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Method for preparing light arene and light alkane from hydrocarbon raw material

A technology for light aromatics and light alkanes, applied in hydrocarbon cracking, chemical instruments and methods, hydrocarbon oil cracking, etc., can solve the problems of decreased selectivity, poor adsorption selectivity, weakened adsorption capacity, etc., and achieves good Activity and stability, moderate hydrogenation performance, smooth orifice effect

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

The introduction of binder into zeolite powder molding will reduce the content of effective components, resulting in a decrease in adsorption capacity and a decrease in effective surface area
Since some components of the binder may enter the zeolite pores or block some zeolite pores, diffusion limitations are introduced, resulting in weakened adsorption capacity, poor adsorption selectivity, decreased adsorption and desorption rates, and reduced activity in catalytic reactions. , the selectivity decreases, and the binder component may cause some undesired side reactions

Method used

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  • Method for preparing light arene and light alkane from hydrocarbon raw material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] 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 crystal 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 wate...

Embodiment 2

[0015] 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 wt%) for kneading and drying 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, sealed, and then subjected to gas-solid phase treatment 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 exchange with ammonium ...

Embodiment 3

[0017] 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 2The O aqueous solution adjusted the silicon-aluminum ratio of the mixture, and then added 220 grams of silica sol (40 wt%) for kneading and 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 ion exchange with ammonium nitrate s...

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Abstract

The invention relates to a method for preparing light arene and light alkane by hydrocarbon raw materials, mainly solving the technical problems in the prior art that heavy arene and non-aromatic hydrocarbons have low utilization value and solvent extraction needs to be carried out for separating BTX (B is benzene, T is toluene and X is xylene) arene. Through taking reformate, cracked gasoline, a mixture containing C9<+> (C9 and more than C9) arene, naphtha and a mixture of the substances as raw materials and carrying out hydrogenation lightening treatment, the method ensures that heavy arene undergoes dealkylation reaction and transalkylation reaction and light arene undergoes isomerization reaction, and the like so as to be converted into a composition rich in BTX light arene; moreover, an adopted catalyst comprises at least one of Pt or Pd and at least one of mordenite, Beta-zeolite, Y zeolite, ZSM-5 zeolite or ZSM-11 zeolite, and the technical proposal solves the technical problems better, and can be used in the industrial production for arene.

Description

technical field [0001] The invention relates to a method for preparing light aromatic hydrocarbons and light alkanes by utilizing 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 extrac...

Claims

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Application Information

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IPC IPC(8): C07C4/06C07C15/02C10G47/18B01J29/068
Inventor 刘仲能王德举侯闽渤李学礼王建强
Owner CHINA PETROLEUM & CHEM CORP
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