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Pyrolysis gasoline selective hydrogenation catalyst and preparation method thereof

A technology for selective hydrogenation and pyrolysis of gasoline, applied in catalyst activation/preparation, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of affecting the catalytic performance of active components and low catalyst dispersion , Catalyst performance deterioration and other problems, to achieve the effect of shortening the preparation cycle, reducing the emission of gas pollutants, and reducing the content

Inactive Publication Date: 2011-11-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Catalysts prepared by traditional impregnation methods often have low dispersion and large nickel crystals, which affect the full play of the catalytic performance of active components
Using this method to prepare catalysts, the biggest problem is that the high temperature during the calcination process will lead to sintering of the active components, which will deteriorate the performance of the catalyst.

Method used

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  • Pyrolysis gasoline selective hydrogenation catalyst and preparation method thereof
  • Pyrolysis gasoline selective hydrogenation catalyst and preparation method thereof
  • Pyrolysis gasoline selective hydrogenation catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Nickel nitrate [Ni(NO 3 ) 2 ·6H 2 O], manganese nitrate [Mn(NO 3 ) 3 ·6H 2 O], potassium nitrate (K NO 3 ) was dissolved in water to make an aqueous solution, and then the pH value of the solution was adjusted to 10 with ammonia water, and the above-mentioned alumina carrier was impregnated by an equal impregnation method, and after being baked by an infrared lamp for 20 minutes, deionized water and isopropyl 40ml of the mixed solution prepared with alcohol was poured into the carrier loaded with nickel, and after uniform dispersion, the excess solution was poured out. Use the product under vacuum 60 The Coγ radiation source was irradiated at a dose rate of 30Gy / min for 15h. The irradiated sample was dried at 120° C. for 6 hours to obtain catalyst A, wherein the nickel content was 14%, the manganese content was 1.1%, and the potassium content was 1.6%.

Embodiment 2

[0052] Nickel nitrate [Ni(NO 3 ) 2 ·6H 2 O], ammonium molybdate [(NH 4 ) 2 Mo 7 o 24 4H 2 O], calcium nitrate [Ca(NO 3 ) 2 ] was dissolved in water to make an aqueous solution, and then the pH value of the solution was adjusted to 6 with ammonia water, and the above-mentioned alumina carrier was impregnated by an equal impregnation method, and after being baked by an infrared lamp for 20 minutes, deionized water and isopropyl 40ml of the mixed solution prepared with alcohol was poured into the carrier loaded with nickel-molybdenum-calcium, and the excess solution was poured out after uniform dispersion. Use the product under vacuum 60 The Coγ radiation source was irradiated at a dose rate of 30Gy / min for 15h. The irradiated sample was dried at 120° C. for 6 hours to obtain catalyst B, wherein the nickel content was 16%, the Mo content was 1.0%, and the calcium content was 1.2%.

Embodiment 3

[0054] Take by weighing 26.5g commercially available magnesium nitrate [Mg(NO 3 ) 2 .6H 2 O] dissolved in 30ml of deionized water, then diluted to 70ml with deionized water, weighed 100g of lanthanum-modified alumina carrier, sprayed the configured 70ml of magnesium nitrate solution on the alumina carrier, and placed in an oven at 120°C after drying Dry in medium for 24 hours, use the same steps and conditions as in Example 1 to prepare a carrier loaded with nickel-Mn-Mg-k, and after standing for 20 minutes, take deionized water and isopropanol with a volume ratio of 1:1 to prepare 40ml of the mixed solution of Ni-Mn-Mg-k was poured into the carrier loaded with Ni-Mn-Mg-k, and the excess solution was poured out after uniform dispersion. Use the product under vacuum 60 The Coγ radiation source was irradiated at a dose rate of 30Gy / min for 15h. The irradiated sample was dried at 120°C for 6h to obtain catalyst C, wherein the nickel content was 14%, the Mn content was 1.0%, t...

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Abstract

The invention discloses a pyrolysis gasoline selective hydrogenation catalyst and a preparation method thereof. The catalyst comprises a carrier and an active component loaded on the carrier, and the active component is obtained by reduction through ionizing radiation. The active component comprises a main active component of nickel and an auxiliary active component, and the nickel content is 5-40 wt% of the total weight of the carrier; the auxiliary active component is at least one of K, Mg, Ca, Ba, Cu, Ga, Zn, Ag, Mn, Co, Mo, W, Si and P, and the content is 0-10 wt% of the total weight of the carrier. According to the invention, a pyrolysis gasoline selective hydrogenation catalyst which comprises the carrier loaded with the metal active component is obtained by reducing a precursor of the metal active component or an oxide obtained by roasting the precursor of the metal active component through ionizing radiation. The catalyst prepared by the invention increases the utilization rate of the main active component, and thus both the hydrogenation activity and the selectivity of the catalyst are obviously improved.

Description

technical field [0001] The invention relates to the field of petrochemical industry, in particular to a pyrolysis gasoline selective hydrogenation catalyst and a preparation method thereof. Background technique [0002] Pyrolysis gasoline is a general term for the liquid by-product C5-C10 fractions produced during the cracking of light oil to produce ethylene and propylene. The composition of pyrolysis gasoline is very complex, mainly including benzene, toluene, xylene, mono-olefins, di-olefins, straight-chain alkanes, cycloalkanes, and organic compounds of nitrogen, sulfur, oxygen, chlorine and heavy metals, etc., a total of more than 200 components, of which Benzene, toluene, xylene (collectively referred to as BTX) are about 50-80% aromatics and 25-30% unsaturated hydrocarbons. In industrial production, it mainly cuts C6-C8 fractions, removes highly unsaturated hydrocarbons, such as chain conjugated dienes, styrene, and cyclic conjugated dienes, through one-stage selecti...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01J23/887B01J37/34C10G49/04
Inventor 王秀玲戴伟朱云仙
Owner CHINA PETROLEUM & CHEM CORP
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