Deoxidation catalyst for olefin gas, preparation method and application thereof

A technology of deoxidation catalysts and olefins, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve problems such as high operating temperature, high price, frequent regeneration, etc. Achieve the effects of low operating temperature, good stability and long service life

Active Publication Date: 2013-06-19
SOUTHWEST RES & DESIGN INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] According to the above technical problems, the present invention provides a catalyst with noble metal as the main active component and transition metal element as the auxiliary active component, which overcomes the high use temperature and high

Method used

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  • Deoxidation catalyst for olefin gas, preparation method and application thereof
  • Deoxidation catalyst for olefin gas, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0041] Example 1:

[0042] Carrier preparation

[0043] Dry mixing method: Weigh 146g pseudo-boehmite and 5g nanometer titanium dioxide, calcined at 800℃ for 2h, and mix them evenly. Rolling ball molding process is used to make spheres with a diameter of 2~4mm to obtain TiO 2 5% TiO 2 / Al 2 O 3 Composite carrier, denoted as TA-01.

[0044] Sol-gel method: Take 85ml of tetra-n-butyl titanate and slowly add dropwise to absolute ethanol, add while stirring

[0045] Add inhibitor glacial acetic acid, stir vigorously to form a colloidal solution, add deionized water to the solution, and slowly add 80g Al 2 O 3 , To form a gel. Then, the gel was dried at a constant temperature at 80°C for 10 hours, and the dried crystal was calcined at 300°C for 10 hours to obtain TiO 2 20% TiO 2 / Al 2 O 3 Composite carrier, denoted as TA-02.

[0046] Co-precipitation method: Take 50.3g of titanium sulfate or 23.7g of titanium tetrachloride, 376g of aluminum nitrate, dissolve it with deionized water, slowly ...

Example Embodiment

[0047] Example 2:

[0048] Weigh 0.017g of palladium chloride and 57.5g of manganese nitrate tetrahydrate and dissolve it in water to make a solution. Weigh 80g of carrier TA-01, immerse it in the above prepared solution, immerse it at room temperature for 6h, and dry at 80℃ for 5h, 300℃ After calcination for 5 hours, a deoxygenation catalyst with a Pd content of 0.01% (based on the weight of the carrier, the same below) and a Mn content of 20% (based on the oxide, the same below) is obtained. 20ml of the catalyst is randomly selected and loaded into the reactor. Enter the ethylene feed gas, the gas space velocity is 2000h-1, the reaction temperature is 200°C, the pressure is 5.0MPa, and the inlet oxygen content is about 2000ppm. The outlet oxygen content is less than 0.05 ppm.

Example

[0049] Examples 3 to 6:

[0050] Weigh 21.3g of chloroplatinic acid and dissolve in water and divide them into 4 parts. Weigh 34.7g of ferrous sulfate, 38.8g of cobalt nitrate, 30.4g of copper nitrate and 16.8g of zinc chloride, dissolve in water, and mix with Pt solution. Dipping solution, weigh 88g carrier TA-02 into each of the above-mentioned dipping solution, immerse at room temperature for 5h, dry at 150℃ for 5h, and roast at 600℃ for 2h, then the active component Pt content is 2.0%. The content of Fe, Co, Cu and Zn are all 10% deoxidation catalysts. 20ml of each catalyst was randomly selected and charged into the reactor, and ethylene feed gas was introduced. The gas space velocity was 20000h-1, the reaction temperature was 60°C, the pressure was 0.1MPa, and the inlet oxygen content was about 9900ppm. The outlet oxygen content is less than 0.05 ppm. The results are shown in Table 1.

[0051] Table 1 Deoxidation performance of the catalysts in Examples 3-6

[0052]

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Abstract

The invention provides a deoxidation catalyst for olefin gas, a preparation method and an application thereof. The deoxidation catalyst for the olefin gas comprises, by oxide, 0.01-5 % by weight percent of active components selected from one or more of Pd, Pt and/or Ag, 1-20 % by weight percent of an active additive selected from any one of Mn, Fe, Co, Cu and Zn compounds, and the balance being a carrier, wherein the carrier is a nano TiO2/Al2O3 composite carrier, and is prepared by a dry-mixing method, a sol-gel method or a co-precipitation method. The deoxidation catalyst is relatively high in mechanical strength, not easy to be pulverized, high in low-temperature activity, and long in service life, can be directly used for deoxidation and purification of industrial polyolefin, is free of reduction and activation, and can prevent olefin addition during a using process and can deoxidize oxygen not higher than 10000 ppm in the olefin to be less than 0.05 ppm.

Description

technical field [0001] The invention relates to the field of industrial olefin processing, in particular to an olefin gas deoxygenation catalyst and its preparation method and application. Background technique [0002] Ethylene and propylene are the basic raw materials of the petrochemical industry and also bulk chemicals with high added value. The deoxygenation and purification treatment of ethylene and propylene is very important for the downstream polyolefin production. [0003] In the industrial production of polyolefins, the existence of trace oxygen impurities will destroy the active center of high-efficiency polyolefin catalysts or participate in polymerization reactions, reduce the orientation ability of catalysts or form random active chains, which will not only reduce the activity, selectivity and yield of high-efficiency catalysts rate, but also affect the density, viscosity, molecular weight, cross-linking degree, isotacticity and performance of the polymer, and...

Claims

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Application Information

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IPC IPC(8): B01J23/656B01J23/89B01J23/60C07C11/04C07C7/148
CPCY02P20/52
Inventor 郑珩李洁陈耀壮曾健廖炯姚松柏雷菊梅
Owner SOUTHWEST RES & DESIGN INST OF CHEM IND
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