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Method for increasing yield of xylene through lightening of heavy aromatic hydrocarbons

A technology for heavy aromatics and xylene, which is applied in chemical instruments and methods, bulk chemical production, organic chemistry, etc., can solve the problem of inability to effectively treat heavy aromatics components containing naphthalenes

Active Publication Date: 2017-04-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the shortcomings of the existing transalkylation technology that cannot effectively process heavy aromatic components containing naphthalene series

Method used

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  • Method for increasing yield of xylene through lightening of heavy aromatic hydrocarbons

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Add 60 grams of pseudo-boehmite to a certain amount of dilute nitric acid and Tianqing powder, knead evenly, extrude into strips, roast to make a carrier, and place it in an impregnation container after dicing. A certain amount of chloroplatinic acid and nickel nitrate were dissolved in water, impregnated on the surface of the carrier, dried at 120°C for 4 hours, and calcined at 500°C for 3 hours to prepare catalyst A1.

[0016] 70 g Na 2 Beta molecular sieve with O content less than 0.5% (weight) is mixed with 55 grams of pseudoboehmite and an appropriate amount of Tianqing powder, then a certain amount of dilute nitric acid is added to extrude, dried, and roasted to make a carrier, which is placed after pelletizing in an immersion container. Catalyst B1 was obtained by dissolving a certain amount of chloroplatinic acid and stannous chloride in water, co-impregnating the surface of the carrier, drying at 120°C for 4 hours, and calcining at 500°C for 3 hours.

[0017]...

Embodiment 2

[0019] Add 60 grams of kaolin to a certain amount of dilute nitric acid and Tianqing powder, knead evenly, extrude into strips, roast to make a carrier, and place it in an impregnation container after dicing. A certain amount of chloroplatinic acid and nickel nitrate was dissolved in water, impregnated on the surface of the carrier, dried at 120°C for 4 hours, and calcined at 500°C for 3 hours to prepare catalyst A2.

[0020] 70 g Na 2 O content is less than 0.5% (weight) MOR molecular sieve and 55 grams of pseudo-boehmite and an appropriate amount of Tianqing powder are evenly mixed, then a certain amount of dilute nitric acid is added, extruded, dried, and roasted to make a carrier, after pelletizing Place in a soaking container. Catalyst B2 was obtained by dissolving a certain amount of chloroplatinic acid and stannous chloride in water, co-impregnating the surface of the carrier, drying at 120°C for 4 hours, and calcining at 500°C for 3 hours.

[0021] Mix 10 grams of ca...

Embodiment 3

[0023] A certain amount of silica sol is added to 60 grams of magnesia, extruded and roasted to make a carrier, and placed in an impregnation container after being cut into pellets. A certain amount of chloroplatinic acid and nickel nitrate was dissolved in water, impregnated on the surface of the carrier, dried at 120°C for 4 hours, and calcined at 500°C for 3 hours to prepare catalyst A3.

[0024] 50 g Na 2 O content is less than 0.5% (weight) MOR molecular sieve, 20 grams of Na 2 O content is less than 0.5% (weight) ZSM-5 molecular sieve and 55 grams of pseudo-boehmite and an appropriate amount of Tianqing powder are mixed evenly, then add a certain amount of dilute nitric acid, extrude, dry, roast to make carrier, cut Place the pellets in the soaking container. Catalyst B3 was obtained by dissolving a certain amount of chloroplatinic acid and stannous chloride in water, co-impregnating the surface of the carrier, drying at 120°C for 4 hours, and calcining at 500°C for 3 ...

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Abstract

The invention relates to a method for increasing the yield of xylene through lightening of heavy aromatic hydrocarbons and mainly solves the problem that heavy aromatic hydrocarbon raw materials containing naphthalene compounds cannot be effectively treated with an existing alkyl transfer technique. By means of the method for increasing the yield of xylene through lightening of heavy aromatic hydrocarbons, effluents containing rich benzene, methylbenzene and xylene are produced from C9<+> heavy aromatic hydrocarbons containing the naphthalene compounds and taken as raw materials through two metal-supporting catalysts in the presence of hydrogen, the technical problem is solved better, and the method can be used for industrial production aiming at increasing the yield of xylene through lightening of the aromatic hydrocarbons.

Description

technical field [0001] The invention relates to a method for lightening heavy aromatics to increase xylene production. Background technique [0002] Carbon nine and above heavy aromatics (C 9 + A) It is a by-product of the aromatics production process. With the expansion of oil refining scale and the large-scale aromatics complex, more and more heavy aromatics resources are produced by-products. How to use these resources efficiently is an important way to improve the efficiency of the plant. At present, using toluene and carbon nine and above heavy aromatics (C 9 + A) The increase of xylene production by transalkylation reaction is a method of effectively utilizing heavy aromatics to increase the production of xylene, and is widely used. However, the higher the content of heavy aromatics with carbon ten and above in the reaction raw material, especially the higher the content of naphthalene series, the lower the catalyst activity and the easier it is to coke and deactiv...

Claims

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Application Information

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IPC IPC(8): C07C4/18C07C15/04C07C15/06C07C15/08B01J29/74B01J23/89B01J29/22B01J29/80
CPCY02P20/52
Inventor 李经球李华英童伟益陈燕孔德金
Owner CHINA PETROLEUM & CHEM CORP
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