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Selective hydrogenation catalyst and its application and hydrogenation process of carbon dioxide fraction in steam cracking to produce ethylene

A technology of selective hydrogenation and hydrogenation catalysis, applied in catalysts, hydrogenation to hydrocarbons, carbon compound catalysts, etc. The effect of hydrogen selectivity

Active Publication Date: 2021-03-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] In summary, the existing technology has the problem of unutilized green oil resources, so it is necessary to develop a process that can reduce the load of hydrogenation and remove alkyne, increase the production of high value-added butadiene, and have a low amount of green oil

Method used

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  • Selective hydrogenation catalyst and its application and hydrogenation process of carbon dioxide fraction in steam cracking to produce ethylene
  • Selective hydrogenation catalyst and its application and hydrogenation process of carbon dioxide fraction in steam cracking to produce ethylene
  • Selective hydrogenation catalyst and its application and hydrogenation process of carbon dioxide fraction in steam cracking to produce ethylene

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specific Embodiment approach

[0037] According to a specific embodiment of the present invention, the catalyst carrier is prepared by a method comprising the following steps:

[0038] 1) Using an equal-volume impregnation method, mixing the phosphoric acid solution and the powder of the porous inorganic oxide carrier, followed by drying, molding, and roasting to obtain a solid;

[0039] 2) Mixing the solid matter with an organic solution of ethylene glycol antimony, followed by drying and hydrolysis to obtain the catalyst carrier.

[0040] In step 1), the impregnation can be performed at room temperature.

[0041] In step 2), the molding can be carried out on an extruder.

[0042] In the organic solution of ethylene glycol antimony, non-limiting examples of organic solvents include: one or more of methanol, ethanol, ethylene glycol, propylene glycol, isopropanol, glycerol, formic acid, acetic acid, acetone . Preferably, the solvent is ethanol and / or ethylene glycol.

[0043] The hydrolysis conditions m...

Embodiment 1

[0070] (1) Preparation of catalyst carrier

[0071] Put the weighed alumina powder in a beaker, impregnate the alumina powder with an equal volume of 1mol / L phosphoric acid solution, then dry it at 120°C for 12 hours, and then shape it in an extruder, at 400°C Roasted for 6 hours to obtain the diameter Strip-shaped solids with a length of 1-3 mm.

[0072] Spray 1 mol / L ethylene glycol antimony solution in absolute ethanol on the bar-shaped solid, then dry it in an oven at 120°C, and then treat it with steam at 90°C for 6 hours for hydrolysis to obtain the carrier PS- Al 2 o 3 , the amount of the above-mentioned raw materials makes the content of P in the catalyst 0.5wt%, and the content of Sb is 0.5wt%.

[0073] (2) load

[0074] Using the equal volume impregnation method, the 1mol / L palladium nitrate aqueous solution and the above-mentioned carrier PS-Al 2 o 3 Mix, load 0.01wt% palladium, then dry at 120°C for 4 hours, then bake at 500°C for 4 hours; then use equal volu...

Embodiment 2

[0076] Prepare the selective hydrogenation catalyst according to the method of Example 1, the difference is that the amount of silver nitrate impregnating solution is adjusted so that the loading of Ag is 0.03wt%, so as to obtain 0.01Pd0.03Ag / PS-Al 2 o 3 Catalyst, denoted as B.

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Abstract

The invention belongs to the field of catalyst hydrogenation, and specifically provides a selective hydrogenation catalyst and application thereof and a hydrogenation process of a C-2 fraction in production of ethylene by steam cracking. The selective hydrogenation catalyst comprises a catalyst support, a main active component and an optional co-active component, wherein the catalyst support is aP and Sb modified porous inorganic oxide support; the active component comprises Pd And Ag; the selective hydrogenation catalyst for the hydrogenation process of the C-2 fraction comprises 0.01 to 1.0wt% of P, 0.01 to 1.0 wt% of Sb, and 0.001 to 0.1 wt% of Pd, and the weight ratio of Ag / Pd is 3:1 to 20:1. The catalyst has a complex function of selective hydrogenation and partial hydrogenation ofethylene acetylene dimerization, thereby improving the yield of 1,3-butadiene in the hydrogenation reaction of the C-2 fraction.

Description

technical field [0001] The invention belongs to the field of catalyst hydrogenation, and in particular relates to a selective hydrogenation catalyst and its application, and a hydrogenation process for carbon distillates in steam cracking to produce ethylene. Background technique [0002] Due to the abundant ethane resources in the Middle East, the shale gas revolution in the United States, and China’s coal chemical industry wave (such as coal-to-olefin MTO), the production of ethylene has increased dramatically and has become cheaper and cheaper. The traditional steam cracking ethylene route has encountered major challenges. However, heavy hydrocarbons become scarce, and increasing the output of heavy hydrocarbons such as C4 has become an important trend to improve the economical efficiency of the steam cracking unit route. In addition, the source of butadiene is mainly obtained from the mixed C4 fraction extracted from the by-product of the ethylene cracking unit, and a sm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/186B01J27/192B01J27/198C07C5/09C07C11/04C07C2/38C07C11/167
CPCB01J27/186B01J27/192B01J27/198C07C2/38C07C5/09C07C2527/186C07C2527/192C07C2527/198C07C11/04C07C11/167Y02P20/52
Inventor 王育乐毅刘小波彭晖王国清
Owner CHINA PETROLEUM & CHEM CORP
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