Hydrogenation catalyst, its process and use

A hydrogenation catalyst and catalyst technology, applied in the direction of selective hydrorefining, etc., can solve the problems of undescribed hydrogenation of styrene and its derivatives, easy polymerization, and high reaction temperature, so as to improve hydrogenation activity and anti-glue The effect of good ability, activity and anti-colloid ability, and simple preparation process

Active Publication Date: 2005-07-27
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this process is: the reaction temperature is high, at this temperature, the diene itself is easy to polymerize, which is not conducive to the long-term operation of the catalyst
The disadvantage of this catalyst is that the auxiliary agent lithium is expensive, and the preparation process of the catalyst carrier is complicated. It needs to be hydrothermally treated with water of 1.3-2.5 MPa, or roasted above 900 ° C, which requires high equipment requirements, and the specific surface of the catalyst is low ( 60-90m 2 / g), the pore volume is relatively small (0.29-0.36cm 3 / g), relatively low reactivity
[0007] Moreover, the above two patents have no description of the hydrogenation of styrene and its derivatives which are very easy to polymerize

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Use pseudo-thin water aluminum hydroxide powder containing 62% alumina (the rest is water) to make small balls with a diameter of 2-5mm. After drying at 120°C for 3 hours, raise the temperature to 600°C in normal pressure air. ℃, keep the temperature for 2 hours, feed water vapor, the volume ratio of water vapor and air is 50%, keep the temperature for another 2 hours under this condition, then stop the water vapor, and continue roasting in the air at 600 ℃ for 3 hours. After being impregnated with a nickel nitrate solution containing 120 g / l of nickel for 3 hours, it is filtered, dried at 80-90° C. for 15 hours, and calcined at 480° C. for 4 hours. The impregnation was repeated one more time to achieve the desired high nickel content, and the drying and firing conditions were the same as above.

[0025] The prepared catalyst composition is: NiO: 28.5%, Al 2 o 3 : 71.5%. Specific surface area: 180 meters 2 / g, pore volume: 0.46 ml / g, the pore volume of pores larger ...

Embodiment 2

[0028] Use pseudo-thin water aluminum hydroxide powder containing 70% alumina (the rest is water) to make small balls with a diameter of 2-5mm. After drying at 110°C for 4 hours, raise the temperature to 630°C in normal pressure air. ℃, keep the temperature for 1 hour, feed water vapor, the volume ratio of water vapor and air is 80%, keep the temperature for another 2 hours under this condition, then stop the water vapor, and continue roasting at 650 ℃ in the air for 2 hours. A nickel nitrate solution containing 130 g / l of nickel is used, impregnated for 4 hours, filtered, dried at 90-100° C. for 10 hours, and roasted at 350° C. for 5 hours.

[0029] The prepared catalyst composition is: NiO: 19.6%, Al 2 o 3 : 80.4%. Specific surface area: 150 meters 2 / g, pore volume: 0.65 ml / g, the pore volume of pores larger than 5nm accounts for 93% of the total pore volume, and the most probable pore diameter is 15nm.

[0030] Catalyst performance evaluation: See Table 1 for the proper...

Embodiment 3

[0032] Use pseudo-thin water aluminum hydroxide powder containing 75% of alumina (the rest is water) to make small balls with a diameter of 2-5mm. After drying at 100°C for 5 hours, raise the temperature to 660°C in normal pressure air. ℃, constant temperature for 1 hour, feed water vapor, the volume ratio of water vapor and air is 30%, keep the temperature for another 2 hours under this condition, then stop the water vapor, and continue roasting in air at 680°C for 2 hours. A nickel nitrate solution containing 150 g / l of nickel is used, impregnated for 5 hours, filtered, dried at 110-120° C. for 8 hours, and roasted at 400° C. for 3 hours.

[0033] The prepared catalyst composition is: NiO: 12.5%, Al 2 o 3 : 87.5%. Specific surface area: 110 meters 2 / g, pore volume: 0.82 ml / g, the pore volume of pores larger than 5nm accounts for 95% of the total pore volume, and the most probable pore diameter is 19nm.

[0034] Catalyst performance evaluation: The raw material oil used ...

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Abstract

A hydrogenation catalyst and its preparation and use are disclosed. The said catalyst consists of NiO 10-30wt.% and Al2O3 70-90wt.%, obtained by: drying quasi-hydrated aluminum oxide powder, passing steam to ream, roasting to have macroporous aluminum oxide carrier, dipping it in a solvent containing nickel compound, filtering, drying, roasting to form the final product. It is suitable for fractional oil containing dialkene and styrene and their derivatives to directly prepare solvent with high aromatic hydrocarbon and gasoline with high octane level by hydrogenation.

Description

technical field [0001] The invention belongs to a hydrogenation catalyst and its technology and application, in particular to a nickel-based catalyst for selective hydrogenation of diolefins, styrene and derivatives, and its technology and application. Background technique [0002] The pyrolysis gasoline fraction is a by-product in the process of pyrolysis of petroleum hydrocarbons to produce ethylene and propylene. It contains dienes, styrene, alkynes, indene and other highly unsaturated hydrocarbons, which are very easy to polymerize raw rubber, affecting the stable operation of devices and catalysts. The task of this catalyst is to selectively hydrogenate these unsaturated hydrocarbons, remove dienes, styrene and its derivatives, some olefins and high colloids, improve product stability, and retain aromatic components at the same time. [0003] In order to increase the operating cycle of the catalyst, the petrochemical enterprises adopt the cracking gasoline processing t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G45/36
Inventor 杜明仙吕占军李学宽唐署光杨英翟效珍
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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