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FCC (fluid catalytic cracking)-gasoline hydro-pretreating catalyst and method for preparing same

A gasoline hydrogenation and catalyst technology, which is applied in the treatment of hydrocarbon oil and petroleum industry, etc., can solve the problems of affecting the service life of the catalyst, the pores are easy to gel and block, and the gel capacity needs to be further developed, so as to improve the utilization rate and strengthen the The effect of improving gel ability and activity

Inactive Publication Date: 2013-10-30
WUHAN KELIN FINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN85100761A discloses a fiber-supported catalyst for selective hydrogenation of pyrolysis gasoline fractions, which is characterized in that it uses a catalyst with a specific surface area of ​​20-150 m2 / g and a pore volume of 0.1-0.3ml / g. η-Al2O3 porous fibrous carrier, the active component is platinum or palladium. When the diolefin content is too high, the pores of the catalyst are easily blocked by gelling, which affects the service life of the catalyst
[0009] In summary, the current research on the selective de-olefination of non-noble metal catalysts has made great progress, but in improving the hydrogenation selectivity of the catalyst, it is easy to Adhesive ability needs to be further developed
In addition, the existing technology mainly focuses on the hydrogenation removal of diolefins in gasoline, and rarely mentions the removal of small molecule sulfur in gasoline, but this kind of catalyst that has the functions of removing diolefins and small molecule sulfur at the same time has been widely used at present. Prime-G+ technology and RSDS technology are of great significance

Method used

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  • FCC (fluid catalytic cracking)-gasoline hydro-pretreating catalyst and method for preparing same
  • FCC (fluid catalytic cracking)-gasoline hydro-pretreating catalyst and method for preparing same
  • FCC (fluid catalytic cracking)-gasoline hydro-pretreating catalyst and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Add 92.9g of pseudo-boehmite, 12.3g of metatitanic acid, and 25.0g of magnesium oxide into a mortar and stir evenly, then add 2.5g of ethylene glycol, 1.0g of sesame powder and appropriate amount of distilled water, stir and roll evenly, and then squeeze. Forming, drying at 100℃ for 5h, then raising the temperature to 700℃, roasting in the air for 2h, and then passing in 2% ammonia solution, the volume ratio of ammonia vapor to air is 3:10, and keeping it at 600℃ for another 2h , And then stop adding ammonia solution, and continue roasting in the air at 700℃ for 1h to obtain Al 2 O 3 -TiO 2 -MgO carrier. The carrier is weakly acidic, with an average pore diameter of 22nm, a pore volume of 0.89ml / g, and a specific surface area of ​​214m 2 / g, the bulk density is 0.82g / ml, the crushing strength is 132N / cm, and the carrier is named 1# carrier.

Embodiment 2

[0034] Add 107.1g of pseudo-boehmite (water content 30%, the same below), 18.4g of metatitanic acid, and 10.0g of magnesium oxide into a mortar and stir evenly, then add 3.5g of starch, 3.0g of sesame powder and an appropriate amount of distilled water. After stirring and rolling evenly, extrusion molding, drying at 150°C for 3 hours, then raising the temperature to 500°C and roasting in air for 4 hours, and then passing in 2% aqueous ammonia solution. The volume ratio of ammonia vapor to air is 4:10. At 500℃, keep constant temperature for 3h, then stop adding ammonia solution, and continue roasting at 500℃ in air for 2h to obtain Al 2 O 3 -TiO 2 -MgO carrier. The carrier is weakly acidic, with an average pore diameter of 20nm, a pore volume of 0.74ml / g, and a specific surface area of ​​195m 2 / g, the bulk density is 0.75g / ml, the crushing strength is 127N / cm, the carrier is named 2# carrier.

Embodiment 3

[0036] Add 85.7g of pseudo-boehmite, 24.5g of metatitanic acid, and 20.0g of magnesium oxide into a mortar and stir evenly, then add 3.0g of diethylene glycol, 2.0g of sesame powder and a suitable amount of distilled water, stir and roll evenly and then squeeze Molding, drying at 130°C for 4h, then raising the temperature to 600°C and roasting in the air for 3h, and then passing in 2% ammonia solution. The volume ratio of ammonia vapor to air is 3.5:10, and the temperature is kept at 700°C for another 2h , And then stop adding ammonia solution, continue roasting in air at 600℃ for 2h to obtain Al 2 O 3 -TiO 2 -MgO carrier. The carrier is weakly acidic, with an average pore diameter of 17nm, a pore volume of 0.56ml / g, and a specific surface area of ​​175m 2 / g, the bulk density is 0.87g / ml, the crushing strength is 122N / cm, and the carrier is named 3# carrier.

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Abstract

The invention relates to an FCC (fluid catalytic cracking)-gasoline hydro-pretreating catalyst and a method for preparing the FCC-gasoline hydro-pretreating catalyst. The FCC-gasoline hydro-pretreating catalyst is a supported catalyst prepared by impregnating an Al2O3-TiO2-MgO composite oxide which servers as a carrier with Ni, Mo and Co, wherein the active components of the FCC-gasoline hydro-pretreating catalyst are distributed like an eggshell. The Al2O3-TiO2-MgO composite oxide which servers as the carrier comprises 10-20% by weight of TiO2, 10-15% by weight of MgO and the balance of Al2O3. The carrier is weakly acidic, has the average pore size distribution of 17-22nm, the pore volume of 0.56-0.89ml / g, the specific surface area of 175-214m<2> / g, the bulk density of 0.75-0.87g / ml and the anti-crushing strength of 120N / cm or higher. The FCC-gasoline hydro-pretreating catalyst provided by the invention comprises 4.8-7.2% by weight of NiO, 3.1-4.5% by weight of MoO3 and the balance of CoO. The FCC-gasoline hydro-pretreating catalyst presents good bis-olefin removal activity, small-molecule sulfur removal activity and bis-olefin hydrogenation selectivity when being used for treating the FCC gasoline under the condition that the temperature is 80-130 DEG C, the pressure is 1.0-2.0Mpa, the space velocity is 2-5h<-1> and the critical hydrogen and oil volume ratio is 400:1. In addition, the FCC-gasoline hydro-pretreating catalyst has strong gumming resisting capacity and quite long service life.

Description

technical field [0001] The invention relates to a catalyst used in an FCC gasoline hydrogenation pretreatment process and a preparation method thereof. Specifically, it is an Al 2 o 3 -TiO 2 - MgO composite oxide as a carrier, a supported catalyst with Ni, Mo, and Co as active components. This catalyst is used in the FCC gasoline hydrogenation pretreatment process, which can hydrogenate diolefins into monoolefins, and monoolefins are basically Unsaturated, and can effectively remove small molecular sulfides in gasoline. The invention also relates to a preparation method of the catalyst. Background technique [0002] At present, the main problem of FCC gasoline is the high content of sulfur and olefins, which cannot meet the quality requirements of motor gasoline. Therefore, subsequent processing of FCC gasoline is required to improve its quality. Conventional hydrodesulfurization can effectively reduce the sulfur content in FCC gasoline, but it will greatly saturate ole...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/883C10G49/04
Inventor 王国兴张先茂吴阳春
Owner WUHAN KELIN FINE CHEM
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