Selective hydrogenation catalyst of cracked gasoline and preparation method of selective hydrogenation catalyst

A technology for selective hydrogenation and pyrolysis of gasoline, which can be used in catalyst activation/preparation, selective hydrorefining, chemical instruments and methods, etc. The problem of metal particle pollution in the reaction medium can shorten the preparation cycle, reduce the emission of gas pollutants, and easily control the particle size.

Active Publication Date: 2011-09-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the palladium hydrogenation catalyst prepared by electroless plating does not need to be reduced by hydrogen, it needs multiple sensitization and activation steps. This method not only wastes a large amount of palladium solution, but also is not easy to accurately control the palladium content on the catalyst. Insufficient

Method used

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  • Selective hydrogenation catalyst of cracked gasoline and preparation method of selective hydrogenation catalyst
  • Selective hydrogenation catalyst of cracked gasoline and preparation method of selective hydrogenation catalyst
  • Selective hydrogenation catalyst of cracked gasoline and preparation method of selective hydrogenation catalyst

Examples

Experimental program
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Example Embodiment

[0045] Example 1

[0046] Using commercially available lanthanum-modified alumina as the carrier (wherein the content of lanthanum in the carrier is 2%), the alumina is calcined at 1000 ° C, and the specific surface area of ​​the carrier is determined to be 155m 2 / g.

[0047] Preparation of catalyst A

[0048] Take 2.5ml of PdCl containing 103.3mgPd / ml 2 The solution was diluted to 70ml with deionized water, the pH was adjusted to 4.0 with sodium carbonate powder, 100g of the above-mentioned lanthanum-modified alumina carrier was weighed, and 70ml of the configured palladium chloride solution was sprayed onto the alumina carrier, and allowed to stand for 20 minutes. , take the mixed solution prepared by 20ml deionized water and 20ml isopropanol, pour it into the carrier loaded with Pd, and pour out the excess solution 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...

Example Embodiment

[0049] Example 2

[0050] Preparation of catalyst B

[0051] Take 2.5ml of PdCl containing 103.3mgPd / ml 2 The solution was diluted to 70 ml with deionized water and adjusted to pH 4.0 with sodium carbonate powder. Weigh 100 g of the lanthanum-modified alumina carrier in Example 1, spray the configured 70ml palladium chloride solution on the alumina carrier, dry it in an oven at 120° C. for 24 hours, and weigh commercially available lead nitrate. 800mg, dissolved in ionized water to prepare 70ml of lead nitrate solution, spray the configured lead nitrate solution on the alumina carrier containing palladium, and after standing for 20 minutes, take a mixed solution prepared by 20ml of water and 20ml of isopropanol, pour into the carrier loaded with Pd-Pb, and pour out the excess solution 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 samples were dried at 120 °C for 6 h to o...

Example Embodiment

[0052] Example 3

[0053] Preparation of catalyst C

[0054] The same steps and conditions as Example 2 were used, except that 640 mg of commercially available stannous chloride was used instead of 800 mg of lead nitrate to prepare catalyst C, wherein the content of Pd was 0.25%, and the content of Sn was 0.40%.

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Abstract

The invention discloses a selective hydrogenation catalyst of cracked gasoline and a preparation method of the selective hydrogenation catalyst. The catalyst comprises a carrier and an active component which is loaded on the carrier; the active component is obtained by ionizing radiation reduction; the active component comprises a main active component (palladium) and an auxiliary active component; the content of the palladium is 0.01 to 1.0 weight percent of the total weight of the carrier; the auxiliary active component is one or more of stannum (Sn), lead (Pb), copper (Cu), gallium (Ga), zinc (Zn), silver (Ag), antimony (Sb), manganese (Mn), cobalt (Co), molybdenum (Mo) and tungsten (W); and the content of the auxiliary active component is 0 to 3.0 weight percent of the total weight of the carrier. A metal active component precursor or oxide which is obtained by roasting the metal active component precursor is subjected to the ionizing radiation reduction to obtain the selective hydrogenation catalyst of the cracked gasoline, wherein the metal active component is loaded on the carrier of the catalyst. The catalyst prepared by the method improves the utilization rate of the main active component (palladium), so that the hydrogenation activity and 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): B01J23/44B01J23/62B01J37/34C10G45/40
Inventor 朱云仙王秀玲戴伟
Owner CHINA PETROLEUM & CHEM CORP
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