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A method for removing mercaptan sulfur in catalytic cracking gasoline

A technology for catalytically cracking gasoline and mercaptan, which is applied in the field of gasoline desulfurization, can solve problems such as unqualified mercaptan sulfur content, etc., and achieve the effects of no loss of octane number, low olefin hydrogenation activity, and high removal activity.

Inactive Publication Date: 2015-08-12
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the residual sulfide in the final product is mercaptan sulfur, which leads to unqualified content of mercaptan sulfur in the product

Method used

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  • A method for removing mercaptan sulfur in catalytic cracking gasoline
  • A method for removing mercaptan sulfur in catalytic cracking gasoline
  • A method for removing mercaptan sulfur in catalytic cracking gasoline

Examples

Experimental program
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Effect test

preparation example Construction

[0048] Preparation of alumina support:

[0049] Weigh 1 kg of pseudo-boehmite and 25 g of scallop powder, mix them evenly, add 650 ml of nitric acid solution with a mass concentration of 10%, fully knead them and shape them in an extruder. Place at room temperature for 12h. Then it was dried at 100°C for 12h, and then calcined at 540°C for 3h. An alumina support is prepared.

[0050] Preparation of nano ZSM-5 molecular sieve and alumina composite solid acid carrier:

[0051] Weigh 220g of nano ZSM-5 molecular sieve powder, 1.14kg of pseudoboehmite and 30g of scallop powder, mix them evenly, add 780ml of nitric acid solution with a mass concentration of 10%, fully knead and shape in an extruder. Place at room temperature for 12h. Then it was dried at 100°C for 12h, and then calcined at 540°C for 3h.

[0052] Put the catalyst above in a 0.4mol / L ammonium nitrate solution at a solid-to-liquid ratio of 1:5, and place it at room temperature for 1 hour. After filtering, wash w...

Embodiment 1

[0056] Mix 11.0 g of ferric nitrate, 4.0 g of zinc nitrate, and 15 ml of deionized water to obtain a co-impregnation solution containing iron and zinc. 20g of alumina carrier was impregnated with the above impregnating solution at room temperature for 12h. Dry at 100°C for 12h, and bake at 540°C for 4h. Then 0.8 g of lanthanum nitrate, 0.7 g of ammonium dihydrogen phosphate and 15 ml of deionized water were mixed. The above catalyst was placed in the impregnation solution for 12h. After drying at 100°C for 12h and calcining at 540°C for 4h, catalyst A was obtained.

Embodiment 2

[0058] Mix 15.1 g of ferric nitrate, 5.0 g of zinc nitrate, and 15 ml of deionized water to obtain a co-impregnation solution containing iron and zinc. 20g of alumina carrier was impregnated with the above impregnating solution at room temperature for 12h. Dry at 100°C for 14h, and bake at 550°C for 4h. Then 1.1 g of lanthanum nitrate, 0.5 g of ammonium dihydrogen phosphate and 15 ml of deionized water were mixed. The above catalyst was placed in the impregnation solution for 12h. After drying at 100°C for 16h and calcining at 550°C for 6h, catalyst B was obtained.

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Abstract

The invention relates to a method for removing mercaptan sulfur contained in catalytically cracked gasoline, and belongs to the field of gasoline desulfurization. The method for removing the mercaptan sulfur contained in the catalytically cracked gasoline is catalytic reaction, the reaction conditions are as follows: the reaction pressure is 0.5-3.0 MPa, the volume ratio of hydrogen to oil is 50:1-600:1, the reaction temperature is 60-120 DEG C, the liquid hourly volumetric space velocity is 0.5-6.0 h<-1>, a catalyst takes aluminum oxide or a nanometer HZSM-5 molecular sieve and aluminum oxide composite solid acid as carriers and comprises the following components in percentage by weight based on the total weight of the catalyst: 5%-20% of zinc oxide, 5%-15% of iron oxide, 0.5%-5% of lanthanum oxide and 0.5-5% of phosphorus oxide. The method for removing the mercaptan sulfur contained in the catalytically cracked gasoline, which is disclosed by the invention, has the advantages of high removal activity of low-temperature mercaptan sulfur, low hydrogenation activity of alkene and basic zero loss of an octane number.

Description

technical field [0001] The invention relates to a method for removing mercaptan sulfur in catalytic cracking gasoline, which belongs to the field of gasoline desulfurization. Background technique [0002] With the rapid development of the automobile industry and the gradual strengthening of people's awareness of environmental protection, countries around the world have promulgated new environmental protection regulations and clean fuel oil standards. In February 2012, my country released the newly revised "Ambient Air Quality Standards", adding PM2.5 monitoring indicators. According to research data from the Ministry of Environmental Protection, in 2011 Beijing light vehicles emitted 807,000 tons of nitrogen oxides (NOx), 65,000 tons of particulate matter (PM), 1.662 million tons of hydrocarbons (HC), and 16.217 million tons of carbon monoxide (CO). Become the main source of air pollutants in Beijing and other cities. At the same time, the combustion of S and N in gasoline...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G45/04B01J27/185B01J29/46
Inventor 王祥生龙化云靳凤英
Owner DALIAN UNIV OF TECH
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