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Nickel-based selective hydrogenation catalyst, preparation method and application thereof

A hydrogenation catalyst and selective technology, which is applied in the field of petrochemical industry, can solve the problems of rapid activity decline, frequent catalyst regeneration, and rapid increase of inlet temperature, etc., and achieves easy operation, stable selectivity and activity, and simple and easy preparation method Effect

Active Publication Date: 2016-03-02
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in practical applications, the catalyst exhibits a rapid decline in activity, a rapid increase in the inlet temperature of the first-stage reactor, and frequent catalyst regeneration.

Method used

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  • Nickel-based selective hydrogenation catalyst, preparation method and application thereof
  • Nickel-based selective hydrogenation catalyst, preparation method and application thereof
  • Nickel-based selective hydrogenation catalyst, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Add 600g sodium metaaluminate (Al 2 o 3 ≥24.0%), heated to 40°C, called solution A.

[0031] Add 800g of aluminum sulfate to 2L of water and raise the temperature to 40°C, called solution B.

[0032] Add solution B dropwise to solution A, and the dropping time is controlled at 30 minutes, and stir while adding dropwise, so that solutions A and B undergo a precipitation reaction.

[0033] After the dropwise addition, keep stirring for 15 minutes, then turn on the ultrasonic wave, control the frequency to 20Khz, and the sound intensity to 0.5W / cm 2 , static aging for 60 minutes.

[0034] The reactant was filtered and washed, and the temperature of the washing water was kept at 40°C.

[0035] Alumina hydrate was obtained, and the alumina hydrate was dried at 120° C. for 24 hours, and it was determined to have a pseudo-boehmite structure by X-ray diffraction.

[0036] After the prepared pseudo-boehmite was roasted at 500°C for 3 hours, the specific surface area was det...

Embodiment 2

[0043] Add 600g sodium metaaluminate (Al 2 o 3 ≥24.0%), heated to 40°C, called solution E.

[0044] Add 800g of aluminum sulfate to 5L of water and heat up to 50°C, called solution F.

[0045] Add the solution E dropwise to the solution F, the dropping time is controlled at 30 minutes, and stir while adding dropwise, so that the solutions E and F undergo a precipitation reaction.

[0046] After the dropwise addition, keep stirring for 15 minutes, then turn on the ultrasonic wave, control the frequency to 50Khz, and the sound intensity to 0.45W / cm 2 , static aging for 60 minutes.

[0047] The reactant was filtered and washed, and the temperature of the washing water was kept at 50°C.

[0048] Alumina hydrate was obtained, and the alumina hydrate was dried at 120° C. for 24 hours, and it was determined to have a pseudo-boehmite structure by X-ray diffraction.

[0049] After the prepared pseudo-boehmite was roasted at 500°C for 3 hours, the specific surface area was determin...

Embodiment 3

[0056] Add 400g sodium metaaluminate (Al 2 o 3 ≥41.0%), heated to 60°C, called solution I.

[0057] Add 850g of aluminum sulfate to 3L of water and heat up to 60°C, called solution J.

[0058] Add solution J dropwise to solution I, and the dropping time is controlled at 45 minutes, while stirring while adding dropwise, so that solutions I and J undergo a precipitation reaction.

[0059] After the dropwise addition, keep stirring for 30 minutes, then turn on the ultrasonic wave, control frequency 35Khz, sound intensity 0.4W / cm 2 , static aging for 120 minutes.

[0060] The reactant was filtered and washed, and the temperature of the washing water was kept at 60°C.

[0061] Alumina hydrate was obtained, and the alumina hydrate was dried at 125° C. for 24 hours, and it was determined to have a pseudo-boehmite structure by X-ray diffraction.

[0062] After the prepared pseudo-boehmite was roasted at 500°C for 3 hours, the specific surface area was determined to be 363m2 by ni...

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Abstract

The invention belongs to the technical field of petrochemical industry, and particularly relates to a nickel base selective hydrogenation catalyst for gasoline cracking, a preparation method and an application thereof, wherein the nickel base selective hydrogenation catalyst adopts nickel as an active component, adopts Al2O3 as a carrier, and contains (calculated as the weight of the oxide) 8-20 wt.% of Nio and the balance of Al2O3, the carrier is a theta-Al2O3 and delta-Al2O3 mixed phase carrier, the specific surface area of the catalyst is 110-130 m<2> / g, the pore volume is 0.40-0.45 mL / g, pore size distribution of the catalyst is centralized, the radius of more than 70% of the pores is 5-10 nm, and the average pore radius is 6-8 nm. According to the present invention, the catalyst adopts the metal Ni as the active component, adopts the theta and delta mixed phase alumina as the carrier, has characteristics of a certain gum resistance, a certain arsenic resistance, high hydrogenation load bearing, stable selectivity and stable activity, and is suitable for the first section selective hydrogenation in gasoline cracking; and the preparation method has characteristics of simpleness, easy performing and easy operation.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry, and in particular relates to a nickel-based selective hydrogenation catalyst for pyrolysis gasoline, its preparation method and application. Background technique [0002] The by-product of hydrocarbon cracking to produce ethylene is a light liquid product, usually called pyrolysis gasoline, with a boiling range of 50-200°C, and its main components are C6-C9 hydrocarbons, sometimes including C5 hydrocarbons and heavy hydrocarbons above C9. Its composition and yield are related to cracking raw materials, cracking methods and cracking conditions. When gaseous hydrocarbons such as ethane, propane and butane are used as raw materials, the yield is only 2% to 5% (mass) of the raw materials; if liquid hydrocarbons such as naphtha and light diesel oil are used as raw materials, the yield is 15% to 20% (by mass). [0003] The composition of pyrolysis gasoline contains a large amount of un...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/755C10G45/36
Inventor 王昊姜建波薛红霞白志敏齐焕东赵庆鲁梁卫忠余汉涛赵沁
Owner CHINA PETROLEUM & CHEM CORP
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