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A kind of attapulgite-based reforming to generate oil liquid phase hydrodeolefin catalyst and its preparation method and application

A catalyst and de-alkene technology, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as high catalyst activity, loss of aromatics, expensive catalysts, etc. , to increase the contact area, stabilize the activity, and control the loss of aromatics

Active Publication Date: 2018-10-19
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are also problems such as expensive catalysts, high catalyst activity at the initial stage of the reaction, and serious loss of aromatics.

Method used

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  • A kind of attapulgite-based reforming to generate oil liquid phase hydrodeolefin catalyst and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Weigh a certain amount of attapulgite and sodium hydroxide according to the mass ratio of 1:1, adjust the pH to 9 after dissolving, filter out after ultrasonic oscillation for 12 hours, dry at 110°C for 12 hours, and roast at 550°C for 4.5 hours. Weigh 10 grams of modified attapulgite and add it to 50 ml of dilute sulfuric acid solution with a concentration of 0.5 mol / L, heat to 60° C., stir for 2 hours, and take it out after cooling. Take by weighing 0.18g palladium chloride, 0.52g chloroplatinic acid, 6.36g sodium carbonate, dissolve with deionized water so that the solution concentration is 0.8mol / L, and heat to 40°C, slowly add citric acid to the mixed solution to make it The pH is 5.0, and the acidified modified attapulgite is added for impregnation, stirring continuously during the impregnation process, and the impregnated catalyst is filtered out after 12 hours, and dried at a constant temperature at 110° C. for 12 hours. Grinding into powder, adding molding aids...

Embodiment 2

[0032] Weigh a certain amount of attapulgite and sodium hydroxide at a mass ratio of 1:1.5, adjust the pH to 9 after dissolving, filter out after ultrasonic oscillation for 10 hours, dry at a constant temperature at 100°C for 11 hours, and roast at 450°C for 3.5 hours. Weigh 10 grams of modified attapulgite and add 50 ml of dilute sulfuric acid solution with a concentration of 1 mol / L into a beaker, heat to 80°C, stir for 1.5 hours, and take it out after cooling. Weigh 0.18g palladium chloride, 0.52g chloroplatinic acid, 2.86g magnesium chloride, dissolve with deionized water so that the solution concentration is 0.5mol / L, and heat to 70°C, slowly add nitric acid to the mixed solution to make its pH 6.0, adding the acidified modified attapulgite for impregnation, stirring continuously during the impregnation process, filtering out the impregnated catalyst after 8 hours, and drying at a constant temperature at 100°C for 11 hours. Grind into powder, add molding aids to shape, dr...

Embodiment 3

[0035] Weigh a certain amount of attapulgite and sodium hydroxide at a mass ratio of 1:0.5, adjust the pH to 8 after dissolving, filter out after ultrasonic oscillation for 14 hours, dry at 120°C for 8 hours, and roast at 500°C for 4 hours. Weigh 10 grams of modified attapulgite and add 50 ml of dilute sulfuric acid solution with a concentration of 1.5 mol / L into a beaker, heat to 70°C, stir for 2 hours, and take it out after cooling. Weigh 0.23g palladium nitrate, 0.34g platinum tetrachloride, 3.28g calcium nitrate, dissolve with deionized water to make the solution concentration 0.3mol / L, and heat to 50°C, slowly add oxalic acid to the mixed solution to make the pH 5.0, add the acidified modified attapulgite for impregnation, stir continuously during the impregnation process, filter out the impregnated catalyst after 9 hours, and dry at a constant temperature of 120°C for 8 hours. Grinding into powder, adding molding aids, drying at 120°C for 10 hours, and then calcining at ...

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Abstract

The invention relates to a catalyst for liquid-phase hydrogenation olefin removal of attapulgite-based reformate, and an application of the catalyst. According to the catalyst, modified attapulgite acidized by inorganic acid is used as a carrier, and the catalyst contains 0.1-3.0wt% of active components and 0.05-2.0wt% of an addition agent. The catalyst prepared by a preparation method disclosed by the invention is used for liquid-phase continuous hydrogenation olefin removal of the reformate, under the condition that the reaction temperature is 120-180 DEG C, the reaction pressure is 1.0-2.0MPa, the air speed is 1-12h<-1> and the hydrogen-oil ratio is (6 to 1) to (16 to 1), trace olefin in the reformate can be effectively removed, the bromine index of products is smaller than 100mg Br / 100g oil, and the loss of arene is less than 0.5wt%. The catalyst disclosed by the invention has the following advantages that the catalyst is environmental-friendly and does not have a pollution problem existing in a conventional carclazyte technology, the attapulgite is low in price, compared with the cost of other catalysts, the cost of the catalyst disclosed by the invention is greatly reduced, and besides, the catalyst is good in catalysis activity and long in service life.

Description

technical field [0001] The invention belongs to the field of hydrorefining of petroleum products, and in particular relates to a preparation method and application of a catalyst for reforming to generate oil liquid phase hydrodeolefins. Background technique [0002] Catalytic reforming is the process of rearranging the molecular structure of hydrocarbons in the naphtha fraction into a new molecular structure. It is an important process for the production of aromatics and solvent oil. It mainly includes: cycloalkane dehydrogenation to generate aromatics, alkane dehydrogenation Hydrocyclization to generate aromatics, isomerization of paraffins and naphthenes, and hydrocracking. [0003] After the naphtha fraction is catalytically reformed, the resulting oil is rich in aromatics and solvent oil fractions, and also contains a small amount of olefins. However, in a high-severity continuous catalytic reforming unit, the olefin content of the produced oil exceeds 1 wt%, and the ol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/58B01J23/62B01J23/44C10G45/10
CPCB01J23/58B01J23/626C10G45/10C10G2300/70
Inventor 李为民金天黄伟邱玉华姚超
Owner CHANGZHOU UNIV