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A kind of attapulgite-based precious metal reforming to produce oil-phase hydrodeolefination catalyst and its preparation method and application

A technology of precious metals and catalysts, which is applied in the field of preparation of oil liquid phase hydrodeolefination catalysts from reforming, can solve the problems of expensive catalysts, high catalyst activity, loss of aromatics, etc., to control the loss of aromatics, increase the contact area, active smooth effect

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 precious metal reforming to produce oil-phase hydrodeolefination 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. Weigh 0.18g rhodium chloride, 0.52g cobalt nitrate, 6.36g sodium carbonate, dissolve in deionized water to make the solution concentration 0.8mol / L, and heat to 40°C, slowly add citric 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 12 hours, and dry at a constant temperature at 110°C for 12 hours. Grinding into powder, adding molding aids, drying at 120°C for 12 hours, and then calcining at 5...

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 rhodium chloride, 0.52g cobalt nitrate, 2.86g magnesium chloride, dissolve in deionized water to make the solution concentration 0.5mol / L, and heat to 70°C, slowly add nitric acid to the mixed solution to make the 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, dry at 130°C f...

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 rhodium nitrate, 0.34g chromium trichloride, 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 500°...

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Abstract

The invention relates to a liquid-phase hydrogenation catalyst for removal of olefins from reformate and application thereof. By using modified attapulgite acidized with inorganic acid as a carrier, the catalyst contains 0.1-3.0 wt% of an active component and 0.05-2.0 wt% of an auxiliary agent. The catalyst is used for removal of olefins by liquid-phase continuous hydrogenation of reformate. When the reaction temperature is 120-180 DEG C, the reaction pressure is 1.0-2.0 MPa, space velocity is 1-12 h<-1> and the hydrogen-to-oil ratio is 6:1-16:1, trace olefins in the reformate can be effectively removed. Bromine index of a product is less than 100 mgBr / 100g of oil, and loss of aromatic hydrocarbons is less than 0.5 wt%. The invention has the following advantages: the catalyst is environment friendly; there is no pollution problem of traditional carclazyte process; price of attapulgite is low; cost of the catalyst is obviously reduced in comparison with cost of other catalysts; and the catalyst of the invention has good catalytic activity and long service life.

Description

technical field [0001] The invention relates to the field of hydrorefining of petroleum products, in particular 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 olefin content...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/652B01J23/89C10G45/10
CPCB01J23/6522B01J23/8946C10G45/10C10G2300/70
Inventor 李为民金天黄伟邱玉华姚超
Owner CHANGZHOU UNIV