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Catalyst for deeply removing CO at low temperature as well as preparation and activation methods and application thereof

A technology of catalyst and composite catalyst, which is applied in the direction of chemical change purification/separation, nitrogen purification/separation, etc. It can solve the problems of no clear activation method and unclear service life of adsorbed substances, so as to achieve excellent CO removal performance and reduce equipment investment , the effect of easy industrial production

Inactive Publication Date: 2012-11-14
SHANGHAI RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] CN1681583A and US2005 / 0241478 disclose a copper-zinc-zirconium adsorption material to remove carbon monoxide from the material flow. The adsorption material can only remove carbon monoxide by adsorption. More importantly, there are no examples to clarify the reaction conditions and the removal of trace CO. In addition to the depth, the service life of the adsorbent is not clear, etc.
However, what is disclosed is the preparation of the catalyst precursor, and there is no clear and suitable activation method, which is an essential key technology in the preparation of this type of catalyst

Method used

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  • Catalyst for deeply removing CO at low temperature as well as preparation and activation methods and application thereof
  • Catalyst for deeply removing CO at low temperature as well as preparation and activation methods and application thereof
  • Catalyst for deeply removing CO at low temperature as well as preparation and activation methods and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～7

[0044] CuO / ZnO / ZrO 2 Preparation of composite oxide catalyst precursor

[0045] According to the ratio: CuO: ZnO: ZrO 2 =x:y:(1-x-y) Weigh the raw materials, and the values ​​of x and y are percentages by weight, as shown in Table 1.

[0046] Prepare Cu, Zn, Zr metal nitrates into solutions of a certain concentration, and mix them evenly under stirring; through a certain precipitation method, precipitate with ammonium carbonate solution under stirring and a certain temperature, after the precipitation is completed, adjust the pH value of the system ; Aging the obtained catalyst precursor at a certain temperature, fully stirring; taking out the solid product, washing it repeatedly with deionized water at a certain temperature, centrifuging, and placing it in a drying oven at 110°C for overnight drying; at 350-550°C Calcined for 6.0 hours and cooled to room temperature to obtain calcined CuO / ZnO / ZrO 2 Composite oxide products;

[0047] The precipitation methods include co-cu...

Embodiment 8～11

[0060] CuO / ZnO / ZrO 2 Activation of composite oxide catalysts

[0061] After compressing and crushing the composite oxide catalyst prepared in Embodiment 5, sieve molecular sieve particles with a particle size of 80-100 mesh for activation.

[0062] The activation adopts a fixed bed catalytic reaction device, and the reactor is a stainless steel tube. The catalyst prepared in Example 5 is reduced and activated. The process conditions used for activation are: catalyst loading 3mL, activation temperature is 100-200 ° C, and the pressure is normal pressure. Activation time 4h, raw material is 10%H 2 / N 2 , with a volumetric space velocity of 4000 hours -1 . After characterization, the effects of different activation temperatures on the reduction degree of the catalyst are shown in Table 3.

[0063] Table 3 activation results

[0064]

Embodiment 12

[0066] Evaluation of Low Temperature Removal of Trace CO in Hydrocarbons

[0067] A fixed-bed catalytic reaction device is adopted, and the reactor is a stainless steel tube. The catalysts of Examples 8 to 11 are respectively evaluated for CO removal performance. The process conditions used for the evaluation are: the catalyst loading is 3 mL, the reaction temperature is 40 ° C, and the reaction pressure is 3MPa, the raw material is liquid phase propylene containing 20ppm CO, and the liquid phase space velocity is 8.0 hours -1 . After the product was decompressed, it was analyzed online with a helium ion detector GC9560, and the evaluation results are shown in Table 4.

[0068] Table 4 The results of trace CO removal in liquid phase propylene

[0069]

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Abstract

The invention relates to a catalyst for deeply removing CO at low temperature as well as the preparation and activation methods and the application thereof. The catalyst is the CuO-ZnO-ZrO2 composite catalyst which comprises 50-90wt% of CuO, 5-40wt% of ZnO and 5-40wt% of ZrO2. The copper-containing component has the reduction degree of 70-80%, and the reduction degree is represented by the ratio of the weight of the metallic copper to the total weight of the metallic copper and the copper oxide calculated according to the CuO. Compared with the prior art, the catalyst is used for removing the CO in the liquid or gaseous hydrocarbon and / or inert gas and has the characteristics of high activity at low temperature of 0-50 DEG C, high removal depth of 20ppb or lower and long service life. The process for preparing the catalyst is simple, and the cost spent in preparing the catalyst can be lowered.

Description

technical field [0001] The invention relates to a catalyst for removing CO from hydrocarbon or inert gas materials, its preparation method, activation method and application. The invention is especially suitable for the removal of trace amounts of CO in α-olefins and saturated hydrocarbons in the field of petrochemical industry, or the preparation of high-purity gases (such as nitrogen, helium, argon, etc.) in the electronic industry. Background technique [0002] In various industrial fields, the presence of trace carbon monoxide is often harmful to the reaction system and needs to be removed as an impurity. With the development of polyolefin technology, highly active polyolefin catalysts are very sensitive to poisons, and polyolefin raw materials are required to be "polymerization grade" olefins. Specifically, the carbon monoxide impurity in olefin raw materials does not exceed 30ppb. Typical is the propylene polymerization process. With the development of propylene polym...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/80C07C7/148C01B21/04
Inventor 叶丽萍李建龙罗勇吴向阳张荣李帅麦永懿
Owner SHANGHAI RES INST OF CHEM IND
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