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Preparation method and application of hydrogenation catalyst

A hydrogenation catalyst and oxidant technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as waste, resource utilization of NOx gas and dust, and reduce consumption and nitric acid. The effect of consumption

Active Publication Date: 2022-05-06
CHINA PETROLEUM & CHEM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these methods reduce harmful waste emissions, they do not make resourceful utilization of NOx gas and dust, resulting in waste

Method used

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  • Preparation method and application of hydrogenation catalyst
  • Preparation method and application of hydrogenation catalyst

Examples

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Effect test

preparation example Construction

[0040] A first aspect of the present invention provides a method for preparing a hydrogenation catalyst, the method comprising the following steps:

[0041] 1) The step of kneading and molding the carrier raw material and the kneading solution;

[0042] 2) Carrying out the step of first roasting the product obtained in step 1) to obtain a hydrogenation catalyst carrier;

[0043] 3) a step of first contacting the hydrogenation catalyst carrier obtained in step 2) with the metal salt solution;

[0044] 4) performing a second roasting on the product obtained in step 3) to obtain a hydrogenation catalyst;

[0045] Wherein, the method also includes: recovering and treating the roasting tail gas produced in step 2) and / or step 4), obtaining dust-containing water and recycled nitric acid, and using the dust-containing water and recycled nitric acid in the preparation step 1) The step of kneading the liquid in the method; the treatment includes: performing water dedusting treatment ...

Embodiment

[0083] The present invention will be described in detail through examples below, but the present invention is not limited to the following examples.

[0084] In the following examples, the macroporous alumina was purchased from Chalco Shandong Co., Ltd., and the wet dust collector was manufactured by Jiangsu Erhuan Environmental Protection Technology Co., Ltd., model EHVQL 700. The environmental protection device is manufactured by Sinopec Energy Conservation and Environmental Protection Technology Co., Ltd. The concentration of concentrated nitric acid was 65% by mass.

preparation example 1

[0086] (1) Weigh 60 kg of macroporous alumina as a carrier material and put it into a kneader, mix concentrated nitric acid and purified water at a mass ratio of 0.015:1 to obtain a kneading liquid. Add 55kg of kneading liquid into the kneader, knead at 30°C for 20 minutes, extrude the kneaded material with an extruder, and dry the strips at a temperature of 110°C for 45 minutes to obtain dry strips.

[0087] (2) Put the dry bar obtained in step (1) into a converter, and roast at 750° C. for 3.5 hours to obtain a catalyst carrier. Pass the exhaust gas of the converter into the wet dust collector equipped with a cyclone (wind pressure is 0.4MPa, the volume ratio of exhaust gas to water is 200:1), and obtain dust-containing water and dust-removed exhaust gas. The volume ratio of exhaust gas to hydrogen peroxide is 60:1 The dedusting tail gas is passed into a plate tower with a concentration of 15 mass % hydrogen peroxide having 4 plates and a tower diameter of 50 cm, and counter...

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Abstract

The invention relates to the field of catalysts, and discloses a preparation method and application of a hydrogenation catalyst, and the method comprises the following steps: 1) mixing and kneading a carrier raw material and a mixing and kneading liquid, and molding; (2) carrying out first roasting on the product obtained in the step (1) to obtain a hydrogenation catalyst carrier; (3) carrying out first contact on the hydrogenation catalyst carrier obtained in the step (2) and a metal salt solution; and 4) performing secondary roasting on the product obtained in the step 3) to obtain the hydrogenation catalyst. According to the preparation method provided by the invention, the nitric acid consumption in hydrogenation catalyst production is remarkably reduced, the consumption of metal salt and carrier raw materials is reduced, and the structural parameters of the obtained hydrogenation catalyst are consistent with those of a hydrogenation catalyst obtained by a traditional method.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to a method for preparing a low-emission and low-consumption hydrogenation catalyst and its application. Background technique [0002] In the existing method for preparing hydrogenation catalysts, dilute acid is needed as a peptizing agent during the molding process of the catalyst, so that the alumina supports are bonded to each other and formed. Because nitric acid has the advantages of strong acidity, easy decomposition, low price, and no residue in the catalyst after decomposition, it is the most widely used acid in the preparation of hydrogenation catalysts. However, during the roasting process of the catalyst, nitric acid or nitrate will produce NOx gas, which has a great impact on the environment. At the same time, during the calcination process of the catalyst, a lot of dust containing heavy metals will also be formed. If these dusts are not removed in time, they will also cause gr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01J21/04B01J35/10B01D53/78B01D53/56C01B21/40C10G45/06C10G47/04B01D47/00
CPCB01J23/755B01J21/04B01J37/0018B01D53/78B01D53/56C01B21/40C10G45/06C10G47/04B01D47/00B01D2251/106B01D2251/104B01D2251/108B01D2257/404B01D2258/02B01J35/615B01J35/635Y02P20/52
Inventor 李顺新宋春利王翀杨义李志浩付超超
Owner CHINA PETROLEUM & CHEM CORP
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