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Catalyst for selective hydrogenation of phenylacetylene in styrene

A technology of hydrogenation catalyst and phenylacetylene, which is applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, hydrocarbon, etc., and can solve the loss of styrene and the amount of styrene flow rubber High, incomplete hydrogenation of phenylacetylene, etc., to achieve the effect of prolonging service life, improving surface properties and acid properties, and avoiding deposition

Active Publication Date: 2013-01-23
GUANGDONG XINHUAYUE HUADE TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of two catalysts and two-stage hydrogenation undoubtedly increases the complexity of the process, and the hydrogenation of phenylacetylene is still incomplete, styrene is still lost (about 0.1%), and the amount of styrene flow rubber after hydrogenation is still relatively small. High (about 600ppm)

Method used

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  • Catalyst for selective hydrogenation of phenylacetylene in styrene
  • Catalyst for selective hydrogenation of phenylacetylene in styrene
  • Catalyst for selective hydrogenation of phenylacetylene in styrene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Choose Al 2 o 3 -SiO 2 As carrier, according to the total mass of catalyst 100%, the mass content of Ni is 20%, the mass content of Zr is 2%, the mass content of W is 1.3%, and the mass content of Li is 6% of Ni. Among them, the BET specific surface area of ​​the carrier is 140 m 2 / g, pore volume 0.5 ml / g, average pore diameter 10nm, bimodal pore structure.

[0023] The catalyst application effect:

[0024] The ethylene cracking C8 fraction rich in xylene is used as the raw material, in which the concentration of styrene is 37.1%, and the concentration of phenylacetylene is 0.64%. A parallel-flow adiabatic bubbling fixed-bed reactor is adopted, the upper and lower beds are filled with catalyst, and the gas and liquid phase materials are fed at the bottom. The reaction conditions are feed temperature 20°C, reaction pressure 0.8Mpa, hydrogen-oil ratio 3, space velocity 5h -1 . The reaction results are shown in Table 1:

[0025] Table I

[0026]

Embodiment 2

[0028] Choose Al 2 o 3 -SiO 2 As a carrier, based on 100% of the total mass of the catalyst, the mass content of Ni is 13%, the mass content of Zr is 2.5%, the mass content of Cr is 1.1%, and the mass content of Li is 7% of Ni. Among them, the BET specific surface area of ​​the carrier is 200 m 2 / g, pore volume 0.2 ml / g, average pore diameter 25nm, bimodal pore structure.

[0029] The catalyst application effect:

[0030] The ethylene cracking C8 fraction rich in xylene is used as the raw material, in which the concentration of styrene is 37.1%, and the concentration of phenylacetylene is 0.64%. A parallel-flow adiabatic bubbling fixed-bed reactor is adopted, the upper and lower beds are filled with catalyst, and the gas and liquid phase materials are fed at the bottom. The reaction conditions are feed temperature 30°C, reaction pressure 6Mpa, hydrogen-oil ratio 10, space velocity 20h -1 . The reaction results are shown in Table 2:

[0031] Table II

[0032]

Embodiment 3

[0034] Choose Al 2 o 3 -SiO 2 As carrier, according to the total mass of catalyst 100%, the mass content of Ni is 15%, the mass content of Zr is 2.5%, the mass content of Cr is 1.8%, and the mass content of Li is 8% of Ni. Among them, the BET specific surface area of ​​the carrier is 160m 2 / g, pore volume 0.4ml / g, average pore diameter 16nm, bimodal pore structure.

[0035] The catalyst application effect:

[0036] The ethylene cracking C8 fraction rich in xylene is used as the raw material, in which the concentration of styrene is 37.1%, and the concentration of phenylacetylene is 0.64%. A parallel-flow adiabatic bubbling fixed-bed reactor is adopted, the upper and lower beds are filled with catalyst, and the gas and liquid phase materials are fed at the bottom. The reaction conditions are feed temperature 25°C, reaction pressure 9Mpa, hydrogen oil ratio 20, space velocity 30h-1 . The reaction results are shown in Table 3:

[0037] Table three

[0038]

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Abstract

The invention discloses a catalyst for selective hydrogenation of phenylacetylene in styrene. According to the catalyst, Al2O3-SiO2, Al2O3 or SiO2 is used as a carrier, Ni serves as an active component, and at least one of metals of the IVB family in the periodic table of the elements, at least one of metals of the VIB family in the periodic table of the elements and at least one alkali metal and / or alkaline-earth metal are / is taken as an assistant(s); according to total 100% by mass of the catalyst, Ni accounts for 12%-21%, at least one of metals of the IVB family accounts for 0.6%-8%, the at least one of metals of the VIB family accounts for 0.5%-1.5%, and at least one alkali metal and / or alkaline-earth metal accounts for 5%-10%. By using the catalyst, after hydrogenation, the minimum content of phenylacetylene in C8 fraction is 0, the minimum loss of styrene is 0 or above and the generated colloid is less than or equal to 10mg / ml.

Description

technical field [0001] The invention relates to a selective hydrogenation catalyst, in particular to a selective hydrogenation catalyst for phenylacetylene in styrene. Background technique [0002] Ethylene pyrolysis gasoline is rich in aromatic components, and aromatics are rich in styrene. A set of 1 million tons of ethylene cracking equipment contains about 5% styrene in pyrolysis gasoline, and the enriched C8 fraction can contain about 40% styrene. . The current process is to directly carry out two-stage hydrogenation of the C6-C8 fraction, and hydrogenate and saturate unsaturated aromatics such as styrene for separation. Finally, styrene exists in xylene in the form of ethylbenzene and the like. Generally, the content of ethylbenzene in xylene can reach 40-60%. If it is used as PX raw material, it will directly affect the yield of the target product and affect economic benefits. If the styrene in the carbon eight component can be extracted, considerable economic benef...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/888B01J23/86B01J35/10C07C15/46C07C7/167
Inventor 阚一群庞海舰
Owner GUANGDONG XINHUAYUE HUADE TECH
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