrate solution with a total CoO content of 2.0w%, dried at 120°C and then molded by adding 20w% binder. The catalyst was then activated under the same conditions as in Example 1. The obtained catalyst was numbered B.

Embodiment 3

[0033] Waste W-Ni / Al used in embodiment 1 2 o 3 Hydrofining catalyst powder, mixed with 1.0w% MoO 3 , 0.8w% WO 3 Grinding with 0.2w% CoO, and adding 20w% binder to shape. The catalyst was then regenerated under the same conditions as in Example 1. The number of the obtained catalyst is C.

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PUM

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Abstract

A process for preparing the hydrorefining catalyst from the used one includes such steps as adding less active metal component to the used hydrorefining catalyst powder and activating (regenerating). It features that in said regeneration procedure, the metallic salt is decomposed to absorb heat and generate gas to improve the artery structure of catalyst.

Description

technical field [0001] The invention relates to a method for preparing a hydrorefining catalyst from a waste catalyst, in particular to a method for preparing a hydrorefining catalyst from a waste hydrorefining catalyst whose reaction performance cannot meet the requirements of the reaction process. Background technique [0002] Every year, a large amount of spent hydrorefining catalysts that cannot be regenerated are produced all over the world. Refineries generally choose to discard these spent catalysts or use them as fillers in construction and other industries, but there are two problems: 1. Because the hydrorefining catalyst generally contains molybdenum, tungsten, and cobalt in a total amount of about 20w% to 40w%. , nickel and other valuable metal oxides, such treatment will cause waste of resources. 2. The discarded catalyst will pollute the environment, especially water resources, due to the loss of the above metals. In view of this, many countries now prohibit t...

Claims

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Application Information

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IPC IPC(8): B01J23/85B01J37/00C10G45/08
Inventor 张喜文凌凤香孙万富赵长志
Owner CHINA PETROLEUM & CHEM CORP
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