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Process for producing aromatics from oxygenated compounds

A compound and aromatics technology, which is applied in the field of oxygen-containing compounds to produce aromatics, can solve the problems of poor xylene selectivity and low xylene yield, and achieve the effects of improving selectivity, good technical effects, and enhancing hydrothermal stability

Active Publication Date: 2016-08-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is that the existing method for producing aromatics from oxygen-containing compounds has the technical problems of low xylene yield and poor p-xylene selectivity

Method used

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  • Process for producing aromatics from oxygenated compounds

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh 200 grams of ZSM-5 molecular sieve with a grain size of 2 μm (the molar ratio of silica to alumina is 400), mix silica sol, tetrapropylammonium hydroxide (25%) and gram water evenly, and transfer to Crystallize in a closed crystallization kettle at 100°C for 180 hours to obtain the product. After washing and drying at 100~140°C for 4-24 hours, bake at 500~650°C for 4-24 hours to obtain a sodium-type core-shell composite molecular sieve SZK1. The NHS was exchanged three times with 1 mol / L ammonium nitrate at 80°C, dried at 120°C for 12 hours, and then calcined at 550°C for 4 hours to obtain a hydrogen-type core-shell molecular sieve HSZK1.

[0027] 180 grams of HSZK1 powder, 250 grams of aluminum sol (21%Al 2 o 3 ), 34.1 grams of kaolin (55.3% SiO 2 , 42.5%Al 2 o 3 , 2.2% other oxides), 1150 grams of water, mixed and beaten and emulsified until the diameter of the solid particles in the slurry is less than 5 microns to obtain the mixture I. The mixture I was ...

Embodiment 2~6

[0031]Obtain catalyst b~f according to the method similar to embodiment 1, the formula and synthesis condition of Silicate-1 / ZSM-5 core-shell composite molecular sieve can be seen in Table 1, the composition of catalyst can be seen in Table 2, following examples 2~6 and comparative example The evaluation conditions of the catalysts used in 1 to 2 are all the same as in Example 1, and the reaction evaluation results are listed in Table 3.

Embodiment 7~10

[0037] Examples 7-10 are the reaction results obtained by changing the process conditions using catalyst d, and their relevant parameters are listed in Table 3.

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Abstract

The invention relates to a method for preparing aromatic hydrocarbon from oxygenated chemicals. The method is mainly used for solving the technical problem of low xylene yield and low xylene selectivity in a process of preparing aromatic hydrocarbon from oxygenated chemicals in the prior art. The following technical solution is adopted in the invention to well solve the problem: with oxygenated chemicals as raw materials, under the conditions of a reaction temperature of 410-550 DEG C, a reaction pressure of 0.1-1.0 MPa and a weight space velocity of the oxygenated chemicals of (0.1-4)h<-1>, separating the oxygenated chemicals from non-aromatic mixture or product higher than C1 in the reaction product to obtain at least one of toluene material flows, contacting a fluidized bed catalyst to obtain an aromatic effluent containing hydrogen, methane, a non-aromatic mixture higher than C1, benzene, methylbenzene, mixed xylene and heavy aromatics higher than C9, wherein the used catalyst contains a Silicate-1 / ZSM 5 composite molecular sieve component, and the method can be used in the industrial production of preparing aromatic hydrocarbon from oxygenated chemicals.

Description

technical field [0001] The present invention relates to a method for producing aromatic hydrocarbons from oxygen-containing compounds, in particular, using Silicate-1 / ZSM-5 composite molecular sieve as the active component of the catalyst, separating oxygen-containing compounds and products to obtain C2-C7 aromatic hydrocarbon components A method for producing aromatic hydrocarbons from hydrocarbon mixtures with toluene. Background technique [0002] Aromatics (in which benzene, toluene and xylene are respectively called B, T and X, and the three are collectively called BTX) are important basic organic chemical raw materials. Aromatics mainly come from catalytic reforming and steam cracking by-product pyrolysis gasoline (nearly 90%)-petroleum route, and only about 10% from coal route. From the perspective of energy distribution, my country lacks oil and gas but is rich in coal, and its dependence on foreign crude oil has exceeded 50%, which has threatened national energy se...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C15/08C07C2/86B01J29/40
CPCY02P20/52
Inventor 汪哲明陈希强许烽
Owner CHINA PETROLEUM & CHEM CORP