Regeneration method for deactivated hydrodesulfurization catalyst

A hydrodesulfurization and catalyst technology, applied in the direction of catalyst regeneration/reactivation, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of reduced catalyst selectivity, high cost, and secondary activation Long processing cycle and other issues to achieve the effect of promoting interaction and redispersion, improving activity and selectivity

Active Publication Date: 2016-06-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of method can effectively increase the number of active centers on the catalyst after the catalyst is vulcanized, thereby improving the activity of the regenerated catalyst, but it has the disadvantages of long secondary activa

Method used

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  • Regeneration method for deactivated hydrodesulfurization catalyst
  • Regeneration method for deactivated hydrodesulfurization catalyst
  • Regeneration method for deactivated hydrodesulfurization catalyst

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0019] Example 1

[0020] The UA deactivated catalyst was taken, and the catalyst was washed with a citric acid solution with a concentration of 0.5 wt%, and the amount of the pickling solution was 20 L / kg of the catalyst. After drying, impregnate the aqueous solution of KNO3 and ammonium gluconate, requiring K 2 O accounts for 2.0wt% of the total mass of the catalyst; the atomic ratio of ammonium gluconate to Mo is 0.3:1. After drying again, the temperature was raised to 260°C at a rate of 1.5°C / min for 3 hours, and O in the regeneration atmosphere was required 2 The content is 0.5wt%, the rest is N 2 , and then at a rate of 2°C / min, the temperature was raised to 430°C for 5 hours, and the regeneration atmosphere was air. After lowering to room temperature, the product was obtained, number SUA-1

Example Embodiment

[0021] Example 2

[0022] The UA deactivated catalyst was taken, and the catalyst was washed with a tartaric acid solution with a concentration of 1.3 wt%, and the amount of the acid washing solution was 10 L / kg of the catalyst. After drying, impregnated Cu(NO 3 ) 2 And the aqueous solution of ammonium gluconate requires CuO to account for 6wt% of the total mass of the catalyst; the atomic ratio of ammonium gluconate to Mo is 2:1. After drying again, the temperature was raised to 320°C at a rate of 1.5°C / min for 5 hours, and O in the regeneration atmosphere was required 2 The content is 1wt%, the rest is N 2 , and then at a rate of 2°C / min, the temperature was raised to 390°C for 7 hours, and the regeneration atmosphere was O 2 The content is 21wt%. After lowering to room temperature, the product was obtained, number SUA-2

Example Embodiment

[0034] Example 4

[0035] This example is an activity evaluation experiment of the regeneration agent. The experiment was carried out on a 100ml small hydrogenation unit under the conditions of pressure 1.6Mpa, temperature 280°C, hydrogen-oil volume ratio 300, liquid hourly space velocity 3.0h -1 The properties of the raw material oil in the activity evaluation experiment are shown in Table 2, and the evaluation results are shown in Table 3.

[0036] Table 2

[0037]

[0038] table 3

[0039]

[0040] It can be seen from Table 3 that the desulfurization activity and selectivity of the FCC gasoline selective hydrogenation catalyst regenerated by supplementary selective metal additive complexation method and its special regeneration technology are better, and the loss of octane number is reduced .

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Abstract

The invention discloses a regeneration method for a deactivated hydrodesulfurization catalyst. The method includes: (1) using an acid solution to clean a sieved deactivated hydrodesulfurization catalyst, and then performing drying treatment; (2) preparing a mixed solution containing ammonium gluconate and a metal additive, conducting saturated impregnation on the material obtain in step (1), and then performing drying, with the metal additive being one or more of Na, K, Mg, Ca, Cu and Zn elements; (3) firstly roasting the material dried in step (2) at a constant temperature of 260-320DEG C for 3-5h, with the O2 content of the roasting atmosphere being less than wt%; and then carrying out constant temperature roasting at 380-450DEG C for 4-7h, with the O2 content of the roasting atmosphere being higher than 20wt%. The method can improve the activity and selectivity of a regenerated FCC gasoline selective hydrodesulfurization catalyst.

Description

technical field [0001] The invention relates to a regeneration method of a deactivated hydrodesulfurization catalyst, in particular to a regeneration method of a deactivated FCC gasoline selective hydrodesulfurization catalyst. Background technique [0002] Hydrogenation catalyst is the core of refinery hydrogenation unit to produce clean fuel oil, which will gradually deactivate during use. After a certain period of operation, it must be regenerated to restore its activity. Therefore, regeneration technology is also an important supporting technology in modern hydrogenation process. The reasons for the deactivation of hydrogenation catalysts can be summarized as follows: the pores on the catalyst are blocked by carbon deposits; the deposition of impurities (such as iron, vanadium, silicon, etc.) in raw oil or pipelines leads to the coverage of active centers; the accumulation of active metals And the loss of additives, etc. [0003] Catalysts deactivated by carbon deposi...

Claims

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Application Information

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IPC IPC(8): B01J23/94B01J38/68
Inventor 孙进郭蓉周勇丁莉杨成敏姚运海段为宇
Owner CHINA PETROLEUM & CHEM CORP
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