Ex-situ presulfurizing method of hydrogenation catalyst

A hydrogenation catalyst and external pre-sulfiding technology, which are applied in chemical instruments and methods, catalyst activation/preparation, physical/chemical process catalysts, etc., to achieve the effects of less pollution, less loss and low price

Active Publication Date: 2013-04-17
BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, choosing it as a vulcanizing agent has the following disadvantages: (1) at least two impregnations are required to achieve a certain sulfur holding capacity, and the last drying must be carried out in an inert atmosphere; (2) harmful substances such as hydrogen sulfide are released during drying

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Weigh 6.1g of thioacetamide and add it into 90ml of deionized water at room temperature, stir and dissolve.

[0034] (2) Weigh 100 g of the commercial catalyst and add it into the solution described in step (1) for immersion, leave it at room temperature for 30 hours, dry it, then put it into a tube furnace, and feed it with nitrogen at 120° C. for 8 hours, Catalyst A is obtained.

[0035] (3) Evaluation of diesel hydrogenation activity was carried out on a small continuous hydrogenation reaction device. The reactor was a 25mm×800mm stainless steel tube, and the catalyst filling capacity was 100ml.

[0036]Put 100ml of Catalyst A into the hydrogenation reactor, feed hydrogen, adjust the system pressure to 6.0MPa, the hydrogen volume to 800ml / min, raise the temperature of the reactor to 120°C at a heating rate of 35°C / h, and keep the temperature constant for 2 hours. The catalyst is dehydrated, and then the reactor is heated to 200°C at a heating rate of 35°C / h, and...

Embodiment 2

[0038] (1) Weigh 36.5g of thioacetamide and 3.7g of ethanethiol into 90ml of n-propanol at room temperature, stir and dissolve.

[0039] (2) Take by weighing commercial catalyst 100g and add in the solution described in step (1) to impregnate, after standing at room temperature for 30 hours, dry in the air, then put into a tube furnace, feed nitrogen at room temperature for 10 hours to obtain Catalyst B.

[0040] (3) Evaluation of diesel hydrogenation activity was carried out on a small continuous hydrogenation reaction device. The reactor was a 25mm×800mm stainless steel tube, and the catalyst filling capacity was 100ml.

[0041] Put 100ml of Catalyst B into the hydrogenation reactor, feed hydrogen, adjust the system pressure to 6.0MPa, the hydrogen volume to 800ml / min, raise the temperature of the reactor to 120°C at a heating rate of 35°C / h, and keep the temperature constant for 2 hours. The catalyst was dehydrated, and then the temperature of the reactor was raised to 300...

Embodiment 3

[0043] (1) Weigh 24.3g of thioacetamide and 7.3g of thiophene into 90ml of n-propanol at 60°C, stir and dissolve.

[0044] (2) Weigh 100 g of the commercial catalyst and add it into the solution described in step (1) for impregnation, let it stand for 5 hours at a temperature of 60° C., dry it, then put it into a tube furnace, and pass nitrogen gas at 100° C. for 8 hours, to obtain catalyst C.

[0045] (3) Evaluation of diesel hydrogenation activity was carried out on a small continuous hydrogenation reaction device. The reactor was a 25mm×800mm stainless steel tube, and the catalyst filling capacity was 100ml.

[0046] Put 100ml of Catalyst C into the hydrogenation reactor, feed hydrogen, adjust the system pressure to 6.0MPa, the hydrogen volume to 800ml / min, raise the temperature of the reactor to 120°C at a heating rate of 35°C / h, and keep the temperature constant for 2 hours. The catalyst is dehydrated, and then the temperature of the reactor is raised to 500° C. at a rat...

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Abstract

The invention provides an ex-situ presulfurizing method of a hydrogenation catalyst, adopting thioacetamide (CH3CSNH2) as a vulcanizing agent to pretreat the hydrogenation catalyst in oxidation state. The hydrogenation catalyst is mainly used for treating hydrocarbon materials. The vulcanizing agent can be used separately, or can be used in combination with other sulfides. The vulcanizing agent prepared by the method in the invention has the advantages that the cost is low, the method can solve the existing problem of high production cost of the organic vulcanizing agent; furthermore, the technique has the advantages of easy preparation method and equipment, little pollution and easy operation and the like; on the basis of the above advantages, the presulfurizing catalyst prepared by the presulfurizing method in the invention can reach or surpass the effect of in-situ presulfurizing method featuring complex operation and high cost, thus having wide application prospect in the ex-situ presulfurizing technique of hydrogenation catalysts.

Description

technical field [0001] The invention relates to an out-of-machine presulfurization method mainly used for treating hydrocarbon hydrogenation catalysts. Background technique [0002] With the reduction of the world's oil reserves, the trend of heavy crude oil is becoming more and more obvious, and the content of sulfur, nitrogen, and metals in crude oil is increasing. In order to make full use of limited resources and reduce environmental pollution, hydrogenation technology has become a very important processing link in the oil refining industry. Among them, the hydrogenation catalyst used usually contains group VIB hydrogenation active metal molybdenum and / or tungsten, and group VIII hydrogenation Hydrogen-active metal nickel and / or cobalt, these active metals exist in the catalyst in the form of oxidation before use, during the hydroconversion process, although the raw oil contains sulfide, it can be converted into a sulfide state by reaction , but under the reaction condi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J37/20C10G45/04
Inventor 田志坚蒲延芳徐云鹏曲炜闻学兵
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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