Method for hydrogen removal of CO mixed gas by selective oxidation

A mixed gas, selective oxidation technology, applied in the direction of carbon monoxide, etc., can solve the problems of low hydrogen removal rate and high CO loss rate

Active Publication Date: 2011-10-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is the technical problem of high CO loss rate and low hydrogen removal rate in the process of selective oxidation and hydrogen removal in the presence of carbon monoxide in the prior art, and a new method for selective oxidation and hydrogen removal of CO mixed gas is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Catalyst preparation:

[0020] Weigh 100 grams of alumina carrier whose specific surface area is 50 square meters per gram, according to 0.5% Pd / Al 2 o 3 The content of the catalyst is configured as follows: select palladium nitrate, prepare an impregnation solution according to the palladium load, impregnate the alumina carrier in the solution for 10 hours, and dry it in vacuum at room temperature for 12 hours to obtain a solid. The solid was then dried at 120°C for 4 hours, calcined at 450°C for 6 hours, and then reduced with hydrogen at 300°C for 4 hours to obtain the desired 0.5% Pd / Al 2 o 3 catalyst.

[0021] The inert filler is selected from alumina, the mixing ratio of the inert filler and the catalyst is 1:1, the CO gas with a hydrogen content of 1% is used as the raw material, and the molar ratio of hydrogen in the oxygen to the raw material is 0.8:1. The mixed bed reactor The reaction temperature is 150°C, and the volumetric space velocity is 500 hours -1...

Embodiment 2

[0023] Prepare 0.8%Pd / Al according to the catalyst preparation method of embodiment 1 2 o 3 catalyst.

[0024] The inert filler is selected from alumina, the mixing ratio of the inert filler and the catalyst is 2:1, the CO gas with a hydrogen content of 3% is used as the raw material, and the molar ratio of hydrogen in the oxygen to the raw material is 2:1, the mixed bed reactor The reaction temperature is 180°C, and the volume space velocity is 1500 hours -1, under the condition that the reaction pressure is 2.0MPa, the raw material is contacted with the catalyst through a mixed bed reactor equipped with an inert filler and a palladium-containing catalyst, and the reaction is carried out. The reaction result is: the loss rate of CO is 0.5%, and the hydrogen in the reaction effluent The content is 3ppm.

Embodiment 3

[0026] Prepare 1.2%Pd / Al according to the catalyst preparation method of embodiment 1 2 o 3 catalyst.

[0027] The inert filler is selected from inert ceramic balls, the mixing ratio of the inert filler and the catalyst is 3:1, the CO gas with a hydrogen content of 0.3% is used as the raw material, and the molar ratio of hydrogen in the oxygen to the raw material is 5:1, and the mixed bed reaction The reactor reaction temperature is 200°C, and the volume space velocity is 5000 hours -1 , under the condition that the reaction pressure is 0.05MPa, the raw material is contacted with the catalyst through a mixed bed reactor equipped with an inert filler and a palladium-containing catalyst, and the reaction is carried out. The reaction result is: the loss rate of CO is 0.6%, and the hydrogen in the reaction effluent content is 0.

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Abstract

The invention relates to a method for hydrogen removal of CO mixed gas by selective oxidation. The invention mainly solves the technical problems of low hydrogen removal rate and high CO loss rate in the prior art. The invention adopts hydrogen-containing CO mixed gas as a raw material, allows the raw material to contact a catalyst in a compound bed reactor where inert fillers and the catalyst with platinum-group metals as active components are loaded under a condition with a molar ratio of oxygen and the hydrogen in the raw material of 0.5-5:1, a reaction temperature of 100-300 DEG C, a volume space velocity of 100-10000 h-1, and a reaction pressure of -0.08-5.0 MPa so as to allow the hydrogen in the reaction effluent to be oxidated into water; wherein, on a carrier weight basis, the content of the active component of platinum-group metals is 0.05-1.5%, and the mixing ratio of the inert fillers and the catalyst is 0.1-5:1. The above technical scheme solves the problems well, and the method is applicable to the industrial production of hydrogen removal of CO mixed gas by oxidation.

Description

technical field [0001] The invention relates to a method for selectively oxidizing and removing hydrogen with CO mixed gas, in particular to a method for oxidizing and removing hydrogen from CO coupling raw material gas for oxalate ester production. Background technique [0002] Oxalate is an important organic chemical raw material, which is widely used in the fine chemical industry to produce various dyes, medicines, important solvents, extractants and various intermediates. In the 21st century, oxalate, as a degradable and environmentally friendly engineering plastic monomer, has received extensive international attention. In addition, oxalate can be hydrolyzed under normal pressure to obtain oxalic acid, and ammonia under normal pressure can be used to obtain high-quality slow-acting fertilizer oxamide. Oxalate can also be used as a solvent to produce pharmaceutical and dye intermediates, etc., such as various condensation reactions with fatty acid esters, cyclohexylacet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/18C01B32/40
Inventor 李斯琴刘俊涛蒯骏
Owner CHINA PETROLEUM & CHEM CORP
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