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A kind of hydrogenation catalyst activity recovery method

A hydrogenation catalyst and activity recovery technology, applied in chemical instruments and methods, physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, etc. It can avoid the rapid exothermic phenomenon, avoid metal aggregation, and promote the recovery of activity.

Active Publication Date: 2021-08-31
JIANGSU KECHUANG PETROCHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The existing regeneration method of deactivated hydrogenation catalyst cannot restore its activity to the best effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Take 200 grams of deactivated hydrogenation catalyst F-4, and soak it in the mixed organic solution of 2 grams of citric acid and 40 grams of soybean oil. Dry distillation was carried out at 180° C. for 4 hours in a nitrogen atmosphere. Carry out charcoal burning treatment again: rise to 260°C, keep the temperature for 3 hours, control the oxygen content (volume fraction) at 8%; then rise to 350°C, keep the temperature for 4 hours, control the oxygen content at 15% to 20%; then rise to 470°C, Keep the temperature constant for 6 hours, and control the oxygen content at 25% to 30%. After charcoal burning, the temperature was lowered to 130°C. The hydrogenation catalyst F-4 after the charcoal treatment was immersed in the complexing agent solution (dissolving 8 grams of citric acid in 50 grams of water to prepare the complexing agent solution), and when the temperature was raised to 180 ° C, the temperature was kept constant for 4 hours, and the To room temperature, the ...

Embodiment 2

[0046] Take 200 grams of deactivated hydrorefining catalyst F-4, and soak it in the mixed organic solution of 2.6 grams of citric acid and 40 grams of soybean oil. Dry distillation was carried out at 190° C. for 4 hours in a nitrogen atmosphere. Carry out charcoal burning treatment again: rise to 260°C, keep the temperature for 3 hours, control the oxygen content at 8%; then rise to 360°C, keep the temperature for 4 hours, control the oxygen content at 15% to 20%; then rise to 490°C, keep the temperature for 6 hours, control The oxygen content is between 25% and 30%. After charcoal burning, the temperature was lowered to 130°C. The hydrogenation catalyst F-4 after the charcoal treatment was immersed in the complexing agent solution (dissolving 7 grams of citric acid in 50 grams of water to prepare the complexing agent solution), and when the temperature was raised to 200 ° C, the temperature was kept constant for 4 hours, and the temperature was lowered. To room temperature,...

Embodiment 3

[0048] Get 200 grams of deactivated hydrorefining catalyst F-4, and soak it in the mixed organic solution of 6 grams of citric acid and 36 grams of palm oil. Dry distillation was carried out at 180° C. for 3 hours in a nitrogen atmosphere. Carry out charcoal burning treatment again: rise to 260°C, keep the temperature for 3 hours, control the oxygen content at 8%; then rise to 350°C, hold the temperature for 4 hours, control the oxygen content at 15% to 20%; then rise to 470°C, keep the temperature for 6 hours, control The oxygen content is between 25% and 30%. After charcoal burning, the temperature was lowered to 130°C. After the charcoal treatment, the hydrogenation catalyst F-4 is immersed in the complexing agent solution (dissolving 10 grams of citric acid in 50 grams of water to prepare the complexing agent solution), and when the temperature is raised to 210 ° C, the temperature is maintained for 4 hours. After cooling down to room temperature, hydrogenation catalyst ...

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Abstract

The invention discloses a method for recovering the activity of a hydrogenation catalyst, which comprises: mixing a deactivated hydrogenation catalyst with an acidic organic reagent and an organic dispersant, sequentially adopting dry distillation and charcoal burning to regenerate the deactivated hydrogenation catalyst, and then cooling down to 80°C-130°C, using a complexing agent solution for impregnation treatment; the impregnated hydrogenation catalyst is treated at 130°C-220°C for 1h-15h to obtain a hydrogenation catalyst with restored activity. The present invention organically combines the pretreatment, regeneration and activity recovery of the deactivated hydrogenation catalyst, which can restore the active metal component of the deactivated hydrogenation catalyst to the active state of the second type of active center, and can improve the degree of activity recovery and the use of the catalyst performance. At the same time, the method of the present invention can also reduce energy consumption, reduce production cost, shorten production cycle, and is especially beneficial to the activity recovery of the second type hydrogenation active center catalyst.

Description

technical field [0001] The invention relates to a method for recovering the activity of a hydrogenation catalyst, in particular to a method for recovering the activity of a hydrogenation catalyst with a second type of active center. [0002] technical background [0003] With the development of the economy and the improvement of environmental protection requirements, my country's fuel demand has greatly increased, and the fuel emission standards will gradually be in line with Europe and the United States. EU regulations stipulate that in 2009 European vehicle fuels implement the European V standard, limiting the sulfur content in oil to below 10g / g. The national V vehicle fuel quality standard implemented in my country stipulates that the sulfur content needs to be reduced to below 10 μg / g. [0004] Hydrogenation technology and supporting catalysts are the guarantee for the production of National V standard fuels, and hydrogenation catalysts are the core technology of hydrog...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/34B01J31/40
CPCB01J31/34B01J31/40
Inventor 顾齐欣孙建宜吴伟卫
Owner JIANGSU KECHUANG PETROCHEM
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