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Composite oxide carrier, hydrofining catalyst as well as preparation method and application thereof

A composite oxide, hydrofining technology, applied in metal/metal oxide/metal hydroxide catalyst, catalyst activation/preparation, physical/chemical process catalyst, etc., can solve problems such as poor resistance to silicon poisoning

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 hydrorefining catalyst itself has poor resistance to silicon poisoning, and provides a method for preparing a composite oxide carrier. The hydrorefining catalyst prepared by using the composite oxide of the present invention as a carrier can significantly improve the Anti-silicon poisoning ability of the catalyst, improve the stability of the catalyst, and ensure the regeneration performance of the catalyst after processing the silicon-containing impurity raw material, thereby prolonging the operation period of the device

Method used

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  • Composite oxide carrier, hydrofining catalyst as well as preparation method and application thereof
  • Composite oxide carrier, hydrofining catalyst as well as preparation method and application thereof
  • Composite oxide carrier, hydrofining catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] (A) 35g / L sodium metaaluminate aqueous solution (with Al 2 o 3 The calculated sodium metaaluminate concentration is 35g / L) after stirring for 30min at 55°C, 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.

[0081] (B) After mixing tetraethyl titanate and ammonia water, the pH was kept at 9.5 to obtain a mixed solution B1.

[0082] (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. Dry at 110° C. for 3 h, and then calcinate at 550° C. for 3 h to prepare composite oxide carrier A1.

[0083] The composite oxide support A1, including...

Embodiment 2

[0086] (A) 50g / L sodium metaaluminate aqueous solution (with Al 2 o 3 The concentration of sodium metaaluminate is 50g / L) After stirring 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.

[0087] (B) After mixing titanium sulfate and sodium hydroxide aqueous solution, the pH was kept at 9 to obtain a mixed solution B2.

[0088] (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 a composite oxide carrier A2.

[0089] The composite oxide support A2, including TiO 2 and Al 2 o 3...

Embodiment 3

[0092] (a) preparation concentration is 26.68g / 100mL ammonium molybdate tetrahydrate (every 100mL deionized water contains 26.68g ammonium molybdate tetrahydrate), and then adding 5mL of concentration is 14% by weight of ammonia so that ammonium molybdate tetrahydrate is fully dissolved 100g of the composite oxide carrier A1 prepared in Example 1 was taken, impregnated at room temperature for 2h, filtered, dried at 110°C overnight, then calcined at 300°C for 1h, and then calcined at 550°C for 3h to obtain the catalyst precursor YB-1.

[0093] (b) Then the catalyst precursor YB-1 is impregnated with a solution of cobalt nitrate hexahydrate with a concentration of 22.34g / 100mL, impregnated at room temperature for 2h, filtered, dried overnight at 110°C, and then calcined at 550°C for 4h to obtain Hydrofining catalyst MCAT-1.

[0094] Based on the total weight of the hydrotreating catalyst MCAT-1, TiO 2 The content of the composite oxide support is 15% by weight, MoO 3 The conte...

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Abstract

The invention discloses a composite oxide carrier, a hydrofining catalyst as well as a preparation method and application thereof. The composite oxide carrier comprises TiO2 and Al2O3, wherein the TiO2 is enriched on the surface of the Al2O3 in an island shape and / or a sheet shape. According to the hydrofining catalyst prepared by adopting the composite oxide carrier, the silicon poisoning resistance of the catalyst can be remarkably improved, the stability of the catalyst is improved, and the regeneration performance of the catalyst after a silicon impurity-containing raw material is treated is ensured, so that the operation cycle of a device is prolonged.

Description

technical field [0001] The invention relates to a composite oxide carrier and its preparation method and application, as well as a hydrogenation refining catalyst and its preparation method and application. 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 re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J32/00B01J35/10B01J23/882B01J23/883B01J37/02B01J37/08C10G45/08
CPCB01J21/063B01J23/882B01J23/883B01J23/002B01J37/0201B01J37/088C10G45/08B01J2523/00C10G2300/202B01J35/633B01J35/615B01J2523/31B01J2523/47B01J2523/68B01J2523/845B01J2523/847
Inventor 杜周熊凯纪玉国季静张富春任玉梅
Owner CHINA PETROLEUM & CHEM CORP
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