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Preparation method and application of catalyst for removing trace olefin in reformated generated oil

A technology for reforming to generate oil and catalysts, which is applied in the fields of metal oxide refining, petroleum industry, and hydrocarbon oil treatment, and can solve problems such as high cost, complicated preparation process, and poor catalytic removal of olefins

Inactive Publication Date: 2016-11-09
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the technical problems of complex preparation process, high cost and poor effect of catalytic removal of olefins in the existing catalyst, the present invention provides a preparation process of an acidified attapulgite catalyst loaded with a small amount of rare elements, and its use in catalytic removal and reforming Method for generating oil trace olefins

Method used

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  • Preparation method and application of catalyst for removing trace olefin in reformated generated oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Weigh 10 grams of refined attapulgite and add it to a beaker containing 40ml of dilute sulfuric acid solution with a concentration of 0.5mol / L, heat to 90°C, stir for 2 hours, take it out after cooling, then take the acidified attapulgite and add it to a beaker with a concentration of 40ml 0.5mol / L La(NO 3 ) 3 In a beaker of the solution, heat to 70°C, stir for 2 hours, and dry with suction. After adding molding aids for molding, dry at 110°C for 12 hours, and bake at 550°C for 8 hours. At this point, the catalyst reaction is complete.

[0021] Put 5 g of the prepared catalyst into a fixed-bed continuous tubular reactor, pump the reformed oil (raw material bromine index is 3877 mgBr / 100 g oil) into the reactor, keep the pressure at 1.3 MPa, and control the temperature at 160 ° C , airspeed 4h -1 , The reactor outlet sampling analysis bromine index is 76mgBr / 100g oil, and its conversion rate (initial activity) is 98.04%.

Embodiment 2

[0023] Weigh 10 grams of refined attapulgite into a beaker filled with 40ml of dilute sulfuric acid solution with a concentration of 1mol / L, heat to 80°C, stir for 1 hour, take it out after cooling, then add the acidified attapulgite into a beaker with a concentration of 40ml 1mol / L Ce(NO 3 ) 3 Put the solution in a beaker, heat to 70°C, stir for 1.5h, filter and dry with suction. After adding molding aids for molding, dry at 110°C for 12 hours, and bake at 550°C for 8 hours. At this point, the catalyst reaction is complete.

[0024] Put 5 g of the prepared catalyst into a fixed-bed continuous tubular reactor, pump the reformed oil (the bromine index of the raw material is 3877 mgBr / 100 g oil) into the reactor, keep the pressure at 1.5 MPa, and control the temperature at 190 ° C , airspeed 2h -1 , The reactor outlet sampling analysis bromine index is 56mgBr / 100g oil, and its conversion rate (initial activity) is 98.56%.

Embodiment 3

[0026] Weigh 10 grams of refined attapulgite into a beaker filled with 40ml of dilute sulfuric acid solution with a concentration of 2mol / L, heat to 70°C, stir for 2 hours, take it out after cooling, then add the acidified attapulgite into a beaker with a concentration of 40ml 2mol / L La(NO 3 ) 3 In a beaker of the solution, heat to 70°C, stir for 2 hours, and dry with suction. After adding molding aids for molding, dry at 110°C for 12 hours, and bake at 550°C for 8 hours. At this point, the catalyst reaction is complete.

[0027] 5g of the prepared catalyst was packed into a fixed-bed continuous tubular reactor, and the reformed oil (the raw material bromine index was 3877mgBr / 100g oil) was injected into the reactor with a pump, and the pressure was maintained at 1MPa, and the temperature was controlled at 160°C. Airspeed 5h -1 , The reactor outlet sampling analysis bromine index is 45mgBr / 100g oil, and its conversion rate (initial activity) is 98.84%.

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Abstract

The invention provides a method for preparing an acid catalyst by taking attapulgite acidulated with inorganic acid as a raw material, and a nitric acid solution of a rare earth element Re (Re=La, Ce) for modification, and the acid catalyst is used for removing trace olefin in reformated generated oil. The catalyst prepared by using the method has the advantages that on premise that a conventional clay method olefin removal device is not changed, a conventional clay catalyst is replaced, trace olefin of the reformated generated oil can be removed, the catalyst is simple in preparation process, low in cost, short in reaction time and high in conversion rate, and the service life of the catalyst is longer than 10 months, that is, the service life of the catalyst is far longer than that of 2-3 months of the clay.

Description

technical field [0001] The invention relates to a catalyst preparation method for removing trace olefins from reformed oil, and a method for removing olefins from reformed oil under non-hydrogenation conditions. Background technique [0002] Reformed oil (the intermediate product of aromatics production) contains a certain amount of olefin impurities. These olefin impurities are very active and can easily polymerize to form colloids that affect the quality of aromatic products. Even if the olefin content is very small (ppm level), it will affect Subsequent reaction processes have very adverse effects. In order to obtain qualified chemical raw materials and ensure the smooth progress of subsequent processes, a small amount of olefins in the reformed oil must be removed to improve the economic benefits of the aromatics processing process. [0003] There are four types of deolefination processes for reforming oil: ①clay clay refining; ②hydrocatalytic refining; ③molecular sieve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/10C10G29/16
CPCB01J23/10C10G29/16C10G2300/70
Inventor 李为民黄伟金天邱玉华姚超
Owner CHANGZHOU UNIV