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Catalyst for preparing light aromatics and light paraffins using hydrocarbons as raw materials

A technology for light aromatic hydrocarbons and light alkanes, applied in molecular sieve catalysts, physical/chemical process catalysts, organic chemistry, etc. The effect of smooth, high degree of dealkylation and high acid density

Active Publication Date: 2009-01-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that the binder in the bifunctional catalyst prepared by using the binder-containing zeolite carrier in the prior art will reduce the effective group content, resulting in a decrease in the amount of adsorption and a decrease in the effective surface area, resulting in technical problems of low activity and poor stability, providing a new catalyst for the preparation of light aromatics and light alkanes from hydrocarbon raw materials

Method used

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  • Catalyst for preparing light aromatics and light paraffins using hydrocarbons as raw materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Use tetrapropylammonium hydroxide (TPAOH) solution, tetraethylorthosilicate (TEOS) and water according to (TPA) 2 O: 5.5TEOS: 90H 2 The molar ratio of O was mixed and stirred evenly, aged and refluxed at 80° C. for three days to obtain the ZSM-5 seed crystal directing agent. Take by weighing 180 grams of white carbon black, 10 grams of squash powder, aqueous solution containing 19.7 grams of sodium aluminate and 40 grams of ZSM-5 seed directing agent, then add 230 grams of silica sol (40% by weight) and an appropriate amount of water to carry out After kneading and forming, drying is carried out to obtain a cylindrical precursor. A mixture of 35 grams of ethylenediamine and 5 grams of distilled water was added to the reaction kettle in advance, and 150 grams of the above-prepared cylindrical precursor was placed in the reaction kettle above the porous stainless steel mesh and sealed at 160 ° C for 5 days. . The product was washed and dried with distilled water, and t...

Embodiment 2

[0016] Take by weighing 100 grams of white carbon black and 20 grams of ultra-stable Y zeolite zeolite (SiO 2 / Al 2 o 3 Molar ratio is 16) the ZSM-5 seed crystal directing agent of 20 grams among the mixed embodiment 1, adds the Al containing 26 grams 2 (SO 4 ) 3 18H 2 The O aqueous solution adjusted the silicon-aluminum ratio of the mixture, and then added 150 grams of silica sol (40% by mass) for kneading and shaping, and then dried to obtain a cylindrical precursor. A mixture of 34 grams of ethylamine and distilled water was added to the reaction kettle in advance, and 100 grams of the above-prepared cylindrical precursor was placed in the reaction kettle above the porous stainless steel mesh and sealed, and gas-solid phase treatment was performed at 180° C. for 5 days. After the product was taken out, it was washed with distilled water, dried in the air, and then calcined at 550° C. in an air atmosphere to obtain a binder-free ZSM-5 / USY zeolite. Then carry out ion ex...

Embodiment 3

[0018] Take by weighing 180 grams of white carbon black and 140 grams of beta type zeolite (SiO 2 / Al 2 o 3 The mol ratio is 20) the ZSM-5 seed crystal directing agent of 40 grams among the mixed embodiment 1, adds and contains 110 grams of Al 2 (SO 4 ) 3 18H 2O aqueous solution was used to adjust the silicon-aluminum ratio of the mixture, and then 220 grams of silica sol (40% by mass) was added for kneading and shaping, followed by drying to obtain a cylindrical precursor. A mixture of 40 grams of ethylamine and distilled water was pre-added into the reaction kettle, and 100 grams of the above-prepared cylindrical precursor was placed in the reaction kettle above the porous stainless steel mesh and sealed, and then gas-solid phase treatment was performed at 150 ° C for 7 days. After the product was taken out, it was washed with distilled water, dried in the air, and then calcined at 550° C. in an air atmosphere to obtain a binder-free ZSM-5 / beta zeolite. Then carry out ...

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Abstract

The invention relates to a catalyst for preparing light aromatic hydrocarbons and light paraffin hydrocarbons by using hydrocarbon raw materials, and the catalyst is mainly used for solving the technical problems that a binding agent in a bifunctional catalyst which is prepared by using a zeolite carrier containing the binding agent of the prior art can reduce the content of effective components, cause the decrease of the absorption capacity, reduce the effective surface area and further cause lower activity and poorer stability. The catalyst comprises the following components counted by the percentage by weight: a) 0.01 to 0.8 percent of at least one of Pt or Pd; b) and the rest of at least one of binding agent-free mordenite, Beta zeolite, Y zeolite, ZSM-5 or ZSM-11, thereby preparing the bifunctional catalyst; therefore, the technical proposal can better solve the problems and can be used in the industrial production for the preparation of the light aromatic hydrocarbons and the light paraffin hydrocarbons by using the hydrocarbon raw materials.

Description

technical field [0001] The invention relates to a catalyst for preparing light aromatic hydrocarbons and light alkanes from hydrocarbon raw materials. Background technique [0002] In industry, the reformed product produced by the reforming process and the pyrolysis gasoline obtained from naphtha cracking are generally separated by solvent extraction to separate BTX aromatics and non-aromatics. This process is based on the extreme concentration of aromatics and non-aromatics in the used solvent different properties to achieve the purpose of separating the target aromatics. Although solvent extraction of BTX can obtain BTX aromatics with higher purity, it requires a complex solvent extraction device, and the extraction solvent needs to be continuously replenished during the extraction operation, so the solvent extraction process occupies a large part of the system. Take a huge percentage of the cost of BTX aromatics. US Patent No. 4,058,454 relates to a solvent extraction p...

Claims

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Application Information

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IPC IPC(8): B01J29/068C07C11/02C07C15/02
Inventor 王德举刘仲能李学礼侯闽渤
Owner CHINA PETROLEUM & CHEM CORP
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