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Method for improving activity of distillate oil hydrogenation catalyst

A hydrogenation catalyst and a catalyst technology, which are applied in the field of regeneration and activation, can solve the problems that the regenerated catalyst does not have physical properties and acid sites, and the reaction activity does not achieve satisfactory results, and achieves good industrial application prospects, improved activity, The effect of pore size distribution concentration

Inactive Publication Date: 2014-12-31
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the regenerated catalyst does not have more suitable physical properties and acid sites, the recovery of its reactivity has not achieved satisfactory results

Method used

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  • Method for improving activity of distillate oil hydrogenation catalyst
  • Method for improving activity of distillate oil hydrogenation catalyst
  • Method for improving activity of distillate oil hydrogenation catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0027] 1000ml of diesel hydrotreating catalyst with 5.0% carbon deposition was taken during the catalyst replacement process of a certain diesel hydrotreating unit. Under an oxygen atmosphere, the temperature was raised to 450° C. at a rate of 2° C. / min and kept for 4 hours for charcoal burning. The treated sample was named S1, the carbon content of the catalyst was 0.09%, the mass fraction of NiO was 4.0%, MoO 3 The mass fraction is 21.2%.

[0028] S1 is activated with citric acid and ethylene glycol. The specific method is to take a mixed solution of citric acid and ethylene glycol and carry out equal-volume vacuum impregnation of S1, wherein the molar ratio of citric acid, ethylene glycol and the active metal molybdenum in the catalyst is 0.3:0.2:1. After impregnation, the samples were placed in a high-temperature hydrothermal treatment device for hydrothermal treatment for 6 hours, and the temperature was controlled at 130 °C. After hydrothermal treatment, it was dried ...

Embodiment 2

[0030] S1 is activated with malic acid and triethylene glycol. The specific method is to take a mixed solution of malic acid and triethylene glycol to impregnate S1 with equal volume of vacuum, wherein the molar ratio of malic acid, triethylene glycol to the active metal molybdenum in the catalyst is It is 0.3:0.2:1. After impregnation, the samples were placed in a high-temperature hydrothermal treatment device for hydrothermal treatment for 8 hours, and the temperature was controlled at 150 °C. After hydrothermal treatment, it was dried at 120° C. for 4 hours to obtain catalyst S7. S1 is also activated by lactic acid and tetraethylene glycol, tartaric acid and tributylene glycol, oxalic acid and dipropylene glycol in the same treatment method to obtain examples S8, S9, and S10.

Embodiment 3

[0032] According to the method described in the patent CN03148494.8, distillate oil hydrotreating catalyst C1 was prepared. Wherein NiO content is 4.8%, MoO 3 The content is 21%, P 2 o 5 The content is 4.5%. Catalyst C2 was obtained by treating C1 with citric acid and ethylene glycol according to the method described in Example 1.

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Abstract

The invention relates to a method for improving the activity of a distillate oil hydrogenation catalyst, and is especially suitable for activation and regeneration of carbon deposition and poisoning caused deactivated distillate oil hydrogenation catalyst. The catalyst uses VIB oxide and group VIII oxide as active metal, and is an inactivated catalyst subjected to carbon burning treatment or a fresh catalyst; and the catalyst first fully contacts with a solution containing organic acid and alcohol, and then is subjected to hydro-thermal treatment and low temperature calcination treatment. The method for improving activity of distillate oil hydrogenation catalyst gives consideration to the active phase, pore structure and acidity center of the catalyst, can obviously improve activity of the activated catalyst, and has good industrial application prospect.

Description

technical field [0001] The present invention relates to the technical field of hydrotreating catalysts, more specifically, the present invention relates to a method for regenerating and activating deactivated distillate hydrotreating catalysts or fresh hydrotreating catalysts due to carbon deposition and poisoning to improve activity. Background technique [0002] With the rapid growth of China's economy and society, the consumption of gasoline and diesel continues to increase, and the environmental problems and corresponding social problems caused by the emission of sulfur and nitrogen pollutants in the combustion process are becoming more and more serious. Implementation began in early 2017. The hydrotreating process is not only a process to directly reduce the sulfur and nitrogen content in gasoline and diesel, but also can improve the raw materials for secondary processing of hydrocracking and catalytic cracking. The existing hydrotreating technology in my country's ref...

Claims

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Application Information

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IPC IPC(8): B01J38/62B01J37/10B01J23/94B01J23/883B01J27/28B01J27/19C10G45/08
Inventor 柴永明薛超刘晨光刘宾白锐赵晋翀殷长龙柳云骐
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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