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A preparation method and application of spherical activated clay for removing olefins in aromatics

An activated clay and spherical technology, which is used in the preparation of spherical activated clay for removing olefins in aromatic hydrocarbons and its application field, can solve the problems of low strength, limited life of granular clay, and expensive molecular sieves, etc. uniform effect

Inactive Publication Date: 2017-07-04
安徽力奥环境新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems of limited service life, low strength and expensive molecular sieve of granular clay, the present invention provides a novel preparation method of spherical activated clay, and uses the clay to remove olefins in mixed aromatics

Method used

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  • A preparation method and application of spherical activated clay for removing olefins in aromatics
  • A preparation method and application of spherical activated clay for removing olefins in aromatics

Examples

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Effect test

Embodiment 1

[0023] Weigh 200 kg of commercial bentonite, add 200 kg of 70% sulfuric acid aqueous solution, activate at a reaction temperature of 80° C. for 10 hours, dry the activated bentonite at 150° C., and grind it into a fine powder of 150 to 300 meshes. Take 150kg of fine powder, add 15kg of sulfuric acid aqueous solution with a pH of 5 to 6, and roll it with a rotary device, so that the powder is superimposed layer by layer during the rotation process so that the diameter of the ball is controlled at 8mm. Dry the sphere at 200°C, dissolve 1.48kg of aluminum trichloride and 0.75kg of titanium sulfate in 15kg of water, spray the aqueous solution on the surface of the dried sphere, dry at 150°C, and roast at 350°C for 8 hours to obtain Spherical activated clay A for removing olefins in aromatics.

Embodiment 2

[0025] Weigh 200 kg of commercial bentonite, add 800 kg of 20% sulfuric acid aqueous solution, activate at a reaction temperature of 25° C. for 24 hours, dry the activated bentonite at 120° C., and grind it into a fine powder of 150 to 300 meshes. Take 150kg of fine powder, add 120kg of sulfuric acid aqueous solution with a pH of 5 to 6, and use a rotary device to roll, so that the powder is stacked layer by layer during the rotation to control the diameter of the ball at 0.3mm. Dry the sphere at 250°C, dissolve 5.98kg of aluminum trichloride and 5.26kg of titanium sulfate in 60kg of water, spray the aqueous solution on the surface of the dried sphere, dry at 120°C, and roast at 550°C for 0.5 hours to obtain Spherical activated clay B for removing olefins in aromatics.

Embodiment 3

[0027] Weigh 200kg of commercial bentonite, add 300kg of 50% sulfuric acid aqueous solution, activate at a reaction temperature of 70°C for 14 hours, dry the activated bentonite at 140°C, and grind it into a fine powder of 150-300 meshes. Take 150kg of fine powder, add 40kg of sulfuric acid aqueous solution with a pH of 5 to 6, and roll it with a rotary device, so that the powder is stacked layer by layer during the rotation to control the diameter of the ball at 1mm. Dry the sphere at 220°C, dissolve 2.45kg of aluminum trichloride and 1.98kg of titanium sulfate in 30kg of water, spray the aqueous solution on the surface of the dried sphere, dry at 140°C, and roast at 450°C for 3 hours to obtain Spherical activated clay C for removing olefins in aromatics.

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Abstract

The invention discloses a preparation method and application of a ball-type activated clay for removing alkene in aromatic hydrocarbons. Compared with common particle white clay, the ball-type activated clay provided by the invention has characteristics of high mechanical strength, high initial alkene removal activity and long running life. Under the reaction temperature of 150-230 DEG C, the ball-type activated clay has initial alkene removal activity no nor than 5.0 mg Br / 100g, bromine index reduced to under 20 Br / 100g and service life of 1-3 years, and has good industrial application prospects.

Description

[0001] 1. Technical field [0002] The invention relates to a method for preparing spherical activated clay with bentonite or attapulgite, and the prepared spherical activated clay is used for removing olefins in aromatic hydrocarbons. [0003] 2. Background technology [0004] Aromatics are an important class of bulk chemical raw materials and good solvents, mainly produced by naphtha reforming process. In the process of producing aromatics, the double centers on the surface of the reforming catalyst will lead to the formation of a small amount of by-product olefins. These olefins are active in nature, not only easy to form colloids and affect product quality, but also bring troubles to subsequent processing such as the adsorption and separation of aromatics. come difficult. In order to obtain qualified chemical raw materials and ensure the good operation of downstream processes, a refining process is usually set up downstream of reforming, aromatics extraction, isomerization...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/12B01D53/02
Inventor 马正东
Owner 安徽力奥环境新材料有限公司
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