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Regeneration and reactivation method of heavy distillate oil hydrotreatment catalyst

A heavy distillate and hydrotreating technology, which is applied in the direction of catalyst regeneration/reactivation, catalyst activation/preparation, physical/chemical process catalysts, etc., can solve environmental pollution and other problems, reduce production costs, increase effective surface area, The effect of increasing the degree of sulfidation

Pending Publication Date: 2020-12-15
湖北中超化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the drying process of the catalyst, ammonia nitrogen compounds are released, causing certain pollution to the environment

Method used

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  • Regeneration and reactivation method of heavy distillate oil hydrotreatment catalyst
  • Regeneration and reactivation method of heavy distillate oil hydrotreatment catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A certain amount of charcoal-fired catalyst A1 was weighed, and impregnated with an aqueous solution containing phosphoric acid, tartaric acid and glycerol by ultrasonic impregnation. The molar ratio of phosphorus, tartaric acid and glycerol in the impregnation solution to the total metal atoms on the regeneration agent is 0.02:0.08:0.06:1, the power of the ultrasonic wave is 1:0W / ml, the frequency is 45kHZ, the temperature is 45°C, and the time is After impregnation, the sample was dried at room temperature for 25 minutes. The first drying temperature was 100°C and the drying time was 8 hours. The second drying temperature was 180°C and the drying time was 30 minutes to obtain catalyst A-1.

Embodiment 2

[0039] A certain amount of charcoal-fired catalyst A2 was weighed and impregnated with an aqueous solution containing phosphoric acid, malic acid and glycerol by ultrasonic impregnation. The molar ratio of phosphorus, malic acid and glycerol in the solution to the total metal atoms on the regeneration agent is 0.03:0.1:0.02:1, the ultrasonic power is 15W / ml, the frequency is 60kHZ, the temperature is 35°C, and the time is 30min After impregnation, the sample was dried at room temperature. The first drying temperature was 130°C, and the drying time was 6 hours. The second drying temperature was 160°C, and the drying time was 75 minutes to obtain catalyst A-2.

Embodiment 3

[0041]A certain amount of charcoal-fired catalyst A3 was weighed and impregnated with an aqueous solution containing phosphoric acid, citric acid and butanediol by ultrasonic impregnation. The molar ratio of phosphorus, citric acid, butanediol to the total metal atoms on the regenerant in the solution is 0.02:0.3:0.08:1, the power of the ultrasonic wave is 15W / ml, the frequency is 50kHZ, the temperature is 30°C, and the time is 30min , after impregnation, the sample was dried at room temperature, the first drying temperature was 100°C, and the drying time was 10 hours, and the second drying temperature was 170°C, and the drying time was 100 minutes to obtain catalyst A-3.

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Abstract

The invention relates to a regeneration and reactivation method of a heavy distillate oil hydrotreatment catalyst, which comprises the following steps: putting a regenerated catalyst into a solution containing an inorganic assistant and an organic chelating ligand assistant, and dipping under sound field conditions; airing an impregnated sample at room temperature; and carrying out two-step heat treatment to obtain the activated catalyst. According to the method, the effective specific surface area of the regenerated catalyst is increased, the dispersity of active components is improved, the catalyst treated and regenerated by the method is high in vulcanization degree, the number of active phases is increased, the reaction activity of the catalyst is improved, no ammonia nitrogen is discharged in the catalyst reactivation process, and the environment is not polluted.

Description

technical field [0001] The invention belongs to the field of catalyst regeneration and revival, in particular to a catalyst regeneration and revival method for heavy distillate oil hydrotreating. Background technique [0002] The hydrotreating process of petroleum fractions is one of the effective means to produce clean fuels, and its core is a hydrotreating catalyst. During long-term use, due to chemical reactions such as condensation and dehydrogenation on the surface of the catalyst, macromolecular carbon-containing compounds are formed, covering the active center of the catalyst, reducing the effective surface area of ​​the catalyst reaction, and finally making the catalyst completely inactive. By means of regeneration-resurrection, the activity of the old catalyst is restored, the disposal of the old catalyst is reduced, the operating cost of the refinery is reduced, the environment is protected, and it has certain social and economic benefits. [0003] The hydrotreati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J38/00B01J38/02B01J38/52B01J37/20B01J27/30C10G45/08
CPCB01J38/00B01J38/02B01J38/52B01J37/20B01J38/485B01J27/30C10G45/08C10G2300/202C10G2300/703
Inventor 张锋
Owner 湖北中超化工科技有限公司
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