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Strongly acidic spherical activated clay as well as preparation method and application thereof

An activated clay and strong acid technology, applied in the chemical field, can solve the problems of expensive molecular sieves, low strength, and limited life of granular clay, and achieve the effects of uniform specifications, low cost, and long cycle life

Pending Publication Date: 2019-06-14
SINOPEC YANGZI PETROCHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of limited service life, low strength and expensive molecular sieve of granular clay, the present invention provides a new type of spherical activated clay, and provides the above-mentioned preparation method of spherical activated clay, as well as the use of the clay in removing and mixing Application of Olefins in Aromatics

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  • Strongly acidic spherical activated clay as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0022] 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, mix 1.38kg aluminum trichloride and 1.82kg H 3 PW 12 o 40 ·8H 2 O was dissolved in 15kg of ethanol, and the ethanol solution was sprayed on the surface of a dried 30kg sphere, dried at 150°C, and roasted at 250°C for 8 hours to prepare strongly acidic spherical activated clay A for removing olefins in aromatics.

Embodiment 2

[0024] 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, mix 1.38kg aluminum trichloride and 5.42kg H 3 PW 12 o 40 ·8H 2 O was dissolved in 15kg of methanol, and the methanol solution was sprayed on the surface of a dried 30kg sphere, dried at 150°C, and roasted at 250°C for 6 hours to prepare strongly acidic spherical activated clay B for removing olefins in aromatics.

Embodiment 3

[0026] 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, mix 0.69kg aluminum trichloride and 3.45kg H 3 PW 12 o 40 ·8H 2 O was dissolved in 15kg of tetrachloromethane, and the tetrachloromethane solution was sprayed on the surface of a dried 30kg sphere, dried at 150°C, and roasted at 200°C for 6 hours to obtain a strongly acidic spherical activity for removing olefins in aromatics White clay C.

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Abstract

The invention discloses strongly acidic spherical activated clay as well as a preparation method and application thereof in removal of olefin in aromatic hydrocarbon. The strongly acidic spherical activated clay is prepared by modifying commercial clay with aluminum trichloride and heteropoly acid, and the sphere diameter of the spherical activated clay is 0.3-8 mm. The strongly acidic spherical activated clay provided by the invention is simple to prepare and low in cost, has relatively good deolefination and desulfurization performance and long service life, and can reduce the bromine indexto 5mgBr / 100g or below at the reaction temperature of 90-230 DEG C, and the service life can reach 1-2 years.

Description

technical field [0001] The invention belongs to the field of chemistry, and in particular relates to a strongly acidic spherical activated clay, a preparation method thereof and an application for removing olefins in aromatic hydrocarbons. Background technique [0002] Aromatics are a class of bulk chemicals with a wide range of uses, mainly produced by naphtha reforming processes. 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, disproportionation...

Claims

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Application Information

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IPC IPC(8): B01J31/18B01J27/188C10G45/12
Inventor 刘经伟李泽壮方晓江杨爱武王英武
Owner SINOPEC YANGZI PETROCHEM