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Bimetallic acid-free aluminosilicate porous composite material for direct aromatization of n-alkanes as well as preparation method and application of bimetallic acid-free aluminosilicate porous composite material

A porous composite material, n-alkane technology, applied in the field of petroleum refining, can solve the problems of low selectivity of target products, high coking, fast catalyst deactivation, etc., and achieve the effects of good atom economy and low coke production.

Pending Publication Date: 2020-07-17
广西华睿能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main way to prepare BTEX is through the catalytic reforming of petroleum raw materials such as naphtha, but the existing technology has problems such as low selectivity of target products, high coking, and rapid catalyst deactivation, which highlights the importance of optimizing the existing technology. How to improve the production process of BTEX has become a continuous research hotspot in the chemical industry for many years

Method used

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  • Bimetallic acid-free aluminosilicate porous composite material for direct aromatization of n-alkanes as well as preparation method and application of bimetallic acid-free aluminosilicate porous composite material
  • Bimetallic acid-free aluminosilicate porous composite material for direct aromatization of n-alkanes as well as preparation method and application of bimetallic acid-free aluminosilicate porous composite material
  • Bimetallic acid-free aluminosilicate porous composite material for direct aromatization of n-alkanes as well as preparation method and application of bimetallic acid-free aluminosilicate porous composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Example 1: Pt / KMFI (80:1)

[0049] Its preparation process is as follows:

[0050] 1) Al(NO 3 ) 3 9H 2 O was dissolved in tetrapropylammonium hydroxide (TPAOH, 40wt%) and stirred continuously at room temperature until Al(NO 3 ) 3 9H 2 O is completely dissolved.

[0051] 2) Add tetraethyl silicate (TEOS) dropwise to the solution prepared in step 1), and keep stirring. where Al 2 o 3 :SiO2 2 :TPAOH:H 2 The molar ratio of O is 1:80:21:943.

[0052] 3) The mixture prepared in step 2) was continuously stirred for 2 hours until a gel was formed. Then the obtained gel was transferred to a hydrothermal synthesis tank and kept at a constant temperature of 170 °C for 3 days. After natural cooling to room temperature, the product material in the solution can be separated by freeze-drying and the resulting solid substance recovered.

[0053] 4) Wash the solid matter in step 3) with deionized water for 3 times, then dry at 110°C for 12 hours at a pressure of 0.9 atmosp...

Embodiment 2

[0060] Embodiment 2: Pt / KMFI (KX-40) (silicon to aluminum ratio is 80:1)

[0061] Its preparation process is as follows:

[0062] 1) Al(NO 3 ) 3 9H 2 O was dissolved in tetrapropylammonium hydroxide (TPAOH, 40wt%) and stirred continuously at room temperature until Al(NO 3 ) 3 9H 2 O is completely dissolved.

[0063] 2) Add tetraethyl silicate (TEOS) dropwise to the solution prepared in step 1), and keep stirring. where Al 2 o 3 :SiO2 2 :TPAOH:H 2 The molar ratio of O is 1:80:21:943. During this process, a certain amount of KNO is added to the mixture 3 , so that the mass of K is Al 2 o 3 with SiO 2 4% of the total mass.

[0064] 3) The mixture prepared in step 2) was continuously stirred for 2 hours until a gel was formed. Then the obtained gel was transferred to a hydrothermal synthesis tank and kept at a constant temperature of 170 °C for 3 days. After natural cooling to room temperature, the product material in the solution can be separated by freeze-dryin...

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Abstract

The invention discloses a bimetallic acid-free aluminosilicate porous composite material for direct aromatization of n-alkanes as well as a preparation method and application of the bimetallic acid-free aluminosilicate porous composite material. The bimetallic acid-free aluminosilicate porous composite material is composed of metal with active sites and a matrix material of non-acidic porous aluminosilicate, wherein the matrix material is a molecular sieve including ZSM-5 type molecular sieve, the metal with the active sites is one or a mixture of more of Pt, Pd, Na, K, Ca and Ba, and the loading amount of each metal on the matrix material is 0.1-10% of the mass of the matrix material. The bimetallic acid-free aluminosilicate porous composite material prepared by the method can realize conversion of various alkanes (C6-C10) into aromatic hydrocarbon and other chemicals with high added value, and produces less coke.

Description

technical field [0001] The invention belongs to the field of petroleum refining, and in particular relates to a bimetallic acid-free aluminosilicate porous composite material used for direct aromatization of normal alkanes, a preparation method and application thereof. Background technique [0002] Aromatic compounds such as benzene, toluene, ethylbenzene and xylene (BTEX) are important chemical raw materials and can be used to produce a variety of important polymer materials and chemicals. At present, the main way to prepare BTEX is through the catalytic reforming of petroleum raw materials such as naphtha, but the existing technology has problems such as low selectivity of target products, high coking, and rapid catalyst deactivation, which highlights the importance of optimizing the existing technology. How to improve the production process of BTEX has become a continuous research hotspot in the chemical industry for many years. In addition, as the use of gasoline as a f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/44C07C15/04C07C15/06C07C15/073C07C15/08C07C2/76
CPCB01J29/44C07C2/76B01J2229/186B01J2229/40C07C15/04C07C15/06C07C15/073C07C15/08Y02P20/52
Inventor 宋华
Owner 广西华睿能源科技有限公司
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