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Catalyst as well as preparation method and application thereof

A catalyst, alumina technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as poor resistance to silicon poisoning and prolonged operation cycle

Pending Publication Date: 2021-12-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the problem that the existing catalyst itself has poor anti-silicon poisoning ability, and provides a catalyst. The catalyst has good anti-silicon poisoning ability and stability, and has good regeneration performance after processing silicon-containing impurity raw materials. Thereby adopting the catalyzer of the present invention can prolong the operation cycle of device

Method used

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  • Catalyst as well as preparation method and application thereof
  • Catalyst as well as preparation method and application thereof
  • Catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] (A) After stirring 35g / L sodium metaaluminate aqueous solution (the concentration of sodium metaaluminate calculated as alumina is 35g / L) at 55°C for 30min, 45% by volume of CO 2 (The rest is air) until the end point is pH=9, and then aged at this temperature for 3h. The aged mixture was poured into a filter, washed with deionized water for 30 minutes at a temperature of 60° C., washed repeatedly for 3 times, and filtered to obtain filter cake A1.

[0076] (B) After mixing tetraethyl titanate and ammonia water, the pH was kept at 9.5 to obtain a mixed solution B1.

[0077] (C) Put the filter cake A1 into the mixed liquid B1, keep it at a temperature of 70°C for 1h, then put it into a filter, wash it with deionized water for 30min, the washing temperature is 20°C, wash it with water 5 times, filter it, and extrude it. Drying at 110° C. for 3 h, and then calcining at 550° C. for 3 h to prepare alumina-titania composite oxide support A1.

[0078] The composite oxide carr...

Embodiment 2

[0081] (A) After stirring 50g / L sodium metaaluminate aqueous solution (the concentration of sodium metaaluminate calculated as alumina is 50g / L) at 35°C for 60min, 35% by volume of CO 2 (The rest is air) to the end point pH = 10.5, and then aged at this temperature for 4 hours. Put the aged mixture into a filter, wash with deionized water for 30 minutes at a temperature of 50° C., wash repeatedly for 3 times, and filter to obtain filter cake A2.

[0082] (B) After mixing titanium sulfate and sodium hydroxide aqueous solution, the pH was kept at 9 to obtain a mixed solution B2.

[0083] (C) Put the filter cake A2 into the mixed liquid B2, keep it at a temperature of 80°C for 1.5h, then put it into a filter, wash it with deionized water for 30min at a temperature of 30°C, wash it 5 times, filter, and extrude , dried at 120° C. for 4 h, and then calcined at 550° C. for 4 h to obtain alumina-titania composite oxide carrier A2.

[0084] The composite oxide carrier A2 includes tit...

Embodiment 3

[0087] (1) Dissolve 7.5g of nickel nitrate and 6.5g of diammonium hydrogen phosphate in 20g of deionized water to obtain a yellow precipitate, add nitric acid dropwise to adjust the pH value to 3, the precipitate dissolves and becomes a green transparent solution, add 8.25g to it for implementation The alumina-titania composite oxide carrier A1 prepared in Example 1 was impregnated at room temperature for 2 hours, filtered, dried at 120° C. for 5 hours, and then calcined at 550° C. for 4 hours to obtain catalyst A1.

[0088] Based on the total weight of catalyst A1, the content of alumina-titania composite oxide is 80.5% by weight, Ni 2 The P content was 19.5% by weight. The catalyst has a pore volume of 0.38mL / g and a specific surface area of ​​195m 2 / g.

[0089] (2) First use hydrogen gas with a hydrogen-to-oil ratio of 200, carry out reduction at 650°C for 2 hours, and then use 1% by weight of CS at 300°C 2 The cyclohexane solution was sulfurized for 8 hours, and after ...

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Abstract

The invention discloses a catalyst as well as a preparation method and application thereof. The catalyst comprises a carrier and an active component, wherein the carrier is an alumina-titanium oxide composite oxide, and the active component is Ni2P. The catalyst has relatively good silicon poisoning resistance and stability, and has relatively good regeneration performance after being used for treating raw materials containing silicon impurities, so that the operation cycle of a device can be prolonged by adopting the catalyst provided by the invention.

Description

technical field [0001] The invention relates to a catalyst, its preparation method and application, and a method for hydrogenation refining of silicon-containing raw materials. Background technique [0002] Silicon impurities in hydrogenation raw materials will lead to deactivation of hydrofining catalysts, and silicon poisoning of hydrogenation catalysts is becoming more and more common. In recent years, domestic refinery gasoline and diesel hydrotreating units and pyrolysis gasoline two-stage hydrotreating have experienced many cases of abnormal operation of reactors caused by catalyst poisoning caused by silicon impurities in raw materials, and catalyst life is far below the design value In some cases, a large amount of silicon is deposited on the catalyst, resulting in a decrease in the specific surface area of ​​the catalyst, a decrease in the pore volume, and a decrease in activity. In severe cases, the catalyst cannot be regenerated to restore activity, causing seriou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/185B01J37/02B01J37/20B01J37/10B01J35/10C10G45/06
CPCB01J27/1853B01J37/0201B01J37/20B01J37/10C10G45/06B01J35/633B01J35/615
Inventor 杜周张富春季静纪玉国熊凯任玉梅
Owner CHINA PETROLEUM & CHEM CORP
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