Catalyst for removing diolefins from distillate oil and preparation method thereof

A catalyst and diene technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc. The hydrogen-selective diene removal rate needs to be improved, so as to improve the anti-colloid ability, reduce the surface coking process, and inhibit the polymerization of olefins.

Active Publication Date: 2020-12-18
山东省安正安全咨询服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned catalysts have many components and complex preparation process, and the hydrogenation selectivity of diolefins and the removal rate of diolefins in some literatures need to be improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1. Preparation of lanthanum magnesium aluminate LaMgAl 11 o 19 The process is as follows:

[0021] 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.

[0022] 2. Preparation of silica-alumina carrier

[0023] 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

[0027] 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.

[0028] 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

[0030] 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.

[0031] 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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PUM

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Abstract

The invention relates to a catalyst for removing alkadiene in distillated oil. The catalyst comprises a silica-alumina carrier and active metal components loaded on the silica-alumina carrier such asNi, Mo and Sr. The catalyst comprises the following components in mass percent: 2-18 wt% of nickel oxide, 2-12 wt% of molybdenum oxide, 0.05-4.5 wt% of strontium oxide and 67-85 wt% of the silica-alumina carrier. The catalyst is high in hydrogenation activity, good in selectivity, resistant in gelatination and strong in water resistance.

Description

technical field [0001] The invention relates to a catalyst for removing diolefins from distillate oil and a preparation method thereof. The catalyst is suitable for removing diolefins and mercaptans in unsaturated hydrocarbon raw materials, especially for selective hydrogenation to remove diolefins and mercaptans in catalytic cracking gasoline. dienes. 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/755C10G45/08
CPCB01J23/755C10G45/08
Inventor 庄琼华
Owner 山东省安正安全咨询服务有限公司
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