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Catalysis upgrading method for cracking ethylene by-product carbon-9

A technology for the catalytic extraction of carbon nine and ethylene by-product, which is applied in the petroleum industry, hydroprocessing process, and hydrocarbon oil treatment, can solve problems such as instability, dark color, and strong odor, and achieve increased life, simple process, and suppression Effects of Aggregation and Coking

Active Publication Date: 2010-12-15
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved in the present invention is to solve the problems of dark color, strong odor and instability in the utilization process of cracked ethylene by-product C9, and realize the cracked ethylene by-product by using high-octane gasoline fraction or high-grade aromatic solvent oil as the target product C9 Catalytic Upgrading

Method used

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  • Catalysis upgrading method for cracking ethylene by-product carbon-9
  • Catalysis upgrading method for cracking ethylene by-product carbon-9
  • Catalysis upgrading method for cracking ethylene by-product carbon-9

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Embodiment 1

[0020] The first-stage hydrogenation catalyst adopts a supported nickel-based catalyst. The carrier adopts SiO 2 -Al 2 o 3 , the specific surface area is 200-400m 2 / g, the pore volume is 0.5-2.0cm 3 / g, the most probable pore size distribution is 2-4nm and 10-15nm. The metal nickel precursor is nickel nitrate, nickel acetate or nickel acetylacetonate. The supported nickel-based catalyst is prepared through the steps of impregnation-drying-calcination-reduction and the like by adopting an equal-volume impregnation method, and the nickel content is between 5-30%, preferably between 10-20%.

[0021] The second-stage hydrogenation catalyst uses a supported cobalt-molybdenum sulfide catalyst. The carrier adopts SiO 2 -Al 2 o 3 , the specific surface area is 200-400m 2 / g, the pore volume is 0.5-2.0cm 3 / g, the most probable pore size distribution is 2-4nm and 10-15nm. Cobalt molybdenum sulfide precursor adopts cobalt nitrate or cobalt acetate or cobalt acetylacetonate ...

Embodiment 2

[0023] The one-stage hydrogenation catalyst adopts supported palladium-based catalyst. The carrier adopts SiO 2 -Al 2 o 3 , the specific surface area is 200-400m 2 / g, the pore volume is 0.5-2.0cm 3 / g, the most probable pore size distribution is 2-4nm and 10-15nm. The metal palladium precursor is palladium nitrate, palladium chloride, palladium acetate or palladium acetylacetonate. The supported palladium-based catalyst is prepared by the steps of impregnation-drying-roasting-reduction and the like by adopting an equal-volume impregnation method, and the nickel content is between 0.1-5%, preferably between 0.5-3%.

[0024] The second-stage hydrogenation catalyst uses a supported nickel-molybdenum sulfide catalyst. The carrier adopts SiO 2 -Al 2 o 3 , the specific surface area is 200-400m 2 / g, the pore volume is 0.5-2.0cm 3 / g, the most probable pore size distribution is 2-4nm and 10-15nm. The precursor of nickel molybdenum sulfide is nickel nitrate or nickel aceta...

Embodiment 3

[0026] The properties of a by-product C9 fraction from cracking ethylene are shown in Table 1. It can be seen from the table that the by-product of cracking ethylene, the C9 fraction, has a higher density, a higher distillation range than gasoline, a high content of sulfur and nitrogen, and contains a large amount of colloid and diene components. Therefore, the production of high-octane gasoline components or high-grade aromatic solvent oils by cracking ethylene by-product carbon nine fractions requires the removal of sulfur, nitrogen, colloids and diolefins, etc., while reducing the density and distillation range.

[0027] Table 1 Properties of cracked ethylene by-product carbon nine cuts

[0028]

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Abstract

The invention discloses a catalysis upgrading method for cracking ethylene by-product carbon-9, belonging to the field of heterogeneous catalysis. The catalysis upgrading method is characterized by comprising the following steps of: firstly, carrying out selective hydrogenation reaction on a metal (noble metal or non-noble metal) catalyst under the mild condition and eliminating dialkene and styrene derivatives, carrying out hydrogenation refining reaction on a sulfide catalyst, and eliminating monoene, nitrogen-containing compounds and sulfur-containing compounds through monoolefine hydrogenation saturation, hydrogen desulfurization and hydrogenation denitrogenation reaction to obtain a water-white and odorless carbon-9 product with favorable stability. The carbon-9 product can be used as a high-octane gasoline ingredient and higher aromatics solvent oil. The metal catalyst and the sulfide catalyst used in the invention are prepared by selecting a proper carrier according to the component and the performance of the cracking ethylene by-product carbon-9 through liquid phase and gaseous phase deposition methods. The invention has the advantages of simple process, high catalyst activity and selectivity, and favorable economic benefit and industrial application potentials.

Description

technical field [0001] The invention belongs to the field of heterogeneous catalysis, and relates to a technology for producing high-octane gasoline components or high-grade aromatic solvent oil through catalytic upgrading of C9, a by-product of cracking ethylene. Background technique [0002] With the rapid development of my country's petrochemical industry, the production capacity of ethylene is increasing year by year. The cracked C9 fraction is one of the main by-products of cracking ethylene, accounting for about 10-20% of the total ethylene output. It is estimated that in 2010, the output of cracked carbon nine fractions in my country will reach more than 1 million tons per year. Therefore, the reasonable and effective use of the by-product carbon nine fraction of cracking ethylene is attracting more and more attention. The composition of cracked carbon nine fractions is complex, the main components are styrene and its derivatives, indene and its derivatives, diene c...

Claims

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Application Information

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IPC IPC(8): C10G65/06
Inventor 梁长海
Owner DALIAN UNIV OF TECH
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