A hydrogenation catalyst activity recovery and sulfidation method

A hydrogenation catalyst and activity recovery technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of low degree of improvement of regenerated catalyst activity, shorten the production cycle and ensure continuity , the effect of improving pore volume and its activity

Active Publication Date: 2019-10-29
上海竣铭化工工程设计有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

[0013] In view of this, the present invention aims to propose a hydrogenation catalyst activity recovery and sulfuration method, especially for the second type of active center hydrogenation catalyst, to solve the problem of low activity improvement of the regenerated catalyst in the prior art

Method used

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  • A hydrogenation catalyst activity recovery and sulfidation method
  • A hydrogenation catalyst activity recovery and sulfidation method
  • A hydrogenation catalyst activity recovery and sulfidation method

Examples

Experimental program
Comparison scheme
Effect test

experiment example 1

[0102] During the experiment of the present invention, the inventors unexpectedly found that before the regeneration treatment of the catalyst, the use of acidic organic reagents and carboxylic acid esters for mixing and compounding to impregnate the deactivated catalyst not only redispersed the agglomerated active metal Open, and can effectively remove hydrocarbons and basic macromolecular groups remaining in the micropores of the hydrogenation catalyst, thereby increasing the pore volume of the catalyst.

[0103] The specific experimental process is as follows: the deactivated hydrogenation catalyst F-4 of the same batch is grouped, and the deactivated catalyst mass of each group is 1kg; the untreated deactivated catalyst is used as the comparison group 1; The catalyst is comparative group 2; for the rest of the catalyst groups, different impregnating agents are used to impregnate the deactivated catalysts, and then the catalysts are regenerated by dry distillation and charco...

experiment example 2

[0111] During the experiment of the present invention, the inventors found that the acidic organic reagent and carboxylate were mixed and compounded to impregnate the deactivated catalyst, and the pore volume of the catalyst could be effectively increased by using microwaves of appropriate power.

[0112] The specific process is as follows: During the impregnation process, a microwave generator is installed on the reactor used for impregnation, and the power of the microwave generator is adjusted to 1kW. Every time it is turned on for 1 minute, it is turned off for 1 minute, and the catalyst in the reactor is subjected to microwave action for 2 hours. After the impregnation ends, the microwave generating device is turned off simultaneously; all the other operating steps, parameters, and conditions are the same as in Experimental Example 1; after charcoal regeneration, the pore volumes of each group of catalysts are detected one by one, and the experimental results are as shown i...

experiment example 3

[0120] During the experimental process of the present invention, the inventor unexpectedly found that before sulfurizing the catalyst after charcoal regeneration, use organic complexing agent and unsaturated organic solvent to mix and compound, especially organic complexing agent and conjugated When diolefins or unsaturated aliphatic carboxylic acid esters are mixed and compounded, the catalyst is impregnated, which not only makes the organic complexing agent fully dispersed in the micropores of the catalyst, but also fully contacts with the active center of the catalyst, which improves the activity of the catalyst and improves The specific gravity of the active center containing the lone pair of electrons in the catalyst makes it easier for the active center of the catalyst to form a covalent form, which can better promote the recovery of the activity of the catalyst, facilitate the subsequent sulfuration process, and improve the degree of catalyst activity recovery after sulfu...

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Abstract

The invention provides a method for activity recovery and vulcanization of a hydrogenation catalyst. The method comprises the following steps: using a mixed solution of an acidic organic reagent and carboxylic ester for pre-treating an inactivated hydrogenation catalyst, and then destructively distilling the hydrogenation catalyst, and charring and regenerating the hydrogenation catalyst after destructive distillation; soaking the hydrogenation catalyst after charring and regenerating in the mixed solution of an organic complexing agent and an unsaturated organic solvent; sulfidizing the soaked hydrogenation catalyst; passivating the hydrogenation catalyst after sulfidizing. According to the method for activity recovery and vulcanization of the hydrogenation catalyst provided by the invention, the activity of the regenerated catalyst is effectively promoted, the production cycle of regeneration and vulcanization of catalysts in the prior art is shortened, the energy consumption is reduced and the reduction of production cost is benefited.

Description

technical field [0001] The invention relates to a hydrogenation catalyst activity recovery and sulfidation method, in particular to the activity recovery and external sulfidation of a second-type active center hydrogenation catalyst. Background technique [0002] With the development of the economy and the improvement of environmental protection requirements, my country's fuel emission standards will gradually be in line with those of Europe and the United States, and the demand will also increase greatly. EU regulations stipulate that in 2009 European vehicle fuels implement the European V standard, limiting the sulfur content in oil to below 10g / g. According to the national V vehicle fuel quality standard implemented in my country, the sulfur content needs to be reduced to below 10 μg / g. [0003] 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): B01J37/20B01J37/34B01J37/08B01J37/02
CPCB01J37/0203B01J37/08B01J37/20B01J37/346
Inventor 王小英
Owner 上海竣铭化工工程设计有限公司
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