Method for preparing catalyst applied to preparation of ethylene by hydrogenation of acetylene through super-gravity process and application of catalyst

A technology of acetylene hydrogenation and high gravity method, which is applied in the direction of molecular sieve catalysts, chemical instruments and methods, catalyst activation/preparation, etc. It can solve the problems of unreported catalysts, high catalyst costs, and low preparation costs, so as to avoid hydrogen reduction Effects of operation, stability enhancement, and activity enhancement

Pending Publication Date: 2017-07-07
SHENWU TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, acetylene produced by calcium carbide method and purified may still contain H 2 S, AsH 3 、PH 3 Such impurity gases can easily lead to catalyst poisoning
However, the above problems have not been reported in the related research of catalysts.
At the same time, the traditional catalytic hydrogenation uses noble metal Pd as the main catalyst, and Ag, Au and other additives need to be added in addition, and the catalyst cost is relatively high. However, although the performance of Ni in selective catalytic hydrogenation is reduced, its preparation cost is relatively low. and still receive attention

Method used

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  • Method for preparing catalyst applied to preparation of ethylene by hydrogenation of acetylene through super-gravity process and application of catalyst
  • Method for preparing catalyst applied to preparation of ethylene by hydrogenation of acetylene through super-gravity process and application of catalyst
  • Method for preparing catalyst applied to preparation of ethylene by hydrogenation of acetylene through super-gravity process and application of catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0056] refer to figure 1, in step S100, weigh 7.2g of nickel nitrate and 25g of zinc nitrate and dissolve them in 30g of deionized water, then add 2g of hexamethylenetetramine and 1.5g of PVP and ultrasonicate at 60°C for 10 minutes, and the ultrasonic power is set to 360W, forming the first solution. Then in step S200, weigh 100g of SBA-16 and add it to 65g of NMP, and mix it with the above-mentioned first solution to form a mixed solution, and transfer it to the high-gravity rotating packed bed for co-impregnation, wherein the rotating speed of the high-gravity rotating packed bed The setting is 1500r / min, the supergravity level is controlled at 100G, and the time is maintained for 50min. Then in step S300, the mixed solution treated in step S200 is centrifuged, and the solid matter is washed with absolute ethanol for 2 to 3 times and then dried by suction. The drying process is maintained at 120° C. for 10 hours. Then in step S400 , calcined in a nitrogen atmosphere at a ...

Embodiment 2

[0059] refer to figure 1 , in step S100, weigh 7.2g of nickel nitrate and 25g of zinc nitrate and dissolve them in 30g of deionized water, then add 2g of hexamethylenetetramine and 1.5g of PVP and ultrasonicate at 60°C for 10 minutes, and the ultrasonic power is set to 360W, forming the first solution. Then in step S200, weigh 100g of SBA-16 and add it to 65g of NMP, and mix it with the above-mentioned first solution to form a mixed solution, and transfer it to the high-gravity rotating packed bed for co-impregnation, wherein the rotating speed of the high-gravity rotating packed bed The setting is 1700r / min, the supergravity level is controlled at 120G, and the time is maintained for 50min. Then in step S300, the mixed solution treated in step S200 is centrifuged, and the solid matter is washed with absolute ethanol for 2 to 3 times and then dried by suction. The drying process is maintained at 100° C. for 10 hours. Then in step S400 , calcined in a nitrogen atmosphere at a...

Embodiment 3

[0062] refer to figure 1 , in step S100, weigh 7.2g of nickel nitrate and 25g of zinc nitrate and dissolve them in 30g of deionized water, then add 2g of hexamethylenetetramine and 1.5g of PVP and ultrasonicate at 60°C for 10 minutes, and the ultrasonic power is set to 360W, forming the first solution. Then in step S200, weigh 100g of SBA-16 and add it to 65g of NMP, and mix it with the above-mentioned first solution to form a mixed solution, and transfer it to the high-gravity rotating packed bed for co-impregnation, wherein the rotating speed of the high-gravity rotating packed bed The setting is 2000r / min, the supergravity level is controlled at 150G, and the time is maintained for 40min. Then in step S300, the mixed solution treated in step S200 is centrifuged, and the solid matter is washed with absolute ethanol for 2 to 3 times and then dried by suction. The drying process is maintained at 150° C. for 10 hours. Then in step S400 , calcined in a nitrogen atmosphere at a...

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Abstract

The present application discloses a method for preparing a catalyst for hydrogenation of acetylene to ethylene by a high gravity method, which comprises the following steps: dissolving nickel nitrate and zinc nitrate in deionized water, adding hexamethylenetetramine and PVP for ultrasonic treatment Obtain the first solution, then add mesoporous molecular sieve SBA-16 into NMP and mix with the first solution to obtain a mixed solution, then move to a high-gravity rotating packed bed for co-immersion, and centrifuge the mixed solution to obtain a solid substance After drying, it was calcined under a nitrogen atmosphere and naturally lowered to room temperature and then subjected to reduction treatment in a weakly alkaline liquid phase environment to obtain a Ni-Zn / SBA-16 catalyst. The present application also provides an application method of the catalyst prepared by the above method. The catalyst prepared by the above method has a significantly longer cycle life than the catalyst prepared by the traditional method in industrial applications, and can be directly used for the reaction after being reduced by sodium borohydride before use, without the need for high-temperature hydrogen reduction, which is more beneficial to simplify gas-liquid ‑Process flow of solid three-phase catalytic system.

Description

technical field [0001] The application relates to the technical field of hydrogenation of acetylene to ethylene, in particular to a method and application of a catalyst for hydrogenation of acetylene to ethylene prepared by a high-gravity method. Background technique [0002] In the field of petrochemical industry, the process of preparing ethylene from petroleum cracking usually contains a small amount of acetylene. In order to prevent acetylene from poisoning the ethylene polymerization catalyst, it is necessary to remove acetylene in the industry, and the catalytic selective hydrogenation of acetylene is the most effective one. method is also a research hotspot in recent years. The reaction system of the catalyst is also aimed at reducing the process conditions of hydrogenation of acetylene to ethylene in an ethylene-rich environment. In the coal chemical technology, the production of acetylene by using coal as raw material through the calcium carbide process has been wi...

Claims

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Application Information

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IPC IPC(8): B01J29/03B01J37/02C07C5/09C07C11/04
CPCY02P20/52B01J29/0333B01J37/0203B01J2229/186C07C5/09
Inventor 史东军史雪君刘周恩余海鹏吴黎阳黄伟苏二强吴道洪
Owner SHENWU TECH GRP CO LTD
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