External presulfurization method of hydrogenation catalyst

A technology of hydrogenation catalyst and external pre-sulfiding, which is applied in chemical instruments and methods, catalyst activation/preparation, physical/chemical process catalysts, etc. The effect of releasing heat, increasing sulfur holding rate, and increasing reaction action

Active Publication Date: 2016-04-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN1400056A Coat the pre-sulfurized catalyst containing sulfidation agent with oxygen-containing organic matter containing at least 16 carbon atoms, treat it above 175°C for a period of time, and then activate it with hydrogen to reduce the self-heating problem of the catalyst, but it cannot completely solve the sulfidation state The self-heating problem of the catalyst, and the storage, transportation and loading of the catalyst still have certain problems
This method can improve sulfur holding rate and catalyst activity, but further improvement is needed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0048] The catalyst in the oxidation state of Comparative Example 1 was taken, and the presulfurization treatment outside the equipment was carried out according to the following steps.

[0049] (1) The hydrogenation catalyst in the oxidized state is pretreated with sorbitol. The molar ratio of n-butanol to the active metal atoms in the catalyst is 0.8:1. The n-butanol is made into an aqueous solution with a mass concentration of 30%, and then impregnated Into the oxidized catalyst, dry at 120°C to remove moisture, and then perform reduction pretreatment, the temperature of reduction pretreatment is 220°C, and the time is 1 hour;

[0050] (2) The material after reduction pretreatment is introduced into a mixture containing a vulcanizing agent. The vulcanizing agent is sulfur, and the sulfur is dispersed in the catalytic cracking diesel oil. The amount of solvent is 15% of the weight of the catalyst in the oxidation state, and the amount of sulfur is the theoretical sulfur requi...

Embodiment 3

[0052] The catalyst in the oxidation state of Comparative Example 1 was taken, and the presulfurization treatment outside the equipment was carried out according to the following steps.

[0053] (1) The oxidized state hydrogenation catalyst is pretreated with diethylene glycol for reduction. The amount of diethylene glycol is such that the molar ratio of active metal atoms in the catalyst is 2:1. Diethylene glycol is formulated into an aqueous solution with a mass concentration of 15%, and then Immerse in the oxidized catalyst, dry at 120°C to remove moisture, and then perform reduction pretreatment, the temperature of reduction pretreatment is 180°C, and the time is 2 hours;

[0054] (2) The material after reduction pretreatment is introduced into a mixture containing a vulcanizing agent. The vulcanizing agent is sulfur, and the sulfur is dispersed in soybean oil. The amount of soybean oil is 20% of the weight of the catalyst in the oxidation state, and the amount of sulfur is...

Embodiment 4

[0056] The catalyst in the oxidation state of Comparative Example 1 was taken, and the same procedure as that of Example 1 was used to carry out pre-sulfurization treatment outside the equipment. Just replace n-butanol with ethanol in step (1). Finally, the external presulfided catalyst A-4 was obtained.

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PUM

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Abstract

The invention relates to an off-site presulfurization method of a hydrogenation catalyst, which comprises the following steps that (1) the oxidation-state hydrogenation catalyst is subjected to reduction pretreatment by alcohol; and (2) a material after the reduction pretreatment is led in a mixture containing a vulcanizing agent, and then heat treatment is performed. Compared with the prior art, the method can increase a sulfur holding rate of the off-site presulfurization catalyst, and improve the usability of the catalyst.

Description

technical field [0001] The invention relates to a method for presulfurization outside a hydrogenation catalyst. Background technique [0002] Hydrogenation catalysts such as hydrorefining, hydrotreating, and hydrocracking generally contain refractory oxides such as alumina, silica-alumina, and molecular sieves as carriers, and one or more of molybdenum, tungsten, cobalt, and nickel as active metal groups. Sometimes, the catalyst can also contain auxiliary components such as phosphorus, silicon, fluorine, titanium, zirconium, and boron. Generally, the metal component of the catalyst obtained in the production process exists in an oxidized state, while in the hydrogenation reaction process, the active metal component of the catalyst is in a sulfide state (the metal exists in the form of sulfide: Co 9 S 8 、MoS 2 、Ni 3 S 2 、WS 2 etc.) have higher reactivity, therefore, the catalyst needs to be pre-sulfided into a sulfurized state before use. Therefore, the effect of presu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J37/20B01J23/883
Inventor 方向晨高玉兰王继锋徐黎明彭绍忠
Owner CHINA PETROLEUM & CHEM CORP
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