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Alkadiene removal method for FCC gasoline light fractions

A technology for separating and removing diolefins and gasoline is applied in the field of selective hydrotreating and removing diolefins in the light ends of catalytically cracked gasoline to achieve the effect of reducing the surface coking process, strong adaptability of gasoline and improving arsenic resistance

Active Publication Date: 2019-03-15
博兴兴业精细化工产业发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst is especially suitable for the selective hydrogenation of FCC gasoline to remove diolefins

Method used

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  • Alkadiene removal method for FCC gasoline light fractions
  • Alkadiene removal method for FCC gasoline light fractions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1. Preparation of lanthanum magnesium aluminate LaMgAl 11 o 19 The process is as follows:

[0023] Take 7.8 grams of basic magnesium carbonate, 25 grams of lanthanum carbonate and 70.5 grams of aluminum hydroxide, mix well, add deionized water to form a highly dispersed suspension, spray dry, dry at 140 ° C for 5 hours, and place in an air atmosphere at 1300 ℃ for 4 hours, and then ball milled for 18 hours to obtain magnesium lanthanum aluminate powder. Add water to magnesium lanthanum aluminate powder, and obtain highly dispersed magnesium lanthanum aluminate slurry after ultrasonic vibration.

[0024] 2. Preparation of silica-alumina carrier

[0025] Take 170g of pseudo-boehmite and 30g of scallop powder, mix evenly, add dilute nitric acid, then add 32g of sodium polyacrylate nitric acid solution, and mix evenly, then add magnesium lanthanum aluminate slurry, mix evenly, and obtain aluminum-containing and aluminum-containing The mixture (1) of magnesium lanthanum ...

Embodiment 2

[0029] The preparation of magnesium lanthanum aluminate is the same as in Example 1, the preparation of the silica-alumina carrier is the same as in Example 1, and 68% of pseudo-boehmite is mixed evenly with the scallop powder, and the addition of pore-enlarging agent 1 sodium polyacid accounts for 19% of the mass of alumina was added, and the amount of pore-enlarging agent 2 methylcellulose accounted for 4% of the mass of alumina and silica added. The silica-alumina carrier contains 7.2 wt% of silica and 6.6 wt% of magnesium lanthanum aluminate.

[0030] The preparation method of the catalyst is the same as in Example 1, and the composition of the catalyst is shown in Table 1.

Embodiment 3

[0032] Preparation of nickel-containing magnesium lanthanum aluminate: get 7.8 grams of basic magnesium carbonate, 25 grams of lanthanum carbonate and 70.5 grams of aluminum hydroxide, mix well, add deionized water to form a highly dispersed suspension, then add 8 grams of nickel nitrate, through Spray drying, drying at 140° C. for 5 hours, calcination at 1300° C. for 4 hours in an air atmosphere, and ball milling for 18 hours to obtain nickel-containing magnesium lanthanum aluminate powder. The nickel-containing magnesium-lanthanum aluminate powder is added with water, and the highly dispersed nickel-containing magnesium-lanthanum aluminate slurry is obtained after ultrasonic vibration.

[0033] The preparation of the silica-alumina carrier is the same as in Example 1, except that the nickel-containing magnesium-lanthanum aluminate slurry is added, and 72% of the pseudo-boehmite is mixed evenly with the celadon powder, and the amount of the pore-enlarging agent 1 polyacrylate ...

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Abstract

The invention relates to an alkadiene removal method for FCC gasoline light fractions. Gasoline is firstly cut into light and heavy fractions, the cutting temperature is 70 DEG C, the light fractionsof gasoline enter into a reactor to carry out an alkadiene removal reaction, a used catalyst is a nickel-molybdenum hydrogenation catalyst, and the catalyst comprises a silicon oxide-aluminum oxide carrier and metal active components, such as nickel, molybdenum and strontium, loaded on the carrier; and the technological conditions of the reaction are as follows: the reaction temperature is 120 to210 DEG C, the reaction pressure is 1.5 to 3.5 MPa, the airspeed of liquid volume is 1.0 to 25.0 h<-1>, and the volume ratio of hydrogen to oil is (4 to 300): 1. The alkadiene removal method for FCC gasoline light fractions is well-adapted for different raw oil and high in alkadiene removal rate, the catalyst is unlikely to poison, and the catalytic performance is stable.

Description

technical field [0001] The invention relates to a method for removing dienes in the light fraction of FCC gasoline, which is suitable for selective hydrogenation to remove the dienes in the light fraction of catalytic cracking (FCC) gasoline. Background technique [0002] Distillates such as catalytic cracking gasoline, coking gasoline, and pyrolysis gasoline contain more diolefins. At a certain reaction temperature, in addition to their own polymerization, the diolefins will also react with other hydrocarbons to form coking precursors such as colloids. It is usually selectively removed by hydrogenation. US6,084,140 discloses a method for preparing a catalyst for the selective hydrogenation of highly unsaturated hydrocarbons in olefin fractions. The catalyst consists of alumina and metallic palladium supported on the alumina. The content of metallic palladium is 0.02-3.0% by weight. The catalyst can effectively remove highly unsaturated hydrocarbons in olefin fractions. ...

Claims

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Application Information

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IPC IPC(8): C10G45/08B01J23/755
CPCB01J23/755C10G45/08
Inventor 庄琼华
Owner 博兴兴业精细化工产业发展有限公司
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